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Durability of recycled aggregates concrete: a safe way tosustainable development

Salomon M. Levy a, b and Paulo Helene , b , c, d, ,

a

Centro Universitrio Nove de Julho (UNINOVE), So Paulo, Brazil Brazilian Con!rete Institute (IB"#CON), So Paulo, Brazil! Pol$te!hni! S!hool, Universit$ o% So Paulo, So Paulo, Brazild "eha ilitar Net&or' C E* +V -, .adrid, S/ain

"e!eived 01 .ar!h 23345 a!!e/ted 03 -e ruar$ 2336 #vaila le online 7 #/ril 2336

Abstract

-ine and !oarse re!$!led a88re8ates re!overed %ro9 de9olished 9asonr$ and !on!retestru!tures &ere utilized in the 9anu%a!ture o% ne& !on!rete 9i:tures hree /ro/erties o% thesene& !on!retes &ere anal$zed; &ater a sor/tion, total /ores volu9e, and !ar onation herecycled concrete %a9ilies &ere !reated $ re/la!in8 /arts o% the natural a88re8ates %or9in8%a9ilies o% !on!rete &ith 3

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reason, &e su88est that !learin8 the de ris %ro9 destro$ed uildin8s in su!h a &a$ as to o tain&aste !on!rete a88re8ates (>C#) to e reused in !on!rete /rodu!tion !ould &ell e a /artialsolution to environ9ental /ollution -or this stud$, the /h$si!al and 9e!hani!al /ro/erties alon8&ith their %reeze tha& dura ilit$ o% !on!rete /rodu!ed &ith >C#s &ere investi8ated and testresults /resented >hile e:/eri9entin8 &ith %resh and hardened !on!rete, 9i:tures !ontainin8recycled concrete a88re8ates in a9ounts o% 43

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(se of building rubbles as recycled aggregates

How)*i + en , , $song en and !uan)Hung + en

*e/art9ent o% Civil En8ineerin8, National Chun8 sin8 Universit$, 2=3, Fuo Fuan8 "oad,ai!hun8 6322@, ai&an, "OC

"e!eived 7 .a$ 23325 a!!e/ted 0= Jul$ 2332 5 #vaila le online 04 #u8ust 2332

Abstract

he a//li!ation o% uildin8 ru le !olle!ted %ro9 da9a8ed and de9olished stru!tures is ani9/ortant issue in ever$ !ountr$ #%ter !rushin8 and s!reenin8, this 9aterial !ould serve asre!$!led a88re8ate in !on!rete # series o% e:/eri9ents usin8 re!$!led a88re8ate o% various!o9/ositions %ro9 uildin8 ru le &as !ondu!ted he test results sho& that the uildin8 ru le

!ould e trans%or9ed into use%ul re!$!led a88re8ate throu8h /ro/er /ro!essin8 Usin8 un&ashedre!$!led a88re8ate in !on!rete &ill a%%e!t its stren8th he e%%e!t &ill e 9ore o vious at lo&er&aterG!e9ent ratios >hen the re!$!led a88re8ate &as &ashed, these ne8ative e%%e!ts &ere8reatl$ i9/roved his is es/e!iall$ true %or the %le:ural stren8th o% the recycled concrete. here!$!led !oarse a88re8ate is the &ea'est /hase at a lo& &aterG!e9ent ratio his e%%e!t &illdo9inate the stren8th o% recycled concrete. his 9e!hanis9 does not o!!ur in re!$!led9ortar he Duantit$ o% re!$!led %ine a88re8ate &ill 8overn the 9ortar stren8th

Aut or !eywords: Buildin8 ru les5 "e!$!led a88re8ates5 .e!hani!al /ro/erties

Porosity of recycled concrete wit substitution of recycledconcrete aggregate

An e-perimental study

*os M. /. '0me1)Sober0n ,

4 Sur H=34 Cd Serdn, Pue la, CP @==23, .e:i!o

"e!eived 1 June 23305 a!!e/ted = .ar!h 2332 #vaila le online 2 .a$ 2332

Abstract

In this /a/er, &e /resent the e:/eri9ental anal$sis o% sa9/les o% recycled concrete ("C) &ithre/la!e9ent o% natural a88re8ate (N#) $ re!$!led a88re8ate ori8inatin8 %ro9 !on!rete ("C#)

he results o% the tests o% 9e!hani!al /ro/erties o% "C &ere used %or !o9/arison &ith tests o%9er!ur$ intrusion /orosi9etr$ (.IP), in &hi!h the distri ution o% the theoreti!al /ore radius,!riti!al /ore ratio, the sur%a!e area o% the !on!rete, threshold ratio and avera8e /ore radius &ere

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#m4.cor*%23m4.cor*mailto:hjchen@mail.ce.nchu.edu.twhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#m4.cor*%23m4.cor*mailto:jmv115@hotmail.comhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit2%23hit2mailto:jmv115@hotmail.comhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#m4.cor*%23m4.cor*http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#hit2%23hit2mailto:hjchen@mail.ce.nchu.edu.twhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-46H5M34-1&_user=10&_coverDate=01%2F31%2F2003&_alid=518808061&_rdoc=21&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6fccb83800dba06ae5cf71fce85d6733#m4.cor*%23m4.cor*

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studied at a8es o% @, 21 and 73 da$s he results sho&ed so9e variation in the /ro/erties o% the"C &ith res/e!t to ordinar$ !on!rete Porosit$ in!reases !onsidera l$ &hen N# is re/la!ed $"C# #dditionall$, a redu!tion in the 9e!hani!al /ro/erties o% the "C is seen !o9/ared &ithordinar$ !on!rete &hen /orosit$ in!reases

Aut or !eywords: Co9/ressive stren8th5 Porosit$5 2ecycled concrete3 2ecycled concrete

a88re8ate5 oun8As 9odulus

Performance of concrete made wit commercially producedcoarse recycled concrete aggregate

!. !. Sagoe)+rentsil , $. #rown and A. H. $aylor

CSI"O Buildin8, Constru!tion and En8ineerin8, P O Bo: =?, i8hett, Vi!toria 4073, #ustralia

"e!eived 43 .ar!h 07775 a!!e/ted 4 Nove9 er 2333 #vaila le online 1 June 2330

Abstract

Per%or9an!e tests have een !arried out %or %resh and hardened /ro/erties o% !on!rete 9ade &ith!o99er!iall$ /rodu!ed !oarse recycled concrete a88re8ate and natural %ine sand est resultsindi!ate that the di%%eren!e et&een the !hara!teristi!s o% %resh and hardened re!$!led a88re8ate!on!rete and natural a88re8ate !on!rete is /erha/s relativel$ narro&er than re/orted %orla orator$ !rushed re!$!led a88re8ate !on!rete 9i:tures -or !on!rete &ithout last %urna!esla8 havin8 si9ilar volu9etri! 9i:ture /ro/ortions and &or'a ilit$, there &as no di%%eren!e at

the =< si8ni%i!an!e level in !on!rete !o9/ressive and tensile stren8ths o% recycled concrete and !ontrol nor9al !on!rete 9ade %ro9 natural asalt a88re8ate and %ine sand >ater a sor/tionrates and !ar onation o% recycled concrete and re%eren!e !on!rete &ere !o9/ara le %or 9osta//li!ations o&ever, the a rasion loss o% re!$!led a88re8ate !on!rete 9ade &ith ordinar$

/ortland !e9ent in!reased $ a out 02< !o9/ared to nor9al !on!rete, &hile the !orres/ondin8dr$in8 shrin'a8e &as a out 2=< hi8her at 0 $ear he ratio o% s/littin8 tensile stren8th to!o9/ressive stren8th &as %ound to e in 8ood a8ree9ent &ith esta lished values derived %oreDuivalent 8rade !on!retes 9ade &ith nor9al &ei8ht natural a88re8ates One $ear test resultsindi!ate that in!re9ental i9/rove9ents in dura ilit$ !hara!teristi!s !an %urther e a!hieved &iththe use o% last %urna!e sla8 !e9ent Enhan!ed %resh and hardened !on!rete /ro/erties o% theinvesti8ated recycled concrete a88re8ate as !o9/ared to a88re8ate derived %ro9 la orator$

!rushed !on!rete arise /ri9aril$ %ro9 i9/roved a88re8ate 8radin8 and Dualit$ a!hieva le in /lant !rushin8 o/erations

Aut or !eywords: #88re8ate5 Blast %urna!e sla85 Co9/ressive stren8th5 *r$in8 shrin'a8e5*ura ilit$5 Per%or9an!e5 2ecycled concrete

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit7%23hit7http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit6%23hit6http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#m4.cor*%23m4.cor*http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4379F4V-4&_user=10&_coverDate=05%2F31%2F2001&_alid=518808061&_rdoc=23&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28d18b995f235c9b38c6bcc4c55cd8df#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-45R7KX2-5&_user=10&_coverDate=08%2F31%2F2002&_alid=518808061&_rdoc=22&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f4f946ad34044c03e561ee743623112b#hit3%23hit3

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2ecycled concrete aggregate and fly as produce concretewit out portland cement

$orben +. Hansen

Buildin8 .aterials a orator$ Buildin8 001 e!hni!al Universit$ o% *en9ar' 2133, $n8 $,*en9ar'

"e!eived 0 #u8ust 0717 Co99uni!ated $ . Idorn #vaila le online 02 -e ruar$ 2334

Abstract

It has een sho&n that !on!rete !an e /rodu!ed entirel$ %ro9 &aste /rodu!ts su!h as recycledconcrete a88re8ates and %l$ ash he recycled concrete 8ains stren8th ver$ slo&l$ /ro a l$due to /ozzolani! rea!tion et&een %l$ ash and !al!iu9 h$dro:ide %ro9 the !e9ent /aste in the

old !on!rete It is su88ested that the /ro!ess 9a$ e used to u/8rade the Dualit$ o% de9olishedand !rushed !on!rete %or %ill or road ase /ur/oses

2ecycled concrete and silica fume ma"e calcium silicatebric"s

$orben +. Hansen a and Henri" &arud a

a Buildin8 .aterials a orator$ e!hni!al Universit$ o% *en9ar' Buildin8 001, *F 2133,$n8 $, *en9ar'

"e!eived 0 *e!e9 er 0712 Co99uni!ated $ . Idorn #vaila le online 02 -e ruar$ 2334

Abstract

>hen old !on!rete is !rushed to !oarse a88re8ate %or /rodu!tion o% ne& !on!rete, a//ro:i9atel$23 &ei8ht /er!ent o% !rusher %ines are 8enerated It has een sho&n that !al!iu9 h$dro:ide %ro9h$drated !e9ent o% su!h %ines rea!ts in the auto!lave &ith sili!eous /arti!les in the %ines to 8ive!al!iu9 sili!ate /rodu!ts Su!h /rodu!ts are si9ilar in nature to sand li9e ri!'s >hen sili!aare 8reatl$ i9/roved It has %urther een sho&n that !rusher %ines %ro9 recycled concrete donot Duali%$ as h$drauli! !e9ents even &hen 8round to !e9ent %ineness

+rus ed aggregate production from centrali1ed combinedand individual waste sources in Hong !ong

/ivian 4. . $am a, 5, and +.M. $am b, ,

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47X8HCC-1YG&_user=10&_coverDate=05%2F31%2F1990&_alid=518808061&_rdoc=24&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=3b8638b4aaa17380d7c6b7e1102e1432#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47XBY17-DM&_user=10&_coverDate=09%2F30%2F1983&_alid=518808061&_rdoc=25&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a95fbe6529cfec97d4bef0b738d59122#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47XBY17-DM&_user=10&_coverDate=09%2F30%2F1983&_alid=518808061&_rdoc=25&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a95fbe6529cfec97d4bef0b738d59122#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#fn1%23fn1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#fn1%23fn1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#fn1%23fn1mailto:v.tam@griffith.edu.auhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#aff2%23aff2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#aff2%23aff2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#cor1%23cor1mailto:bctam@cityu.edu.hkmailto:bctam@cityu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J90VYV-1&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=1&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f56ec3c3cd57a28b8715a4bcb1b124a5#cor1%23cor1mailto:v.tam@griffith.edu.auhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47XBY17-DM&_user=10&_coverDate=09%2F30%2F1983&_alid=518808061&_rdoc=25&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a95fbe6529cfec97d4bef0b738d59122#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47XBY17-DM&_user=10&_coverDate=09%2F30%2F1983&_alid=518808061&_rdoc=25&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a95fbe6529cfec97d4bef0b738d59122#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47XBY17-DM&_user=10&_coverDate=09%2F30%2F1983&_alid=518808061&_rdoc=25&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a95fbe6529cfec97d4bef0b738d59122#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47X8HCC-1YG&_user=10&_coverDate=05%2F31%2F1990&_alid=518808061&_rdoc=24&_fmt=summary&_orig=search&_cdi=5562&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=3b8638b4aaa17380d7c6b7e1102e1432#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-47X8HCC-1YG&_user=10&_coverDate=05%2F31%2F1990&_alid=518808061&_rdoc=24&_fmt=summary&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aS!hool o% En8ineerin8, ri%%ith Universit$, P.B =3 old Coast 9ail Centre, Kld 7@2?,#ustralia

*e/art9ent o% Buildin8 and Constru!tion, Cit$ Universit$ o% on8 Fon8, 14 at Chee #venue,Fo&loon, on8 Fon8

"e!eived 0= *e!e9 er 23365 revised 4 Nove9 er 233=5 a!!e/ted 03 *e!e9 er 233=

#vaila le online 0@ -e ruar$ 233?

Abstract

O&in8 to the !o9/rehensive uildin8 redevelo/9ent /ro8ra99es in on8 Fon8, thereis a hu8e volu9e o% !on!rete &aste 8enerated that &ill soon e:haust all the availa le land%illareas #s su!h, re!$!led a88re8ate is advo!ated o&ever, the use o% re!$!led a88re8ate has

een !on%ined to lo&er 8rade a//li!ations until no&, su!h as the lo&er la$ers o% a /ave9entstru!tures, e 8 , !a//in8 and su ase he 9ain reason is the varia le ehaviour o% re!$!leda88re8ates !olle!ted %ro9 di%%erent sour!es to e !rushed in a !entralized re!$!lin8 /lant his

/a/er a//lies so9e international standards to !lassi%$ re!$!led a88re8ates #88re8ates &ere!olle!ted %ro9 t&elve sour!es, in!ludin8 03 %ro9 de9olition sites (Sa9/les 0 03), one %ro9

uen .un #rea 41 !entralized re!$!lin8 /lant (Sa9/le 00) and one %ro9 ordinar$ vir8ina88re8ate (Sa9/le 02) -ro9 test results, Sa9/le ?, a'in to Sa9/le 02 (vir8in a88re8ate), &as%ound to e suita le %or all t$/es o% !onstru!tion a//li!ations, &hile Sa9/les 2 and 7 &ere!o9/letel$ unsuita le as recycled concrete a88re8ates %or an$ a//li!ation 8rade Sa9/le 00( uen .un #rea 41 !entralized re!$!lin8 /lant) &as %ound onl$ suita le %or non stru!turala//li!ations, su!h as ase !ourse and %ill It is !on!luded that the di%%erent sour!es o% re!$!leda88re8ate should /re%era l$ e se/aratel$ !rushed and !lassi%ied rather than /ro!essed in a!o9 ined %or9 !entrall$ &hi!h &ill lo&er its overall Dualit$ and li9it its a//li!ation

!eywords: "e!$!led a88re8ate5 Con!rete5 Classi%i!ation s$ste9s5 Constru!tion

S ear strengt of recycled concrete beams

#el n 'on16le1)7onteboa , a , and 7ernando Mart8ne1)Abella 5, a ,

aS!hool o% Civil En8ineerin8, *e/art9ent o% Constru!tion En8ineerin8 o% the Universit$ o% #CoruLa, E S I Ca9inos, Canales, Puertos, Ca9/us ElviLa sGn, 0=3@0 a CoruLa, S/ain

"e!eived @ Januar$ 233=5 revised 04 Nove9 er 233=5 a!!e/ted 03 *e!e9 er 233= #vaila leonline 23 -e ruar$ 233?

Abstract

his /a/er re/orts on the shear ehaviour o% !on!rete 9ade &ith recycled concrete a88re8ates ests have een /er%or9ed on re!$!led a88re8ates and on t&o !on!rete 9i:es(!onventional !on!rete and recycled concrete &ith =3< o% re!$!led !oarse a88re8ates) -orever$ !on!rete, %our rein%or!ed ea9s &ith di%%erent a9ount o% transverse rein%or!e9ent &ere

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9ade and &ere tested to %ailure he results sho&ed that &hereas the de%le!tions and theulti9ate loads &ere little a%%e!ted $ the di%%erent t$/es o% !on!retes, in recycled concrete

ea9s, !ra!'in8 &as /re9ature E:/eri9ental results &ere !o9/ared usin8 theoreti!al 9odels.odi%ied Co9/ression -ield heor$ and !urrent !odes Both /redi!ted the shear ehaviour o%the ne& recycled concrete &ell

!eywords: "e!$!led a88re8ates5 2ecycled concrete 5 .e!hani!al /ro/erties5 Stru!tural ehaviour5 Shear ehaviour

+ompressive failure in concrete of recycled aggregate byacoustic emission

$a"es i 4atanabe a, , , Saya"a &is ibata a, + i"anori Has imoto a and Masayasu 9 tsu b

a

Universit$ o% o'ushi9a, *e/art9ent o% Civil and Environ9ental En8ineerin8, 2 0 .ina9iJosanMi9a, o'ushi9a @@3 1=3?, Ja/an raduate S!hool o% S!ien!e and e!hnolo8$, Fu9a9oto Universit$, 2 47 0 Furo'a9i,Fu9a9oto 1?3 1===, Ja/an

"e!eived 0 Nove9 er 233=5 revised 03 Januar$ 233?5 a!!e/ted 43 #/ril 233? #vaila leonline 2= Jul$ 233?

Abstract

-or re!$!lin8 !on!rete, the use o% re!$!led a88re8ate has een e:tensivel$ studied in Ja/an It is&idel$ re!o8nized that !o9/ressive stren8th in !on!rete o% re!$!led a88re8ate is lo&er thannor9al !on!rete &ith the sa9e &ater to !e9ent ratio, e!ause %ra!ture /ro!ess in !on!rete o%re!$!led a88re8ate is not identi!al to nor9al !on!rete In order to !lari%$ !hara!teristi!s o%%ra!ture /ro!ess in a88re8ate recycled concrete, a!ousti! e9ission (#E) te!hniDue is a//liedto dete!t 9i!ro !ra!'in8 in !on!rete under !o9/ression # 9ethod to i9/rove the stren8th o%!on!rete o% re!$!led a88re8ate &as investi8ated he test &as /er%or9ed under oth9onotonous and !$!li! loadin8s -ro9 #E /ara9eters, it is %ound that !ra!'in8 ehaviors in!on!rete o% re!$!led a88re8ate %airl$ di%%er %ro9 that o% nor9al !on!rete Still it is !on%ir9edthat the stren8th !ould e re!overed $ vi rator$ !o9/a!tion

!eywords: "e!$!led a88re8ate5 #!ousti! e9ission5 #E /ara9eter5 Vi ration

+ emical mineralogical c aracterisation of coarse recycledconcrete aggregate

M.+. Limbac iya a, , , ;. Marrocc ino b and A. !oulouris a

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J9MST6-2&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=2&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=c3b63fe8b6fc4456fd99a93faa4e99cd#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4J9MST6-2&_user=10&_coverDate=04%2F30%2F2007&_alid=518808061&_rdoc=2&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=c3b63fe8b6fc4456fd99a93faa4e99cd#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#cor1%23cor1mailto:watanabe@ce.tokushima-u.ac.jphttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#aff2%23aff2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#cor1%23cor1mailto:m.limbachiya@kingston.ac.ukhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#aff2%23aff2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#aff1%23aff1mailto:m.limbachiya@kingston.ac.ukhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4JKJT0V-1&_user=10&_coverDate=12%2F31%2F2007&_alid=518808061&_rdoc=4&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=82ff308b34723d5159f328524f2096df#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&_rdoc=3&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=69453c19950684a1523a22e1f43e9c7c#hit2%23hit2mailto:watanabe@ce.tokushima-u.ac.jphttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KGPPBC-1&_user=10&_coverDate=03%2F31%2F2007&_alid=518808061&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a-a!ult$ o% En8ineerin8, Fin8ston Universit$, Penrh$n "oad, Fin8ston u/on ha9es, F 0 2EE,UF

*e/art9ent o% Earth S!ien!es, Universit$ o% -errara, Via Sara8at 0, 66 033, -errara, Ital$

#!!e/ted 00 Januar$ 233? #vaila le online 27 .ar!h 233?

Abstract

he !onstru!tion industr$ is no& /uttin8 8reater e9/hasis than ever e%ore on in!reasin8re!$!lin8 and /ro9otin8 9ore sustaina le &aste 9ana8e9ent /ra!ti!es In 'ee/in8 &ith thisa//roa!h, 9an$ se!tors o% the industr$ have a!tivel$ sou8ht to en!oura8e the use o% recycledconcrete a88re8ate ("C#) as an alternative to /ri9ar$ a88re8ates in !on!rete /rodu!tion heresults o% a la orator$ e:/eri9ental /ro8ra99e ai9ed at esta lishin8 !he9i!al and9ineralo8i!al !hara!teristi!s o% !oarse "C# and its li'el$ in%luen!e on !on!rete /er%or9an!e arere/orted in this /a/er Co99er!iall$ /rodu!ed !oarse "C# and natural a88re8ates (0? 6 99size %ra!tion) &ere tested "esults o% + ra$ %luores!en!e (+"-) anal$ses sho&ed that ori8inal

sour!e o% "C# had a ne8li8i le e%%e!t on the 9aMor ele9ents and a !o9/ara le !he9i!al!o9/osition et&een re!$!led and natural a88re8ates + ra$ di%%ra!tion (+"*) anal$ses resultsindi!ated the /resen!e o% !al!ite, /ortlandite and 9inor /ea's o% 9us!oviteGillite in re!$!leda88re8ates, althou8h the$ &ere dire!tl$ /ro/ortioned to their ori8inal !o9/osition hein%luen!e o% 43

8/12/2019 Papers on C&D Wastes

9/35

to strin8ent Dualit$ !ontrol standards that are usuall$ ta'en %ro9 s/e!i%i!ations %or ra& 8ranularvir8in 9aterials his /a/er /resents a re!ent stud$ on the /ro/erties o% !on!rete /avin8 lo!'s

/re/ared &ith recycled concrete a88re8ates that are !onta9inated $ 9aterials (tiles, !la$ ri!'s, 8lass, &ood) !o99onl$ %ound in the !onstru!tion and de9olition &aste he densit$,!o9/ressive stren8th, tensile s/littin8 stren8th, &ater a sor/tion value, a rasion resistan!e, s'idresistan!e and so9e dura ilit$ /ara9eters &ere 9easured %or la orator$ /re/ared sa9/les he

results sho& that it is %easi le to allo& a hi8her level o% !onta9ination in the recycled concrete a88re8ates %or 9a'in8 the !on!rete /rodu!ts "e!o99endations are 9ade on ho& thes/e!i%i!ations !ould e revised to %a!ilitate a &ider a//li!ation o% re!$!led a88re8ates that is!onta9inated $ %orei8n 9aterials

!eywords: 2ecycled concrete a88re8ate5 Crushed ri!'5 Crushed tile5 Crushed &aste 8lass5>ood !hi/s5 Con!rete /rodu!ts

&ew approac in measuring water absorption of recycledaggregates

/ivian 4. . $am a, , ,

8/12/2019 Papers on C&D Wastes

10/35

Paving bloc"s made wit recycled concrete aggregate andcrus ed clay bric"

+ i Sun Poon , and Di-on + an

*e/art9ent o% Civil and Stru!tural En8ineerin8, he on8 Fon8 Pol$te!hni! Universit$, un8o9, Fo&loon, on8 Fon8

"e!eived 26 June 23365 revised 7 *e!e9 er 23365 a!!e/ted 40 Januar$ 233= #vaila leonline 24 .ar!h 233=

Abstract

Cla$ ri!' 8enerated %ro9 !onstru!tion sites is usuall$ delivered to land%ills %or dis/osal >iththe li9ited land%ill s/a!e in on8 Fon8, there is an i99ediate need to e:/lore the /ossi le use

o% !rushed !la$ ri!' as a ne& !ivil en8ineerin8 9aterial In on8 Fon8, 8overn9ents/e!i%i!ations /ro9ote the use o% /avin8 lo!'s 9ade &ith @3 033< recycled concrete a88re8ate in order to %a!ilitate the re!$!lin8 o% !onstru!tion and de9olition (C *) &aste his

/a/er /resents a re!ent stud$ at the on8 Fon8 Pol$te!hni! Universit$ on the investi8ation o% lendin8 recycled concrete a88re8ate and !rushed !la$ ri!' as a88re8ates in the /rodu!tiono% /avin8 lo!'s

he results indi!ated that the in!or/oration o% !rushed !la$ ri!' redu!ed the densit$,!o9/ressive stren8th and tensile stren8th o% the /avin8 lo!'s *ue to the hi8h &ater a sor/tiono% !rushed !la$ ri!' /arti!les, the &ater a sor/tion o% the resultin8 /avin8 lo!'s &ere hi8herthan that o% the /avin8 lo!'s that did not in!or/orate !rushed !la$ ri!' #lthou8h it &as %ound

that !rushed !la$ ri!' i9/aired the Dualit$ o% the resultin8 /avin8 lo!'s to a !ertain e:tent, the /avin8 lo!'s usin8 =3< !rushed !la$ ri!' 9et the 9ini9u9 reDuire9ents s/e!i%ied $#SGNQS 66== and E >B o% on8 Fon8 ( rade B) %or /edestrian areas -urther9ore, it &as%easi le to /rodu!e /avin8 lo!'s /re/ared &ith 2=< !rushed !la$ ri!' that satis%ied the!o9/ressive stren8th reDuire9ent %or /avin8 lo!'s ( rade B) /res!ri ed $ E >B o% on8Fon8 %or tra%%i!'ed area

!eywords: Constru!tion and de9olition &aste5 2ecycled concrete a88re8ates5 Crushed !la$ ri!'5 Pavin8 lo!'s

7easible use of recycled concrete aggregates and crus edclay bric" as unbound road sub)base

+ i Sun Poon , and Di-on + an

*e/art9ent o% Civil and Stru!tural En8ineerin8, he on8 Fon8 Pol$te!hni! Universit$, un8o9, Fo&loon, on8 Fon8

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#cor1%23cor1mailto:cecspoon@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-7&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=9&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=7c8d94ccd7e1d4059984091810721ba2#cor1%23cor1mailto:cecspoon@polyu.edu.hkmailto:cecspoon@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-7&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=9&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=7c8d94ccd7e1d4059984091810721ba2#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-7&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=9&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=7c8d94ccd7e1d4059984091810721ba2#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit1%23hit1mailto:cecspoon@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4FSCV75-6&_user=10&_coverDate=10%2F31%2F2006&_alid=518808061&_rdoc=8&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=19e15f0dbcfe315a792e452b1b653727#hit2%23hit2

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"e!eived 26 June 23365 revised 7 *e!e9 er 23365 a!!e/ted 40 Januar$ 233= #vaila leonline 24 .ar!h 233=

Abstract

# stud$ &as re!entl$ !ondu!ted at the on8 Fon8 Pol$te!hni! Universit$ to investi8ate the /ossi ilit$ o% usin8 recycled concrete a88re8ates and !rushed !la$ ri!' as a88re8ates inun ound su ase 9aterials he results sho&ed that the use o% 033< recycled concretea88re8ates in!reased the o/ti9u9 9oisture !ontent and de!reased the 9a:i9u9 dr$ densit$ o%the su ase 9aterials !o9/ared to those o% natural su ase 9aterials .oreover, there/la!e9ent o% recycled concrete a88re8ates $ !rushed !la$ ri!' %urther in!reased theo/ti9u9 9oisture !ontent and de!reased the 9a:i9u9 dr$ densit$ his &as 9ainl$ attri utedto the lo&er /arti!le densit$ and hi8her &ater a sor/tion o% !rushed !la$ ri!' !o9/ared tothose o% recycled concrete a88re8ates he CB" values (unsoa'ed and soa'ed) o% the su ase9aterials /re/ared &ith 033< recycled concrete a88re8ates &ere lo&er than those o% naturalsu ase 9aterials he CB" values %urther de!reased as the re/la!e9ent level o% recycled

concrete a88re8ates $ !rushed !la$ ri!' in!reased Nevertheless, the soa'ed CB" values %orall re!$!led su ases &ere 8reater than 43

8/12/2019 Papers on C&D Wastes

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&as dra%ted $ the .inistr$ o% Constru!tion o% Ja/an in 077? o&ever, it has hardl$ eena//lied to a!tual stru!tures e!ause o% the hi8h !ost %or /rodu!tion

he authors have develo/ed a /rodu!tion 9ethod %or recycled concrete that is di%%erent %ro9that o% the dra%t he re!$!led !oarse a88re8ate is /rodu!ed $ a si9/le asse9 led s$ste9 o%eDui/9ent, and is 9i:ed &ith ordinar$ !oarse a88re8ate to ensure the Dualit$ reDuired o%

stru!tural !on!rete In this resear!h, !hara!teristi!s o% stren8th, dura ilit$, %ire resistant /ro/ert$,stru!tural /er%or9an!e, and &or'a ilit$ o% the recycled concrete are investi8ated hene!essar$ data %or esta lishin8 a 9i: /ro/ortion desi8n and a Dualit$ !ontrol 9ethod areo tained In addition, a /rodu!tion 9ethod %or the recycled concrete &hi!h has no use o% a

at!hin8 /lant is /ro/osed Eventuall$, the e!ono9i!s and environ9ental loads o% the develo/ed9ethod are evaluated and its e%%e!tiveness is !on%ir9ed

!eywords: #88re8ate5 .i:ture /ro/ortionin85 2ecycled concrete 5 >aste 9ana8e9ent

he use o% re!$!led a88re8ate in !on!rete in on8 Fon8

+ i)Sun Poon , a , and Di-on + an a,

a*e/art9ent o% Civil and Stru!tural En8ineerin8, he on8 Fon8 Pol$te!hni! Universit$, un8o9, Fo&loon, on8 Fon8

"e!eived 21 #/ril 233?5 revised 22 June 233?5 a!!e/ted 22 June 233? #vaila le online 0#u8ust 233?

Abstract

In 2336, over 23 9illion tonnes o% !onstru!tion and de9olition (C *) &astes &ere 8enerated inon8 Fon8 Sin!e the lo!al land%ills &ill e saturated in a out 1 $ears, it is i9/ortant to %ind a

via le &a$ to reuse these &aste 9aterials as to alleviate the de9and on /u li! %ill !a/a!it$ Inorder to ta!'le the /ro le9, the on8 Fon8 8overn9ent has set u/ a te9/orar$ re!$!lin8%a!ilit$ in on8 Fon8 in 2332 %or /rodu!in8 di%%erent sizes o% re!$!led a88re8ate %or use invarious !onstru!tion 9aterials his /a/er su99arizes the details o% the !onstru!tion o% the

on8 Fon8 >etland Par' &hi!h !onsu9ed a//ro:i9atel$ 06,433 9 4 o% !on!rete /re/ared &ithre!$!led a88re8ate o&ever, as o% toda$, the re!$!led a88re8ate ein8 reused is strin8entl$restri!ted to recycled concrete a88re8ate ("C#) he use o% other &astes su!h as ri!' and!era9i! tile a88re8ate is /rohi ited 9o9entaril$ even the !o9 ination o% ri!'s and !era9i!tiles !onstitutes a lar8e /ortion o% the C * &astes In order to %a!ilitate the &ider use o% theinert /ortion o% the C * &astes, a /reli9inar$ stud$ &as !ondu!ted to investi8ate the

/ossi ilit$ o% usin8 !rushed ri!' and tile a88re8ate derived %ro9 !onstru!tion and de9olition&aste strea9 as a re/la!e9ent o% %ine a88re8ate in !on!rete he e%%e!ts o% the use o% %ine!rushed ri!' and tile a88re8ate as a 23 &t < re/la!e9ent o% natural sand on the %resh and9e!hani!al /ro/erties are /resented

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0mailto:cecspoon@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0mailto:cechancw@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#hit2%23hit2mailto:cechancw@polyu.edu.hkmailto:cecspoon@polyu.edu.hkhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit6%23hit6http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit5%23hit5http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit4%23hit4http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit3%23hit3http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2G-4KV8TBB-1&_user=10&_coverDate=09%2F08%2F2006&_alid=518808061&_rdoc=10&_fmt=summary&_orig=search&_cdi=5702&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=53a95ca79431bceba501fd83afe0996e#hit1%23hit1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4KJ7504-1&_user=10&_coverDate=08%2F01%2F2006&_alid=518808061&_rdoc=11&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=be903bfc1309071bf091454967b31091#implicit0%23implicit0

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!eywords: Crushed !la$ ri!'5 Crushed tile5 Constru!tion and de9olition &aste5 "e!$!leda88re8ate

;ffects of recycled concrete aggregates on properties of

asp alt concreteSumeda Paranavit ana a and Abbas Mo a=erani b, ,

aVi!"oads, #ustralia S!hool o% Civil Che9i!al En8ineerin8, ".I Universit$, PO Bo: 26@?V, .el ourne4330, #ustralia

"e!eived 23 Januar$ 23365 a!!e/ted 0 *e!e9 er 233= #vaila le online 4 -e ruar$ 233?

Abstract2ecycled concrete a88re8ates ("C#) are /rodu!ed $ !rushin8 de9olished !on!rete

ele9ents "C# di%%er %ro9 %resh a88re8ates due to the !e9ent /aste atta!hed to the sur%a!e o%the ori8inal natural a88re8ates a%ter the /ro!ess o% re!$!lin8 his hi8hl$ /orous !e9ent /asteand other !onta9inations !ontri ute to the lo&er /arti!le densit$ and hi8her /orosit$, variationin the Dualit$ o% the "C# and the hi8her &ater a sor/tion his /a/er /resents so9e o% theresults o% an investi8ation on the /ossi le a//li!ation o% "C# in as/halt !on!rete It &as %oundthat all the volu9etri! /ro/erties (e:!e/t the /er!enta8e o% air voids), resilient 9odulus and!ree/ values o% as/halt s/e!i9ens !ontainin8 "C# as !oarse a88re8ates &ere relativel$ lo&er!o9/ared &ith the values %ound %or si9ilar s/e!i9ens 9ade &ith onl$ %resh a88re8ates So9e

o% these 9easured /ro/erties &ere &ithin the a!!e/ta le re!o99ended li9its, %or the "C#sa9/le used in this stud$

!eywords: 2ecycled concrete a88re8ates5 "e!$!led 9aterials5 >aste 9ana8e9ent5Constru!tion and de9olition &aste5 #s/halt 9i: desi8n5 Pave9ent 9aterials5 Crusheda88re8ates5 Volu9etri! and 9e!hani!al /ro/erties

$ e cause and influence of self)cementing properties of finerecycled concrete aggregates on t e properties of unboundsub)base+ i)Sun Poon , a , , iao a and Di-on + an a

a*e/art9ent o% Civil and Stru!tural En8ineerin8, he on8 Fon8 Pol$te!hni! Universit$, un8o9, Fo&loon, on8 Fon8

"evised 1 *e!e9 er 233= #vaila le online 23 -e ruar$ 233?

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Date=07%2F31%2F2006&_alid=518808061&_rdoc=12&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=60c8c65f9c4c1758c4e4ebd5cc35a0fc#cor1%23cor1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4J624KT-1&_user=10&_coverDate=07%2F31%2F2006&_alid=518808061&_rdoc=12&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=60c8c65f9c4c1758c4e4ebd5cc35a0fc#hit2%23hit2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4J624KT-1&_user=10&_coverDate=07%2F31%2F2006&_alid=518808061&_rdoc=12&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=60c8c65f9c4c1758c4e4ebd5cc35a0fc#aff1%23aff1http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDX-4J624KT-1&_user=10&_coverDate=07%2F31%2F2006&_alid=518808061&_rdoc=12&_fmt=summary&_orig=search&_cdi=5994&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=60c8c65f9c4c1758c4e4ebd5cc35a0fc#aff2%23aff2http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4J9N0PD-5&_user=10&_coverDate=12%2F31%2F2006&_alid=518808061&_rdoc=13&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d66150356b9bf39a52a9fd5f3ebfa3ef#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4J9N0PD-5&_user=10&_coverDate=12%2F31%2F2006&_alid=518808061&_rdoc=13&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d66150356b9bf39a52a9fd5f3ebfa3ef#implicit0%23implicit0http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VFR-4J9N0PD-5&_user=10&_coverDate=12%2F31%2F2006&_alid=518808061&_rdoc=13&_fmt=summary&_orig=search&_cdi=6017&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d66150356b9bf39a52a9fd5f3ebfa3ef#implicit0%23implicit0

8/12/2019 Papers on C&D Wastes

14/35

Abstract

he use o% !oarse recycled concrete a88re8ates (C"C#) in !onMun!tion &ith %ine recycledconcrete a88re8ates (-"C#) as su ase 9aterials has een &idel$ studied #lthou8h resear!hresults indi!ate that it is %easi le to e9/lo$ oth C"C# and -"C# as 8ranular su ase, thein%luen!e o% the unh$drated !e9ent in the adhered 9ortar o% the "C# on the /ro/erties o% thesu ase 9aterials has not een thorou8hl$ studied enerall$, it is 'no&n that the stren8th o%the su ase 9aterials /re/ared &ith "C# in!reases over ti9e o&ever, this 9e!hanis9,'no&n as the sel% !e9entin8 /ro/erties, is not &ell understood and is elieved to e 8overned $the /ro/erties o% the %ine /ortion o% the "C# ( = 99) his /a/er /resents an investi8ation onthe !ause o% the sel% !e9entin8 /ro/erties $ 9easurin8 + ra$ di%%ra!tion /atterns, / values,!o9/ressive stren8th and /er9ea ilit$ o% various size %ra!tions o% the -"C# o tained %ro9 a!o99er!iall$ o/erated !onstru!tion and de9olition &aste re!$!lin8 /lant heir in%luen!e on theoverall su ase 9aterials &as deter9ined he results indi!ate that the size %ra!tions o% 3 0=and 3 4 3 ? 99 (a!tive %ra!tions) &ere 9ost li'el$ to e the /rin!i/al !ause o% the sel%!e9entin8 /ro/erties o% the -"C# o&ever, the e%%e!ts on the /ro/erties o% the overall "C#su ase 9aterials &ere 9ini9al i% the total Duantit$ o% the a!tive %ra!tions &as li9ited to a

threshold $ &ei8ht o% the total %ine a88re8ate

9ptimi1ation on proportion for recycled aggregate inconcrete using two)stage mi-ing approac

/ivian 4. . $am a, , , +.M. $am b and . 4ang c

a ri%%ith S!hool o% En8ineerin8, old Coast Ca9/us, ri%%ith Universit$ P.B=3 old Coast.ail Centre, Kld 7@2?, #ustralia

*e/art9ent o% Buildin8 and Constru!tion, Cit$ Universit$ o% on8 Fon8, 14 at Chee #venue,

Fo&loon, on8 Fon8!*e/art9ent o% Co9/uter S!ien!e, sin8hua Universit$, China

"e!eived 2@ Se/te9 er 233=5 revised 2@ -e ruar$ 233?5 a!!e/ted 40 .a$ 233? #vaila leonline 2= Se/te9 er 233?

Abstract

2ecycled aggregate ("#) is &ell a!'no&led8ed havin8 a /oorer Dualit$ due to its hi8her /orosit$ resulted %ro9 !e9ent 9ortar re9ains atta!hin8 to its sur%a!e that ha9/ers the re!$!lin8rate o% !on!rete &aste .an$ /revious resear!hes re!orded redu!tion in stren8th %or !on!rete9ade &ith "# #s a result, the use o% "# is 9ainl$ !on%ined to lo& 8rade a//li!ations a9 etal R a9 > V, ao +-, a9 C. .i!ro stru!tural anal$sis o% recycled aggregate !on!rete

/rodu!ed %ro9 t&o sta8e 9i:in8 a//roa!h Ce9 Con!r "es 233=54=(?);007= 234 /ro/osed at&o sta8e 9i:in8 a//roa!h ( S.#) %or i9/rovin8 the stren8th o% recycled aggregate !on!rete ("#C), $ testin8 9i:es &ith u/ to 43< "# re/la!e9ent his /a/er e:tends a9 etal s &or' (233=) $ e:/lorin8 "# su stitutions ran8in8 %ro9 3< to 033< and !o9/ares their

/er%or9an!e &ith the traditional 9i:in8 /ro!edure Based u/on the e:/eri9ental &or's,i9/rove9ents on stren8th and ri8idit$ o% "#C usin8 S.# &ere !o9/ared &ith those o%

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