BS 1881-PART-111 CONCRETE Method Forn Normal Curing of Test

5/24/2018 BS 1881-PART-111 CONCRETE Method Forn Normal Curing of Test

http:///reader/full/bs-1881-part-111-concrete-method-forn-normal-curing-of-te

BSI BSmlB81: P A R T U L L L 83 l b 2 4 b b 9 0 0 0 4 4 7 8 4 - -~~~-BS 1881 :Part 11 : 198UDC 666.972.017 :69132 :620.1

I ihm publicationmay& phQtoc0piedperrntrwon n wvriting ol BSI. _-

British StandardTesting concretePart 111. Method of normal curing of t es t specimens (20 O C method)

Essais du bBtonPart ie 1 11. MBthode de conservation normales des prouvettes (mthode 20 CPrfverfahren r BetonTeil 11 1. Verfahren zur normaen Nachbehandluna von Probekrpern 20 OC-Verfahren)ForewordThis Part of this Br itish Standard, prepared under thedirection of the Cement, Gypsum. Aggregates and QuarryProducts Standards Committee, i s a revision of 2.5, 2.6,4.5,4.6,6.6, and 6.7 of BS 1881 :Part 3 : 1970. Togetherwith Parts 108. 109, 110. 112 and 113, this Part ofBS 1881 superredes BS 1881 : Part 3 : 1970. which i swithdrawn.This Part describes t h e method of normal curing of cubes,beams and cylinders a t 20 C. Methods for acceleratedcuring of cubes are given in BS 1881 : Pa r t 112 and themethod foi c i r ing no:fines cubes ir given in BS 1881 :Part 113. The distinction between specimens cured in thelaboratory and on site, included in the 1970 edition,has been removed.For the control of temperature conditions n testinglaboratories situated in tropical climates a mid point of27 O C has been internationally recommended. When testsspecified in this standard are carried out in such climates,therefore, i t s suggested that a temperature mid point of27 O C shouldbe adopted, subject to the same tolerancesas those laid down in the relevant clauses of the standardfor use in temperate climates, and the fact reported.I f mist curingof com ete strength est specimens i s to beused as an alternative to the method given in this Part, i t sessential that t h e method used can be shown to giveequivalent results to those obtained from testing tank curedspecimens. The method of mist curing used shouldb bazdOn ni ri ng in an atmosphere with a relative humidity ofover 95 %.NOTE. T he high humidity required in moist a i r curing rooms i snormally produced by spraying water as a lin e aerosol. The b a c .terium L0ggionc/ /8pncumophi /a t widespread in nature and IIpresent i n the water systems of many build ings. Scale in pipewo rkand chemical nutrients in the water supply may encourage growtho f this oqpnism which multipl ies between 20 'C and about 45 "C.Inhbling infected aerosols Is a known route lor ransmission 01Lcgionnaim diseaw. It it t he do re advisable to maintain coldwater supplies b e lo w2 0 .C where possible a n d to siore hot water&ow 60 C, Cold watw supplies may b e disinlecied by chlo rinationto at I t a t 5 mglL fita chlorine. Regular periodic checking (or lhepescnce of Lrgionrlk species in industrial water supplies s asensible precwtion.Compliance with a British Standard does not of itself conferimmunity from legal obligations.British Standards Institution

1. scopeThis Part of this British Standard describes the method ofnormal curingof concrete specimens (cubes, beams orcylinders made in accordance wi th Parts 108, 109 and 110of this British Standard) a t 20 O C for strength tes ts a t agesof 1 day and over.NOTE. This titles of the publi cations referred to in this standard alisted on the inside back page.2. DefinitionsFor the purposes of this Part of this Brit ish Standard,the definitions given in BS 5328 and 8s 1881 : Part 101apply.3. Apparatus3.1 C urhg rank. A curing tank constructed from anymaterial which is of adequate strength and wi ll resistcorrosion. The internal dimensions of the tank shall beappropriate for the number and size of the specimens to baccommodated, shall permit adequate circulation of waterand shall be such that specimens can be easily removed.The tank shall contain clean water which shall be replaceda t least once a month. At any point in the tank wherespecimens are stored the temperature shall be 20 f 2 rC.NOTE. In order to achieve this temperature cont rol it may benecessary to provide the tank with a lid andlor insulation andlor awater cooling system i n additi on to the water heating system.3,2 Thennometer, suitable for measuring maximum andminimum moist air and water curing temperatures.4. ProcedureImmediatelyafter making specimens (see BS 1881 :Part 10109 or 110 as appropriate) store them in a place f ree fromvibration end in conditions which wil l prevent loss of

COPYRIGHT ritish Standards Institution on ERC Specs and StandardsCOPYRIGHT British Standards Institution on ERC Specs and StandardsLicensed by Information Handling Services



Licensed by Information Handling ServicesLicensed by Information Handling Services~.BSI B S * L B B L PART*LLL 83

BS 1881 : Part 111 : 1983

inoisture. If it i s necessary to move t h e specimens t q her i lace of torage, move them in their moulds ensuring noloss of connete. Store the specimens either:

i a ) in an atmosphere wi th a relative humidity of not lessthan90% in a moist air curing room or a cabinet: orb) under damp matting of any other suitable dampmaterial wrapped completely wi th polyethylene orother impervious sheeting.

NOTE. The preferred method for storing mi me n s s thatdctcribcd in ( 0.Whichever methodof moist air storage i s used, maintain thetemperature of the specimens a t 20 f 6 O C if the specimensare to be tested a t an age of 7 days or more, or a t 20 f 2 O Cif he specimens are to be tested a t an earlier age,Demould specimens t o be tested a t 24 h just before testing.Demould specimens to be tested at greater ages within t hepcriod 16 h to 28 h af ter the addition of water to the otherconstituents n the mix unles the concrete has no t achievedsufficient strength to enable specimens to be demouldedduring this period. In such cases, delay demoulding for afurther 24 h. During this further period, continue thestorage of the specimens in h e moist air conditions.Mark each specimen clearly and indelibly wi th anidentification number or code, Unless required for test nt24 h, either submerge the specimens immediately in thecuring tank or immediately prepare them for transportingto another location. Keep a l l specimens which areimmediately transferred o t h e curing tank submerged andremove them just before testing unless i t s necessary totransport them to another location for testing.Immediately after removal from the moulds or from thecuring tank, pack specimens to be transported n such a wayas to prevent any significant change in moisture content.NOTE. This mny ta bchlwedcom pament t l ined with we\ bit or other suitable material.After filling, seal each box or enclose it in polyethyleiie orother impervious sheeting.Alternatively, the specimens may be packed in damp sandor In wet sacks and enclosed in a polyethylene bag.Store the transported specimens in thecuring tank for notless than 24 h before the time of testing. This transfer ofspecimens may take place a t any time between demouldingof the specimens and 24 h before the time of testing but itshall be effected ln as short a time as i s practicable.I n order to provide adequate circulation of water and tofacilitate the removalof the specimens from the curing tankensure t h a t there i s a t least 15mm of water horizontallybeween specimens and between specimens and the sides ofthe tank. Continue t he curing in water as long as possibleup to the time of testing.Record t h e daily maximum and minimum moist air andwater curing temperatures using either maximum and

using rpscial boxer having

minimum thermometers or continuous recordinginstruments.5. Age of t e s t specimensTests shall be carried out within the following toleranceson the ages for testing.

f 30 min for ages up to and including 30 hi 2 h for ages above30h and up to and including 100 hf 8 h for ages above 100 h and up to and including60 daysf 1 day for ages above60 days.

The ages shall be cakulated from the time of adding thewater to the other materials in the concretemix.N@TE1, Preferred g s for testing are 1,2,3.7,14 and 28 days,13 and 26 weeks and 1 year.NOTE 2. If the test mltl re used to canpare the performance ofdif ferent testing mechiner closer tolerancesmay be appropriate.6. Report6.1 General. The repott shall affirm that the specimenswere cured in accordance with this Part of this BritishStandard. The report shall state whether or not a certificateof sampling and specimen preparation s available.If available. a copy of the certificate shall be provided.6.2 Information to m included n t h e report6.2.1 Manatow informat ion. The following informationshall be included n the t es t report:

a) identification number or codes of specimens;(b) location of moist air curing;(c) method of moist air curing;(d) period of moist air curing;(e) maximum and minimum moist air and water curingtemperatures;(f) certificate that curing has been carried out inaccordance with this Part of this standard.

6.2.2 Optional information. I f requested the followinginformation shallbe included n the test report:(a) time of adding the water to the other materials inthe concrete mix;(b) time of making specimens;(c) time of immersion of specimens in curing tanks).it applicable:(d) time of removal of specimens from curing tanks),if applicable:(e) temperature record during moist air curing;(1) temperature record during water curing;g) age(s) at which specimens are to be tested.

- - .

COPYRIGHT ritish Standards Institution on ERC Specs and StandardsLicensed by Information Handling ServicesCOPYRIGHT British Standards Institution on ERC Specs and StandardsLicensed by Information Handling Services



BSI BS LBL PAR TxLLL 83 = Lb2Llbb 0004500 7 WPublications referred toBS 88 T n t i n g c m i t *.Part 101 Methodof sampling fresh c& rcte o n ritePart 108 Method formaking test cubes out of fm h concre feP~rt 0 9 Methodfor msking test b s a n c c u t o f f m h concretePin 110 Method fo r mdri ng m t y li nders cut of fresh concretePart 112. Methodi of occaleritcd curing of test cuberPart 113' Methodofmsking and curing no-fines test cubesS 6328 Mathods for fpscifying concrete, Including m d ym ix ed concrete

Refend to in the foroword only.




Thii Briihh C . .am. htvinp k c n preparcd un& t he direction ofthc Cemrrtt. Gyprum. Aggregatn a n d Quarry Products StandardsCommittee. wm puuishedunder the authority of the Board of BSIand comes in to effect on 29July 1983.British Standards Institution. 1983

ISBN 0 5 8 0 13332 X

Mil ion Keynes MK14 6LE. The number for telcphonc e i iuiries i s0908 320033 and for telex 825777.ContrrtA Br itish Siandard does not purpor t to include a l l the necessaryprovilions of a contract. Users of British Siandardsare responsiblefor their correct application.

British Standrrds ImtihitbnIncorporated by ROVJICharter. BSI i s the independent nationalbody for the preparation of British Standards. I t s the UK memberof the Intermti rt - i Orp niz iti on for Standardization and UKsponsor of theEiectrotechnlui hnmiuion.CopyrightUsers of British Standards are reminded that copyr ighi subsists inail BSI publicationt. No part of this publication may be reproducedin any form withou t the prior permission in writing of BSI. Thisdoes not preclude the free use. in the.coufse of implementing thestandard, of ncCesSary details w t h as symbols and rire. type orgrade designations. Enauiries should be addressed to thePublications Manaper. British Standards Insti tution. Lin ford Wood.

ish National Committee of the lntcrnational

Rrvis ion of Br itish StandardsBritish Standards are revised. when necessary, b y he issue eitherof amendments or of revised editions. I t s important that users o fBritish Stindards should ascerta in that they are in possessiono fthr l a tes t amrndmrnts or dit ion r. Information on all BSIpublications s in the BSI C l t r l ogue . supplemented each mo nt kb yBSI e w which i s available to subscrihing members of theInst itu tion and gives details of new pubtication . evw.ms,amendments and withdrawn standards. Any person who, whenmakiag use of a Bri tish Standard. encountersa n inaccuracy orambiguity. i d requested to notily BSI without delay in order thatthe matter may be investigated and appropriate action taken.The following BSl references elate to ' le work on this standard:Committee reference CAB14 Draft for comment 81112319 DC

- -

Committees re3ponsible for this British StandardThis British Standardwas pubtithedundet the direction of theCernent, Gypsum, Agpregatet and Quarry Products StandardsCommittee CAB/-. ts preparationwas entrusted to TechnicalCommittee CAIN4 upon M i c h h e following bodies wererepresented:British Aggregate Construction Materials IncbstriesBritish Pr tc st Concrete Federation Ltd.British Ready Mixed Concrete AssociationCement Admixtures AssociationCement and Concrete AssociationCement Makers' FederationConcrete Society LimitedCounty Suwo rs ' SocietyDeparment of the Environment (Building Research EstaMishment),Department of the Environment (PSA)Depattment of t h e Environment (Transport and Road ResearchDepartment of TransportLabora?orv)

Federation of Civil Engineering ContractorsGreater London CouncilInsti tute of Concrete TechnologyInstitution of Civ il EngineersInttitution of Highway EngineersInstitu tion of Municipal EngineersInst itu tion of Structural EngineersInstitution ofWater Engineers and Scient istsNational Federation of Building Trades EmployersRoyal Institute of British ArchitectsRoyal Ins titu tion of Chartered SurveyorsSand and Gravel Association LimiteaSociety of Chemical IndustryThe following bcdies were also represented n the drafting of thestandard. through subcanmittees and panels:dritish Civil EngineeringTest Equipment Manufacturers' AssociationCoopted members

Electricity Supoly Industry in England andWales

Amendment No. 1published and effective fr om 31 July 1989t o BS 1881 :Part 111 :1983Testing concretePart 111. Method of normal curing oftest specimens 2 0 O C method)

AMD 102July tW9 ForewordAlter the tart paragraph ii..ert the following.'NOTE. Th t high humidiw required nmoist air+uilnp moms smnnatlv ~ r o d u c c d v ipraving w a i w l ine nmtoi. r x.ttmim Lrpionr l lr pncumopkilr i ldewpnM in miun a n d sp m m l n Ihr water w tteml 01 many hihi inpl . Sc i i e i n p ' m o i ha n d cht mi ul nuir icnn In the WJIW supply mar e n c a i r .g t groirthof this organism &ich m u i t i o i kb t wm 20 * C and about 4 5 C.Inhaling n leclcd .Erolols 11 a known rw t r l o r lransmisiion o1Lq io nn air d diseast. I t s I h tn l o n d vi u hi c lo rnainl#incoldwater rupp l i t l blow 20 'C where wsiibte and IO store hol waiera b o n *c+cohi a I c i suoplies may b.dlt in lutcd by chtoiinalion10 l k a s 1 5 mplL m chlorine. Rrgutar Mr iod i c chuting or het m s t c a of Lwionellr wccm in ~ M U ~ I I I ~ I ater iuwplirsn astn%Llc r tc iui ion

A MO 6102July tm Ciausc 4. ProcedureIn wrrgraph 5. l i n e 1 a f l t r the note,delete 'polythene' and subs:iiit~t: ~..i.,1 1 1 3 i i ~ l ~ ~tother irnperviou ectinq'.

AMD 6101Jut, 19P9 Publications referred toIn ine I delete 6s 1161' and suhriliute 8s 1881'

CAB14


Documents

BS 1881-PART-111 CONCRETE Method Forn Normal Curing of Test