DEPARTMENT OF ENGINEERING AND TECHNOLOGY SOIL MECHANICS
SECTION
Name:______________________________ Student I.D.
No._________________Course:_____________________________Subject:_______________________Semester
and Year: ___________________ Time and
Days:_________________Grade:______________________________
Instructor:_____________________
EXPERIMENT No. 6(MOISTU! " UNIT #!IG$T !%&TIONS$I' O
SOI%S)
COM'&CTION T!ST
!!!NC!S
&STM D*+, and D-/&&S$TO T++ (Standard) and T-,0
(Modi1ied)
M&T!I&%S &ND &''&&TUS
-. Com2action mo3d 4it5 base 23ate and co33ar.6. Com2action
rammer (67. N 8 0.90 m dro2 or 77. N 8 0.7* m dro2) or
mec5anica33y o2erated rammer.9. -0 to -6 moisture cans.7. Sam23e
e8truder (ac;) or mec5anica3 2u3e mi8in> 2an.*. Soi3 mi8er
(o2tiona3)
'OC!DU!
Note:& 4ater?content (i.e. 23astic and 3i@uid 3imits) must
be 2er1ormed 1irst ont5e soi3 sam23e ta;en 67 5ours 2rior to t5is
test. Ot5er4ise it may ta;e *to , tria3s to obtain t5e com2action
cur5t E.0- 8 9 B .09
;>s B 90 m3 o1 4aterF to account 1or t5e e5 t5e com2action
mo3dA but do not inc3ude t5e co33ar or t5e base 23ate.*. Measure
t5e com2action mo3d to determine its
8/11/2019 Expmt #6 (Moisture Density Relation)
2/3
b. Modi1ied 'roctor Test ($eae. i33 in any 5o3es in t5e
com2acted s2ecimen 4it5 eit5ersoi3 or >ra 2rocessremo
8/11/2019 Expmt #6 (Moisture Density Relation)
3/3
Gs B S2eci1ic >ra5t
4 B 4ater content
I1 Gs is not ;no4nA assume t5at t5e =ero?air?5t ato2timum
moisture is K 3ar>er t5an t5e ma8imum dry unit 4ei>5t.
romt5is assum2tion you can com2ute a 5t at ot5er
