T&M16
Transcript of T&M16
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NEW ERA UNIVERSITY COLLEGE OF ENGINEERING AND TECHNOLOGY
DEPARTMENT OF CIVIL ENGINEERING
“CONSTRUCTION MATERIALS AND
TESTING”
LABORATORY MANUAL(2012 EDITION)
BY
GERMAN B. BARLIS, DT
Laboa!o" E#$%&'$ No. 1
AIR CONTENT OF FRESHY CONCRETE
BY THE VOLUMETRIC METHOD
Na$*Santos,Katrina
Cassandra
Da!$ P$+o$*SEPTEMBER
1-,2012
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Co'$/Y$a* BSCE/! Y$a Da!$ Sb&!!$*SEPTEMBER ,
2012S$%!&o*3$ 4*50611*50a I'!%!o* Bo. GERMAN B.
BARLISLaboratory Exercise No. 16
AIR CONTENT OF FRESH CONCRETE BY THE VOLUETRIC ETHO!
FINAL DATA SHEET
A. Proportion by Mass
Trial Numbers
Descriptions 1 2 !
ass o" ce#e$t% &'
ass o" sa$(% &'
ass o" 'ra)e* %&'
ass o" +ater% &'
,ater-Ce#e$t Ratio
Air Co$te$t %
A. Proportion by "olume
Trial Numbers
Descriptions 1 2 !
Vo*/#e o" ce#e$t% #0 0.027454
Vo*/#e o" sa$(% #0 0.0887
Vo*/#e o" 'ra)e*%#0 0.04581
Vo*/#e o" +ater% #0 UN9NO3N UN9NO3N UN9NO3N UN9NO3N
,ater-Ce#e$t Ratio UN9NO3N UN9NO3N UN9NO3N UN9NO3N
Air Co$te$t % 2.8:
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Nam! Sa!o', 9a!&a
Ca''aa T.
Dat "r#ormd* S$;!$b$
1-.2012Co$rs%Yar! ! Y$a BS C&&$$&>
Instr$&tor ! Bo. G$a Ba=&'
Laboratory Exercise No. 16
AIR CONTENT OF FRESH CONCRETE NY VOLUMETRIC METHOD
PRELIMINARY DATA SHEET
#. Proportion by Mass
Trial Numbers
Descriptions 1 2 !
ass o" ce#e$t% &'
ass o" sa$(% &'
ass o" 'ra)e*%&'
ass o" +ater% &'
,ater-Ce#e$t Ratio
Air Co$te$t%
#. Proportion by "olume
Trial Numbers
Descriptions 1 2 !
Vo*/#e o" ce#e$t% #0 0.027454
Vo*/#e o" sa$(% #0 0.0887
Vo*/#e o" 'ra)e*% #0 0.04581
Vo*/#e o" +ater% #0 UN9NO3N UN9NO3N UN9NO3N UN9NO3N
,ater-Ce#e$t Ratio UN9NO3N UN9NO3N UN9NO3N UN9NO3N
Air Co$te$t Ratio% 2.8:
Group No . 5
Group Leader :Caigas, Yollene
Group Members : ignature
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1. !alolong,"lorence #oy $$$$$$$$$$$$$$$$$$
%. Elorde,&arina &laire $$$$$$$$$$$$$$$$$$
'. Mendiola, (eyniel #o)n $$$$$$$$$$$$$$$$$$
*. antos, &atrina Cassandra $$$$$$$$$$$$$$$$$$
+pproed by-
Bro. German Bar!"# D
(Instructor)
SET UP OF APPARATUS
After placing a freshly mixed concrete Inside the Measuring bowl of the device,We rod each of the two layers twenty-five times.
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After rodded each layer, we tapped theside of measuring bowl 1 times with the rubber mallet .
!lean the top flange and exteriorof the measuring bowl to remove excessconcrete
After cleaning process, we placed the cover and tighten the clamp
We put water inside thevolumetric airmeter ,and tilted thedevice and vigorously roll the airmeter
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"lace the meter upright , loosen the cap and allow the li#uid levelto stabil$e until water level does not change by more than .1 percent. And then werepeat rolling and roc%ing procedure for one minute until two consecutive readings donot change by more than .&'( air content.
SAM"LE COM"UTATION
Ratio 1:2:3
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Fo C$$!?1
6V
t (1.55)
1
6(0.10776 )(1.55)
Cmnt ' ()(*+-m.
Fo Sa?2
6V
t (1.55)
2
6(0.10776 )(1.55)
Sand ' ()(//0+0m.
Fo Ga
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ANALYSIS AND INTERPRETATION OF DATA AND RESULT
I$ tis *aboratory exercise% +e *ear$e( Te i#2orta$ce o" )o*/#etric
#eto( i$ #eas/ri$' te air e$trai$e( %it is a*so ca**e( te ro**-a-#eter% is 2ractica* "or
"ie*(-testi$' a** co$cretes% i$c*/(i$' tose +it *i't+ei't a$( 2oro/s a''re'ates. Tis#eto( co)ers te t+o c*assi"icatio$ +ic are 3 4ro2ortio$ by #ass %+erei$ te #ass
o" ce#e$t% #ass o" sa$(% #ass o" 'ra)e*% a$( #ass o" +ater is bei$' (eter#i$e . Te
seco$( c*assi"icatio$ is te 4ro2ortio$ by )o*/#e o" te s*/#2% +erei$ te )o*/#e o"
ce#e$t% sa$(%'ra)e*% a$( +ater is bei$' (eter#i$e(. For bot c*assi"icatio$s ,ater-
ce#e$t ratio a$( s*/#2 is recor(e(. Tis test #eto( as bee$ (e)e*o2e( to #eas/re
te air co$te$t o" "res*y #ixe( co$crete. I$ tis #eto(% air e$trai$e( i$ co$crete is
re*ease( a$( a**o+ to "*oat by a'itatio$. Te )o*/#e re*ease( air is #eas/re( /si$' te
b/i*t i$ si't t/be tat 2ro)i(es (irect rea(i$' o" 2erce$ta'e i" air co$te$t.
As see$ te tab/*ate( (ata% +e #eas/re( a "res*y #ixe( co$crete ,it a
co$crete Vo*/#e ratio o" 13530 % +e a)e a tota* )o*/#e o" ce#e$t +ic is .57800# 0%
a tota* )o*/#e o" .99676#: "or sa$(% a$( a tota* )o*/#e o" ;ra)e* +ic. .8091
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CONCLUSION
U2o$ te co#2*etio$ o" tis ex2eri#e$t% +e +ere ab*e to *ear$ te ri't
2roce(/re o" #eas/ri$' te air e$trai$e( co$te$t o" "res*y #ixe( co$crete a$( +e a*so
co#2*ie( to te ob?ecti)es i$ +ic to &$o+ te i#2orta$ce o" air e$trai$e( co$te$t i$ a
co$crete.
I tere"ore co$c*/(e tat% Te )o*/#etric #eto( si#2*y tests "res co$cretes
co$tai$i$' a$y ty2e o" a''re'ate by #eas/ri$' te )o*/#e o" e$trai$e( air (irect*y.
sa#2*e o" te co$crete is 2*ace( i$ te testi$' a22arat/s a$( air is ex2e**e( "ro# te
co$crete by #a$/a* #eto(s. A (irect rea(i$' is #a(e. Tis tec$i>/e ca$ a*so be
e#2*oye( /si$' o$*y #ortar @ce#e$t% sa$( a$( +ater.
I a*so *ear$e( tat Lo+ air co$te$t co$crete #ay be re-#ixe( at #ixi$'
s2ee( a$( re-teste( "or acce2ta$ce. Hi' air co$te$t co$crete #ay be a**o+e( to #ix o$
a'itati$' re)o*/tio$s "or a 2erio( o" ti#e a$( te$ be re-teste(. Te ty2e o" air e$trai$i$'
a'e$t ca$ a)e a #a?or e""ect o$ te abi*ity to e$trai$ a$( o*( air i$ co$crete. Re#ixi$'
air-e$trai$e( co$crete so/*( be (o$e +it ca/tio$% as too #/c #ixi$' ca$ ca/se too
i' a$ air% +ic ca$ res/*t i$ stre$'t *oss.