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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.