Angularity Number of Coarse Aggregate (Is_2386-Part 1-1963)
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3/20/2015 ANGULARITYNUMBEROFCOARSEAGGREGATE(IS:2386Part11963)
http://civilblog.org/2013/05/08/angularitynumberofcoarseaggregateis2386part11963/ 1/12
Youarehere:Home2013May08ANGULARITYNUMBEROFCOARSEAGGREGATE(IS:2386Part11963)
ANGULARITYNUMBEROFCOARSEAGGREGATE(IS:2386Part11963)PublishedbySuryakantaonMay8,2013|2Responses
ObjectiveFordeterminationofangularitynumberofcoarseaggregates.
ReferenceStandardsIS:2386(PartI)1963Methodoftestforaggregatesforconcrete(PartI)Particlesizeandshape.
Equipment&ApparatusBalance(010kg)Sieves(20,16,12.5,10,6.3,4.75mm)MetalcylinderTampingrodScoop
TestSamplePreparationThetestsampleconsistofaggregateretainedbetweentheappropriatepairofISsieves
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3/20/2015 ANGULARITYNUMBEROFCOARSEAGGREGATE(IS:2386Part11963)
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fromthefollowingsets
PASSING RETAINED
20mm 16mm
16mm 12.5mm
12.5mm 10mm
10mm 6.3mm
6.3mm 4.75mm
Theaggregatetobetestedisdriedforatleast24hoursinawellventilatedovenmaintainedatatemperatureof100to110 C.
Procedure1. Theaggregateiscompactedinthreelayers,eachlayerbeinggiven100blowsusing
thestandardtampingrodatarateof2blows/secondbyliftingtherod5cmabovethesurfaceoftheaggregateandthenallowingittofallfreely.
2. Theblowsareuniformlydistributedoverthesurfaceoftheaggregate.3. Aftercompactingthethirdlayer,thecylinderisfilledtooverflowingandexcess
materialisremovedoffwithtempingrodasastraightedge.4. Theaggregatewithcylinderisthenweighed.Threeseparatedeterminationsaremade
andmeanweightoftheaggregateinthecylinderiscalculated.
Calculation
0
3/20/2015 ANGULARITYNUMBEROFCOARSEAGGREGATE(IS:2386Part11963)
http://civilblog.org/2013/05/08/angularitynumberofcoarseaggregateis2386part11963/ 3/12
Where,
W=meanweightoftheaggregatefillingcylinder.
C=Weightofwaterrequiredtocompletelyfillthecylinder(i.e.Volumeofcylinder)
G =SpecificGravityoftheaggregate
ReportsThemeanvalueofthreedeterminations,expressedtothenearestwholenumberisreported.
Safety&PrecautionsUsesafetyshoes,mask&apronsatthetimeoftest.Thoroughlyclean&drythecontainerbeforetesting.Specialcareshouldbetakenthatnoouterairenterswhenusingthebalance.Aftertestsieveshouldbecleanbyasoftbrush.
s
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2Responses
rakeshkumarNovember19,2014at12:03am|Permalink|Reply
Inangularitytestis2386part1TheCisweightofwater+cylinder..Intheformula67(100W/CG)
SuryakantaNovember19,2014at2:55pm|Permalink|Reply
C=Weightofwaterrequiredtofillthecylinder.Wedothisinordertomeasurethevolumeofthecylinder.
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