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Aggregate Crushing Value

Aggregate Crushing Value

AGGREGATE CRUSHING VALUE
This test helps to determine the aggregate crushing value of coarse aggregates as per IS: 2386 (Part IV) – 1963. The apparatus used is Cylindrical measure and plunger, Compression testing machine, IS Sieves of sizes – 12.5mm, 10mm and 2.36mm

Procedure to determine Aggregate Crushing Value
i) The aggregates passing through 12.5mm and retained on 10mm IS Sieve are oven-dried at a temperature of 100 to 110oC for 3 to 4hrs.

ii) The cylinder of the apparatus is filled in 3 layers, each layer tamped with 25 strokes of a tamping rod.

iii) The weight of aggregates is measured (Weight ‘A’).

iv) The surface of the aggregates is then leveled and the plunger inserted. The apparatus is then placed in the compression testing machine and loaded at a uniform rate so as to achieve 40t load in 10 minutes. After this, the load is released.

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v) The sample is then sieved through a 2.36mm IS Sieve and the fraction passing through the sieve is weighed (Weight ‘B’).

vi) Two tests should be conducted.

Aggregate crushing value = (B/A) x 100%.

cylindrical-measure-plunger-aggregate-crushing

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

55 comments on "Aggregate Crushing Value"

m.khadarsheriff says:

what will be the lower and higher values of acv
and what is the permissible values

Prabhakar says:

Aggregate crushing value, when
determined in accordance with IS: 2386 (Part IV)-1963 shall not exceed
45 % for aggregate used for concrete other than for wearing surfaces,
and 30 percent for concrete for wearing surfaces, such as runways, roads

amaresh says:

what should be done if the acv value is below 30%

pankaj kumar singh says:

it is the deciding factor whether it should be used in sub layer or upper layer according to standard value it should be less than 30%

amol katgaonkar says:

as per is code it should not be more than 25% for wearing surfaces & 45% for non wearing surfaces.

adekeye adeshina says:

what is the standard aggregate (crushing, impact and abrasion) values of sharp sand in accordance with British Standard. Tanx

Jibola boladale says:

Kindly explain what absortion of aggregate is?dis is helpful

Akpojotor Godwin says:

I so much luv engineering

Akpojotor Godwin says:

What is electr drainage and electro injection? According to soil mechanics

pombo says:

know of any formula allowing to estimate dry TFV from ACV value?

Dada shina says:

Pls, can i get the ACV range of Granite, Basalt, Limestone, felspar

uzebu osaretin says:

D site is really rich in knowlege

Adel A. mirza says:

What about other fractions of the aggregate sample, i.e larger than 12.5 mm and less than 10 mm?

LUMALA MADIRISHA says:

It is true that you are creating the world

Mohammed rafi says:

Pls reply me, what will we conclude when ACV get 24%???

TOYIN OLAYINKA O. says:

please how can i determine ACV for 20mm and 10mm coarse aggregate

B RAMU says:

according to IS 2386 (Part iv)-1963 aggregate crushing value is designed for only for IS Sieves of sizes – 12.5mm, 10mm and 2.36mm, for 20mm and 10mm coarse aggregate we need to take different ranges of sieves, then cylinders size will also changes….

P.HARIBABU says:

why the aggregate retained in 10mm sieve can be taken for test?

Shubham batu says:

Plz Explain sir why impact 25times only

Shubhanshu Yadav says:

what is meant by filling cylinder in 3 layer?

Ondiek Ondiek T says:

can this test (ACV) be conducted on granitic aggregates??

SDK says:

I want to know the relationship between ACVand compressive strength

samson berta says:

Not only thank-you Real thank-you….

Shubham Mudgal says:

What is aggregate crushing strength? Or how to determine aggregate crushing strength from aggregate crushing value?

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