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Aggregate Abrasion Value

Aggregate Abrasion Value

AGGREGATE ABRASION VALUE
This test helps to determine the abrasion value of coarse aggregates as per IS: 2386 (Part IV) – 1963.
The apparatus used in this test are Los Angles abrasion testing machine, IS Sieve of size – 1.7mm, Abrasive charge – 12 nos. cast iron or steel spheres approximately 48mm dia. and each weighing between 390 and 445g ensuring that the total weight of charge is 5000 +25g and Oven.

Sample Preparation
The test sample should consist of clean aggregates which has been dried in an oven at 105 to 110oC to a substantially constant weight and should conform to one of the gradings shown in the table below:

aggregate-abrasion-value

Procedure to determine Aggregate Abrasion Value
The test sample and the abrasive charge should be placed in the Los Angles abrasion testing machine and the machine rotated at a speed of 20 to 33 revolutions/minute for 1000 revolutions. At the completion of the test, the material should be discharged and sieved through 1.70mm IS Sieve.

aggregate-abrasion-machine

Reporting of Results
i) The material coarser than 1.70mm IS Sieve should be washed, dried in an oven at a temperature of 100 to 110oC to a constant weight and weighed (Weight ‘B’).

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ii) The proportion of loss between weight ‘A’ and weight ‘B’ of the test sample should be expressed as a percentage of the original weight of the test sample. This value should be reported as,
Aggregate abrasion value = (A-B)/B x 100%.

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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.

15 comments on "Aggregate Abrasion Value"

bhupendra paras says:

can you provide range of crushing value,impact value,abrasion value of standard aggregates.

saurabh singh says:

very useful information.

Dickson K. Gidion says:

Please help some procedures to follow in abration tes according to British Standards
I am a student studying at Mbeya Institute of science and Technology
in Tanzania

zie85 says:

can you provide the specification refer to BS code range of
crushing value, impact value & abrasion value for concreting process

Eric says:

Can you rank the tests in their order of importance and cite your reason for saying so?
AIV, ACV, LAAV, SOUNDNESS and PSV

naeem niazi says:

according to AASHTO 90 LAAV for base course should be less than 40% and for sub base course it should be less than 50%.

Tehraga says:

what is range of acceptable percentage of abration for aggregate that use for ready mix concrete

sudish says:

can u provide me the acceptance criteria for the aggregate crushing, impact, abrassion test.please

nikhil says:

why 40 ton is applied for determining crushing value of coarse aggregates. Why not 50 or some other value

par says:

why is 1.7mm sieve used in LAA?

Ayan Das says:

thanks yaar…

neethu says:

good…. it was so helpful thanks……

AMOL NANAVARE says:

thanks yar……..

bhupendra kumar swami says:

That’s really helpful to do the test in laboratories,thanks cep

ericco killian anselmus says:

why does the sample need to be dried and washed before and after the test?

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