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Aggregate Abrasion Value

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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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Comments
  • bhupendra paras August 12, 2009 at 5:16 pm

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

  • saurabh singh September 3, 2009 at 1:53 am

    very useful information.

  • Dickson K. Gidion December 11, 2009 at 1:29 am

    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 December 11, 2009 at 9:24 pm

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

  • Eric November 5, 2010 at 5:04 am

    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 May 9, 2012 at 1:17 am

      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 December 19, 2010 at 1:40 pm

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

  • sudish June 14, 2011 at 2:02 am

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

  • nikhil December 5, 2011 at 10:56 am

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

  • par December 31, 2011 at 2:27 am

    why is 1.7mm sieve used in LAA?

  • Ayan Das April 12, 2012 at 3:25 pm

    thanks yaar…

  • neethu July 28, 2012 at 12:11 pm

    good…. it was so helpful thanks……

  • AMOL NANAVARE April 9, 2014 at 3:41 am

    thanks yar……..

  • bhupendra kumar swami June 24, 2014 at 11:32 pm

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

  • ericco killian anselmus March 21, 2017 at 4:47 am

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

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