17-01-2014, 02:50 PM
AGGREGATE ABRASION VALUE
AIM
To determine the abrasion value of coarse aggregates as per
IS: 2386 (Part IV) - 1963.
PROCEDURE
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.
REPORTING OF RESULTS
i) The material coarser than 1.70mm IS Sieve should be
o
washed, dried in an oven at a temperature of 100 to 110 C to
a constant weight and weighed (Weight 'B').
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.