TESTS ON aggregate

10% Fines Value

Code: This test is done as per (IS: 2386-Part 4-1963)

Preparation sample

Test sample is dried in oven for a period of four hours at a temperature of 100 to 1100C.

Procedure:

• i) The cylindrical measure is filled by the test sample of aggregate in three layers of approximately equal depth, each layer being tamped 25 times.
• ii) The test sample in the cylinder with the plunger in position is placed in the compression testing machine. The load is applied at a uniform rate so as to cause a total penetration of the plunger of about 20mm for normal crushed aggregates in 10 minutes.
• iii) For rounded or partially rounded aggregates, the load required to cause a total penetration of 15mm is applied whereas for honeycombed aggregates a penetration of 24mm is applied in 10 minutes.
• iv) After the maximum specified load is reached, the load is released and the aggregate from the cylinder is sieved from 2.36mm IS sieve.
• v) 5. The fines passing 2.36mm.IS sieve is weighed and expressed as a percentage of by weight of the test sample.

Uses:

To determine the 10% fines of coarse aggregate.