Tests on Aggregate
Crushing Value Test
Code: This test is done as per IS: 2386 (Part IV) – 1963.
Procedure:
- 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.
- 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.
Uses:
Used to determine the Crushing value of aggregates.