Aggregate crushing value test step by step procedure ,this test is repeated once or twice and the average crushing value of the aggregate is determined. the average crushing value in the different tests is the actual crushing value of aggregate. important points to remember. It is recommended that the crushing value of aggregate should be less than 30%.free consultaion
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this test is repeated once or twice and the average crushing value of the aggregate is determined. the average crushing value in the different tests is the actual crushing value of aggregate. important points to remember. It is recommended that the crushing value of aggregate should be less than 30%.
calculation of aggregate crushing value. the aggregate crushing value is defined as the ratio of the weight of fines passing through specified IS to the total weight of sample expressed in percentage. weigh of the total aggregates weigh of aggregates passing through 2.m IS sieve.
mar 28, 2021 bulk specific gravity test; polishing test; aggregate crushing test :1963 & BS :1990) aggregate crushing test values indicates the strength of aggregate and hence it is very significant. similarly we can say crushing value is the relative measure of resistance of an aggregate under gradually applied compressive loads.
the crushing value test of aggregate provides the resistance of an aggregate sample to crushing under gradually applied compressive load.generally, the test is conducted on aggregate passing 12.5 mm and retained on a mm sieve.the aggregate sample is filled in a cylindrical mold and a load of tons is applied through a plunger in a compression testing machine.
the apparatus of the aggregate crushing value test as per is: 2386 1963 consists of: diameter open ended steel cylinder with plunger and base plate, of the general form and dimensions as shown in fig straight metal tamping rod
the aggregate crushing value test evaluates the ability of the aggregates used in road or pavement construction to withstand the stresses induced by moving vehicles in the form of crushing. with this, the aggregates should also provide sufficient resistance to crushing under the roller during construction work and under rigid tyre rims of
the aggregate crushing value provides a relative measure of the resistance of an aggregate to crushing under gradually applied crushing load. the aggregate crushing value test is a useful guide when dealing with aggregates of unknown performance, particularly when lower strength is suspected.
chapter standard test procedures tests for aggregates and bricks may 2001 page 7.35 220.127.116.11 results. calculate the mean of the two values determined to the nearest whole number. report the mean as the aggregate crushing value, unless the individual results differ by more than 0.07 times the mean value. In this case repeat the test on two further specimens, calculate the median of the four
the aggregate crushing value is an essential index in the construction of road bases and is defined as the mass percentage of fine particles after a confined compression test of recycled cdw.
impact, 10% fines & crushing testsfigure apparatus for the 10% fines test and aggregate crushing test the material used for both tests is aggregate passing a 12.70 mm sieve and retained on a 9.52 mm sieve.
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