The aggregate which are flaky or elongated are not desirable because the large number of flaky aggregate concrete large percentage of voids, which intern will require large amount of fine materials and also more water for the same workability, since such shapes offer more surface area for lubrication. It also tends to harm durability, because the particles tend to be oriented in one plane thus causing laminations.
Aim: To determine the Elongated shape of particles of coarse aggregate
Balance with accuracy of 0.1% of weight of the sample Elongation Index Gauge All other as per Sieve analysis
It shall be taken from retained material from Sieve analysis preferably and should have at least 200 pieces of any fraction
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