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The fineness of cement is responsible for the rate of hydration, rate of evolution of heat and the rate of gain of strength. Finer the grains more is the surface area and faster the development of strength. The fineness of cement can be determined by Sieve Test or Air Permeability test. Sieve Test: Air-set lumps are broken, and the cement is sieved continuously in a circular and vertical motion for a period of 15 minutes. The residue left on the sieve is weighed, and it should not exceed 10% for ordinary cement. This test is rarely used for fineness.   For more details visit: Cement tests, Fineness test on cement, Consistency test on cement, Setting time of cement, Soundness test of cement, Field tests of cement, Laboratory tests on cement,Cement tests

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