concrete - Gradation and Size


Gradation Test
The gradation of a particular aggregate is most often determined by a sieve analysis .  In a sieve analysis, a sample of dry aggregate of known weight is separated through a series of sieves with progressively smaller openings. Once separated, the weight of particles retained on each sieve is measured and compared to the total sample weight.  Particle size distribution is then expressed as a percent retained by weight on each sieve size. 

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