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AASHTO Method T27, also known as "Standard Method of Test for Sieve Analysis of Fine and Coarse Aggregates," is a standard test method used for determining the particle size distribution of aggregates. This method involves sieving the sample through a series of sieves and calculating the percentage of material retained on each sieve to classify the aggregate. It is widely used in the construction industry to ensure the quality and gradation of aggregates for use in concrete and asphalt mixtures.

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