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What is AASHTO T 85: Coarse Aggregate Specific Gravity about?

1. This test method determines the specific gravity of coarse aggregates through four determinations: bulk specific gravity, bulk saturated surface dry (SSD) specific gravity, apparent specific gravity, and absorption. 2. Samples are dried, soaked in water for 15 hours, weighed saturated on the surface but dry below, and weighed dry to calculate specific gravity values and absorption. 3. Calculations are based on oven dry weight, SSD weight, and weight in water to determine specific gravity and absorption,

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