The density in saturated surface-dry condition of the aggregate, measuring method of absorption coefficient and surface moisture factor and is used for that the hot aggregate cooling system

摘要

PROBLEM TO BE SOLVED: To provide a method for measuring the density in a saturated surface-dry condition, rate of water absorption, and surface moisture ratio of an aggregate capable of simplifying a measuring method, shortening measuring time, and obtaining measurement values with high reliability by simultaneously obtaining the density in a saturated surface-dry condition, percentage of water absorption, and the surface moisture ratio of the wet aggregate to be measured and a high-temperature aggregate cooling device used for the same.;SOLUTION: Aggregate samples A and B of the same weight (m) are separated and acquired from the wet aggregate. The aggregate sample A is housed in a determining container, and water is added to measure gross weight W in a state filled with water. The aggregate sample B is heated and dried, to measure weight (m0) in an absolute dry condition and cooled to a normal temperature range. Then the aggregate sample B is housed in a determining container, and water is added to measure 9 gross weight W1, in a state filled water. From the measured values, the absolute capacities (s) and quantities (q) of water absorption of the aggregate sample A and B are obtained, to obtain the density ρ in a saturated surface-dry condition the rate of water absorption, and surface moisture ratio H.;COPYRIGHT: (C)2002,JPO