Abstract
In order to regulate the quality of concrete, the production should be begun with accurate measurement of the specified quantities of materials. However, the accurate and quick measurement of the surface moisture of fine aggregate is difficult for most production systems currently in operation in ready-mixed concrete plants. To solve this problem, the authors devised “the immersed fine aggregate batching method, ” in which fine aggregate is immersed in water and batched in a saturated condition, to calculate accurate quantities of water and fine aggregate independent of fluctuating surface water. This paper reports on the verification tests for putting this concrete production system, in which immersed fine aggregate is batched, into practical use. Batching control of immersed fine aggregate and specifications of the equipment are also described, while reporting the quality confirmation test results made using this method.
