Abstract
The key to development of a reliable concrete production system and stabilization of batch qualities lies in accurate scaling and adjustment of the quantities of each ingredients. Changing surface moisture of sand is the most influential factor in the fluctuation of concrete quality, and many types of moisture testing apparatus have recently been developed for controlling it. However, it is difficult to precisely evaluate the level of sand surface moisture. We propose a new batching method wherein, by combining sand and water, the relative quantities of surface moisture and sand can be accurately measured. This report outlines a highly reliable production system based on this new batching method, and also addresses the effects of the new methods on the stabilities of batch quality.
