Development for Productive Technology of Super Lightweight Aggregates (ASANO SUPER LITE ; ASL) ―Grinding and Granulating Process―

Abstract

 The authors have developed producing techniques on artificial lightweight aggregates using perlite from a mine, which belongs to Taiheiyo Cement Corporation, and an aggregate which has specific gravity of 0.85 ± 0.1. is in market. This aggregate (trade name: Asano Super Light, ASL) has remarkably low water absorption and high strength, comparing to traditional artificial lightweight aggregates produced from expanding shale as a main raw material.
　Because ASL belongs to a granulated type of artificial aggregate, appropriate grinding and granulation are important to produce an aggregate of high quality, finally.
　As results, the authors succeeded to increase a grinding amount from 0.45t/h to 1.4t/h and strength of green pellet by checking up of grinding and granulating processes.