トンネルライニングコンクリート用特殊混和剤について

抄録

This report outlines the experimentally obtained results on (1) a special admixture for use with the ECL (Extruded Concrete Lining.) method capable of maintaining the flowability of concrete for 2-4 hours after mixing and of developing excellent strength, and (2) agents used to improve the set acceleration and the strength development of concrete used with the wet shotcrete method. The purpose of these experiments was to improve the quality of lining concrete.