CONCRETE COMPOSITION FOR INSTANT STRIPPING TYPE CONCRETE PRODUCTION PROCESS

摘要

PROBLEM TO BE SOLVED: To obtain a concrete composition which is appropriately used for an instant stripping type concrete production process and capable of shortening the compaction time of concrete, smoothing the surface of the resulting concrete product, and further, easily corresponding to any change in quality of aggregate used, without greatly changing a conventional instant stripping type concrete production process. SOLUTION: This concrete composition contains a coarse-grained fraction of fly ash, which fraction is obtained by removing fine grains having <=20μm grain size from the fly ash and has a <=10 wt.% content of such fine grains having <=20μm grain size.