PRODUCTION OF FLY ASH HAVING LOW SEPARABILITY AND PRODUCTION OF CONCRETE HAVING LOW SEPARABILITY

摘要

PURPOSE:To lessen an amount of separation reducing agent in obtaining concrete not requiring compaction. CONSTITUTION:In a method for producing concrete by kneading cement with fly ash, an aggregate, a water reducing agent and water, low separable fly ash obtained by blending fly ash with a separation reducing agent and grinding (powdering) is used as the fly ash. Consequently, the amount of the separation reducing agent-containing fly ash is extremely large, the separation reducing agent can effectively be dispersed as the low separable fly ash into concrete and sufficient separation reducing effect can be attained with a small amount of the separation reducing used.