FLY ASH ACTIVITY IMPROVING METHOD, FLY ASH CEMENT USING ACTIVATED FLY ASH, AND CONCRETE COMPOSITION USING ACTIVATED FLY ASH AND FLY ASH CEMENT

摘要

PROBLEM TO BE SOLVED: To provide an activity improving method for heightening reactivity of fly ash by combining a physical method with a chemical method.SOLUTION: This activity improving method 1 includes: a crushing step S1 of crushing fly ash to adjust the fly ash so as to have a prescribed specific surface area; and an addition step S4 having respectively a sodium salt addition step S2 of adding sodium hydroxide to the fly ash crushed in the crushing step S1, and a calcium salt addition step S3 of adding calcium hydroxide and/or calcium sulfate.