Method for evaluating the quality of fly ash, fly ash for concrete, and method for producing fly ash mixed cement

摘要

PROBLEM TO BE SOLVED: To provide a method for evaluating quality of fly ash, capable of simply determining the fly ash without reducing fluidity of concrete.SOLUTION: Provided is the method for evaluating fluidity of concrete using fly ash on the basis of a ratio of the envelope peripheral lengths of fly ash particles to the peripheral lengths thereof, preferably, on the basis of less than 0.8 of a content ratio of the fly ash particles.