MODIFICATION METHOD OF COAL ASH AND PRODUCTION METHOD OF FLY ASH FOR CONCRETE ADMIXTURE

摘要

PROBLEM TO BE SOLVED: To provide a modification method of a coal ash, which can reduce unburned carbon amount in a coal ash with good efficiency.SOLUTION: The modification method of a coal ash is characterized by that a coal ash containing a 45-μm sieve residue of 10 mass% or over is classified by using a forced vortex centrifugal type classifier in a condition that the 45-μm sieve residue after the classification is in a range of 1 mass% or over and 8 mass% or under.SELECTED DRAWING: None