METHOD FOR PRODUCING RECYCLED FINE AGGREGATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing recycled fine aggregate that can attain environmental load reduction and energy load reduction in the production thereof and quality improvement of the fine recycled aggregate in the mechanical treatment where the raw material, concrete debris is subjected to crushing and grinding.

SOLUTION: (1) The raw material (concrete debris) is classified with a 10 mm sieve into particles of 10-40 mm and particles of 5-10 mm (material 1). (2) The particles of 10-40 mm are fed to a mechanical grinder and are separated into particles of 5 mm or larger and particles of 5 mm or smaller (material 2). (3) The material 1 and the material 2 are mixed and fed again to the mechanical grinder to obtain the recycled fine aggregate of 5 mm or smaller (fine powder of 1 mm or smaller is removed).

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