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1. (WO2018198391) CEMENT COMPOSITION, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING FLY ASH FOR CEMENT COMPOSITION

Pub. No.:    WO/2018/198391    International Application No.:    PCT/JP2017/033784
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Sep 20 01:59:59 CEST 2017
IPC: C04B 7/26
B09B 3/00
C04B 18/08
Applicants: SUMITOMO OSAKA CEMENT CO., LTD.
住友大阪セメント株式会社
Inventors: KANAI, Kensuke
金井 謙介
MATSUDA, Hideaki
松田 英明
Title: CEMENT COMPOSITION, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING FLY ASH FOR CEMENT COMPOSITION
Abstract:
Provided are: a cement composition that retains properties as a mixing material such as improving fluidity and contributing to a strength development, said cement composition being capable of using all of the raw material fly ash obtained from a coal-fired power plant, etc., without having to classify out the coarse powder, and also being capable of contributing to long-term strength development; a method for producing said cement composition; and a method for producing fly ash for a cement composition. The cement composition is characterized by including cement and fly ash, the fly ash content being 30 mass% or less, and the fly ash having a volumetric particle size distribution that satisfies formula (I). 0.24 < (D50 - D10)/(D90 - D50) ≤ 0.5 (I) (In the formula, D10, D50, and D90 respectively represent particle diameters that are equivalent to cumulative frequencies of 10%, 50%, and 90% from the small diameter side of the fly ash)