CEMENT COMPOSITION AND MANUFACTURING METHOD OF CEMENT COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a cement composition for an injection material which is hard to permeate into the ground.SOLUTION: A cement composition is provided for an injection material used for a cast-in-place pile construction where a bag body formed from a sheet is installed on the bottom of a pile hole on the ground, concrete is installed and hardened on the bag body to form a cast-in-place pile, and the injection material is injected into the bag body and hardened. When an 85% particle size is defined as G, a 60% particle size is defined as Gand a 10% particle size is defined as G, Gis equal to or more than 70 μm and G/Gis equal to or more than 7.