ULTRA FAST-CURING INJECTION MATERIAL AND INJECTION PROCESS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain an ultra fast-curing injection material which may control the gelling time of the injection material to be within 10 min, exerts an excellent durability and permeability and allows crack repair of embankments and water- stopping without any water pollution caused by a diverge flow of the injection material. SOLUTION: This ultra fast-curing injection material contains a fine-powdery hydraulic material slurry wherein a dispersing agent and water are mixed with a hydraulic material fine powder essentially comprising a blast furnace slag fine powder having either a maximum particle size of 12μm or a blaine specific surface area of from 10,000 to 20,000 cm2/g, and an ultra fast-curing admixture slurry prepared by kneading water and an ultra fast-curing admixture prepared by mixing one or more of gypsum, calcium hydroxide or calcium oxide with a material essentially comprising a calcium aluminate composition having a maximum particle size of <=45μm and a 85% particle size of <=25μm. These slurries are mixed at the initiation of injection.