ADMIXTURE FOR HIGH-STRENGTH NON-SHRINKAGE GROUT AND HIGH-STRENGTH NON-SHRINKAGE GROUT MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an admixture for high-strength non-shrinkage grout and a high-strength non-shrinkage grout material which can secure fluidity thereof and has high expression ability of the initial strength thereof without using expensive silica fume.;SOLUTION: The admixture for high-strength non-shrinkage grout is made of spherical limestone powder of which the average particle size is 2 μm or less and the roundness is 0.90 or more. The high-strength non-shrinkage grout material obtained by using the admixture for high-strength non-shrinkage grout is the full equal of the high-strength grout material using the conventional silica fume made of limestone fine powder having substantially spherical particle shape for the fluidity and, moreover, has higher expression ability for the initial strength than the conventional high-strength grout material.;COPYRIGHT: (C)2009,JPO&INPIT