CEMENT EXPANDING AGENT FOR PRESSURE GROUTING TO IMPROVE STABILITY OF STRUCTURE AND WORKABILITY AND TO REDUCE EFFECTS OF CURING CONDITIONS

摘要

PURPOSE: A cement expanding agent useful for pressure grouting is provided to improve stability of a structure where it is used due to its increased adhesion area and thus adhesion properties, to maintain shrinkage-reducing properties thereof so as to reduce effects of types of cement or curing conditions such as curing temperature, and to improve workability due to the wide range of appropriate amount for use. CONSTITUTION: The cement expanding agent useful for pressure grouting comprises: as a ground clinker, 15-60wt% of free calcium oxide; 5-30wt% of free CaF2; 30-80wt% of 11CaO, 7Al2O3·CaF2; and 10wt% or less of other ingredients.