EXECUTION METHOD FOR AIR-PERMEABLE SUBSTRATE LAYER FOR AIR UNPERMEABLE FLOOR FINISHING MATERIAL AND COMPOSITION THEREOF

摘要

PROBLEM TO BE SOLVED: To realize an air-permeable substrate layer formation without aggregate separation by agitation and kneading for sufficient bubble mixing by a foaming agent at a low cost and an air-entraining agent. SOLUTION: Water is added to the self-leveling composition using a hydraulic cementitious substance obtained by adding 50-200 pts.wt. of aggregate having specific gravity of 1.8-2.3 and grain size of 2.5 mm or less to a 100 pts.wt. hydraulic cementitious substance and adding a 0.1-5 pts.wt. of foaming agent and a 1-10 pts.wt. of emulsion as a principal binding material, and agitated sufficiently, and placed on a concrete substrate.