HIGH-FLUIDITY LIGHTWEIGHT MORTAR COMPOSITION AND HIGH-FLUIDITY LIGHTWEIGHT MORTAR USING THE SAME

PROBLEM TO BE SOLVED: To provide: a high-fluidity lightweight mortar composition which is light and excellent in fluidity, does not cause bleeding or material separation, is suppressed in swelling after working as a filler for a steel plate lining construction method, has good workability, and exerts sufficient strength; and a high-fluidity lightweight mortar using the same.SOLUTION: A high-fluidity lightweight mortar composition comprises: cement; a blast furnace fine slag powder of a Blaine specific surface area exceeding 6,000 cm/g; an expansive material; light aggregate with a density of 0.1-0.7 kg/l; and a water-soluble cellulosic thickener and an acrylic thickener, but contains no water-reducing agent. The high-fluidity lightweight mortar composition contains 20-70 pts. mass of the cement, 25-75 pts. mass of the blast furnace slag fine powder and 2-10 pts. mass of the expansive material in 100 pts. mass of the binding material consisting of the cement, the blast furnace slag fine powder and the expansive material. 【課題】軽量で流動性に優れブリーディングや材料分離がなく、鋼板巻立て工法用充填材として施工後膨らみがなく、施工性も良好で十分な強度を発現する、高流動軽量モルタル組成物及びそれを用いた高流動軽量モルタルを提供する。【解決手段】セメントと、ブレーン比表面積が６０００ｃｍ２／ｇを超えた高炉スラグ微粉末と、膨張材と、密度が０．１〜０．７ｋｇ／ｌの軽量骨材と、水溶性セルロース系増粘剤及びアクリル系増粘剤とを含有し、減水剤を含有しないことを特徴とする高流動軽量モルタル組成物であり、セメントと高炉スラグ微粉末と膨張材からなる結合材１００質量部中、セメントが２０〜７０質量部、高炉スラグ微粉末が２５〜７５質量部、膨張材が２〜１０質量部である前記高流動軽量モルタル組成物、などである。【選択図】なし