MORTAR FOR SEMIAUTOMATIC WET FACING

摘要

A semi-automatic self-leveling wet finishing mortar is provided to obtain higher flowability, improved workability and minimized crack generation in mortar for skyscrapers, to reduce the period for construction, to improve the quality of the construction by lowering the ratio of water and cement in mortar, and to reduce the cost for repair of defect by self-leveling. A semi-automatic self-leveling wet finishing mortar comprises finishing mortar powder and liquid in a ratio of 100:15 by weight, the mortar powder comprises 15.094-25.9% by weight of normal Portland cement, 65.094-75.9% by weight of fine aggregate(sand), 0.05-1% by weight of expandable calcium sulfoaluminate, 0.1-1% by weight of hard-burned lime, 0.5-3% by weight of fly ash, 0.5-3% by weight of furnace slag, 0.001-0.005% by weight of starch thickener as an underwater concrete stabilizer, 0.0005-0.001% by weight of polyethylene oxide as an inhibitor against instant-drying of surface(moisturizer) and 0.1-1% by weight of cellulose fiber which has 1,500,000 particles per gram as an anti-cracking fiber, and the liquid comprises 0.2-1% by weight of polycarbonic antiplasticizer and 99-99.8% by weight of purified water. The wet finishing mortar is placed on an On-Dol(Korean underfloor heating) structure of skyscraper apartment or architecture by grouting method.