earticle

영어

Modified cement is used for the performance recovery of recently built concrete structure. Types of modified cement can largely divided into inorganic and organic material. Although rapid hardening and ultra rapid hardening mortar are used in modified cement for the completion of repair in the shortest time, not many studies related to magnesia phosphate with rapid hardening capacity have been carried out compared to other materials. In this study, the trait of strength for each composition rate of rapid hardening magnesia phosphate was grasped the possibility as new substitute material was examined. Sodium phosphate, potassium phosphate, and ammonium phosphate added as magnesia phosphate material was mixed with magnesia, fly ash, blast furnace slag, and boric acid to examine the strength, pot life, and the smoothness of the surface.