RAPID HARDENING POLYMER MODIFIED CONCRETE COMPOSITION, REPAIRING METHOD FOR BRIDGE DECK OVERLAY CONCRETE PAVEMENT USING THE SAME

摘要

PURPOSE: A polymer modified rapid-hardening concrete composition and a bridge-deck paving method using thereof are provided to flexibly control the concrete placing time by adjusting a hydration through a proper mixing of retarder and a curing accelerator. CONSTITUTION: A polymer modified rapid-hardening concrete composition contains 10~25wt% of rapid-hardening concrete composition, 35~50wt% of fine aggregate, 25~35wt% of coarse aggregate, 3~7wt% of water, and 1~7wt% of reforming polymer. The rapid-hardening concrete includes 80~95wt% of powder formed by crushing a CSA clinker with 50~80% of calcium sulpho aluminate, and 5~20wt% of plaster powder formed by mixing and crushing anhydrous gypsum and hemihydrate gypsum.