QUICK-HARDENING CALCIUM PHOSPHATE CEMENT

摘要

PROBLEM TO BE SOLVED: To obtain a quick-hardening calcium phosphate cement that hardens quickly and ensures high wet compressive strength even when it is kneaded with only water such as pure water without adding an acid to the water used as a kneading liquid. SOLUTION: The calcium phosphate cement contains at least one of calcium hydrogenphosphate dihydrate (DCPD) powder and calcium hydrogenphosphate anhydride (DCPA) powder having 1-50 m2/g, particularly 3-10 m2/g specific surface area. The total amount of the DCPD powder and DCPA powder is preferably 20-50 pts.wt. based on 100 pts.wt. cement. The cement further preferably contains >=60 pts.wt., particularly >=80 pts.wt. DCPD powder, DCPA powder and tetracalcium phosphate powder as essential components.