首页>
外国专利>
CONCRETE NOT HARDENED FOR WET SPRAYING TO OBTAIN HIGH-STRENGTH CURED PRODUCT, METHOD FOR FORMING HIGH-STRENGTH CURED PRODUCT BY SPRAYING THE SAME, AND HIGH-STRENGTH CURED PRODUCT BY SPRAYING THE SAME
CONCRETE NOT HARDENED FOR WET SPRAYING TO OBTAIN HIGH-STRENGTH CURED PRODUCT, METHOD FOR FORMING HIGH-STRENGTH CURED PRODUCT BY SPRAYING THE SAME, AND HIGH-STRENGTH CURED PRODUCT BY SPRAYING THE SAME
PROBLEM TO BE SOLVED: To form high-strength cured products with good workability and operability by including a cement dispersing agent in a specific content in cement. ;SOLUTION: This high-strength cured concrete product is formed by using concrete not hardened containing 0.01-1.5 pts.wt. cement dispersing agent based on 100 pts.wt. cement. The cement comprises clinker powder and gypsum, and contains 2.5-4.0 wt.% gypsum in terms of SO3 based on the content of clinker powder and has 3,200-4,900 Blaine specific surface area. The cement dispersing agent is a water-soluble vinyl copolymer having 2,500-50,000 number average molecular weight, in which structural units of formulae I and II [R1 is H or methyl; R2 is a 1-3C alkyl or phenyl; (m) is an integer of 5-75; M is a cation selected from the group consisting of an alkali metal, an alkaline earth metal and an organic amine] exist in ≥80 mol.% content based on the total structural units and the mol.% ratio of (structural units of formula I/structural units of formula II) is (45/55)-(90/10).;COPYRIGHT: (C)1999,JPO
展开▼
