PROBLEM TO BE SOLVED: To obtain excellent early strength by using cement, fine aggregates, coarse aggregates, a cement dispersant consisting of a water-soluble vinyl copoly mer containing structural units expressed by specified formulae and a hardening accelerator under the prescribed ratio thereof. ;SOLUTION: The cement dispersant of the water-soluble vinyl copolymer having 2000-20000 number average molecular weight which is polymerized methacrylic acid, methyl-methacrylate, etc., and whose structural units A-D expressed by formulae I-IV (R1, R2; H, CH3, R3; phenyl, etc., M1, M2; an alkali metal, etc.,), consist of 40-65mol.% A, by mol., 2-20% B, 5-20% C, and 10-40% D, is obtained. Next, 100 pts., by wt.,) early strength Portland cement, fine aggregates and coarse aggregates are mixed and subsequently are mixed with 0.3-1 pt. the cement dispersant, and 1.5-6 pts. hardening accerator of a Rhodan salt/nitrite mixture, etc., and water, and kneaded to obtain the ultrahigh early high strength concrete composition having a water/cement ratio of 20-40%, 120-185kg/m3 unit water quantity, 500-900kg/m3 fine aggregates and 800-1200kg/m3 coarse aggregates.;COPYRIGHT: (C)1997,JPO
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机译：解决的问题：为了通过使用水泥，细骨料，粗骨料，由包含由指定式表示的结构单元的水溶性乙烯基共聚体组成的水泥分散剂和以规定比例的硬化促进剂来获得优异的早期强度。 ;解决方案：数均分子量为2000-20000的水溶性乙烯基共聚物的水泥分散剂，是聚合的甲基丙烯酸，甲基丙烯酸甲酯等，其结构单元AD由式I-IV表示（R 1 ，R 2 ，H，CH 3 ，R 3 ，苯基等，M 1 ，M 2 ;碱金属等），由40-65mol。％A，按摩尔计算，2-20％B，5-20％C和10-获得40％的D。接下来，将100重量％的早期强度的波特兰水泥，细骨料和粗骨料混合，随后与0.3-1磅混合。水泥分散剂，重量为1.5-6分。将罗丹盐/亚硝酸盐混合物等与水的固化促进剂捏合，得到水灰比为20-40％，120-185kg / m 3 的超高早期高强度混凝土组合物单位水量，500-900kg / m 3 细骨料和800-1200kg / m 3 粗骨料。版权所有：（C）1997，日本特许厅
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