Cement and aggregates are mixed with each other by the use of a dispersant to the effect of water reduction and prevention of slump loss, the dispersant comprising (1) (I), (Ila) and an amine reaction terminator of (Ilb), (Ilc), (IVg) and/or (IVh) ; (2) (I), (Ilb) and/or (Ilc) and (Ille) and/or (Illf) ; or (3) (I), (Ila) and (Ille) and/or (Illf), in which formulae, R is hydrogen or an alkyl having 1 to 6 carbon atoms ; X is an alkali metal ; X1 is hydrogen, an alkyl having 1 to 6 carbon atoms, carboxylic group, an alkali metal salt carboxylate, sulfonic group, an alkali metal salt sulfonate, hydroxy or methoxy ; Y1 is carboxyic or an alkali metal salt carboxylate, sulfonic or an alkali metal salt sulfonate ; Y is hydrogen or an alkali metal ; Z is hydrogen, an alkyl having 1 to 6 carbon atoms or -CH2S03M ; and M is hydrogen or an alkali metal.
通过使用分散剂将
水泥和集料相互混合,以达到减
水和防止坍落度损失的效果,分散剂包括 (1) (I)、(Ila) 和 (Ilb)、(Ilc)、(IVg) 和/或 (IVh) 的胺反应
终止剂;(2) (I)、(Ilb)和/或(Ilc)和(Ille)和/或(Illf);或 (3) (I)、(Ila)和(Ille)和/或(Illf),在这些式中,R 是氢或具有 1 至 6 个碳原子的烷基;X 是碱
金属;X1 是氢、具有 1 至 6 个碳原子的烷基、羧基、碱
金属盐
羧酸盐、
磺酸基、碱
金属盐
磺酸盐、羟基或甲氧基;Y1 是羧基或碱
金属盐
羧酸盐、
磺酸基或碱
金属盐
磺酸盐;Y 是氢或碱
金属;Z 是氢、具有 1 至 6 个碳原子的烷基或-CH2S03M;M 是氢或碱
金属。