缓凝作用 meaning in Chinese
delayed coagulation
set retarding
Examples
- The result shows , for this composite cement system , retarding action of dihydrate gypsum is more obvious than that of anhydrite , meanwhile , anhydrite tends to cause setting time short and water needed increased
结果表明：二水石膏对该种复合体系水泥的缓凝作用比硬石膏明显，硬石膏易引起复合体系水泥急凝和需水量增大。 - The shrinkage reducing rate can reach to 70 % at the 7th day , and the shrinkage reducing rate can reach to 40 % at the 28th day . it doesn ’ t reduce the intension of the concrete . it can have an ability of 10 18 % of reducing water rate
通过对比试验发现,聚丙烯酸盐类减缩剂的最佳掺量为水泥质量的1 . 2 % , 7天减缩率可达70 % , 28天减缩率可达40 % ,且不降低混凝土的强度,具有10 18 %的减水率,有一定的缓凝作用。 - Abstract : based on composite testing of naphthalene superplasticizer and different retarders as well as retarding water reducer , in which the overall amount of admixture is certain , this paper analyzes the influence of these multicomponent admixtures on flowability of neat cement 、 retarding action and development of strength of colloidal mortar . the result shows that compatibilities of different components are different , and composition effects are also different
文摘:在总掺量一定的情况下，就萘磺酸盐高效减水剂与不同缓凝组分、缓凝型减水剂等复合后对水泥净浆流动度、缓凝作用、胶砂强度发展等性能的影响作用进行了试验分析，结果表明各不同组份复合的相容性不同，复合效应也存在差别。 - Through the analyzing the macro - structure to micro - structure , the author considers that retarding mechanism of citric acid is that citric acid and ca in the gypsum form the complexant ion , and hinder the crystallization center of dihydrate crystal bigger ; that of sodium tripolyphosphate is that it combined with ca , hinders the dissolve of hemihydrate . formation and growth of crystallization center ; that of bone glue is the glue - protection and chemical absorption action of active group , which also retards the formation and growth of crystallization center
通过宏观到微观的分析，笔者认为，柠檬酸的缓凝作用的原因主要在于柠檬酸与钙形成络合离子，影响了二水石膏晶体的晶核长大过程；多聚磷酸钠与钙形成某种复盐，对于石膏晶体的溶解、成核和长大过程均有强烈的阻碍影响；骨胶则在于胶体对半水石膏的包裹和活性基团的化学吸附，使二水石膏晶体的成核和长大困难。