常用混凝土外加剂对硅酸盐水泥水化各阶段性能的影咱  

The effect of common concrete admixture to different periods of cement hydration

作　　者：邵宁宁[1] 刘泽[1] 陈雷[1] 王栋民[1] 

机构地区：[1]中国矿业大学北京,北京100083

出　　处：《中国包装科技博览（混凝土技术）》2013年第3期50-54,共5页China Science and Technology Review

摘　　要：现代混凝土的发展和应用离不开混凝土外加剂，但}昆凝土外加剂种类繁多、错综复杂，且对混凝土的影响机理和效果不一，着实已成为混凝土外加剂在实际应用中的难题。本文总结了前人对混凝土外加剂对水泥水化影响机理的研究，并在此基础上对外加剂在水泥水化各阶段的影响进行分析，重点从外加剂对C，A和C，S水化的影响进行分析，进而总结出混凝土外加剂对新拌混凝土流动性、凝结时间、以及后期强度的影响。所有的这些工作都是为了使研究人员或者工程人员在实际应用中，能够快速实现对一种外加剂的选择或多种外加剂的复配，从而实现对新拌混凝土流动性、凝结时间以及后期强度的控制，以满足工程的需要。The development and application of mordern concrete cannot leave the concrete admixture.However, the wide range of admixtures plus the differences of their effect and function mechanism have become difficult problems in using these admixtures.This paper presents many researches about the admixtures＇ influence to concrete set by previous reseachers.The effects of admixtures to different periods of cement hydration are analysed on the basis of previous work, the effects of admixtures to the hydration of C3A and C3S are specially analysed.As a result, the effect of concrete admixture to the fluidity and setting time of fresh concrete as well as its long-term strength are summarised.All of these work aims to help researchers and engineers quickly and easily select one kind of admixture or the combination of several admixtures, so that to control the fluidity, setting time and long-term strength of concrete to meet the need of real engineering.

关 键 词：混凝土外加剂 水泥水化阶段 作用机理 性能影响 

分 类 号：TU528.042[建筑科学—建筑技术科学]