新拌水泥浆触变、反触变及其交错行为的解析

ANALYSIS OF THIXOTROPIC,ANTI-THIXOTROPIC AND INTERLEAVING BEHAVIOURS ON FRESH CEMENT PASTES

本文采用'台阶法循环'测试方法研究了新拌水泥浆的触变性和反触变性,发现不同的触变-反触变交错行为对应着不同的浆体结构状态.试验解析了各种循环曲线的产生过程,指出反触变行为不宜作为浆体的物性参数,因为它是剪切稠化作用所致,其大小决定于剪切强度和时间.

This paper studied properties of thixotropy and anti-thixotropy of fresh cement pastes.It was found that the inteleaving behaviours of thixotropy and anti- thixotropy were related to the different microstructure of pastes.The occurrence of various cycle curves was analysed by tests.It was confirmed that anti-thixo- tropic behaviour was not appropriate to be as a characteristic parameter of the paste structure because it resulted from shear thickening,and its magnitude depended upon the intensity and time of shear.