Rheological properties of cement-ground limestone paste with nano-CaCO3

被引：0
|
作者：
Xiao J. [1 ]
Zhou S. [1 ,3 ]
Wang D. [1 ]
Peng Y. [2 ]
Fan B. [2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] Communication and Signal Construction Corporation Limited, Changsha
[3] School of Civil Engineering, Shangqiu Institute of Technology, Shangqiu
来源：
Xiao, Jia (jiaxiaog2007@163.com) | 2018年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 35期
关键词：
Consistency coefficient; Dynamic yield stress; Ground limestone; Nano-CaCO[!sub]3[!/sub; Thixotropy;
D O I：
10.13801/j.cnki.fhclxb.20171124.001
中图分类号：
学科分类号：
摘要：
The rheological curves of the cement-ground limestone paste were determined by Rheolab QC rotation viscometer. Dynamic yield stress, consistency coefficient and rheological index of the paste were obtained by fitting the measured τ-γ curves based on Herschel-Bulkley model and thixotropy was characterized by the area of thixotropic hysteresis loop. The results indicate that: with the increase of ground limestone content, dynamic yield stress decreases gradually, consistency coefficient increases, while thixotropy increases and then decreases. The addition of nano-CaCO3 has little effect on the rheological type of the cement-ground limestone paste and they both present a shear thinning behavior. With the increase of nano-CaCO3 content, dynamic yield stress and consistency coefficient increase gradually, while thixotropy decreases. The addition of nano-CaCO3 results in a poor rheological properties of the cement-ground limestone pastes but enhances its stability. © 2018, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：2185 / 2190
页数：5
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