Relationship between Particle Characteristics and Rheological Properties of Cement-Limestone Powder Pastes

被引：0
|
作者：
Xiao J. [1 ]
Zhang Z. [1 ]
Han K. [1 ]
Tian C. [2 ]
Qiu K. [2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] Research and Design Institute, China Hydropower Engineering Bureau 8 Co., Ltd., Changsha
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2021年 / 24卷 / 01期
关键词：
Limestone powder; Packing density; Particles size distribution; Rheological property; Water film thickness;
D O I：
10.3969/j.issn.1007-9629.2021.01.002
中图分类号：
学科分类号：
摘要：
Yield stress and consistency of cement-limestone powder pastes were measured by RHEOLAB QC rotational viscometer. The relationship between particle size distribution, packing density and rheological properties was studied. The results show that the addition of limestone powder makes the particle distribution wider and improvement of the state of particle accumulation. The linear correlation between particle size distribution coefficient and yield stress and consistency is not close, the correlation coefficient is only 0.60061 and 0.69962. The correlation coefficient between the packing density and the yield stress and consistency is 0.83058 and 0.84654, which is closer than that of the particle size distribution coefficient. The relationship between water film thickness and rheological properties cannot be described by linear function, among which the yield stress and consistency of the cement paste with 411m2/kg limestone powder are decreased and the water film thickness is increased. The yield stress and consistency of the cement paste adding limestone fineness powder of 807, 1007m2/kg decrease, the water film thickness first increases and then decreases, and the yield stress, consistency and water film thickness decrease simultaneously. © 2021, Editorial Department of Journal of Building Materials. All right reserved.
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页码：7 / 13
页数：6
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