Influence of Transport Time on Yield Stress of Cement‑Ground Limestone Paste

被引：0
|
作者：
Hu X. [1 ]
Xiao J. [1 ]
Han K. [1 ]
Zhang Z. [1 ]
Tian C. [2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] Research and Design Institute of Sinohydro Engineering Bureau 8 Co., Ltd., Power Construction Corporation of China, Changsha
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 06期
关键词：
ground limestone; interparticle force; transport time; yield stress;
D O I：
10.3969/j.issn.1007-9629.2022.06.010
中图分类号：
学科分类号：
摘要：
By measuring the yield stress of cement‑ground limestone pastes and calculating the interparticle forces of pastes under different transport time based on EDLVO theory， the mechanism of the change of yield stress of pastes under different transport time was studied. The results show that the yield stress decreases first and then increases with the increase of the total specific surface area. The yield stress of pastes increases with the increase of transport time. There is a good negative correlation between water film thickness of pastes and yield stress. At the same particle spacing， the van der Waals forces and A‑B forces of pastes decreases with increasing content and fineness of ground limestone， while electrostatic force has no obvious change rule. Moreover， the variation of the total interparticle force with different cement‑ground limestone pastes is small with the same particle spacing. The relationship between yield stress and total interparticle forces and average spacing under different transport time is established. © 2022 Tongji University. All rights reserved.
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页码：613 / 620
页数：7
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