Effect of Temperatures on Role of Ground Limestone in the Structural Build-up of Fresh Cement Pastes

被引：0

作者：

Xiao J. ^{[1
]}

Zuo S. ^{[1
]}

Wang D. ^{[1
]}

Ma W. ^{[2
]}

Peng Y. ^{[2
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha

[2] Communication and Signal Construction Corporation Limited, Changsha

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2019年 / 22卷 / 03期

关键词：

Ground limestone; Static yield stress; Structural build-up; Temperature; Viscoelasticity;

D O I：

10.3969/j.issn.1007-9629.2019.03.001

中图分类号：

学科分类号：

摘要：

The rheology of cement-ground limestone pastes was tested at a constant shear rate by means of RHEOLAB QC rotating viscometer at various temperatures, and the static yield stress, structural build-up rate and plastic strain energy of pastes were measured to characterize the effect of temperatures on role of ground limestone in structural build-up of pastes. The results show that the cement-ground limestone paste is a viscoelastic fluid at shear rate of 0.1s-1. The temperature affects the role of ground limestone in cement paste, with the increase of ground limestone content, the static yield stress of the paste increases at 20℃, but there is little effect at 5℃, 10℃ and 30℃. At 20℃ and 30℃, the structural build-up rate increases first and then decreases with the increasing ground limestone content, and the structural build-up rate reaches the maximum when the ground limestone content is 10%, and the ground limestone content has no effect basically at 5℃ and 10℃. The plastic strain energy increases with increasing ground limestone content at 5℃, 10℃, and 20℃, but it basically remains stable at 30℃. When the ground limestone content is the same, the plastic strain energy increases first and then decreases with the rise temperature and reaches the maximum at 10℃. © 2019, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：327 / 332and347

共 18 条

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