Time-dependent Static and Dynamic Rheological Behavior of Cement Paste with Low Water-Cement Ratio

被引：0

作者：

Chen, Cuicui ^{[1
,2
]}

Zhang, Qianqian ^{[1
,2
]}

Yang, Yong ^{[3
]}

Shu, Xin ^{[1
,2
]}

Ran, Qianping ^{[3
]}

机构：

[1] State Key Laboratory of High Performance Civil Engineering Materials, Nanjing

[2] Jiangsu Sobute New Materials Co., Ltd., Nanjing

[3] School of Materials Science and Engineering, Southeast University, Nanjing

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 15期

关键词：

cement paste; dynamic yield stress; low water-cement ratio; static yield stress; storage modulus;

D O I：

10.11896/cldb.23040237

中图分类号：

学科分类号：

摘要：

Based on the flow spread, static yield stress, and small amplitude oscillatory shear test, the influence of water-cement ratio and the dosage of superplasticizer on the time-dependent rheological behavior of cement paste was studied, and the rheological behavior of cement paste with low water-cement ratio was discussed. The results show that there were significant differences in the time-dependent flow behavior of paste with the same initial flow spread but different superplasticizer dosage. The loss of fluidity over time of paste with an extremely low water-cement ratio was more significant, but could be largely reduced as more superplasticizer was added. Based on static yield stress and the storage modulus G’, the evolution of the static rheological behavior of paste could be characterized. It was found that the colloidal surface interactions and the bridging effect of the hydration product determine the strength development of particle network. The static yield stress and storage modulus paste with low water-cement ratio increase significantly with time. Increasing the dosage of superplasticizer could increase the particle spacing, and inhibit the early hydration of cement, which was helpful to delay the development of particle network. It is believed that the differences in the underlying mechanism that affect static and dynamic rheological behavior lead to different evolution of static and dynamic rheological behavior with time, in which the bridging effect of hydration products is a key factor. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

共 22 条

[1]

Lowke D, Krankel T, Gehlen C, Et al., Design, production and placement of self-consolidating concrete, (2010)

[2]

Mahaut F, Mokeddem S, Chateau X, Et al., Cement and concrete research, 38, 11, (2008)

[3]

Megid W A, Khayat K H., Construction and Building Materials, 196, (2019)

[4]

Liu J, Wang K, Zhang Q, Et al., Construction and Building Materials, 149, (2017)

[5]

Wang R, Gao X, Huang H, Et al., Construction and Building Materials, 144, (2017)

[6]

Wang R, Gao X., Applied Sciences, 6, 216, (2016)

[7]

Roussel N, Ovarlez G, Garrault S, Et al., Cement and Concrete Research, 42, 1, (2012)

[8]

Mantellato S, Palacios M, Flatt R J., Materials and Structures, 52, 1, (2019)

[9]

Qian Y, Lesage K, El Cheikh K, Et al., Cement and Concrete Research, 107, (2018)

[10]

Mewis J, Wagner N J., Advances in Colloid and Interface Science, 147, (2009)

← 1 2 3 →