Effect of aluminum sulfate on the hydration of Portland cement, tricalcium silicate and tricalcium aluminate

被引：91

作者：

Liu, Xiaohai ^{[1
]}

Ma, Baoguo ^{[1
]}

Tan, Hongbo ^{[1
]}

Gu, Benqing ^{[1
]}

Zhang, Ting ^{[1
]}

Chen, Pian ^{[1
]}

Li, Hainan ^{[2
]}

Mei, Junpeng ^{[3
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

[2] Wuhan Text Univ, Dept Construct Cost, Wuhan 430200, Peoples R China

[3] Wuhan Univ Sci & Technol, Sch Urban Construct, Wuhan 430200, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 232卷

基金：

中国国家自然科学基金;

关键词：

Aluminum sulfate; Portland cement; C3S; C(3)A; Alkali-free accelerator; ALKALINE SHOTCRETE ACCELERATORS; EARLY AGE HYDRATION; CHLORIDE BINDING; FLY-ASH; MECHANICAL-PROPERTIES; ADMIXTURES; STRENGTH; DURABILITY; SYSTEMS; PASTES;

D O I：

10.1016/j.conbuildmat.2019.117179

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Alkali-free accelerator, mainly composed of aluminum sulfate (AS), is a widely used chemical admixture in the sprayed concrete. Thus, the impact of AS on the cement hydration should be further studied. This research focused on the effect of AS on the hydration reaction of C3S and C(3)A, illustrated by various measurements, including hydration heat, XRD, TGA, and thermodynamic modeling. Results indicated that AS accelerated the C3S hydration by rapidly generating AFt in induction period, and facilitated the C(3)A hydration by producing SO4-AFm and OH-AFm after a short hinderance. These facilitations were integrated into the promotion on cement hydration. The findings could provide guidance for the development of accelerator. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：11

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