Effects of Organosilane-modified PCE on the Fluidity and Hydration Properties of Cement-Fly Ash Composite Binder

被引：0
作者：
Yan He
Shuhua Liu
Tao Ji
Yaning Kong
Liangliang Shui
机构：
[1] Suzhou University of Science and Technology,School of Civil Engineering
[2] China Building Materials Academy,State Key Laboratory of Green Building Materials
[3] Wuhan University of Technology,State Key Laboratory of Silicate Materials for Architectures
[4] Wuhan University,Hubei Key Laboratory of Water System Science for Sponge City Construction
[5] Wuhan University,State Key Laboratory of Water Resources and Hydropower Engineering Science
[6] Nanjing Institute of Technology,School of Architecture and Engineering
[7] China West Construction Academy of Building Materials,undefined
[8] Shanghai Municipal Engineering Design Institute (Group) Co. Ltd.,undefined
来源：
Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2020年 / 35卷
关键词：
cement; fly ash; organosilane-modified PCE; fluidity; hydration properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Effects of organosilane-modified PCE (OS-PCE) on the fluidity and the hydration properties of cement-fly ash (FA) composite binder were systematically analyzed. The experimental results show that OS-PCE possesses respectively 36.98% and 36.67% higher saturated adsorption amount on cement and FA, in comparison with ordinary PCE, and can contribute to higher fluidity of cement-FA composite binder. The addition of OS-PCE retards hydration process of cement-FA composite binder proportionally with the dosage of OS-PCE, but promotes the hydration kinetics of the composite binder. The reactivity enhancement is attributed to the well-dispersed FA by OS-PCE, which provides more nucleation sites for the reaction of heterogeneous C-S-H and enhances the contact with water to react with CH forming pozzolanic C-S-H. Well-distributed hydration products are exhibited in the hardened binder added with OS-PCE, with a large number of hydrated gels uniformly fill in the pores and gaps, which improves the compaction of the hardened structure.
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页码：1081 / 1089
页数：8
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