Influence of Polycarboxylate Superplasticizers with Different Carboxylic Density on the Properties of Cement Paste

被引：0

作者：

He Y. ^{[1
]}

Kong Y. ^{[2
]}

Wang X. ^{[2
]}

Shui L. ^{[3
]}

机构：

[1] School of Civil Engineering, Suzhou University of Science and Technology, Suzhou

[2] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai

[3] Shanghai Municipal Engineering Design Institute Co., Ltd., Shanghai

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2018年 / 21卷 / 02期

关键词：

Adsorption amount; Carboxylic density; Fluidity; Hydration property; Polycarboxylate superplasticizer(PCE);

D O I：

10.3969/j.issn.1007-9629.2018.02.002

中图分类号：

学科分类号：

摘要：

A series of polycarboxylate superplasticizers(PCEs) with different carboxylic density have been synthesized through radical copolymerization in aqueous phase. The dispersing capability and the adsorption behavior of the PCEs were analyzed via flow table test and ultraviolet spectrophotometer. The influence of different molecular structured PCEs on the hydration properties of cement paste was studied through isothermal conductive calorimeter and the X-ray diffracmeter (XRD). The results show that higher carboxylic density in PCE molecules leads to greater adsorption amount onto cement surface and a higher dispersing capability in fresh cement paste. Increase in carboxylic density results in enhancement in cement hydration process, which is due to increase in the formation of Ca(OH)2 product, increase in the maximum hydration evolution rate in acceleration period, and increase in the acceleration rate of hydration rate in the early stage of the acceleration period. © 2018, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：185 / 188

页数：3

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