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Accession number:
20134917057778
Title: Effect of sulfate on dispersity and adsorption capacity of superplasticizer
Authors: Jiang, Nan1, 2; Wang, Zhi1 ; Wang, Linlong3; Kao, Youzhe1; Qian, Jueshi3
Author affiliation: 1 College of Chemistry and Chemical Engineering Chongqing University, Chongqing 400044, China
2 China Automotive Engineering Research Institute Co., Ltd, Chongqing 401122, China
3 College of Material Science and Engineering Chongqing University, Chongqing 400045, China
Corresponding author: Wang, Z. (cquwangzhi@126.com)
Source title: Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Abbreviated source title: Kuei Suan Jen Hsueh Pao
Volume: 41
Issue: 11
Issue date: November 2013
Publication year: 2013
Pages: 1521-1526
Language: Chinese
ISSN: 04545648
CODEN: KSYHA5
Document type: Journal article (JA)
Publisher: Chinese Ceramic Society, Baiwanzhuang, Beijing, 100831, China
Abstract: The effect of sulfate on the fluidity of cement paste with superplasticizer and the adsorption capacity of superplasticizer by calcium silicate hydrates were investigated. The results show that Na2SO4 has a pronounced negative effect on the dispersity and adsorption of superplasticizer. However, the effect of CaSO4 · 2H2O on the dispersity and adsorption capacity of superplasticizer is slight. It is indicated that the competitive adsorption between sulfate and superplasticizer, the aggregation behavior of superplasticizer and the increase of Ca2+ dissolved are due to the effect of sulfate on the dispersity of superplasticizer. It is suggested that the dosage of Na2SO4 as an early strength agent should be strictly controlled in practical engineering in order to ensure the cement paste maintain with a high dispersity.
Number of references: 8
Main heading: Sulfur compounds
Controlled terms: Adsorption - Hydrates - Sodium
Uncontrolled terms: Adsorption capacities - Aggregation behavior - Competitive adsorption - Polycarboxylate-type superplasticizer - Sulfates
Classification code: 549.1 Alkali Metals - 802.3 Chemical Operations - 804 Chemical Products Generally
DOI: 10.7521/j.issn.0454-5648.2013.11.10
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc. |
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