Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)

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Study on the influence of polycarboxylate superplasticizer molecular weight on microstructure and application performance

Authors
Geli Li2, 1, *, Chuandeng Wu1, 2, Zhiqun Lin1, 2, Yunhui Fang1, 2
1KZJ New Materials Co., Ltd, Xiamen, 361101, China
2Xiamen Key Laboratory of Engineering Additives, Xiamen, 361101, China
*Corresponding author. Email: ligeli2006@126.com
Corresponding Author
Geli Li
Available Online 30 December 2023.
DOI
10.2991/978-94-6463-336-8_43How to use a DOI?
Keywords
Polycarboxylic acid; molecular weight; microstructure; application performance
Abstract

Polycarboxylic acid samples were prepared using methyl allyl alcohol polyoxyethylene ether (TPEG) and acrylic acid (AA) as raw materials using an redox initiator system (ammonium persulfate sodium hypophosphate). Explored the influence of polycarboxylic acid molecular weight on microstructure and application performance. The experimental results show that as the reaction progresses, the acid ether ratio gradually increases. When the reaction time is 180 min, the carboxyl density is the highest. As the amount of chain transfer increases, the Mark Houwink constant a of polycarboxylate water reducer gradually increases, and its structure gradually shifts from random curling to rigid structure. At the same amount of fixed content, as the molecular weight of polycarboxylic acid decreases, the fluidity of the cement paste gradually increases, and the yield stress gradually decreases. There is a certain difference in adsorption on the surface of cement particles, but the difference is not significant.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
Series
Advances in Engineering Research
Publication Date
30 December 2023
ISBN
978-94-6463-336-8
ISSN
2352-5401
DOI
10.2991/978-94-6463-336-8_43How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Geli Li
AU  - Chuandeng Wu
AU  - Zhiqun Lin
AU  - Yunhui Fang
PY  - 2023
DA  - 2023/12/30
TI  - Study on the influence of polycarboxylate superplasticizer molecular weight on microstructure and application performance
BT  - Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
PB  - Atlantis Press
SP  - 375
EP  - 381
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-336-8_43
DO  - 10.2991/978-94-6463-336-8_43
ID  - Li2023
ER  -