Synthesis and Properties of an EPEG Slump Retaining Polycarboxylic Acid Superplasticizer
- DOI
- 10.2991/978-94-6463-658-1_78How to use a DOI?
- Keywords
- EPEG; conversion rate; molecular chain distribution; dispersion retention
- Abstract
In order to meet the special requirements for long-term slump retention of concrete under extreme conditions such as long distance transportation and super high-rise pumping construction, an EPEG slump retaining polycarboxylic acid superplasticizer (LT-PCE) was prepared by free radical aqueous solution polymerization at room temperature, which used ethylene glycol monovinyl polyoxyethylene ether (EPEG-2400), acrylic acid (AA), hydroxypropyl acrylate (HPA) as comonomers, β-mercaptoethanol as chain transfer agent, hydrogen peroxide and binary complexes of ferrous sulfate/formaldehyde sodium bisulfate as oxidation-reduction system. The molecular structure and mechanical properties of LT-PCE and commercial high performance EPEG polycarboxylic acid slump retaining agent (CA-PCE) were compared and analyzed. The results showed that LT-PCE was a polymer containing a variety of functional groups, and its molecular chain was dominated by ether macromonomers and supplemented by ester macromonomers. Compared with CA-PCE, LT-PCE has significantly higher conversion rate and more uniform molecular chain distribution, which can significantly improve the dispersion retention performance and mechanical strength of concrete.
- Copyright
- © 2025 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
TY - CONF AU - Qian Zhao AU - Xiang-Jie Meng PY - 2025 DA - 2025/03/03 TI - Synthesis and Properties of an EPEG Slump Retaining Polycarboxylic Acid Superplasticizer BT - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024) PB - Atlantis Press SP - 761 EP - 766 SN - 2352-5401 UR - https://doi.org/10.2991/978-94-6463-658-1_78 DO - 10.2991/978-94-6463-658-1_78 ID - Zhao2025 ER -