A New Type of Mineral Admixture and Its Impact on the Carbonation Resistance of EPS Concrete

Haijie He, Yuxuan Wang, Ji Yuan (), Ke Xu, Shifang Wang (), Hongxia Qiao, Tao Wu, Jie Yang (), Junding Liu, Jing Yu and Bin Wang
Additional contact information
Haijie He: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
Yuxuan Wang: The Architectural Design & Research Institute of Zhejiang University, Zhejiang University, Hangzhou 310000, China
Ji Yuan: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
Ke Xu: Zhejiang Fang Yuan New Materials Co., Ltd., Taizhou 318000, China
Shifang Wang: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
Hongxia Qiao: Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730000, China
Tao Wu: Jiangsu Province Engineering Research Center of Geoenvironmental Disaster Prevention and Remediation, Jiangsu University of Science and Technology, Zhenjiang 212000, China
Jie Yang: Zhejiang Fang Yuan New Materials Co., Ltd., Taizhou 318000, China
Junding Liu: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
Jing Yu: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China
Bin Wang: College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, China

Sustainability, 2023, vol. 15, issue 9, 1-17

Abstract: In this study, the effect of microbead dosages (0%, 5%, 10%, 15%, and 20%) on the carbonation resistance of expanded polystyrene (EPS) concrete was investigated. Five groups of EPS concrete specimens were produced and underwent rapid carbonation testing. The carbonation depth and strength after carbonation of the specimens were measured at different carbonation ages (7 days, 14 days, and 28 days) and analyzed to determine the effect of microbead dosages and compressive strength on carbonation resistance. Results indicated that the carbonation depth increased with the progression of carbonation time. The introduction of microbeads was found to significantly improve the carbonation resistance of EPS concrete, leading to a reduction in carbonation depth of over 50% after 28 days and an increase in strength after carbonation by 18–56%. A relative compressive strength model for EPS concrete after carbonation was developed, which could accurately characterize the growth of compressive strength. Based on the analysis of EPS concrete carbonation depth data, a prediction model for the carbonation depth of EPS concrete with microbead dosage was established through fitting, providing improved accuracy in predicting carbonation resistance. The microstructure of EPS concrete was also examined using scanning electron microscopy to uncover the underlying mechanisms of microbead enhancement on carbonation resistance. These findings have potential implications for future research and engineering applications in the carbonation resistance of EPS concrete.

Keywords: EPS concrete; microbead; admixture; carbonization; compressive strength; prediction model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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