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Article

Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate

by 1,2,3, 1,2,3, 1,2,3, 1,2,3, 1,2,3,* and 1,2,3
1
College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China
2
Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China
3
Key Laboratory for Resilient Infrastructures of Coastal Cities, Ministry of Education, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Academic Editor: Wei Zhang
Polymers 2022, 14(19), 3964; https://doi.org/10.3390/polym14193964
Received: 23 August 2022 / Revised: 15 September 2022 / Accepted: 16 September 2022 / Published: 22 September 2022
(This article belongs to the Special Issue Recycling and Reuse of Fiber Reinforced Polymer Wastes)
To promote the sustainable development of the construction industry, concrete incorporating polyethylene (PE) fiber-strengthened recycled coarse aggregate (SRCA) and seawater and sea sand (SWSS) is prepared. The usage of SRCA significantly improves the mechanical performance of concrete. The strength is improved, and the failure mode of concrete cylinders is also remarkably altered. The incorporation of SWSS that alleviates the shortage of freshwater and river sand slightly reduces the mechanical strength of concrete at 28 and 90 days, while the replacement of cement by 35% limestone calcined clay cement (LC3) overcomes this drawback. The compressive strength of concrete is further enhanced, and the pore structure is refined. The introduction of LC3 also promotes the formation of Friedel’s salt, which could improve the chloride binding capacity of concrete using SWSS. Furthermore, the stress-strain relationship of sustainable concrete is analyzed, and the experimental results are compared with the commonly used constitutive models. The predictive constitutive models are proposed to effectively describe the mechanical performance of sustainable concrete. View Full-Text
Keywords: recycled coarse aggregate (RCA); limestone calcined clay cement (LC3); seawater and sea sand (SWSS); strength; stress-strain relationship; constitutive model recycled coarse aggregate (RCA); limestone calcined clay cement (LC3); seawater and sea sand (SWSS); strength; stress-strain relationship; constitutive model
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MDPI and ACS Style

Zhou, Q.; Zhou, Y.; Guan, Z.; Xing, F.; Guo, M.; Hu, B. Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate. Polymers 2022, 14, 3964. https://doi.org/10.3390/polym14193964

AMA Style

Zhou Q, Zhou Y, Guan Z, Xing F, Guo M, Hu B. Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate. Polymers. 2022; 14(19):3964. https://doi.org/10.3390/polym14193964

Chicago/Turabian Style

Zhou, Qimi, Yingwu Zhou, Zhipei Guan, Feng Xing, Menghuan Guo, and Biao Hu. 2022. "Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate" Polymers 14, no. 19: 3964. https://doi.org/10.3390/polym14193964

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