Compressive stress-strain behavior of RFAC after high temperature
Jiongfeng Liang,Liuhaoxiang Wang,Zhibin Ling,Wei Li,Wenrui Yang
Abstract
This paper discusses the effect of high temperatures (Ts) on the compressive strength and stress-strain curve of
recycled fine aggregate concrete (RFAC), based on the experimental results. A total of 90 prisms (100 mmx100 mmx300 mm) were tested. The results show that the compressive strength and elastic modulus of RFAC specimens decreased significantly with increasing T values. As T increased, the strain corresponding to peak stress decreased first when T<200oC and then increased afterwards. With increasing T values, the stress-strain curves became flat gradually, the peak stress dropped gradually, and ep decreased when T<200oC and increased in the T range of 400-800oC. A stress-strain relations for RFAC exposed to high Ts is proposed, which agree quite well with the test results and may be used to practical applications.
Key Words
compressive strength; concrete; recycled fine aggregate; stress-strain relationship; temperature
Address
Jiongfeng Liang: Jiangsu Province Key Laboratory of Structure Engineering, Suzhou, China; State Key Laboratory of Green Building in Western China, Xian University of Architecture & Technology, Xian, China; Faculty of Civil & Architecture Engineering, East China University of Technology, Nanchang, China
Liuhaoxiang Wang: Faculty of Civil & Architecture Engineering, East China University of Technology, Nanchang, China
Zhibin Ling, Wei Li: Jiangsu Province Key Laboratory of Structure Engineering, Suzhou, China
Wenrui Yang: College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, Zhejiang, China
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