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The mechanical properties of GFRP bars embedded in geopolymer concrete after high temperature exposure by Zike Wang; Kang Wang; Jun Zhao; Shuaibin Wang; Eskinder Desta Shumuye; Zhaohui Yang is a Engineering article available to read on EtoBox.

What is The mechanical properties of GFRP bars embedded in geopolymer concrete after high temperature exposure about?

Geopolymer concrete prepared with fly ash and slag has exhibited excellent thermostability and thermal insulation performance. Through combining geopolymer concrete with glass fiber reinforced polymer (GFRP) bars, the existing problems like high energy consumption, massive CO 2 emission and steel bars corrosion in traditional reinforced concrete structures can be solved. To investigate the mechanical properties of GFRP bars embedded in geopolymer concrete after high temperature exposure, a test was conducted on 419 specimens in this study. Factors that influence the performance include exposure temperature, exposure time and type of concrete cover. The results demonstrated that the tensile properties of bare GFRP bars decreased significantly in the temperature range from 400 • C to 600 • C, and the ratio of tensile strength loss was as high as 50%-90%. The geopolymer concrete cover can effectively slow down and mitigate the degradation in tensile strength and elastic modulus of GFRP bars after high temperature exposure (400-600 • C), but this effect weakens following the rise in exposure temperature and time. In addition, the degradation mechanism of GFRP bars within geopolymer con

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Author

Zike Wang; Kang Wang; Jun Zhao; Shuaibin Wang; Eskinder Desta Shumuye; Zhaohui Yang

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)