Mechanical Behavior of CFRP-Confined Recycled Fly Ash/Slag Based Geopolymer

Posted: 22 Jul 2019

See all articles by Zhuo Tang

Zhuo Tang

School of Civil & Environmental Engineering, University of Sydney Technology

Wengui Li

University of Technology Sydney

Vivian Tam

Western Sydney University - Australia

Date Written: July 20, 2019

Abstract

Although massive research has been conducted on the utilization of recycled aggregate in producing concrete, recycled aggregate concretehas so far been mainly limited to non-structural applications due to its well-known disadvantages including the relatively low stiffness and strength. To explore the potential applications of such material in structural members, lateral confinement such as using fiber-reinforced polymer (FRP) could be an effective way by significantly improving concrete strength and ductility. Thus,this paper presents the results of axial compression test on recycled aggregate concrete based on fly ash/slag geopolymer, namely geopolymeric recycled aggregate concrete (GRAC), confined by carbon FRP. GRAC, the combined utilization of environmentally-friendly geopolymer binders and recycled aggregate, is beneficial for the development of sustainable concrete, as well as alleviate the environmental issue caused by industrial by-product and construction and demolition waste.The objective of this study is to evaluate the mechanical properties of carbon FRP-confined GRAC under axial compression, such as the failure pattern, axial and lateral strain response, and ultimate strength. The main parameters in the test are the type of coarse aggregate (normal coarse aggregate or recycled coarse aggregate), the slag content, and the CFRP jacket stiffness. Research findings indicate that both the strength and deformation of GRAC confined by CFRP wrap are obviously improved.

Keywords: CFRP, Recycled aggregate, geopolymer, axial compression

Suggested Citation

Tang, Zhuo and Li, Wengui and Tam, Vivian, Mechanical Behavior of CFRP-Confined Recycled Fly Ash/Slag Based Geopolymer (July 20, 2019). Abstract Proceedings of 2019 International Conference on Resource Sustainability - Cities (icRS Cities). Available at SSRN: https://ssrn.com/abstract=3423191

Zhuo Tang

School of Civil & Environmental Engineering, University of Sydney Technology ( email )

NSW 2007
Australia

Wengui Li (Contact Author)

University of Technology Sydney ( email )

15 Broadway, Ultimo
PO Box 123
Sydney, NSW 2007
Australia

Vivian Tam

Western Sydney University - Australia ( email )

PO Box 10
Kingswood, NSW 2747
Australia

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