1. On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops
- Author
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Nazia Hossain, Banjo A. Akinyemi, Ahmad Rashedi, Ali Raza, J. Naveen, and Umer Rafique
- Subjects
Materials science ,Polymers and Plastics ,geopolymer concrete ,Composite number ,Glass fiber ,Organic chemistry ,020101 civil engineering ,02 engineering and technology ,Article ,0201 civil engineering ,QD241-441 ,GFRP ,structure ,Composite material ,Ductility ,Reinforcement ,Aggregate (composite) ,General Chemistry ,Fibre-reinforced plastic ,021001 nanoscience & nanotechnology ,failure ,Geopolymer ,material properties ,strength ,0210 nano-technology ,Material properties ,recycled aggregate concrete - Abstract
Structural members comprising geopolymer recycled aggregate concrete (RAC) reinforced with glass fiber-reinforced polymer (GFRP) bars have not been investigated appropriately for axial compressive loading cases. The present study addresses this knowledge gap by evaluating the structural efficiency of GFRP-reinforced geopolymer recycled aggregate concrete (GGRAC)-based members subjected to axial compressive loading. A total of nine compressive members (250 mm in cross-section and 1150 mm in height) were constructed to examine the effect of the number of longitudinal GFRP bars and the vertical spacing of transverse GFRP hoops/ties. The experimental results portrayed that the ductility of GGRAC compressive members improved with the reduction in the pitch of GFRP hoops. The axial load-carrying capacity (LCC) of GGRAC compressive members increased by increasing the number of GFRP bars up to eight (corresponding to a reinforcement ratio of 2.11%) while it decreased by using ten longitudinal GFRP bars (corresponding to a reinforcement ratio of 2.65%). Additionally, an empirical model was suggested to predict the axial LCC of GGRAC compressive members based on a large amount of experimental data of similar members. The experimental results and related theoretical predictions substantially prove the applicability and accuracy of the proposed model. The proposed column represents a feasible structural member in terms of material availability and environmental sustainability.
- Published
- 2021
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