Abstract
The glass fibre reinforced polymer (GFRP) bars in construction are increasing in popularity due to their excellent corrosion resistance, high tensile-strength-to-weight ratio and low maintenance. Geopolymer is a modern cementitious material that is known for its corrosion resistance and low carbon footprint. Combining the two could produce a green yet durable composite material that can be applied to aggressive environments such as the coastal zones in Australia. This paper investigates experimentally the load-moment interaction of the GFRP reinforced air cured geopolymer concrete columns. Eleven 1/2-scale specimens were made to study the behaviour of the reinforced geopolymer concrete columns under combined loading. Three different stirrup spacings, 75mm, 150mm, and 250mm, were examined. Effective confinement has been achieved by reducing the stirrup spacing where high strains were measured in the concentric columns with closely spaced stirrups (i.e. 75mm). A comparison between the experimental data against international design codes showed that such codes were conservative when ignoring the compressive strengths of the longitudinal GFRP bars. The experimental results were better represented when the compressive strengths of the bars were included. It was found that the GFRP reinforced geopolymer concrete columns exhibited 10.8% average increase in strength with respect to plain concrete sections.
| Original language | English |
|---|---|
| Pages | 2029-2037 |
| Number of pages | 9 |
| State | Published - 2019 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 by the fib. All rights reserved.
Keywords
- Column
- Geopolymer
- GFRP
- Interaction diagram
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
