Abstract
Bond behavior is an important issue in the design and performance of reinforced concrete structures. In this research the bond property between glass fibre reinforced polymer (GFRP) bars, a corrosion resistant substitute to steel bars, and fly-ash based Geopolymer Cement (GPC) concrete, a more environmental friendly alternative to Ordinary Portland Cement (OPC) concrete, is investigated. When compared to OPC concrete, fly-ash based GPC concrete has a different micro structures and hydration process, which may affect its bond performance. A total of 18 pull-out specimens containing 16 mm GFRP rebar embedded in GPC and OPC concrete cylinders with 100 mm diameter and 170 mm height were prepared. Embedment lengths of three, six, and nine times the rebar diameter were taken as the main test variables. For each specimen, the test results include the bond failure mode, the average bond strength, the slip at the loaded and free end and the bond–slip relationship curves. With these test results, the performance of GFRP in GPC and OPC concretes are compared. Furthermore, the effect of embedment length on bond strength of GPC and OPC concrete is carefully investigated. The average bond strength values revealed the higher bond performance of GFRP bars in GPC concrete.
| Original language | English |
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| Title of host publication | 10th International Conference on Composite Science and Technology |
| Place of Publication | Lisbon, Portugal |
| Pages | 1-8 |
| Number of pages | 8 |
| Publication status | Published - 2015 |
| Externally published | Yes |