Abstract
Fiber reinforced polymer (FRP) is a prevalent material for strengthening or retrofitting concrete structures. It has been found that the effectiveness of entire strengthening or retrofitting scheme highly depends on the bond performance of concrete-epoxy interface. During service life, structures are exposed to complicated and unavoidable mechanical and environmental situations that can cause bond deterioration. In order to ensure the structural safety in a long run, a comprehensive experiment focusing on the coupled effect of sustained load and moisture on the bond property of concrete-epoxy interface is conducted. A drastic deterioration of concrete-epoxy interfacial fracture toughness, up to 77%, is observed under coupled sustained load and moisture exposure. Based on our experimental investigation, a predictive model is developed to describe the bond property variations of concrete-epoxy interface against long-term sustained load and moisture. The proposed predictive model can be used to obtain a more reliable and accurate service life prediction and maintenance planning for FRP-bonded concrete structures.
| Original language | English |
|---|---|
| Pages (from-to) | 287-297 |
| Number of pages | 11 |
| Journal | Cement and Concrete Composites |
| Volume | 80 |
| DOIs | |
| State | Published - 1 Jul 2017 |
| Externally published | Yes |
Keywords
- Concrete-epoxy interface
- Debonding
- Moisture
- Sustained load
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