Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings
Abstract
:1. Introduction
2. Experimental Program
2.1. Materials
- Cement, fine aggregate and coarse aggregate
2.2. Specimens Preparation
2.2.1. Specimens Preparation for Experiment I
- Casting of CFRC slabs
- Pre-cracking of CFRC slabs
- Fabrication of FFRP-CFRC slabs
2.2.2. Specimens Preparation for Experiment II
2.3. Experimental Set-Up
2.3.1. Impact Test Set-Up for Experiment I
2.3.2. Impact Test Set-Up for Experiment II
3. Experiment Results and Discussion
3.1. Experiment I
3.1.1. Impact Force Time Histories
3.1.2. Deflection and Damage Development
3.2. Experiment II
3.2.1. Impact Force Time Histories
3.2.2. Strain Time History
3.2.3. Analytical Modelling
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Properties | Epoxy System | |
---|---|---|
20LV Resin | Slow Hardener | |
Elastic modulus (GPa) | 3.5 | |
Tensile strength (MPa) | 73 | |
Strain to failure (%) | 3.5 | |
Cured density (g/cm3) | 1.144 | |
Linear shrinkage (%) | 1.765 | |
Barcol hardness | 27 | |
Density (g/cm3) | 1.123 | 0.936 |
Volume ratio | 100 | 31.4 |
Viscosity @20 °C (cP) | 1010–1070 | 22–24 |
Specimen Type | Water (kg/m3) | Cement (kg/m3) | Coarse Aggregate (kg/m3) | Fine Aggregate (kg/m3) | Coconut Fibre (kg/m3) |
---|---|---|---|---|---|
CFRC | 222.3 | 427.5 | 855 | 855 | 12.83 |
Specimen Group | Experiment Group | No. of Specimens | Concrete Core Dimension | FFRP Area (m2) |
---|---|---|---|---|
CFRC | 3 | 600 mm × 300 mm × 50 mm | - | |
G1 | Experiment I | 3 | 600 mm × 300 mm × 50 mm | 0.5 |
G2 | 3 | 600 mm × 300 mm × 50 mm | 0.5 | |
D1 | Experiment II | 2 | 600 mm × 600 mm × 50 mm | - |
D2 | 2 | 600 mm × 600 mm × 50 mm | 1.5 | |
D3 | 2 | 600 mm × 600 mm × 50 mm | 1.5 | |
D4 | 2 | 600 mm × 600 mm × 50 mm | 1.5 |
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Wang, W.; Mo, Z.; Chouw, N.; Jayaraman, K. Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings. Materials 2021, 14, 6212. https://doi.org/10.3390/ma14206212
Wang W, Mo Z, Chouw N, Jayaraman K. Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings. Materials. 2021; 14(20):6212. https://doi.org/10.3390/ma14206212
Chicago/Turabian StyleWang, Wenjie, Zonglai Mo, Nawawi Chouw, and Krishnan Jayaraman. 2021. "Renovation Effect of Flax FRP-Reinforced Cracked Concrete Slabs under Impact Loadings" Materials 14, no. 20: 6212. https://doi.org/10.3390/ma14206212