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Concrete Specimens Confined by FRP in Marine, Hot and Humid Environments

Khaseh, Maryam | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 58626 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Tofiqh, Vahab
  7. Abstract:
  8. Effect of marine environment on FRP reinforced concrete studies in this research. For this purpose, concrete with different water and cement ratios is prepared and reinforced with FRP. In addition, it is used different types of fibers such as glass and carbon. The present research includes a laboratory study on three concrete specimens enclosed with concrete, glass and uncoated specimens with 4 repetitions in different environments such as sea, humid and hot environments for one month, three months, six months and nine months. To investigate the effect of concrete strength on confined specimens, three different mixing designs with carbon, glass and uncoated coatings were used to make specimens. After installing the devices to measure loading and axial displacements, the specimens were subjected to axial compressive loading and their strain and compressive strength were examined and tested. The software used to analyze the obtained data was MATLAB version b and SPSS version 23. The results of the covariance test showed that the interaction between the type of concrete (carbon, glass and normal) at different times and also the interaction between the type of concrete (carbon, glass and normal) and the location of the concrete (sea, island and coast) had a significant effect on the compressive strength of concrete with 99% confidence. Glass concrete had a higher compressive strength than carbon concrete, and also in glass concrete, the compressive strength increased with increasing time, but in the concrete sample, the compressive strength increased in months three and six and decreased in month nine. There was no difference in compressive strength for the uncoated concrete sample at different times and locations. Also, carbon and glass concrete samples showed higher compressive strength in the marine environment, and the compressive strength of carbon and glass concrete samples in the island environment was second priority, and in the coastal environment, the compressive strength of carbon and glass concrete samples was last priority. Other results also showed that uncoated concrete samples will show higher strain to stress compared to both concrete and glass samples. In uncoated samples, the strain was higher first on the island and then on the coast compared to different stresses. Regarding carbon and glass samples, they had almost similar behavior towards stress and strain. In both glass and concrete samples, strain was higher than stress in the coastal environment
  9. Keywords:
  10. Marine Environment ; Stress ; Strain ; Compressive Stress-Strain Behavior ; Compression Strength ; Fiber Reinforced Polymer (FRP) ; Concrete Specimen

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