International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 03 | Mar 2025
p-ISSN: 2395-0072
www.irjet.net
Experimental study on FRP bonded concrete reinforcement system exposed to sulphate environment. Dr B V Mathew1, Kripa K M2, Amrithesh P3, Nimmi R4, Safna Nasrin I5, Sunil S6 1 Professor, HOD, Dept. of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, INDIA
2 Assistant professor, Dept. of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, India 3 UG Scholar, Dept of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, INDIA 4UG Scholar, Dept of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, INDIA
5 UG Scholar, Dept of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, INDIA 6 UG Scholar, Dept of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, INDIA
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Abstract - In this study, we are experimenting with
Despite their efficiency, the long-term performance of FRPbonded concrete reinforcement systems, particularly in environments rich in sulphate, continues to be a major concern. The main aim of this experimental research is to thoroughly examine the impact of sulphate exposure on the bonding behavior and durability of FRP-bonded concrete reinforcement systems. In particular, the research will emphasize evaluating the effects of factors such as sulphate concentration, duration of exposure, and the inherent material properties of FRP on the bond strength between FRP and concrete, along with the deterioration of the FRP-concrete interface over time. This research seeks to deliver important insights into the longterm effectiveness of FRP reinforcement systems in environments exposed to sulphates through thorough experimentation and analysis. The outcomes of this investigation will play a crucial role in creating more efficient, long-lasting, and sustainable FRP-bonded concrete reinforcement systems. In the end, these improvements will increase the durability and lifespan of infrastructure facing harsh environmental conditions, promoting greater sustainability and minimizing the necessity for expensive repairs or replacements.
investigating the flexural strength of concrete beams bonded with Glass Fiber Reinforced Polymer (GFRP) sheets and subjected to sulphate environments. The concrete beams are cast and bonded with GFRP sheets before being immersed in a sulphate solution for a prolonged duration. The research included conducting flexural strength tests to evaluate how sulphate exposure affects the GFRP-concrete interface. The findings were compared with those from conventional concrete beams that are not reinforced with FRP and treated in both normal and sulphate environments. This analysis intends to assess how effectively FRP reinforcement can alleviate the negative impacts of sulphate exposure on concrete structures. The results offer important information regarding the durability and structural strength of FRP- FRP-reinforced concrete systems in harsh environments, supplying essential data for the design and upkeep of infrastructure exposed to conditions rich in sulphates. Key Words: Fiber-reinforced polymer (FRP) Epoxy resin Concrete Durability Sulphate environment
1.1 Need for FRP
1. INTRODUCTION
Concrete structures in sulphate-bearing conditions are exposed to degradation concerns, such as cracking and reduction in strength. Conventional steel reinforcement rusts,
Reinforced concrete (RC) structures are widely used in the construction sector because of their natural strength, longevity, and affordability. Nonetheless, when subjected to harsh environments, such as those containing sulphates, RC structures can face premature deterioration. The reaction between sulphates and the concrete matrix can initiate chemical processes that weaken the material's structure, leading to a notable decrease in service life and structural efficiency. To address this issue, Fiber-Reinforced Polymer (FRP) composites have surfaced as an effective option for strengthening and rehabilitating deteriorating RC structures. FRP-bonded concrete reinforcement systems have shown significant promise in improving the structural performance of these constructions, especially in lessening the impact of environmental damage.
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providing added decline. In this research, Glass Fiber Reinforced Polymer (GFRP) is investigated as a substitute reinforcing material because of its corrosion resistance, light weight, high tensile strength, and low thermal/electrical conductivity. GFRP possesses several advantages: - High corrosion resistance, increased lifespan - Less heavy than steel, simplified handling/installation - High tensile strength, cracking/tensile force-resistant - Low maintenance, long service life - Flexibility in application, including insulation
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