Optimization of textile reinforced composite rebars manufacturing process using response surface method

摘要

Steel rebar has been a major component for years in the field of construction. It has been serving its purpose effectively, but there are some issues associated with the use of steel rebar in construction like rebar corrosion and reduced bond strength. In this investigation, an attempt has been made to tackle these drawbacks. In this study, existing steel rebars have been converted into composite rebars using textile materials and synthetic resins. Steel rebars were wrapped with different textile materials like filament yams, fabrics, glass roving, etc. and then coated with synthetic resins/adhesives like epoxy, polyester and vinyl ester. The developed samples were then tested for important characteristics that have a major impact on their application in construction. These developed composite rebars show significant improvement in the tested properties when compared with the control sample i.e., 8 mm TMT rod. Obtained results were optimized to get maximum tensile strength, flexural strength, compressive strength, pullout strength and minimum corrosion rate. It has been found that composite rebars manufactured using nonwoven strip coated with 3% volume fraction of epoxy resin gives optimal results.