BOND PERFORMANCE OF BASALT FIBER REINFORCED POLYMER BARS AGAINST AGGRESSIVE ENVIRONMENT IN CONCRETE

Abstract

Concrete has been utilized in building for many decades because of the need for reinforcements because of its fragile nature. Bamboo, wire mesh, and structural steel have all been used to reinforce concrete during the last few decades. Regarding commercial and subterranean applications of concrete-reinforced steel (CRS), corrosion is more likely to occur. Rusted steel used in concrete rehabilitation is time- consuming and expensive. GFRP, CFRP, and AFRP bars are just a few of the many choices that researchers have advised thus far. Apart from the superior strength-to- weight ratio and low corrosion susceptibility, these bars surpassed rebars in every other regard. However, further research needs to be done to properly understand how the BFRP bars respond to a variety of concrete mixtures. Basalt fiber reinforced polymer bars (BFRP) is produced by mixing thin basalt fibers with resin to make a polymeric matrix using the pultrusion method. Several variables, including the kind of concrete, bar size, embedment length, and a variety of harsh environments, are being altered to examine the bonding performance of BFRP bars. The pull-out performance of three distinct bar diameters (12.7, 15.9, and 19mm) was investigated by adjusting three different embedment lengths (5db, 10db, and 15db) in various concretes, including normal strength, high strength, and geopolymer concrete. A seawater environment and an alkaline environment were used to evaluate each scenario. Bond strengths of 22.5, 20.99, and 15.32 MPa were observed in high strength, normal strength, and geopolymer concrete, respectively, tested in an environment that was under controlled conditions. High strength, normal strength, and geopolymer concrete retained 82 percent, 79 percent, and 76 percent of their bond strength, respectively, in an alkaline environment. When exposed to seawater, high strength, normal strength, and geopolymer concrete

showed bond strength retention of 80%, 76%, and 79%, respectively. The bond strength of the BFRP bar was predicted using the Fib bulletin method for 50 years