Ultimate strength of concrete confined by glass fiber reinforced polymer.

Abstract

This article focuses on the study of the compressive behavior on the cylindrical concrete by enhancing compressive strength of the concrete within glasses fiber reinforced polymer. The fiber reinforced polymer helps increase the strength, toughness and maintain strength of concrete effectively. With this issue, it is suitable for concrete reinforcement. The concrete sample mold used is a cylindrical shape with the size of 15x30 cm. From casting the sample blocks, low strength concrete with a compressive strength of 100 ksc was used, while normal strength concrete with a compressive strength of 200 ksc and 300 ksc was wrapped with glass fiber reinforced polymer on the surface of the sample blocks in rounds 2 rounds, 4 rounds and 6 rounds with 12 samples per group. The test results show the specimens with two rounds of confinement have S.F. values of 1.02-1.23, the specimens with four rounds of confinement have S.F. values of 1.06-1.37 and the specimens with 6 rounds of confinement have S.F. values of 1.29-1.44. For a design compressive strength of 100 ksc, 6 rounds of confinement with GFRP fiber reinforced polymer give very good results. As for a design compressive strength of 200-300 ksc, 4 rounds to 6 rounds or more are required. To see a clear result, 2 rounds of GFRP confinement may not be sufficient for the concrete which needed high compressive strength.