Shear Prediction of geopolymer concrete beams using Basalt / Glass FRP bars

Abstract

Fibre Reinforced Polymer (FRP) bars are effective alternatives to steel bars. This paper performs the shear evaluation of geopolymer concrete beams reinforced with Glass (G) / Basalt (B) FRP bars with Glass/ Basalt stirrups. Totally nine beams of GFRP/BFRP/Steel bars of size 100 × 160 × 1700 mm were cast in geopolymer/conventional concrete and tested by varying the ratio of shear span to an effective depth such as 3.6, 3.9, and 4.3 with a four-point static bending test. The deflection behaviour, moment-curvature, crack pattern, propagation spacing, and the number of cracks was studied. The results are compared with steel reinforced conventional concrete. The prediction equation of the shear strength equation is also proposed and compared with existing models.