A comparative study of shear strength of monolithic geopolymer concrete interface

Geopolymer concrete is the composite and has prospective potential to become one of the alternatives to conventional concrete. This paper presents an experimental investigation on the shear strength of monolithic geopolymer concrete interface. A total of 18 push-off specimens with and without reinforcement across the interface were cast and tested. The experimental shear strength of geopolymer concrete is compared with the shear strength evaluated, using the available analytical models for normal concrete. The test results indicated that the shear strength of monolithic geopolymer concrete interface has increased up to certain compression strength of geopolymer concrete. Most of the available analytical models are conservative in estimating the shear strength of geopolymer concrete.