Production of geopolymer adhesive paste material for NSM technique

Near-surface mounted (NSM) is one of the most promising strengthening techniques of reinforcement concrete (RC) structures that have attracted the attention of researchers. Epoxy was bond material in this technique, epoxy had good adhesive material but the rapid failure of the mechanical properties of the matrix at high temperature, and the dangerous effects of toxic gases during the application, led to reduce the use of this technique in high temperature areas; therefore now we need to replace the epoxy by new material. This study presents production of new adhesive from geopolymer paste used for the first time in NSM as alternative of epoxy. Then, to obtain best amount of adhesive material, we studied different dimensions of groove in order to reach the optimum groove dimensions. An experimental single lap shear test (pull-out test) was using to study the bond characteristics. The test results showed at the optimum dimensions of groove that geopolymer paste has good efficiency as a bond adhesive material in NSM strengthening technique.