Optimising GGBS-based ultra high-performance geopolymer mortar: an orthogonal array approach

The research focuses on optimising the mix design of ultra high-performance geopolymer mortar by employing the Taguchi method’s orthogonal array parameters through a systematic experimental approach. Utilising an L9 orthogonal array, the investigation was structured into two phases, each examining a distinct set of variables across three levels to ascertain their impact on compressive strength. The optimal mix was characterised by a water to binder ratio of 0.28, a fibre volume of 3%, a silicon carbide to binder ratio of 0, and a superplasticizer to binder ratio of 2%. This mix achieved 126 MPa of compressive strength.