Statistical mixture design approach for eco-efficient UHPC

This study presents an innovative analytical method based on statistical mixture design (SMD) approach for eco-efficient ultra-high performance concrete (UHPC) mixtures. This was developed to assess the influence of each parameter as well as the interaction between these on the response variables and thus allowing mixture design. The lack-of-fit test results and the high value of coefficients of multiple determinations showed the adequacy of this analytical method to predict the required performance of eco-efficient UHPC. Furthermore, it was concluded that the incorporation of quartz flour is effective to improve both compressive strength and flowability. Lastly, the numerical optimization indicated that designing an UHPC mixture with a compressive strength exceeding 150 MPa but with low cement content is possible, even without applying heat curing.