Physico-mechanical and microstructural characterization of concretes ultra-high performance matrix fiber

Abstract

This work will be devoted on the one hand to the formulation of an ultra-high performance fiber concrete based on local materials (cement and fine sand) and on the other hand to the study of the effect of the fibers on the physico-mechanical behavior of the concrete. The formulation will be obtained by the search for the optimum percentage of the fibers and by adopting as criterion the workability of the concrete. For the optimal fiber retention, the influence of the fibers on the mechanical behavior of the concrete (compression strength, tensile strength and ductility) will be studied. The results of this study will highlight the impact of the microstructure on the improvement of the physico-mechanical characteristics of concrete.

Keywords:

• UHPFC
• concrete
• fibers
• addition
• sand and microstructure