DEVELOPMENT AND IMPROVING OF ULTRA-HIGH-PERFORMANCE CONCRETE IN EGYPT

Civil Engineering

This paper introduces the development of Ultra-High-Performance Concrete (UHPC), which is one of the most advanced types of concrete. The entire method relied solely on locally available resources. All mixes were prepared without any specialized mixer, procedures, or treatments, like elevated pressure and others. The research aimed to develop the mechanical properties, and create cost-effective UHPC using local, and available resources with respect to sustainable building concepts that achieve accepted workability, compressive strength, tensile strength, and flexure strength. In addition to studying the impact of using corrugated steel fibers with varying steel fiber contents (0.4 %, 1 % ,2 %, and 4% by volume fraction), and investigating the (ductile-brittle) behavior of concrete. The results indicated that increasing the corrugated fibers [increasing the fiber volume] will reduce the workability of UHPC, and have an Unnoticeable improvement in compressive strength, however it has significant improvement in splitting tensile, and flexure strength. Ultra-high-performance concrete (UHPC) has much higher splitting tensile strength compared to normal-strength concrete, and high-strength concrete. Previous research on UHPC has mostly examined its direct tensile strength, with inadequate attention given to its splitting tensile strength. This study will give an experimental evaluation of UHPC's splitting tensile strength.

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