Effect Of Steel Fibers (30mm), Polypropylene Mighty-Mono Fibers, Basalt Fibers, Pva Fibers, Chemical Additives, And Polymer Latex on UHPC

Abstract

Reactive powder concrete, or Ultra-High-Performance Concrete (UHPC), is a contemporary cement material that initially appeared in France in the 1990s. Because of UHPC's exceptional strength and durability in the global construction market, extensive research has been conducted over the years to make it a sustainable building material. According to numerous studies, the ability of UHPC to flow, consolidate, behave after breaking, and retain strength and durability when hardened are all improved by the addition of fibers. These improvements in concrete properties have led to slender structural elements and reduced own weight of buildings, resulting in smaller lateral loads during earthquakes. The impact of polymeric latexes and fiber reinforcement micro-scale chemical additives on the fresh and hardened properties of UHPC materials needs further research investigation. The objective of this study was to evaluate the effects of chemical additives and commercial fibers on UHPC performance. It examined a typical UHPC mixture, referred to as the Control Mix, consisting of quartz sand, silica powder, Portland cement, and special admixtures. Other tested UHPC mixtures included different types of fibers, Iron oxide (Fe2O3), as well as polymeric latex Styrene-Butadiene Rubber (SBR) latex. The study had two primary objectives. First, the mechanical performance and flowability of UHPC in the presence of fibers and additives were assessed and measured. The second one is to propose UHPC mixes for repair applications and assess their behaviour through testing in accordance with relevant standards.