Compressive Strength of GUHPFRC Incorporating Fly Ash and Steel Fibers with Dissimilar Configuration

Abstract

Nowadays, producing eco-friendly concretes by reducing the usage of high volumes of Portland cement is a global aim. Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) involve using high volumes of Portland cement, which leads to high heat of hydration as well as high carbon emissions that enhance global warming. Therefore, researchers worldwide are interested in producing and assessing Green Ultra-High Performance Fiber Reinforced Concrete (GUHPFRC) which is the main focus of this paper. In this study, thirteen mixtures of such concretes are prepared to study the effect of using Fly Ash (FA) class F, as a Portland cement substitute by volume. The Fly Ash ratios of 15%, 30% and 45% are used to study the effect on the compressive strength of UHPFRC. The paper also focuses on incorporating both corrugated and end hook steel Fibers in the mixes with ratios (1%, 2%, 3% and 4%) to compensate for the decrease in compressive strength of concrete due to the replacement of cement by FA. The results showed that the substitution of 45% of the Portland cement with FA along with the incorporation of steel Fibers in the UHPFRC can be effective without any compressive strength loss.