Mechanical Response of Cementitious Composites Containing Alkali-Resistant Glass Fiber Reinforcement

Abstract

Concrete is one of the most widely utilized construction materials because of its excellent compressive strength and long-term durability. Despite these advantages, it exhibits poor tensile strength and is prone to cracking, which can reduce its overall structural performance. To address these shortcomings, the inclusion of fibers in concrete has gained significant attention as an effective reinforcement technique. In this study, the effect of Alkali-Resistant (AR) glass fibers on the strength properties of concrete is examined.Concrete mixes were prepared using Ordinary Portland Cement with varying percentages of AR glass fibers based on the weight of cement. Standard test specimens were prepared and evaluated to measure compressive strength, split tensile strength, and flexural strength at various curing periods. The findings indicate that incorporating alkali-resistant glass fibers significantly enhances the mechanical performance of concrete. An increase in fiber dosage results in improved compressive, tensile, and flexural strengths up to an optimal limit, beyond which the benefits may not be as pronounced. The inclusion of fibers also contributes to better crack control by minimizing the formation and growth of microcracks within the matrix. Furthermore, alkali-resistant glass fibers improve the durability of concrete and its ability to withstand harsh environmental exposure.Based on these observations, glass fiber reinforced concrete can be regarded as an effective material for improving structural efficiency and increasing the longevity of concrete structures, particularly in demanding environments such as marine and hydraulic applications.