HIGH-STRENGTH CONCRETE AND FIBER-REINFORCED CEMENT COMPOSITES FOR POTENTIAL APPLICATION IN PROTECTIVE STRUCTURES

Abstract

This study investigates the static and dynamic behaviors of high performance concretes for protective structures, and has three main parts. In the first part, attempts were made to obtain a better understanding of the critical parameters governing the compressive strength of high-strength concrete (HSC). Numerical parametric study based on an idealized composite model and experiments on HSCs for verification were conducted. In the second part, behavior of the two strain-hardening cement composites (SHCCs) and two fiber-reinforced high-strength concretes (FRHSCs) under high strain rate compressive loadings was investigated. Intermediate and high strain rates were generated by the hydraulic compression machine and split Hopkinson pressure bar system, respectively. In the third part, behavior of the SHCCs, FRHSCs, and fiber-reinforced high-strength mortar under high velocity projectile impact was experimentally investigated. Effects of the compressive strength, hardness, elastic modulus, coarse aggregate, and fibers on the localized damage of these composites were examined.