Fracture mechanical properties of high-performance concrete—Influence of silica fume

Abstract

High-performance concrete and high-quality ordinary concrete, with or without silica fume, were tested for mechanical and fracture mechanical properties. Testing was performed at 28 days and 2 years. Ten percent silica fume resulted in a 20 to 25% increase in the direct tensile strength and a 10 to 20% increase in flexural and compressive strength, but had little effect on the dynamic modulus of elasticity. The brittleness appeared to increase with the presence of silica fume. RI~SUMI~

A Survey of High Performance Concrete Developments in Civil Engineering Field

“…The concretes and the pastes with 10% silica fume appeared to reduce strength between 3 and 9 months and were higher at 2 years than after 3 months. The direct tensile strength, flexural strength, compressive strength, dynamic modulus of elasticity and fracture energy of High Performance Concrete mixes (W/B = 0.25 & 0.4) and silica fume (0%, 10%) at 28 days and 2 years were studied by K. O. Kjellsen et al [62]. An increase of 20% to 25% in direct tensile strength and 10% to 25% in flexural & compressive strength with little effect on the dynamic modulus of elasticity was found with 10% silica fume.…”