Title: Behavior of Steel Fiber-Reinforced Cementitious Mortar and High-Performance Concrete in Triaxial Loading

Author(s): Afshin Noori, Mohammad Shekarchi, Masoud Moradian, and Mahdi Moosavi

Publication: Materials Journal

Volume: 112

Issue: 1

Appears on pages(s): 95-104

Keywords: cementitious mortar; confining pressure; failure criterion; high-performance concrete; triaxial compression

DOI: 10.14359/51686837

Date: 1/1/2015

Abstract:
This paper presents a study on the behavior of a steel fiber-reinforced cementitious mortar (SFRCM) in a triaxial compression condition and a comparison of results with those of a common high-performance concrete (HPC). SFRCM with a high compressive strength seems to be a promising material in civil engineering applications. A series of cylindrical specimens of two types of SFRCM with 1% and 2% volume fraction of steel fiber and one type of HPC were prepared and tested under various confining pressures: 0, 5, 10, 15, and 20 MPa (0.72, 1.45, 2.18, and 2.90 ksi). In general, raising the confinement level increases the peak axial stress and the corresponding strain, while on the other hand this causes the specimens to behave more ductile. According to the results, the addition of steel fiber has meaningfully helped increase energy absorption capacity of the specimens. Finally, empirical equations were derived to predict the peak axial stress and the corresponding strain of the tested materials as a function of confining pressure for tested materials.