Correlation between the fiber content and orientation and the mechanical behaviour of fiber-reinforced concrete subjected to static and cyclic three point bending test by the use of CT-Scan technology

This paper analyzes how fiber content and orientation influence the behavior of steel fiber-reinforced concrete subjected to static and cyclic three point bending test, and more specifically, how evolves the residual tensile strength with the damage level. Sixty-five concrete prisms, belonging to two different series, labeled R-Series and M-Series, were tested. The concrete matrix was the same in both cases but R-Series showed a 1% by volume of fibers, while the M-Series showed a 2% of fibers. The results reveal how the fiber content and orientation influence the degradation of the residual tensile strength with the damage level.