Cracking Behavior of Steel Fiber Reinforced Concrete Revealed by Means of Acoustic Emission and Ultrasonic Wave Propagation

摘要

An experimental study on the cracking behavior of steel fiber rein- forced concrete(SFRC) is reported. Third-point bend tests were car- ried out on notched beams Test setup enabled recording of load, beam deflection, and crack mouth opening displacement. Simultaneously, acoustic waves caused by cracking were counted. At regular time intervals, ultrasonic compression waves were induced at one beam end and recorded at the other beam end after propagation through the sample.