| Title |
Effect of Fiber Types on the Fracture Process and Acoustic Emissions Characteristics in High Performance Fiber-Reinforced Cementitious Composites |
| Authors |
Yun Hyun-Do ; Kim Sun-Woo ; Jeon Esther |
| Keywords |
HPFRCC ; Reinforcing Fiber ; Acoustic Emission ; Fracture Process ; Source Location |
| Abstract |
Fiber is an important ingredient in high performance fiber-reinforced cementitious composite (HPFRCC), which can control fracture of cementitious composite by bridging action. The properties of reinforcing fiber, as tensile strength, aspect ratio and elastic modulus, have great effect on the fracture behavior of HPFRCC. Acoustic emission(AE) method was used to evaluate the characteristics of fracture process and the micro-failure mechanism of HPFRCC. This investigation of distress attempts to relate external behavior to internal signals of distress through acoustic emission. This helps to identify critical internal distress vis-a-vis external level of stress. For these purposes, three kinds of fibers were used : PP(Polypropylene), PE(Polyethylene), SC(Steel cord). In this study, the AE characteristics of HPFRCC with different fiber type(PE.15, PP2.0, SC0.75+PE0.75) distributions under four-point-bending were studied. The result show that the AE technique is a valuable tool to study the failure mechanism of HPFRCC. Moreover, there is a good relationship between AE hits and fracture energy. |