Experimental study on splitting tensile strength and acoustic emission characterisitcs of polypropylene fiber concrete

The polypropylene fiber concrete with different fiber content and whether or not adding into water reducer under splitting tensile was studied. The results show that the splitting tensile strength increases after adding polypropylene fiber, and the splitting tensile strength increases with the increasing of fiber content, the enhancement ratio of splitting tensile strength can reach 13% when the fiber content is 1.8Kg/m³ and water reducer has an significantly enhanced effect on the splitting tensile strength. The acoustic emission(AE) characteristics of polypropylene fiber concrete in splitting tensile test were researched, and the results indicate that the AE ringing accumulative number when specimens damage increases with the increasing of fiber and enhances significantly after adding water reducer, and the AE ringing accumulative number is linear essentially with fiber content and roughly with splitting tensile strength.