Study on the Influence of Polypropylene Fiber With Different Shapes on the Mechanical Properties of Concrete
In this paper,the effects of three different shapes and different dosage of polypropylene fiber on the mechanical properties of concrete were studied.Through compressive strength test,splitting tensile strength test and bending strength test of polypropylene fiber concrete,the compressive strength,tensile compression ratio and bending compression ratio of fiber reinforced concrete were analyzed.The test results show that the best effect on the mechanical properties of concrete is when the content of 0.60%～0.90%polypropylene fiber;the shape and dosage of polypropylene fiber have influence on the compressive strength of concrete.The monofila-ment polypropylene fiber has the worst effect,and the embossed polypropylene fiber with the dosage of 0.90%has the best effect on the compressive strength.The tensile compression ratio of concrete is mainly affected by the amount of polypropylene fiber,and the shape of polypropylene fiber is the main factor affecting the concrete folding compression ratio.
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