Experimental Investigation into Mechanical Properties of Polypropylene Reactive Powder Concrete

This paper experimentally investigates the effects of embedded polypropylene fibers (PP fibers) on the mechanical properties— including compression strength, split tensile strength, flexural strength, fracture ductility, and fracture energy—of ultra-high strength reactive powder concrete (RPC). A large-scale laser profilometer was employed to obtain the three-dimensional (3-D) geometry of the fracture surfaces of the prism specimens after three-point bending tests. Scanning electron microscopy was used to characterize the microstructure of the fibered RPC. Experimental results indicate that the addition of PP fibers with a volume fraction ρv less than 0.3% had insignificant effects on the mechanical strengths of RPC. The addition of PP fibers with ρv ranging between 0.3 and 0.9% improved the mechanical strengths and the fracture performances. All the measured mechanical properties of the fibered RPC decreased to a certain extent, as ρv exceeded 0.9%. The reinforcement mechanisms of the PP fibers in RPC are analyzed and discussed.


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  • Accession Number: 01667321
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 25 2018 11:15AM