Experimental investigation into mechanical properties of polypropylene reactive powder concrete

Yang Ju, Li Wang, Hongbin Liu, Guowei Ma

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)21-32
Number of pages12
JournalACI Materials Journal
Volume115
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

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