Polypropylene Fiber Reinforced Concrete for Airport Rigid Pavements: Compressive and Flexural Strength
This paper presents the experimental investigation carried out to study the behavior of polypropylene fiber reinforced concrete (PPFRC) under compression and flexure. Crimped polypropylene fibers and twisted polypropylene fiber were used with 0.0%, 0.2%, 0.4% and 0.6% volume fractions. The influence of the volume fraction of each shape of polypropylene fiber on the compressive strength and flexural strength is presented. Empirical equations to predict the effect of polypropylene fiber on compressive and flexural strength of concrete were proposed using linear regression analysis. An increase of 27% in flexural strength was obtained when 0.6% volume fraction of twisted polypropylene fiber was added. It was also found that the contribution of fiber in flexural strength is more effective when twisted fibers were used. The compressive strength was found to be less affected by polypropylene fiber addition.
Helen Zhang, Gang Shen and David Jin
T. Merhej et al., "Polypropylene Fiber Reinforced Concrete for Airport Rigid Pavements: Compressive and Flexural Strength", Advanced Materials Research, Vols. 219-220, pp. 1601-1607, 2011