Some developments in polypropylene fibers for concrete

Antoine E. Naaman, Surendra P. Shah, James L. Throne

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


The main purpose of this project was to explore the feasibility of using newly developed polypropylene (PP) fibers as reinforcement for portland cement concrete and to compare their reinforcing effectiveness with asbestos, glass and steel fibers. The PP fibers used were made of a high tensile strength (up to 80 ksi), high modulus (up to 106psi), high stretch ratio (up to 12 to 1) polypropylene ribbon yarn supplied by AMOCO Synthetic Fabrics. The fibers were cut from a continuous strand obtained by properly twisting two PP ribbon yarns together. Twisting led to a substantial increase in the bonding properties of the fibers (mechanical bond) and their rigidity considered important during mixing. Different fabrication procedures and mortar mixes are described. Salient results of an extensive series of tests on flexural beams and pull-out tests to improve bonding properties are reported. Because steel, glass, asbestos and polypropylene have substantially different specific gravities, performance comparison is made not only on the basis of volume fraction of fibers but also weight fraction and related costs. It stresses the potential merits of using PP or equivalent organic fibers in con-crete matrices and suggests exciting research directions to pursue.

Original languageEnglish (US)
Title of host publicationFiber Reinforced Concrete - International Symposium
EditorsGeorge C. Hoff
PublisherAmerican Concrete Institute
Number of pages22
ISBN (Electronic)9780870317118
StatePublished - Nov 1 1984
EventInternational Symposium on Fiber Reinforced Concrete at ACI 1984 Fall Convention - New York, United States
Duration: Oct 28 1984Nov 2 1984

Publication series

NameAmerican Concrete Institute, ACI Special Publication
ISSN (Print)0193-2527


ConferenceInternational Symposium on Fiber Reinforced Concrete at ACI 1984 Fall Convention
Country/TerritoryUnited States
CityNew York


  • Asbestos
  • Bonding
  • Costs
  • Cracking (fracturing)
  • Fiber reinforced concretes
  • Flexural strength
  • Glass fibers
  • Metal fibers
  • Plasticizers
  • Polypropylene fibers

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)


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