@inproceedings{87bf3abcaa194abaaa24a189827362c7,
title = "Some developments in polypropylene fibers for concrete",
abstract = "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.",
keywords = "Asbestos, Bonding, Costs, Cracking (fracturing), Fiber reinforced concretes, Flexural strength, Glass fibers, Metal fibers, Plasticizers, Polypropylene fibers",
author = "Naaman, {Antoine E.} and Shah, {Surendra P.} and Throne, {James L.}",
note = "Funding Information: 111is study was supported by a grant from AMOCO Chemical Corporation, Synthetic Fabrics Division. Publisher Copyright: {\textcopyright} 1984 American Concrete Institute. All rights reserved.; International Symposium on Fiber Reinforced Concrete at ACI 1984 Fall Convention ; Conference date: 28-10-1984 Through 02-11-1984",
year = "1984",
month = nov,
day = "1",
language = "English (US)",
series = "American Concrete Institute, ACI Special Publication",
publisher = "American Concrete Institute",
pages = "375--396",
editor = "Hoff, {George C.}",
booktitle = "Fiber Reinforced Concrete - International Symposium",
}