26. Non metallic (MCP) fiber reinforced concrete: mechanical characterization and slabs on grade design aspects

Title: 26. Non metallic (MCP) fiber reinforced concrete: mechanical characterization and slabs on grade design aspects
Author(s): F. Focacci, G. Mantegazza
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 339 - 348
Total Pages: 10
Nb references: 8
Language: English

Abstract: Fiber Reinforced Concrete (FRC) is widely used for elements of secondary structural importance (slabs on grade, tunnels, railway superstructures). Steel fibers are the most commonly adopted. However, at high fibers volume ratios, some difficulties could be found in obtaining a good homogeneity of the steel fibers in the concrete matrix with consequent non-homogeneity of the material characteristics. This paper deals with experimental evaluation of flexural performances of non metallic (Modified Copolymer of Polypropylene, MCP) Fiber Reinforced Concrete (MPFRC) and related design aspects for slabs on grade. The experimental program involves splitting tests of cylindrical specimens, compression tests and four point bending tests on notched and un-notched specimens. MPFRC results of four points bending tests were compared with results of hooked Steel Fiber Reinforced Concrete (SFRC) with the same volume ratio. MPFRC specimens showed more consistent results, thus confirming the more homogeneous distribution of fibers in concrete. Different concrete strengths and fiber volume ratios were investigated. Based on the experimental results, the constitutive law of the fiber reinforced concrete is determined. The constitutive law allows slabs on grade design considerations referring to the Ultimate Limit State and Serviceability Limit State.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00