Cement-based cross-ply and sandwich laminate composites

A. Pivacek, G. J. Haupt, R. Vodela, B. Mobasher

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

Abstract

A class of new structural materials with a significant degree of ductility and strength are introduced that are durable, strong, and cost effective. High fiber content cementitious materials (FRC materials) are manufactured using a computer control led closed loop system for pultrusion and filament winding. Composites consisting of unidirectional lamina, and [0/90/0] are manufactured. In addition, sandwich composites with a lightweight aggregate core and 0/90 lamina as the skin elements are studied. Mechanical response of laminates is measured using closed loop uniaxial tensile and flexural tests. Results indicate that tensile strength of composites containing 5% alkali-resistant (AR) glass libers can exceed 40 MPa. The ultimate strain capacity can also be increased to more than 2% using cross plies at various orientations. Significant cost savings and weight reduction may be achieved by replacing the inner layers of the boards with a lightweight aggregate mixture at a marginal loss of strength. The ultimate strain capacity of the composites is a function of ply orientation, thickness, and stacking sequence. Various mechanisms of delamination. debonding. and crack deflection are identified, resulting in an ultimate strain capacity of 2%. and a fracture toughness as much as two orders of magnitude higher than the contcntional FRC materials. The extent of matrix cracking, ply delamination. and crack deflection mechanisms are studied by means of fluorescent microscopy.

Original languageEnglish (US)
Title of host publicationHigh-Performance Fiber-Reinforced Concrete Thin Sheet Products
EditorsAlva Peled, Surendra P. Shah, Nemkumar Banthia
PublisherAmerican Concrete Institute
Pages55-75
Number of pages21
ISBN (Electronic)9780870316890
StatePublished - Apr 1 2000
Externally publishedYes
EventHigh-Performance Fiber-Reinforced Concrete Thin Sheet Products 1999 - Chicago, United States
Duration: Mar 14 1999Mar 19 1999

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-190
ISSN (Print)0193-2527

Conference

ConferenceHigh-Performance Fiber-Reinforced Concrete Thin Sheet Products 1999
Country/TerritoryUnited States
CityChicago
Period3/14/993/19/99

Keywords

  • Composites
  • Fiber-reinforced concrete
  • Filament winding
  • High-performance concrete
  • Laminates
  • Pultrusion
  • Sandwich laminates
  • Strength glass fibers

ASJC Scopus subject areas

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

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