Behavior of cementitious composites with randomly dispersed microfibers

D. A. Lange*, C. Ouyang, S. P. Shah

*Corresponding author for this work

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

Abstract

Short carbon and steel fibers were used to reinforce high performance cement-based mortars. Effects of volume fraction, length and type of fiber as well as type of cement-based matrix were experimentally examined using uniaxial tensile specimens and three-point bend beams. The fracture properties were measured by a RILEM recommended test procedure. By incorporating the obtained matrix fracture properties, fiber aspect ratio and fiber-matrix interface bond into a fracture mechanical R-curve approach, mechanical responses of cement-based matrices reinforced by fibers can be predicted. Confocal microscopy was used to measure fracture surface roughness of the microfiber reinforced specimens. The roughness of specimens increased with increasing fiber volume fraction. Roughness was found to have a positive correlation with mechanical properties such as peak load in tension and flexure, KIC and critical crack length.

Original languageEnglish (US)
Title of host publicationMaterials for the New Millennium
EditorsKen P. Chong
PublisherASCE
Pages281-287
Number of pages7
Volume1
StatePublished - Dec 1 1996
EventProceedings of the 1996 4th Materials Engineering Conference. Part 1 (of 2) - Washington, DC, USA
Duration: Nov 10 1996Nov 14 1996

Other

OtherProceedings of the 1996 4th Materials Engineering Conference. Part 1 (of 2)
CityWashington, DC, USA
Period11/10/9611/14/96

ASJC Scopus subject areas

  • Building and Construction

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