TENSILE PROPERTIES OF PORTLAND CEMENT CONCRETE WITH ALKALI RESISTANT GLASS FIBER REINFORCEMENT

Successful development in the U.S. and abroad of an alkali-resistant glass fiber has given impetus to the study of the material as a reinforcement for Portland cement paste, mortar, and concrete. This report qualitatively evaluates some of the factors affecting the engineering performance of fiberglass-reinforced Portland cement mortar and suggests the direction future studies might take. Laboratory tests were undertaken to evaluate the effects of varied mortar or matrix composition, physical orientation of the glass fibers due to forming or compacting of composite samples, and the effect of orientation relative to loading direction of individual fiberglass yarns within the matrix. The orientation of a given number of fibers in the matrix material was found to be of more significance in determining engineering performance than were small variations in matrix composition. It was indicated that mold configuration and compaction methods affected this orientation. The mechanics of individual fiberglass yarn failure are shown to be far more complex than those of steel fibers and thus not conducive to the same mathematical analysis. Yarns may fail in various pull-out and/or breaking modes which are controlled both by yarn orientation and matrix properties.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Stamm, J A
• Publication Date: 1974-2

Subject/Index Terms

• TRT Terms: Cement; Concrete curing; Fiber reinforced materials; Fiberglass; Portland cement
• Uncontrolled Terms: Fiber cement
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00057110
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Jul 31 1974 12:00AM