The use of short pitch-based carbon fibers, together with a dispersant, chemical agents and silica fume in concrete with fine and coarse aggregates resulted in a flexual strength increase of 85%, and a flexural toughness increase of 205%, a compressive strength increase of 22%, and a material price increase of 39%. The slump was 4 in. at a water/cement ratio of 0/50. The air conent was 6%, so the freeze-thaw durability was increased, even in the absence of an air entrainer. The aggregate size had little effect on the above properties. The minimum carbon fiber content was 0.1 vol %. The optimum fiber length was such that the mean fiber length decreased from 12 mm before mixing to 7 mm after mixing, which used a Hobart mixer. The drying shrinkage was decreased by up to 90%. The electrical resistivity was decreased by up to 83%.

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 80 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00622531
  • Record Type: Publication
  • Report/Paper Numbers: SHRP-ID/UFR-92-605
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 30 1992 12:00AM