PROPERTIES OF SILICA-FUME CONCRETE. FINAL REPORT

Two major applications of silica-fume concrete within the Corps of Engineers were to repair abrasion-erosion damage in the stilling basin at Kinzua Dam and in the concrete lining of the low-flow channel, Los Angeles River. In each case, concrete cracking occurred during the repair. Apparently, this cracking has not significantly affected the performance of the concrete in resisting abrasion-erosion damage. However, such cracking could limit the use of silica-fume concrete in other repair and rehabilitation applications. This study was conducted to determine those properties of silica-fume concrete which might affect cracking and to develop guidance for minimizing cracking problems associated with the use of such concrete in future repair projects. Tests included compressive and tensile splitting strengths, modulus of elasticity, Poisson's ratio, ultimate strain capacity, uniaxial creep, shrinkage, coefficient of thermal expansion, adiabatic temperature rise, and abrasion erosion. None of the material properties of silica-fume concrete reported herein, with the possible exception of autogenous shrinkage, indicate that this material should be significantly more susceptible to cracking as a result of restrained contraction than conventional concrete. In fact, some material properties, particularly ultimate tensile strain capacity, would indicate that silica-fume concrete should have a reduced potential for cracking. Silica fume offers potential for improving many properties of concrete. The very high compressive strength and resulting increase in abrasion-erosion resistance are particularly beneficial in repair of hydraulic structures. These concretes should be considered in repair of abrasion-erosion susceptible locations, particularly in those areas where locally available aggregate might not otherwise be acceptable.

  • Corporate Authors:

    U.S. Army Waterways Experiment Station

    Structures Laboratory, 3909 Halls Ferry Road
    Vicksburg, MS  United States  39180-6199
  • Authors:
    • McDonald, J E
  • Publication Date: 1991-3

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 48 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00608475
  • Record Type: Publication
  • Report/Paper Numbers: Tech Rept REMR-CS-32
  • Files: TRIS
  • Created Date: May 31 1991 12:00AM