A FIELD TEST FOR EVALUATING HIGH PERFORMANCE CONCRETE COVERCRETE QUALITY

Since in most deterioration mechanisms fluid ingress plays an important role, the surface skin of concrete provides the initial resistance to such factors as de-icer salt penetration, freeze-th resistance, and sulphate attack. Surface durability testing must evaluate resistance to the predominant mechanism of initial fluid ingress: capillary absorption or sorptivity. The primary focus of this study was to develop a test device suitable for nondestructi field use to evaluate the durability of covercrete by determining rate of absorption of concrete, including high performance concre This type of testing device must be simple to use, easily handled the field, portable, and inexpensive. This particular device allo for ease of operation and accommodates a wide range of surface applications such as vertical, horizontal, or sloped surfaces, an smooth or rough finishes, while providing quick, consistent, and meaningful results. The development of this apparatus was based o principles presented in the British Initial Surface Absorption Te BS 1881, Part 5: 1970, since it focuses on water absorption Test this nature, however, are very sensitive to the in situ moisture content of the surface concrete, as it will drastically alter the rate of absorption, In this paper, the field rate of absorption equipment is described and both calibration and field data are presented. (A)

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  • Corporate Authors:

    National Research Council of Canada

    1200 Montreal Road
    Ottawa, Ontario  Canada  K1A 0R6
  • Authors:
    • DESOUZA, S J
    • Hooton, R D
    • BICKLEY, J A
  • Publication Date: 1998-6

Language

  • English

Media Info

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Filing Info

  • Accession Number: 00766726
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD,
  • Created Date: Aug 2 2001 12:00AM