AN ENDURING PROBLEM

This paper discusses why concrete durability is still a major problem, despite extensive research during the last five decades. In the author's view, current codes are not robust enough to meet clients' expectations for some of the most severe exposure conditions. Comprehensive studies of the substantial publicly available data, increasing understanding of corrosion mechanisms, and the ability to model these mechanisms to a first-order approximation, lead to the conclusion that the current minimum allowable requirements for extreme exposure to chlorides will not achieve long-life structures with an acceptably low risk of deterioration, even when they are properly detailed and constructed. To obtain valuable information on performance of a structure, its exposure conditions need to be properly quantified, but the codes do not even attempt to quantify the exposure environment. It would be much better to define performance requirements and develop test methods to measure them. Sufficient allowance also needs to be taken of the variability of concrete and how it is increased by the construction process. Four guidelines are recommended to improve the long-term performance of concrete structures, and methods are also listed for improving the resistance of concrete cover and of steel reinforcement.

  • Availability:
  • Corporate Authors:

    Palladian Publications Limited

    15 South Street
    Farnham Surrey GU97QU,   United Kingdom 
  • Authors:
    • BAMFORTH, P
  • Publication Date: 1999

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00788404
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM