INFLUENCE OF CARBONATION AND CHLORIDES ON CONCRETE DURABILITY

Although the damaging effect of carbonation on the durability of concrete is well known, it was only in 1982 that the physico-chemical effects were referred to in a British standard on the structural use of concrete, which covered the effects of carbonation and chlorides. The results of carbonation of concrete are shrinkage and the neutralization of the alkaline conditons of the hydrated cement paste. Under normal conditions the carbonation rate of concrete is low and is indicated by a table showing carbonation time for various depths of cover and w/c ratios. If concrete is carbonated to the full depth of cover then reinforcing steel is no longer protected by an alkaline environment and so rusting can occur. If chloride ion concentration is low and carbonation does not extend to the reinforcement then the use of a protective surface coating to stop further carbonation can be considered. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 

  Plenum Publishing Corporation

  233 Spring Street
  New York, NY  United States  10013
• Authors:
  • BECKETT, D
• Publication Date: 1983-2

Media Info

• Features: Photos; References; Tables;
• Pagination: p. 16-18
• Serial:
  • CONCRETE
  • Volume: 17
  • Issue Number: 2
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Alkali; Carbonation; Cement paste; Chlorides; Concrete; Corrosion; Deterioration; Durability; Hydrates; Loss and damage; Material reinforcement; Reinforcing materials; Reinforcing steel; Shrinkage
• Old TRIS Terms: Alkalies; Concrete shrinkage; Neutralizing
• ITRD Terms: 7312: Carbonate; 4755: Concrete; 5252: Corrosion; 1614: Damage; 5255: Deterioration; 5910: Durability; 7314: Halide; 3471: Reinforcement (in mater); 4743: Shrinkage
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00376798
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Oct 30 1983 12:00AM