EFFECTIVENESS OF CORROSION INHIBITORS IN CONTAMINATED CONCRETE

Four types of corrosion inhibitors (calcium nitrite at two dosages, calcium nitrate at three dosages and two organic inhibitors at their recommended dosages) were evaluated at five different levels of contamination, i.e., 0.8% chloride; 0.8% chloride plus 1.5% SO(sub 3); seawater; brackish water; and unwashed aggregates. Concrete specimens were used to assess the effect of corrosion inhibitors on the compressive strength of concrete and reinforcement corrosion. The results indicated that the corrosion inhibitors investigated in this study did not adversely affect the compressive strength of concrete. Furthermore, calcium nitrite was efficient in delaying the initiation of reinforcement corrosion in the concrete specimens contaminated with chloride, while both calcium nitrite and calcium nitrate mitigated the corrosive effects of chloride plus sulfate salts or sea water. In the concrete specimens prepared with brackish water or unwashed aggregates, all the inhibitors were effective in reducing the rate of reinforcement corrosion. The type and dosage of corrosion inhibitor were observed to be dependent on the nature and level of contamination. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09589465
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Baghabra Al-Amoudi, O S
  • Maslehuddin, M
  • LASHARI, A N
  • ALMUSALLAM, A A
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Pagination: p. 439-49
• Serial:
  • Cement and Concrete Composites
  • Volume: 25
  • Issue Number: 4-5
  • Publisher: Elsevier
  • ISSN: 0958-9465

Subject/Index Terms

• TRT Terms: Concrete; Corrosion; Prevention
• ITRD Terms: 4755: Concrete; 5252: Corrosion; 9149: Prevention
• Subject Areas: Security and Emergencies;

Filing Info

• Accession Number: 00961293
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Aug 13 2003 12:00AM