REDUCING CHLORIDE INGRESS TO CONCRETE BRIDGES BY IMPREGNANTS

This study evaluates the efffectiveness of silane treatments to reinforced concrete bridge piers for reducing the ingress of chloride ions from deicing salts. The ingress of chlorides has caused corrosion of the reinforcement and rapid deterioration of bridges. Two 1m wide strips on a pair of half piers on a motorway bridge were treated with trimethoxy isobutyl silane with adjacent untreated strips acting as controls in the experiment. Samples of concrete were extracted by hammer drilling from treated and untreated parts of the pier on six occasions during a ten year period following the treatment; one set of samples was taken before the concrete was treated with silane. The samples were analysed for total chloride content and the results expressed as chloride-depth profiles, chloride ingress and chloride content and the results expressed as chloride-depth profiles, chloride ingress and chloride flux. The results showed that chloride ingress was reduced by 65% in the silane treated concrete. The chloride-depth profiles indicated that the time to corrosion was substantially increased in the silane treated concrete. The silane treatment was still fully effective after 10 years service. (A) For the covering abstract see ITRD E106702.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727728199
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • VASSIE, P R
  • CALDER, A
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: p. 133-47
• Serial:
  • CONTROLLING CONCRETE DEGRADATION. PROCEEDINGS OF THE INTERNATIONAL SEMINAR HELD AT THE UNIVERSITY OF DUNDEE, SCOTLAND, UK ON 7 SEPTEMBER 1999
  • Publisher: Thomas Telford Limited

Subject/Index Terms

• TRT Terms: Bridge decks; Corrosion; Halides; Material reinforcement; Reinforced concrete; Reinforcing materials; Silicon; Waterproofing
• ITRD Terms: 3482: Bridge deck; 5252: Corrosion; 7314: Halide; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 7148: Silicon; 3375: Waterproofing
• Subject Areas: Bridges and other structures;

Filing Info

• Accession Number: 00801804
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-2819-9
• Files: ITRD
• Created Date: Nov 8 2000 12:00AM