Abstract
The need for a coherent system of materials for patch repair of damaged reinforced concrete to reduce the risk of further corrosion is emphasised. The behaviour of reinforcing bars in repaired prisms was studied. From this the importance was recognized of considering repair zone and surrounding concrete as an electrochemical combination when selecting a reinforcing bar primer. Formulated cementitious repair mortars were shown to have much lower oxygen, carbon dioxide and chloride ion diffusion coefficients and initial surface absorption properties than typical concrete. Additional protection to the repair zone and unrepaired concrete was given by surface treatments. Laboratory corrosion monitoring of treated concrete specimens showed that use of a surface penetrant/sealer system proved highly effective in preventing corrosion due to restriction of chloride ingress. The untreated control specimen showed severe corrosion over the same test period. A surface penetrant/coating system was shown to act as a significant barrier to carbon dioxide diffusion. These barrier properties were not significantly diminished after accelerated weathering. (A)
| Original language | English |
|---|---|
| Title of host publication | Unknown Host Publication Title |
| Publisher | London, U.K., Elsevier Applied Science |
| ISBN (Print) | 1851664874, 9781851664870 |
| State | Published - 1990 |
ASJC Scopus subject areas
- General Engineering