DEVELOPMENT OF ALKALI-SILICA REACTION IN REINFORCED CONCRETE SUBJECTED TO CATHODIC PROTECTION

Concrete specimens containing steel electrodes were made from a mix that contained a reactive aggregate but insufficient alkali concentration to cause expansion due to alkali-silica reaction (ASR). Cathodic protection was applied to the steel at various levels of potentiostatic or galvanostatic polarisation and the strains in the concrete were monitored over gauge lengths close to and remote from the steel. Expansions in the vicinity of the steel were found to be dependent on the level of applied polarisation and were associated with local development of ASR in a zone of enhanced alkalinity formed around the cathode. Practical implications with regard to cathodic protection of reinforced concrete are considered. (A) For the covering abstract see IRRD 871351.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 774-81

Subject/Index Terms

Filing Info

  • Accession Number: 00711149
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-946691-46-0
  • Files: ITRD
  • Created Date: Sep 20 1995 12:00AM