ON-LINE MEASUREMENT OF SIMULATED REINFORCEMENT CORROSION IN CONCRETE UNDER ACTION OF DE-ICERS. CORROSION OF REINFORCEMENT IN CONCRETE. PAPERS PRESENTED AT THE THIRD INTERNATIONAL SYMPOSIUM ON "CORROSION OF REINFORCEMENT IN CONCRETE CONSTRUCTION", BELFRY HOTEL, WISHAW, WARWICKSHIRE, MAY 21-24, 1990

The primary cause of long term damage to steel reinforced concrete bridges and elevated highways in the UK is use of rock salt as a road de-icer. Alternatives based on acetate salts are now available. This paper describes adaptation of a novel technique, the Cormon Environmental Corrosion Monitor (ECM), for studying the corrosion rates of steel in concrete when treated with de-icing chemicals. ECMs have been used to provide a continuous reading of the mechanical expansion associated with the corrosion of steel embedded in concrete paste. The expansion is a consequence of the increased volume resulting from the formation of corrosion product. This generates internal stresses in the structure which enhance fracture and accelerate failure of steel reinforced concrete. In this respect, the use of ECMs provide a small scale, rapid and realistic simulation of rebar corrosion in concrete. The results show that changing from rock salt to an acetate de-icer decreases the corrosion rate of steel embedded in concrete by more than a factor of ten. Use of acetates from the outset shows no sign of corrosion damage. Possible mechanisms by which the acetate de-icers achieve this are discussed.(A) For the covering abstract of the conference see IRRD 831449.

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  • Corporate Authors:

    Elsevier Science Publishers

    Crown House, Linton Road
    Barking, Essex IG11 8JU,   England 
  • Authors:
    • Man, MCM
    • Hazell, L B
    • SMITH, R P
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00606826
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 1-85166-487-4
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM