EFFECT OF CONDENSED SILICA FUME ON STEEL CORROSION IN CONCRETE

This paper reviews current experience on the presence of condensed silica fume (CSF) and its effect on electrolytic conditions in concrete, and hence, the ability of the concrete to protect embedded steel against corrosion. Even in the presence of large amounts of CSF, the passivity of embedded steel will not be destroyed. Decreased permeability will reduce the rate of carbonation. In a chloride-containing environment, resistance to chloride penetration will be substantially increased. Oxygen availability will not be affected greatly. However, even if passivity becomes broken, either by carbonation or by penetrating chlorides, the electrical resistivity may be so high that steel corrosion will not represent any practical problem. If correctly dispersed CSF is combined with a low water-cement ratio and proper curing, concrete structures with an excellent performance could be constructed even in the most aggressive and hostile environment.

Language

  • English

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Filing Info

  • Accession Number: 00716469
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 17 1996 12:00AM