ALKALI SILICA REACTION IN ROADS. PART 2

The first part of a survey of the incidence of alkali-silica reaction in concrete roads was reported in Highways, Vol. 56, No. 1936, 1988, pp 19-24; the present paper reports the second part of the project and brings it to a conclusion. A further nineteen samples of road concrete were studied by petrographical examination of resin-impregnated thin sections; the number of samples showing evidence of the reaction rose to five out of a total of thirty-three samples examined in the whole survey. The reactive aggregates in four of the samples were flint gravels, in the fifth it was siltstone. The survey shows that while alkali-silica reaction is not a major problem in existing concrete roads, it can occur when a road becomes badly cracked and water thereby gains access to a potentially reactive aggregate in the concrete. Examination of the thin sections revealed other aspects of the condition of the concrete and these also are discussed in the paper. Advice is given on ways of reducing the possibility of alkali-silica reaction occurring in existing and new concrete roads, and on identifying the reaction if it is suspected to be present.

  • Availability:
  • Corporate Authors:

    Faversham House Group

    Faversham House, 111 St James Road
    Croydon, Surrey CR9 2TH,   England 
  • Authors:
    • WEST, G
    • Sibbick, R
  • Publication Date: 1989-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 9
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00485552
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jul 31 1989 12:00AM