SULPHATE INCREASE IN LABORATORY PREPARED SAMPLES

This Technical Note describes an experiment which began in February 1990, when a large number of acid soluble sulphate analyses of Lias Clay samples were undertaken to determine the possible significance of sulphate in causing ground heave. Sub-samples of approximately 100g were dried and powdered and representative 2g aliquots removed for analysis as recommended in BS 1377: 1975. The remaining powdered material was retained in glass bottles and stored at room temperature. In July 1990 a further analysis of the material was undertaken. In all but two of the twenty-eight powdered samples there was an increase in the acid soluble sulphate content. It is concluded that it is dangerous to use test results without due consideration of potential changes in ground conditions which may lead to a significant increase in sulphate content. (TRRL)

  • Availability:
  • Corporate Authors:

    GEOLOGICAL SOCIETY

    BURLINGTON HOUSE, PICCADILLY
    LONDON,   United Kingdom  W1V 0JU
  • Authors:
    • HAWKINS, A B
    • Wilson, SLS
  • Publication Date: 1990

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00617416
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1991 12:00AM