ASSESSMENT OF SULFATE-BEARING GROUND FOR SOIL STABILISATION FOR BUILT DEVELOPMENT

The addition of lime and cement to clay soils to improve their engineering characteristics is a well-established method, but in some cases the stabilised layer fails to meet specifications due to sulphate attack resulting in ground heave and softening. Sulphates in the ground react with the lime or cement to form the expansive sulphate hydrates ettringite and thaumasite. Both these hydrates were formed during the construction of the Banbury section of the M40 motorway. Guidance on the assessment of sulphates and sulphides in materials stabilised for use in highway construction is given in Highways Agency publication HA 74/00 and new European standards (BS EN 13286 Parts 1 to 53). Details are given of tests for total sulphate, total sulphur, sulphate in 2:1 water/soil extract, sulphate in total groundwater, and swelling tests. A strategy for clay site and material appraisal is presented.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00174653
• Corporate Authors:

  EMAP CONSTRUCT LIMITED

  151 ROSEBERY AVENUE
  LONDON,   United Kingdom  EC1R 4QX
• Authors:
  • LONGWORTH, I
• Publication Date: 2004-5

Language

• English

Media Info

• Features: References;
• Pagination: p. 30-1, 33
• Serial:
  • GROUND ENGINEERING
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0017-4653

Subject/Index Terms

• TRT Terms: Calcium oxide; Cement; Clay; Freeways; Hydration; Soil mechanics; Soil stabilization; Standards; Sulfates; Sulfur; Swelling soils; Test procedures
• Uncontrolled Terms: Guidance
• Geographic Terms: United Kingdom
• ITRD Terms: 4758: Cement; 4177: Clay; 9104: Guidance; 7195: Hydration; 4574: Lime; 2752: Motorway; 5755: Soil mechanics; 3689: Soil stabilization; 187: Specification (standard); 7310: Sulphate; 7109: Sulphur; 5203: Swelling (soil); 6288: Test method; 8119: United Kingdom
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00976957
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Aug 4 2004 12:00AM