AN EXPERIMENTAL COMPARISON OF THE FILTRATION CHARACTERISTICS OF CONSTRUCTION FABRICS UNDER DYNAMIC LOADING

The article describes laboratory tests carried out to assess the filtration characteristics of various fabrics when placed between a granular sub-base and a cohesive soil. An apparatus similar to that used by Snaith and Bell was used to test Terram 1000, Fibretex f2-b, G100 and Lotrak 45/45, all of which, except Lotrak 45/45, were non-woven. A loading period of 24 h was used for four types of cohesive soil in the first series of tests. Type 1 soil only was used in the second series with separate loading periods ranging from 12 h to 96 h. Results show that repeated loading without a fabric resulted in considerable migration of the subgrade into the sub-base. Introducing a fabric reduces the movement of the subgrade particles, the degree of reduction depending upon the properties of the fabric. The presence of a sand layer beneath the fabric assists in the formation of a filter. There was some evidence that the period of repetitive loading is more significant in subgrade migration than the number of load repetitions. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00168505
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • SALTER, R J
• Publication Date: 1982-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 392-396
• Serial:
  • GEOTECHNIQUE
  • Volume: 32
  • Issue Number: 4
  • Publisher: Thomas Telford Limited
  • ISSN: 0016-8505

Subject/Index Terms

• TRT Terms: Accelerated tests; Cohesive soils; Dynamic loads; Filtration; Geotextiles; Granular materials; Migration; Motion; Nonwoven materials; Repeated loads; Sand; Subbase (Pavements); Subgrade (Pavements); Tests; Time; Woven materials
• Uncontrolled Terms: Decreases; Subbase
• ITRD Terms: 4157: Cohesive soil; 9009: Decrease; 7182: Filter; 4107: Granular; 5483: Movement; 4558: Nonwoven material; 5588: Repetitive loading; 2961: Roadbase; 4105: Sand; 2950: Subgrade; 6255: Test; 5414: Time; 4549: Woven material
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00372566
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 31 1983 12:00AM