DEVELOPMENT OF AN ACCELERATED CREEP TESTING PROCEDURE FOR GEOSYNTHETICS-PART I: TESTING

The main design concern for the long-term stability of geosynthetics-reinforced soil structures is the prediction of the creep behavior of the geosynthetics under the design loads. The long-term strength prediction is usually based on 10,000-h extension creep tests. Conducting creep tests at elevated temperatures can accelerate testing duration to a reasonable time frame, for example 1,000 h, and the results can be extrapolated to longer time intervals. The paper presents the current state of practice in creep testing of geosynthetics and the development of testing equipment and procedures for accelerated creep tests at elevated temperatures. Creep tests were performed on high density polyethylene (HDPE) and polyester (PET) geogrids (geotextiles) typically used in soil reinforcement applications. Creep behavior was first evaluated in 10,000 h tests, conducted at room temperature, at various creep loading levels (from 10 to 45% of ultimate strength of the geogrid T sub max). Accelerated creep test were then conducted for 1000 h at various controlled temperatures ranging from 24 degrees C (75 degrees F) to 72 degrees C (160 degrees F). These tests were conducted at the same loads to evaluate the time-temperature-creep relationships of the geogrid.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01496115
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Farrag, K
  • Shirazi, H
• Publication Date: 1997-12

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 414-422
• Serial:
  • Geotechnical Testing Journal
  • Volume: 20
  • Issue Number: 4
  • Publisher: ASTM International
  • ISSN: 0149-6115
  • EISSN: 1945-7545
  • Serial URL: https://www.astm.org/products-services/standards-and-publications/geotechnical-testing-journal.html

Subject/Index Terms

• TRT Terms: Accelerated tests; Creep tests; Geosynthetics; Geotextiles; High temperature; Laboratory tests; Polyester resins; Temperature
• Uncontrolled Terms: High density polyethylene
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00809306
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 9 2001 12:00AM