Tensile and Creep Behavior of Polyvinyl Chloride-Coated Polyester Geogrid at Different Temperatures

This study investigates the tensile and creep behavior of a PVC coated polyester geogrid at different temperatures. The ultimate tensile strength of the test geogrid is 128x115 kN/m. The geogrid was fabricated using knitting and woven techniques. A series of tensile tests (ASTM D6637) and conventional long-term (ASTM D5262) creep tests were performed to evaluate the tensile strength, elongation at rupture and long-term creep strains of the geogrid. The test results indicated that the ultimate tensile strength of the PET geogrid linearly decreased as the test temperature increased down to 60ºC. The tensile strength decreasing rate is about -0.33% per degree of Celsius. The elongation at break for the tested conditions varied from 0ºC to 60ºC at about 11%. The tensile strength and elongation at break for the 80ºC test condition was inconsistent with the results from other test conditions. It is believed that the phenomenon of glass formation might have some effects on the engineering behavior of the test geogrid at around 80ºC. The creep strain rate also increased as the test temperature was increased under same tensile load condition. Linear creep strain rates were observed from a series of conventional long-term test product creep tests. Under conditions with same creep tensile load or same percentage UTS tensile load under higher temperature conditions presented higher total creep strain and associated creep strain rate. However, the creep modulus decreased as the test temperature was increased. The creep strain rate increase could be up to 80% for temperature condition changes from 20ºC to 40ºC.

• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Hsieh, Chiwan Wayne
  • Tseng, Yen-Chen
• Conference:
  • Transportation Research Board 88th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2009-1-11 to 2009-1-15
• Date: 2009

Language

• English

Media Info

• Media Type: DVD
• Features: Photos; References; Tables;
• Pagination: 25p
• Monograph Title: TRB 88th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

• TRT Terms: Creep; Geogrids; Load tests; Modulus of rupture; Polyvinyl chloride; Soil mechanics; Temperature; Tensile strength
• Uncontrolled Terms: Elongation
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01122224
• Record Type: Publication
• Report/Paper Numbers: 09-1217
• Files: TRIS, TRB
• Created Date: Feb 19 2009 2:43PM