Aging of High-Density Polyethylene Geomembranes of Three Different Thicknesses

作者：Rowe R Kerry^*; Abdelaal Fady B; Islam M Zahirul

来源：Journal of Geotechnical and Geoenvironmental Engineering, 2014, 140(5): 04014005.

DOI：10.1061/(ASCE)GT.1943-5606.0001090

• Geomembranes
• Aging (material)
• Service life
• Degradation
• Landfills
• Cracking
• Geomembrane
• Aging
• Antioxidant depletion
• Nominal failure
• Service life
• Degradation
• High-density polyethylene (HDPE)
• Landfill
• Stress crack resistance

The effect of geomembrane thickness (1.5, 2.0, and 2.5 mm) on aging when immersed in a synthetic leachate is investigated over a period of approximately 7 years. Based on data at five different temperatures (55, 65, 70, 75, and 85 degrees C), the predicted time required for a reduction in stress crack resistance to 150 h (half the typically specified value) at 35 degrees C is 62% longer for the 2.5 mm than for the 1.5-mm geomembrane tested and 12% longer for the 2.0-mm than for the 1.5-mm geomembrane. Thus, other things being equal, the results suggest a longer time to nominal failure with increasing geomembrane thickness. It is also shown that the data from a proposed stage-parallel testing procedure collected over 2.5 years fit well with data from traditional incubation of virgin samples over almost 7 years and hence provides a viable means of obtaining good data in a reasonable period of time.

• 出版日期2014-5-1