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Materials 2013, 6(9), 4109-4121; doi:10.3390/ma6094109

The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Author to whom correspondence should be addressed.
Received: 29 July 2013 / Revised: 28 August 2013 / Accepted: 10 September 2013 / Published: 17 September 2013
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To investigate the gradual failure of high-density polyethylene (HDPE) geomembrane as a result of long-term corrosion, four dynamic corrosion tests were conducted at different temperatures and durations. By combining tension and puncture tests, we systematically studied the variation law of tension and puncture properties of the HDPE geomembrane under different corrosion conditions. Results showed that tension and puncture failure of the HDPE geomembrane was progressive, and tensile strength in the longitudinal grain direction was evidently better than that in the transverse direction. Punctures appeared shortly after puncture force reached the puncture strength. The tensile strength of geomembrane was in inversely proportional to the corrosion time, and the impact of corrosion was more obvious in the longitudinal direction than transverse direction. As corrosion time increased, puncture strength decreased and corresponding deformation increased. As with corrosion time, the increase of corrosion temperature induced the decrease of geomembrane tensile strength. Tensile and puncture strength were extremely sensitive to temperature. Overall, residual strength had a negative correlation with corrosion time or temperature. Elongation variation increased initially and then decreased with the increase in temperature. However, it did not show significant law with corrosion time. The reduction in puncture strength and the increase in puncture deformation had positive correlations with corrosion time or temperature. The geomembrane softened under corrosion condition. The conclusion may be applicable to the proper designing of the HDPE geomembrane in landfill barrier system. View Full-Text
Keywords: landfill; corrosion of leachate; HDPE geomembrane; tension properties; puncture properties landfill; corrosion of leachate; HDPE geomembrane; tension properties; puncture properties

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Xue, Q.; Zhang, Q.; Li, Z.-Z.; Xiao, K. The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate. Materials 2013, 6, 4109-4121.

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