Interface shear-strength properties of roughened HDPE

Journal Article · Fri Apr 01 00:00:00 EST 1994 · Journal of Geotechnical Engineering; (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9410(1994)120:4(758)· OSTI ID:7303604

Orman, M E ^[1]

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1. Vector Engineering Inc., Grass Valley, CA (United States)

Since 1988, when roughened high-density polyethylene (HDPE) membrane was first introduced to the marketplace, manufacturers have publicized its superior interface frictional characteristics compared to smooth HDPE membrane. Engineers soon began using roughened membranes to help increase the resisting forces along the geosynthetic interfaces of their lined impoundment designs. From the Kettleman Hills landfill failure the authors learned the importance of geosynthetic interface shear strength testing and how much these interfaces can effect a design. Large-scale interface shear testing is now routinely performed by engineers as part of the design process. There are currently four major manufacturers of roughened HDPE in the US. As part of this study, it was determined that roughened membranes have texturing depths that range between 0.3 and 0.7 mm. The depths of texturing currently available appear to be deep enough to mobilize the full shear strength for most fine-grained materials. However, the results of this study showed that the available depth of texturing may not be enough to fully mobilize material shear strengths of coarse-grained materials. This technical note presents the results of large-scale direct shear interface friction tests between two types of granular materials and smooth and roughened HDPE. The results of this testing confirms the importance of testing all geosynthetic interfaces when performing a lined-containment analysis and design. It also appears that there is a direct relationship between the depth of texturing and the amount of granular material shear strength that is mobilized. This relationship is dependent on the grain size of the material and its ability to interlock with the texturing.

• OSTI ID: 7303604
• Journal Information: Journal of Geotechnical Engineering; (United States), Vol. 120:4; ISSN 0733-9410
• Country of Publication: United States
• Language: English

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