Abstract
Puncture resistance of geomembrane is very important property when it is used to a component of liner in waste landfill. An amount of puncture resistance may depend on not only its tensile strength but also a pre-strain and underlying ground strength. In the test, three types of geomembranes such as HDPE, FPA, EPDM and geotextiles called continuous non-woven and stapled non-woven were used as a test specimen.
The authors, first, conducted the puncture resistance test of geomembrane on the modeled ground which was compacted in different strength. Then they conducted the puncture resistance test of geomembrane overlying the geotextile on the modeled ground. As the result, it is found that puncture resistance increased proportionally to ground strength and the ground having more than 700kN/m2 of qc is desirable for the base. Last they lengthened the test specimen by 0% to 20% in length previously to put pre-strained condition and then conducted puncture tests. These tests showed that the HDPE with 20% pre-strain decreased 16% of maximum puncture resistance.
