Introduction to the test procedure of composite geomembrane

The composite geomembrane is composed of one layer of geotextile and one layer of hdpe geomembrane or two layers of hdpe geomembrane. The geomembrane is a layer of hdpe film. What is the difference between the two? Geotextiles only need thermal fusion materials, and composite geotextiles need stitched geotextiles.






Test steps of composite geomembrane 1. Test steps of composite geomembrane. Site cleaning-material and equipment entry-material configuration-base cloth splicing-outside temperature measurement-welding parameter selection-welder test and adjustment-welding-welding inspection-face cloth Splicing-quality inspection-fill in the experiment record. 2. The parameters of the test process geomembrane welder include: temperature, pressure and speed. These three parameters need to be adjusted and matched to ensure a firm combination during geomembrane welding, which is an important factor in ensuring the quality of geomembrane welding. Therefore, during the implementation process, the following measures were taken: (1) Conduct the test welding operation of the geomembrane, take a 900mm or more than 300mm film for test welding, and use a tensile testing machine to perform welding shear and peel tests. If the test fails, please adjust the parameters and continue to test the welding. If the weldment passes the test, please record the three parameter values as the parameter settings of the welder during the formal welding. (2) Before welding, remove dust, dirt, oil and other garbage on the welding surface of the geomembrane to make the welding surface clean and dry. In order to ensure the reliable anti-seepage effect of the geomembrane welded joint, the geomembrane welding adopts double welding. (3) The width of the double rounded corners is 2*10mm, the overlapping width is more than 10cm, and a cavity of 1cm is left between the rounded corners. All geomembrane welding must be inflated one by one in strict accordance with the design requirements.