Geomembrane is a kind of waterproof barrier material taking high-molecular polymer as the basic raw material of the, mainly divided into: low density polyethylene (LDPE) geomembrane, high density polyethylene (HDPE) geomembrane and EVA geomembrane, which have good errosion resistance to bacteria and chemistry, not afraid the erosion of acid, alkali and salt, testing their resistance to errosion during test.
First laying: Overall consideration of reducing the seams and convenient construction, selecting the composite geomembrane of appropriate width, with single-sided margin of 10cm and neat scrapped edge. The debris on the ground should be cleaned up and the size, flatness and compactness of slope cutting site should be subject to the acceptance of supervising engineer before laying the geomembrane. Connection: Usually using sweat soldering method
The testing standards of geomembrane: 1. GM1 ultrasonic method evaluation joint 2. GM2 anchoring movement insert depth 3. GM3 large-scale hydrostatic force anti-puncture test (see ASTM D5514) 4. GM4 three-dimensional geomembrane tensile test (see ASTM D5617) 5. GM5 (a) polyolefin resin or geomembrane notched constant tensile load (NCTL) test (1992) (see ASTM D5397) 6. GM5 (b) polyolefin resin or geomembrane single point NCTL test (see Appendix ASTM D5397 ) 7. GM5 (c) polyolefin geomembrane joint joint constant tensile load (SCTL) test 8. GM6 dual-channel joint geomembrane high-pressure airway test 9. GM7 chemical welding method geomembrane joint peeling accelerated solidification test 10.GM8 quarry-faced geomembrane core layer thickness measurement (see ASTM D5994) 11.GM9 geomembrane low temperature joint 12.GM10 HDPE geomembrane sheet stress cracking resistant standard 13. GM11 conduct geomembrane accelerated aging test with fluorine light irradiation device 14. GM12 measure the roughness of quarry-faced geomembrane with depth?indictor 15. GM13 high density polyethylene (HDPE) geomembrane test characteristics, test frequency and recommendation guarantee 16. GM14 take samples and choose a variety of intervals for geomembrane non-destructive test joint samples with characteristic test method 17. GM15 confirm bonding between layers of reinforced geomembrane 18. GM16 geomembrane surface cracking observation 19. GM17 linear low density polyethylene (LLDPE) geomembrane with smooth and rough surfaces test characteristics, test frequency and recommendation guarantee 20, GM19 LLDPE HDPE welding shear peel strength
