ARCHIVED REPORTS_2003_5 - Laserfiche WebLink

Home Browse Search

4) Anchor lower geotextile component of site-specific GCL to lower shear box. The upper geotextile component of GCL shall not be anchored to the box. If the GCL is BENTOMAT DN, the test shall be assembled so that the dark side shall be in contact with the textured side of the HDPE geomembrane (i.e., same way as will be deployed in the field). 5) Spray upper surface of GCL with water. 6) Attach the site-specific the geocomposite drainage net and HDPE geomembrane (per Section 02778) to the upper box. The geotextile side of the geocomposite drainage net shall be anchored to the upper box and the geonet side of the geocomposite shall be placed against the smooth side of the HDPE geomembrane. The textured side of the HDPE geomembrane shall be facing down and shall be placed over the GCL in the lower box. 7) Saturate under test normal stress for 16 hours. Use normal stresses of 1,000; 2,500; 5,000; and 10,000 psf. 8) Shear at 0.04 in./min per ASTM D6243. 9) The testing laboratory should report the interface where deformations are observed, the initial moisture content of the bentonite component of the GCL, and the asperity of the geomembrane [GM-12]. The minimum required interface and internal shear strengths of the composite liner system shall have a minimum friction angle of 12 degrees and an apparent cohesion of 0 psf and a friction angle of 5 degrees and an apparent cohesion of 375 psf for normal load ranges from 0 to 6,500 psf and from 6,500 to 12,000 psf,respectively. b. A sample of each tested GCL shall be cut and tested for moisture content [ASTM D 2216] before and after testing. Moisture contents shall be recorded and submitted with the test results. The testing laboratory shall submit a 6-inch square sample of the GCL from the roll used in the testing to the QA/QC CONSULTANT. C. The asperity of the geomembrane [GM-12] used in testing shall be recorded and the data submitted with the test results. The geomembrane used for testing shall be the same one that will be shipped to the site for construction of the liner. A 6-inch square sample of the geomembrane used in testing shall be submitted by the testing laboratory to the QA/QC CONSULTANT. PART 3 EXECUTION 3.1 FAMILIARIZATION A. Prior to implementing any of the work described in this Section, the GEOSYNTHETICS CONTRACTOR shall become thoroughly familiar with the site, the site conditions, and the portions of the work falling within this Section. FORWARD LANDFILL 5 02777 GEOSYNTHETIC CLAY LINER(GCL)