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nonwoven geotextiles. The bentonite shall be a high quality, natural sodium <br /> bentonite.. <br /> 2. The GCL shall be internally reinforced through a process such as needle <br /> punching through the top and bottom layers of geotextile and the bentonite. <br /> The reinforcing fibers shall be a polypropylene thread. The tensile strength <br /> of the fibers shall not be affected by hydration with water. <br /> 3. Prior to packaging the finished product, the manufacturer shall inspect each <br /> roll, over the entire surface area, for the presence of sewing needles. All <br /> needles shall be removed or the rolls shall be rejected. <br /> 4. The bentonite will be adhered to the backing material in a manner that <br /> prevents it from being dislodged when transported, handled, and installed in <br /> a manner prescribed by the manufacturer. The water content of the <br /> bentonite shall not be greater than either12 percent, by weight, or the initial <br /> moisture content measured at the time of passing conformance shear <br /> strength tests. <br /> 5. The interfacial and internal shear strength of the side slope liner system will <br /> be tested per ASTM D6243 and ASTM D5321 to post-peak conditions. <br /> Post-peak conditions are defined as the point at which the applied shear <br /> force remains constant with increasing shear displacement. The minimum <br /> post-peak shear displacement shall be 3 inches. In testing, upper or lower <br /> boxes can be interchanged depending on the type of equipment. Submit, <br /> one each, 6"x6" coupons of geomembrane and GCL from the rolls of <br /> material that were used for each test. Testing shall be performed such that <br /> orientation of materials being tested (i.e. which side is up) is consistent with <br /> orientation of installation in the field. <br /> a. The QA/QC CONSULTANT shall perform the shear strength testing <br /> per ASTM D6243 for the proposed liner system components (GCL <br /> 'vs. geomembrane and geocomposite drainage net) in accordance <br /> with the following: <br /> 1) Measure initial moisture content of the bentonite component of the <br /> GCL. <br /> 2) Measure the asperity of the geomembrane [GRI GM-12]. <br /> 3) Hydrate GCL under 125 psf normal stress for 20 hours with distilled <br /> water. <br /> 4) Anchor lower geotextile component of site-specific GCL to lower <br /> shear box. The upper geotextile component of GCL shall not be <br /> anchored to the box. The GCL test shall be assembled the same way <br /> as the materials will be deployed in the field. <br /> 5) Spray upper surface of GCL with water. <br /> 6) Place the HDPE geomembrane (per Section 02778) above the GCL. <br /> ® Forward Landfill WMU FU-13 5 GEOSYNTHETIC CLAY LINER(GCL) <br /> 02777 <br />