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<br /> <br /> <br />Forward Landfill WMU FU-23 4 GEOSYNTHETIC CLAY LINER (GCL) <br />02777 <br />Table 02777-1 <br />Properties for Geosynthetic Clay Liner <br />Property Test Method Test Frequency Required Values <br />Bentonite Swell Index ASTM D 5890 1 per 100,000 lb 24 mL/2g min. <br />Bentonite Fluid Loss ASTM D 5891 1 per 100,000 lb 18 mL max. <br />Bentonite Mass/Area ASTM D 5993 40,000 sf 0.75 lb/sf <br />GCL Grab Strength ASTM D 6768 200,000 sf <br />150 lbs <br />45 lbs/in <br />GCL Peel Strength ASTM D 6496 40,000 sf 10 lbs/in <br />GCL Index Flux ASTM D 5887 1 per week 1 x 10-8 m3/m2/sec max <br />GCL Hydraulic Conductivity ASTM D 5887 1 per week 5 x 10-9 cm/sec max <br />Interface Shear Strength <br /> (post-peak) <br />GCL/Geomembrane/Geocomposite <br />Drainage Net1 <br />ASTM D6243 1 per project <br />φres = 7° <br />c = 0 psf <br />Notes: <br />1 The interface shear strength testing will be performed by the QA/QC CONSULTANT. <br /> 1. The GCL shall consist of a layer of bentonite encapsulated between two nonwoven geotextiles. The bentonite shall be a high quality, natural sodium bentonite. 2. The GCL shall be internally reinforced through a process such as needle punching through the top and bottom layers of geotextile and the bentonite. The reinforcing fibers shall be a polypropylene thread. The tensile strength of the fibers shall not be affected by hydration with water. 3. Prior to packaging the finished product, the manufacturer shall inspect each roll, over the entire surface area, for the presence of sewing needles. All needles shall be removed or the rolls shall be rejected. 4. The bentonite will be adhered to the backing material in a manner that prevents it from being dislodged when transported, handled, and installed in a manner prescribed by the manufacturer. The water content of the bentonite shall not be greater than either 12 percent, by weight, or the initial moisture content measured at the time of passing conformance shear