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i • • <br /> AT® ST CERTIFIED PROPERTIES <br /> MATERIAL PROPERTY TEST METHOD;yTEST FREQUENCY REQUIRED VALUES <br /> s ' ftz(m2) <br /> Bentonite Swell Index' ASTM D 5890 1 per 50 tonnes 24 ml/2g min. <br /> Bentonite Fluid Loss' ASTM D 5891 1 per 50 tonnes 18 ml max. <br /> Bentonite Mass/Area2 ASTM D 5993 40,000 ft2 (4,000 m2) 0.75 Ib/ft2 (3.6 kg/M2) <br /> min <br /> GCL Tensile Strength ASTM D 6768 200,000 ft2 (20,000 m2) 30 lbs/in (53 N/cm) MARV <br /> GCL Peel Strength3 ASTM D 6496 40,000 ft2 (4,000 m2) 3.5 lbs/in (6.1 N/cm) min <br /> GCL Index Flux4 ASTM D 5887 Weekly 1 x 10-8 m3/m2/sec max <br /> GCL Hydraulic ASTM D 5887 Weekly 5 x 10"9 cm/sec max <br /> Conductivity <br /> GCL Hydrated Internal ASTM D 5321 Periodic 500 psf(24 kPa) typ @ 200 psf <br /> Shear Strength5 ASTM D 6243 <br /> Bentomat ST is a reinforced GCL consisting of a layer of granular sodium bentonite between woven and <br /> nonwoven geotextiles, which are needlepunched together. <br /> Notes <br /> 'Bentonite property tests performed at a bentonite processing facility before shipment to CETCO's GCL production facilities. <br /> 2 Bentonite mass/area reported at 0 percent moisture content. <br /> 3 All tensile strength testing is performed in the machine direction using ASTM D 6768. All peel strength testing is performed using <br /> ASTM D 6496. Upon request,tensile and peel results can be reported per modified ASTM D 4632 using 4 inch grips. <br /> °Index flux and permeability testing with deaired distilled/deionized water at 80 psi(551 kPa)cell pressure,77 psi(531 kPa) <br /> headwater pressure and 75 psi(517 kPa)tailwater pressure. Reported value is equivalent to 925 gal/acre/day. This flux value is <br /> equivalent to a permeability of 5x10'9 cm/sec for typical GCL thickness. Actual flux values vary with field condition pressures. The <br /> last 20 weekly values prior the end of the production date of the supplied GCL may be provided. <br /> 5 Peak values measured at 200 psf(10 kPa)normal stress for a specimen hydrated for 48 hours. Site-specific materials,GCL <br /> products,and test conditions must be used to verify internal and interface strength of the proposed design. <br /> 2870 Forbs Avenue Hoffman Estates,!L 60192 <br /> 84Z851.1800 1 800.52Z9948 <br /> www.CETCO.com <br />