HDL-GCL R40-020 · TECHNICAL DATA
Kontain HDL-GCL Reinforced 40 020
Revision D · 5 November 2026
Reinforced 40 specifies ≥4,000 g/m² dry bentonite with a woven/nonwoven composite carrier and bonded 0.20 mm LDPE film.
Cover nonwoven ≥200 g/m²; carrier ≥300 g/m². All values are specified supply requirements requiring exact-grade confirmation.
Technical data.
Specified supply requirements. Exact grade confirmation and traceable production verification are required before supply. These values are not certified results for each finished laminate. The controlled modified-swell procedure specifies reagent water (distilled or deionised water meeting ASTM D1193), a 16 h reading after the final clay increment, and a separate 20,000 mg/L NaCl solution prepared in reagent water for saline screening. Record later readings separately if swelling continues. ASTM D5890-25 excludes polymer-containing clays, so report these tests as modified, not as unmodified ASTM compliance. Sanderay AS catalogue values are ≥28 mL/2 g in tap water and ≥22 mL/2 g in 20,000 ppm salty water. Its salt composition and duration are unspecified. The defined reagent-water, NaCl and 16 h conditions above are Kontain acceptance conditions requiring supplier confirmation; the catalogue does not verify results under those exact conditions.
| Property | Method / basis | Value |
|---|---|---|
| Dry bentonite mass | ASTM D5993 plus formulation records | ≥4,000 g/m² excluding polymer |
| Cover nonwoven | ASTM D5261 | ≥200 g/m² |
| Carrier woven | ASTM D5261 | ≥100 g/m² |
| Carrier nonwoven | ASTM D5261 | ≥200 g/m² |
| Total carrier | Component minima | ≥300 g/m² |
| Bentonite formulation | Controlled source and formulation | Polymer-modified sodium bentonite powder |
| Nominal film thickness / resin | Nominal construction | 0.20 mm LDPE |
| Tensile strength MD / CMD | ASTM D6768 | ≥10 / ≥10 kN/m |
| Internal GCL peel | ASTM D6496 | ≥360 N/m |
| PE to cover peel | Agreed PE/nonwoven method; bonded areas | ≥300 N/m |
| CBR puncture | EN ISO 12236 | ≥2,500 N |
| Hydrated peak internal shear | ASTM D6243 | ≥35 kPa at 10 kPa normal stress |
| Montmorillonite | Quantitative XRD; parent bentonite | >70 wt% |
| Carbonate mineral content | Quantified mineral phases; parent bentonite | <5 wt% |
| Cation exchange capacity | Declared laboratory method | ≥70 meq/100 g |
| Powder grading | Validated particle-size method | ≥80% passing 75 µm |
| Moisture content | ASTM D5993 | ≤13% |
| Fluid loss | D5891-based modified-blend procedure | ≤18 mL |
| Modified swell in reagent water | ASTM D5890-based modified method; 16 h after final increment | ≥28 mL/2 g |
| Modified swell in saline liquid | ASTM D5890-based modified method; 16 h after final increment; 20,000 mg/L NaCl | ≥22 mL/2 g |
| Core conductivity in fresh water | D5084 with agreed GCL setup | ≤3.0 × 10⁻¹¹ m/s |
| Core conductivity in 20,000 mg/L NaCl | D6766 within scope; identify adaptations | ≤1.0 × 10⁻¹⁰ m/s |
| Fresh-water core index flux q10 | ASTM D5887 | ≤2.7 × 10⁻⁹ m³/m²/s |
| Released longitudinal film zone | Specified joint detail | 400 mm |
| Direct GCL contact / PE overlap | Separate widths at longitudinal joint | ≥300 / ≥300 mm |
| Extrusion sealing | Actual assembly procedure | No |
| Wedge welding | Current thin-film range | No |
Download the full TDS for the product construction and supply requirements.
Selection and installation.
Hydraulic values apply to the geotextile-backed GCL core, not the PE film or the completed joint. Confirm confinement, hydraulic gradient, hydration sequence, permeant composition and equilibrium criteria in the order test schedule. The AS catalogue lists D5887 beside conductivity; D5887 measures index flux. Report conductivity using D5084 with an agreed GCL setup; use D6766 within scope for chemical permeation and identify any adaptations. Assess the film-backed assembly separately. Peak internal shear is not a residual design strength. Review actual subgrade, contact-liquid chemistry and confinement. The 0.50 mm option requires manufacturing qualification; extrusion sealing also requires a qualified procedure. No wedge welding. The commercial carbonate limit does not establish landfill-specification compliance.
Common rolls are 5 m × 30 m (150 m² gross). Custom dimensions, bentonite masses and plastic or steel cores are available by order. Confirm gross roll mass and clear core bore before lifting.
Provide the liner section, contact-soil grading and chemistry, liquid analysis, slope, loading, installation method and delivery requirements.
Read the installation guidance →