Formulation gate
Polymer modification is not a universal pass. Match the formulation to representative pH, ionic strength, Ca²⁺, Mg²⁺, Na⁺, sulfate and chloride conditions.
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GCL TECHNICAL DATAMANUFACTURING ROUTECETCO® / Minerals Technologies Inc.
AUSTRALIAN ROUTEProposed preferred technical distributor
TECHNICAL DATA SHEET · AUSTRALIAN FORMAT
RESISTEX® U20 ST
Polymer-enhanced GCL
A reinforced GCL containing polymer-modified bentonite, engineered to retain low hydraulic conductivity in chemically aggressive liquids.
Kontain position
A starting formulation for saline, divalent-ion or aggressive leachates. Final product selection should be linked to representative site-fluid compatibility testing.
FORMATAustralian SI units
SOURCECETCO Americas TDS, March 2021
STATUSPreliminary product comparison
ISSUED17 July 2026
PUBLISHED PERFORMANCE
Metric values, with the test conditions visible.
Values below are presented in Australian engineering units. CETCO’s published ASTM methods are retained; the units have changed, not the underlying test method or acceptance basis.
Dry bentonite≥ 3.7 kg/m²
Dry total mass≥ 4.0 kg/m²
Hydraulic conductivity≤ 3 × 10⁻¹¹ m/s†
Published internal shear24 kPa typical peak*
| Property | Published / specified value | Test method | MQC / published frequency |
|---|---|---|---|
| Woven base geotextile massMARV | ≥ 108 g/m² | ASTM D5261 | 1 per 20,000 m² |
| Nonwoven cap geotextile massMARV | ≥ 203 g/m² | ASTM D5261 | 1 per 20,000 m² |
| Bentonite moistureMaximum | ≤ 12% | ASTM D4643 | 1 per 50 tonnes |
| Bentonite swell index | ≥ 24 mL/2 g | ASTM D5890 | 1 per 50 tonnes |
| Bentonite fluid loss | ≤ 18 mL | ASTM D5891 | 1 per 50 tonnes |
| Dry bentonite mass per unit area | ≥ 3.7 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| Dry total mass per unit area | ≥ 4.0 kg/m² | ASTM D5993 | 1 per 4,000 m² |
| GCL moistureMaximum | ≤ 35% | ASTM D5993 | 1 per 4,000 m² |
| GCL grab strengthMARV | ≥ 5.3 kN/m | ASTM D6768 | 1 per 20,000 m² |
| Peel strengthMinimum | ≥ 0.61 kN/m | ASTM D6496 | 1 per 4,000 m² |
| Hydraulic conductivity — deionised waterMaximum | ≤ 3 × 10⁻¹¹ m/s | ASTM D5887 | 1 per 25,000 m² |
| Hydraulic conductivity — 0.02 M CaCl₂Maximum | ≤ 3 × 10⁻¹¹ m/s | ASTM D6766 | 1 per 100,000 m² |
| Hydrated internal shearAt 9.6 kPa normal stress | 24 kPa typical peak* | ASTM D6243 / D5321 | 1 per 100,000 m² |
* Published typical peak value after hydration at approximately 9.6 kPa normal stress; not a minimum design envelope. † Published RESISTEX U20 ST maximum in deionised water and 0.02 M CaCl₂. Current factory certificates and project specifications govern.
DESIGN TRANSPARENCY
What still needs to be verified.
A compliant index value does not remove project-specific hydraulic, stability or installation risk.
Testing gate
Use the published deionised-water and calcium-chloride values as screening data. Long-term testing with representative site liquid should govern selection.
Stability gate
Hydraulic chemistry and slope stability are separate verifications. Test internal and interface shear using the proposed configuration and adjoining materials.
SUPPLY + CUSTOMISATION
Quote the configuration the project actually needs.
Approximately 209 m² gross and 200 m² effective after standard overlaps. Confirm current factory dimensions, mass and origin for every order.
A budgeting assumption only. Final payload and pack plan require CETCO confirmation. Full production and freight lots generally support the strongest landed rate.
Alternative reinforcement and RESISTEX formulations can be evaluated where slope demand, adjoining interfaces or site liquid require a different configuration.
SOURCE + CONTROL
Kontain presentation. CETCO source data.
This webpage is a Kontain-prepared Australian presentation of CETCO published data. It is not a manufacturer reissue and should not be used to override a current CETCO TDS, certificate of analysis, project specification or engineering assessment.