Advantages of RAWMAT® HDB » Vs. Dry Bentonite GCLs
RAWMAT® HDB is a fundamental breakthrough in barrier technology, and leaves the factory as a complete, functioning system.
The following table explains the advantages of RAWMAT® HDB over Dry Bentonite GCLs in more detail.
| Dry Bentonite GCLs | RAWMAT® HDB |
|---|---|
| Use dry bentonite - cannot guarantee correct hydration. | RAWMAT® HDB is pre-hydrated in factory controlled conditions. |
| Highly susceptible to cation exchange. | Polymer complex within RAWMAT® HDB prevents cation exchange. |
| Loose bentonite falls out when damaged or mishandled. | Vacuum extrusion creates a Plasticine-like consistency. |
| Loss of bentonite is often not evident, esp. cutting to pipes etc. | Plasticine-like consistency means no loss of bentonite. |
| "Bald" or "Fat" patches as the bentonite moves within fabrics. | Plasticine-like consistency means no loss or movement of bentonite within fabrics. |
| Some dry GCLs require additional bentonite applied between the joints. | RAWMAT® HDB forms self-sealing overlaps without additional bentonite. |
| Dry GCLs use thick non-woven geotextiles which potentially cause leakage at structures/penetrations within the design and at overlaps. | RAWMAT® HDB geotextiles allow intimate seal between membrane and structures. |
| Many published papers on failures of dry bentonite GCLs. | RAWMAT® HDB does not breakdown through cation exchange. |
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All information contained within this site is given in good faith and is correct to the best of Rawell Environmental Ltd.'s knowledge. However, this information is not legally binding and may be changed at any time without notice. Rawell offer a free advisory service, please Contact Us for more details. RAWMAT® and RAWSEAL® are registered trademarks of Rawell Environmental Ltd.