Typical addition rates for the application of bentonite for sealing dams walls.
| Bentonite Minimum Addition Rates* | ||
| Soil Type | Kg/m2 | Kg/m2 |
| Fractured Rock or Gravel | 10 | 8 |
| Clean Sand | 10 | 8 |
| Silty Sand | 8 | 5 |
| Sandy Silt | 8 | 5 |
| Clay | 6 to 9 | 7 |
* Please seek professional advice if you are unsure. Data shown is for 50 – 75mm seal. Conditions may require a thicker seal.
Volclay SG is a granular bentonite product applied via the sprinkle method.
Volclay SP is a powdered bentonite product applied via the blanket method, pure of mixed.
Bentonite is inert except for a light alkalinity and it can be dried & re-swelled an infinite number of times.
We also sell a high quality fine grade gypsum powder suitable to reduce sediment in dam water to improve water quality.
