| ITEM |
CONVENTIONAL BENTONITE |
SUPER MUD |
| Physical Appearance |
Powder or granular form of clay; packaged in 50 or 100 pound paper bags |
White liquid; packagedin 5 gallon (19 litre) plastic pails |
| Mixing Ratio |
5%-8% solid depending on soil conditions |
800:1 (water to Super Mud) will produce a viscosity of 35-45 depending on water quality. 600:1 mixing ration in salt water |
| Preparation |
Requires 24 hours advanced mixing for full hydration and expensive agitator equipped batch tanks |
Mixes instantly; can be easily mixed in surface tanks or mixed directly in the excavation |
| Weight Comparison |
Adds volume and weight; weight increases with viscosity |
Adds volume but not weight; weight does not increase with viscosity alone |
| Settling Time |
Cuttings suspend in slurry for a long period of time; settling tank and desanding unit are needed |
Precipitates the cuttings to the bottom of the excavation allowing for easy removal with a clean out bucket |
| Salt Water Effects |
Separates and breaks down in salt water |
Works equally well in fresh and salt water |
| Recycling |
Slurry loses quality after 2-3 times of recycling |
Slurry may be recycled an unlimited number of times without losing quality |
| Concrete Placement |
High sand content, due to it's suspension properties; therefore affects the strength of the concrete |
Sand content after 15-30 minutes is usually less than 1.0% making concrete placement easy without affecting the strength |
| Environmental Effects |
Creates an impervoius layer; does not allow water passage, therefore preventing plant growth |
Degradable; friendly to the environment |
| Disposing |
Unwanted mud needs to be treated properly and taken to a landfill for disposal, this is a cost the contractors have to bear |
Can be broken down with household bleach or Hydrogen Peroxide; may be discharged in storm drain or left on ground to evaporate (depending on local regulations) |