Dominion Plastic Industries has developed a spray-on geotech lining to make secure temporary dams or reservoirs.
Based on the company’s Envelon 442, the geotech lining is simply sprayed on to act as a long-life dam liner suitable for mining and quarrying.
When the dam or reservoir is no longer needed it is drained and the non-toxic lining is peeled and removed to leave unpolluted ground.
According to Dominion, traditional solutions often need plastic welded sheets to completely line a dam, which means all panel joins need sealing perfectly.
In contrast, preparation for the geotech liner only needs a general padding down of the soil, sand or other reasonably solid surface before spraying.
Dominion managing director Euan Sutherland says the lining saves time, money and the environment.
“Using spray equipment, [the lining] is applied to the compacted bed of the reservoir and after applying fast-drying coats it forms a very strong, highly flexible basin,” Sutherland says.
“Because Envelon 442 is non-toxic it conserves water, protects soil and doesn’t leach into the ground. It can follow the contour of any excavation whereas plastic sheets cannot It is UV stable and can withstand long term external exposure.
“Being very elastic it can withstand immense ground movement and is not restricted to any dimensions where plastic would be expensive and difficult.
“It can be reinforced with fibreglass mesh without losing flexibility, is almost indestructible, meets potable drinking standards, and when the job is done Envelon 442 is simply pulled out of the ground leaving no residue or soil damage,” he says.
Because Envelon is a liquid, it is quickly and easily applied, and leaves no seams, butts or leaks. It needs no protective or decorative overcoat and is touch dry in 30 minutes.
It is waterproof above or below ground.