Composition and method for covering soil
First Claim
1. A composition for use in forming a barrier to water penetration through soil, said composition comprising:
- a water-impermeable sheet having a first side and a second side;
a first adhesive layer carried by said first side of said sheet; and
a second adhesive layer carried by said second side of said sheet,said first and second adhesive layers enabling particles of said soil to adhere to said first and said second sides of said sheet so that a first layer of soil applied to said first side of said composition does not readily shift with respect to a second layer of soil applied to said second side of said composition, said composition preventing water from passing from said first layer of soil to said second layer of soil.
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Abstract
A composition and method for forming a water-impermeable barrier in soil such as for use in closing a waste disposal cell. The composition comprises a water-impermeable sheet to each side of which has been applied an adhesive such as polybutene. The sheet is a substantially nonflammable, water-impermeable, highly stretchable film, preferably a plasticized polyvinyl chloride-based or very low density polyethylene film. The composition is applied to a first layer of soil such as a landfill site and covered with a second layer of soil. When the first layer is sloped, several rows of the composition placed in adjacent, overlapping relationship, starting at the bottom of the slope. The soil particles in the first and second soil layers adhere to the sheet and enable the slope of the first layer to approach the shear angle for that type of soil. Thus, the disposal cell can have steeper sides and hold more waste than otherwise.
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Citations
20 Claims
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1. A composition for use in forming a barrier to water penetration through soil, said composition comprising:
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a water-impermeable sheet having a first side and a second side; a first adhesive layer carried by said first side of said sheet; and a second adhesive layer carried by said second side of said sheet, said first and second adhesive layers enabling particles of said soil to adhere to said first and said second sides of said sheet so that a first layer of soil applied to said first side of said composition does not readily shift with respect to a second layer of soil applied to said second side of said composition, said composition preventing water from passing from said first layer of soil to said second layer of soil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for covering a first layer of soil to impede the flow of water into said soil surface, said method comprising the steps of:
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placing at least one substantially water-impermeable sheet onto said first layer, said sheet having two sides, said sheet coated on each of said two sides with a layer of soil-adhering adhesive; and covering said sheet with a second layer of soil. - View Dependent Claims (14, 15)
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16. A method of closing a waste disposal cell, said cell containing waste, said method comprising the steps of:
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covering said waste with a first layer of soil; placing a plurality of sheets of a substantially water-impermeable material having two sides onto said first layer of soil, each of said two sides being coated with a layer of soil-adhering adhesive; and covering said plurality of sheets with a second layer of soil, said adhesive layers enabling particles of said soil to adhere to said two sides of said material so that said first layer of soil does not readily shift with respect to said second layer of soil, said plurality of sheets preventing water from passing from said first layer of soil to said second layer of soil. - View Dependent Claims (17, 18, 19, 20)
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Specification