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US 7,452,159 B2Granted
Method of making a multi-layered structure for tree well skirt and sidewalks
AssigneeKaroleen B. Alexander
InventorKaroleen B. Alexander
Life of this patent
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Abstract
A flexible, porous and durable tree well skirt and a sidewalk structure are made of a cushion base of butadiene rubber and a wear layer of ethylene propylene diene monomer (EPDM). The butadiene rubber is mixed with an isocyanate polyurethane binder and spread on the ground around the tree to form the cushion base of the tree well skirt. The EPDM is mixed with an isocyanate polyurethane binder and spread over the cushion base to form the wear layer. The cushion base and wear layer structure used for a sidewalk is spread over a stabilized porous base.
Claims7
A method of forming a sidewalk, the steps of the method comprising:
- preparing a form to outline the sidewalk;
- preparing a leveling layer of porous composite material in the form;
- mixing a combination of butadiene rubber granules and peelings or buffings and a binder of isocyanate polyurethane to form a pourable slurry;
- varying the proportion of butadiene rubber granules relative to the amount of peelings or buffings in the combination to increase or decrease the porosity of a base layer of the sidewalk;
- pouring the slurry of rubber and binder in place in the form over the leveling layer to form the base layer of the sidewalk;
- leveling the poured rubber and binder slurry;
- mixing ethylene propylene diene monomer (EPDM) and a binder of isocyanate polyurethane to form a pourable slurry;
- pouring the slurry of EPDM and binder in place over the base layer to form a wear layer of the sidewalk;
- and
- leveling the poured EPDM and binder slurry.
7 more elements
Dependencies are inferred from the claim text.