Method and composition for modifying soil and dust control
View Patent ↗A composition for chemical improvement of soil and road base materials including an aqueous solution of a water repellant and an aqueous emulsion of a soil stabilizer and dust retardant is herein disclosed.
1. A composition for chemical improvement of soil and road base materials, the composition comprising:
an aqueous solution of a water repellant comprising about 0.25% to about 5.0% by weight of potassium hydroxide; and,
an aqueous emulsion of a soil stabilizer and dust retardant, wherein the aqueous solution and aqueous emulsion have polymer components, wherein the polymer components have a molecular weight range of about 10 4 g/mol to about 10 10 g/mol.
2. The composition of claim 1 , wherein the water repellant further comprises about 10.0% to about 30.0% by weight of a methylsiliconate chosen from the group comprising potassium methylsiliconate and sodium methylsiliconate.
3. The composition of claim 2 , wherein water repellant further comprises about 65.0% to about 89.0% by weight of water, wherein the aqueous emulsion of a soil stabilizer and dust retardant comprises:
about 5.0% to about 60.0% by weight of polyacrylic acid; and
polyvinyl acetate.
4. The composition of claim 3 wherein the aqueous emulsion further comprises about 40.0% to about 95.0% by weight of water, wherein the composition further comprises an emulsifier.
5. The composition of claim 3 , wherein the polyacrylic acid and polyvinyl acetate comprises a mixture, the mixture being chosen from the group comprising homopolymers and copolymers.
6. The composition of claim 5 , wherein the polyacrylic acid and polyvinyl acetate mixture is present in ratios from about 1:1 to about 1:10,000 by mass of polyacrylic acid to polyvinyl acetate.
7. The composition of claim 5 , wherein the polyacrylic acid and polyvinyl acetate mixture is present in ratios from about 1:1 to about 1:10,000 by mass of polyvinyl acetate to polyacrylic acid.
8. The composition of claim 5 , wherein the blend of polyacrylic acid and polyvinyl acetate copolymers includes styrene butadiene rubber.
9. The composition of claim 1 , wherein the water repellant comprises:
about 2.5% to about 30.0% by weight of polyacrylic acid and polyvinyl acetate polymer;
about 0.5% to about 2.5% by weight of potassium hydroxide;
about 5.0% to about 15.0% by weight of potassium methylsiliconate; and
about 52.5% to about 92.0% by weight of water;
wherein the aqueous emulsion comprises:
about 3.75% to about 45.0% by weight of polyacrylic acid and polyvinyl acetate polymer; and the water repellant comprises:
about 0.25% to about 1.25% by weight of potassium hydroxide;
about 2.5% to about 7.5% by weight of potassium methylsiliconate; and
about 46.25% to about 93.5% by weight of water.
10. The composition of claim 1 , wherein the aqueous emulsion-comprises:
about 1.25% to about 15.0% by weight of polyacrylic acid and polyvinyl acetate polymer; and the water repellant comprises:
about 0.75% to about 3.75% by weight of potassium hydroxide;
about 7.5% to about 22.5% by weight of potassium methylsiliconate; and
about 58.75% to about 90.5% by weight of water.
11. The composition of claim 1 , wherein the aqueous emulsion of a soil stabilizer and dust retardant comprises about 0.1% to about 20.0% by weight of polyacrylic acid and polyvinyl acetate.
12. The composition of claim 11 wherein the composition further comprises about 0.1% to about 40.0% by weight of water.
13. A method for reducing capillary water uptake and preventing erosion, comprising the steps of:
(A) providing a composition comprising a heterogeneous mixture of an aqueous solution of a water repellant and an aqueous emulsion of a soil stabilizer and dust retardant, wherein the aqueous solution of the water repellant liquid comprises:
about 0.25% to about 5.0% by weight of potassium hydroxide;
about 10.0% to about 30.0% by weight of potassium methylsiliconate; and
about 65.0% to about 89.0% by weight of water;
(B) applying the composition to soil or road base materials, wherein the composition is applied at about 1 L/m 3 to about 100 L/m 3 ; and,
(C) allowing the composition to penetrate the soil or road base materials.
14. The method of claim 13 , wherein the aqueous emulsion of a soil stabilizer and dust retardant comprises:
about 5.0% to about 60.0% by weight of polyacrylic acid and polyvinyl acetate; and,
about 40.0% to about 95.0% by weight of water.
15. The method of claim 14 , wherein step (B) further comprises the steps of:
scarifying the soil or road base materials before applying the composition to the soil or road base materials;
pulverizing the soil or road base material in a mixing chamber using a pulvimixer; and,
mixing the composition with the pulverized material.
16. The method of claim 15 , further comprising step:
(D) grading and compacting the treated soil or road base materials.
17. The method of claim 16 , further comprising step:
(E) applying a top coat of the composition.
18. The method of claim 15 , wherein the pulvimixer has a rotor that turns at a rate of about 100 to about 200 rpm in the opposite direction to the pulvimixer's direction of travel, and the pulvimixer digs into the soil at a depth of up to about 500 mm.