Method and composition for road construction and surfacing
Methods and compositions for improving the strength and longevity of secondary roadways through environmentally sound practices are disclosed herein. A composition for road sealing includes acrylic and vinyl acetate powdered polymer mixed with native soil.
1. A composition for road sealing, the composition comprising:
an acrylic and vinyl acetate powdered polymer;
water; and,
a resin-modified emulsion, wherein the resin-modified emulsion comprises:
a mixture of pitch and rosin;
an emulsifying agent; and,
water, wherein the composition is substantially free of asphalt, wherein the composition is water insoluble when dispersed on aggregate material.
2. The composition of claim 1 , wherein the composition further comprises:
synthetic fibers.
3. The composition of claim 1 , wherein the acrylic and vinyl acetate powdered polymer are between about 5.0% and about 60.0% by weight, the water is between about 40.0% and about 94.0% by weight, and the resin emulsion between about 1.0% and about 55.0% by weight, wherein within the resin emulsion the pitch is between about 1.0% and about 95% by weight, the rosin is between about 1% to about 70%, the emulsifying agent is between about 0.1% to about 5.0% by weight, and the water is between about 10% to about 98% by weight.
4. The composition of claim 1 , wherein the composition further comprises:
a tack coat.
5. The composition of claim 4 , wherein the tack coat comprises: resin-modified emulsion of pitch, rosin, an emulsifying agent, and water; and, an acrylic and vinyl acetate powdered polymer.
6. The composition of claim 1 , wherein the composition is substantially free of polycyclic organic matter.
7. The composition of claim 1 , wherein the composition further comprises a curing agent, wherein the curing agent is about 0.1% to about 30.0% by weight.
8. The composition of claim 7 , wherein the curing agent is chosen from the group comprising hydraulic curing agents and non-hydraulic curing agents.
9. The composition of claim 1 , wherein the composition further comprises:
soil; and,
a binder, wherein a hydrophobic soil matrix is created, which limits water ingress.
10. A method for road sealing, the method comprising the steps of:
mixing an acrylic and vinyl acetate powdered polymer with associated native soil to form a road base;
applying to the road base a tack coat of resin-modified emulsion;
adding rock chips to the tack coat; and,
rolling the tack coat, wherein the composition is substantially free of asphalt, wherein the resin-modified emulsion is pitch, rosin, emulsifying agent, and water, wherein the method does not include any cementitious chemical reaction.
11. The method of claim 10 , wherein method comprises the steps of:
adding a binder to the road base; and,
adding synthetic fibers to the road base.
12. The method of claim 10 , wherein no polycyclic organic matter is used.
13. The method of claim 10 , wherein prior to the step of mixing an acrylic and vinyl acetate powdered polymer with associated native soil to form a road base, the method comprises the step of:
mixing a curing agent with associated native soil.
14. The method of claim 13 , wherein the curing agent is about 0.1% to about 20.0% by weight of the soil.
15. The method of claim 10 , wherein method comprises the steps of:
adding a binder to the road base; and,
adding synthetic fibers to the road base, wherein a hydrophobic soil matrix is created, which limits water ingress.
16. The method of claim 13 , wherein the curing agent is chosen from the group comprising non-hydraulic curing agents and hydraulic curing agents.
17. A composition for road sealing, the composition comprising:
about 5% to about 95% acrylic and vinyl acetate powdered polymer by weight; and,
a tack coat comprising at least one of an aqueous emulsion and a resin-modified emulsion, wherein the composition is substantially free of asphalt, wherein the composition is water insoluble when dispersed on aggregate material.
18. The composition of claim 17 , wherein the composition further comprises a curing agent.
19. The composition of claim 17 , wherein the composition further comprises a rheology modifier.
20. The composition of claim 19 , wherein the rheology modifier develops a non-Newtonian, pseudoplastic flow.