Polyurethane based road forming

摘要

Provided herein are roadways containing polyurethane materials. A roadway includes a base layer of a compacted in situ material and/or a wear layer disposed on the base layer. One or both of these layers may include the polyurethane material to bind other components in the layers and to form more robust and durable roadway structures capable of withstanding operating loads of the roadway. In some embodiments, the polyurethane material is added to the wear layer by mixing in situ soil and/or foreign aggregate with polyurethane material or by dispensing the polyurethane material over the existing partially formed wear layer. The base layer may or may not include a polyurethane material. The type, concentration, distribution, and processing of the polyurethane material in the wear layer may be the same or different than that in the base layer.

主权项

1. A method of forming a roadway, the method comprising:
providing a reclaimer-stabilizer machine,
wherein the reclaimer-stabilizer machine is configured to pulverize an in situ soil and to combine at least one polyurethane precursor into the pulverized in situ soil; pulverizing the in situ soil using the reclaimer-stabilizer machine; combining the pulverized in situ soil with the at least one polyurethane precursor using the reclaimer-stabilizer machine,
wherein the combining forms a polyurethane filled soil material,wherein a concentration of the at least one polyurethane precursor in the polyurethane filled soil material is between about 2% by weight and 20% by weight; and compacting the polyurethane filled soil material using the reclaimer-stabilizer machine, wherein the compacting forms a layer of the roadway.