A soil stabilization mixture comprising a mixture of soil to be stabilized, fibers and binder. The soil and the fibers are mixed together. The binder, which acts as a chemical stabilizer, is then added and mixing continues. The mixture is then applied to the soil to be stabilized and the stabilized soil is then compacted. The fibers can be recycled carpet fibers, fiber reinforced polymer, biofibers or a mixture thereof. The binder includes mixtures of Portland cement and at least one of crushed glass, metakaolin and ground blast furnace slag.

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed.

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed.

A method for installing hot asphalt pavement includes heating an aggregate to a temperature of from about 350 F. to about 400 F. using an emitter comprising a birefringent material, the emitter generating electromagnetic radiation having a wavelength of from 2 microns to 1 millimeter, wherein the aggregate is a recycled asphalt pavement; adding the aggregate to an asphalt in a mill to yield a mixture of aggregate with baked-on asphalt; laying the mixture down over a base to form a first layer of lift; and compacting the first layer.

A bituminous emulsion that is capable of being used as a penetrating prime emulsion. The penetrating prime emulsion may be capable of penetrating compacted soil without the use of solvent, and may toughen quickly to allow early application of a paved layer on the surface. The bituminous emulsion may comprise bituminous material and an emulsifier comprising octylphenol ethoxylates, and optionally further comprising tallow diamine betaines or other betaines.

A bituminous emulsion that is capable of being used as a penetrating prime emulsion. The penetrating prime emulsion may be capable of penetrating compacted soil without the use of solvent, and may toughen quickly to allow early application of a paved layer on the surface. The bituminous emulsion may comprise bituminous material and an emulsifier comprising octylphenol ethoxylates, and optionally further comprising tallow diamine betaines or other betaines.

The composition for stabilizing clay-loam soils in the form of a liquid solution includes at least one multifunctional organic compound in the form of derivatives of aromatic or heterocyclic, or alicyclic, or aliphatic compounds, in an amount of 20-40% by weight of the total composition. There is at least one acidic surfactant in an amount of 2-10% by weight of the total composition. There is at least one trivalent metal compound in an amount of 1.0-2.5% by weight of the total composition. There is also sulphuric acid, in an amount of up to 100% by weight of the total composition. The method of preparation and the method of stabilizing clay-loam soils involve the composition.

The composition for stabilizing clay-loam soils in the form of a liquid solution includes at least one multifunctional organic compound in the form of derivatives of aromatic or heterocyclic, or alicyclic, or aliphatic compounds, in an amount of 20-40% by weight of the total composition. There is at least one acidic surfactant in an amount of 2-10% by weight of the total composition. There is at least one trivalent metal compound in an amount of 1.0-2.5% by weight of the total composition. There is also sulphuric acid, in an amount of up to 100% by weight of the total composition. The method of preparation and the method of stabilizing clay-loam soils involve the composition.

A method for repairing an aged asphalt pavement is provided. The method involves passing an emitter over the aged asphalt pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from 20 microns to 1 mm that penetrates into the pavement to a depth of at least 2 inches. The asphalt pavement is repaired by disturbing voids and interstices in the damaged pavement without dehydrogenation of the asphalt, such that oligomers present in the aged asphalt are linked together into longer polymer chains to improve ductility of the aged asphalt.

A method for repairing an aged asphalt pavement is provided. The method involves passing an emitter over the aged asphalt pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from 20 microns to 1 mm that penetrates into the pavement to a depth of at least 2 inches. The asphalt pavement is repaired by disturbing voids and interstices in the damaged pavement without dehydrogenation of the asphalt, such that oligomers present in the aged asphalt are linked together into longer polymer chains to improve ductility of the aged asphalt.