Abstract: A new method is provided for emulsifying an asphalt-rubber pavement repair material into a stable thixotropic emulsion capable of flowing as a liquid upon gentle agitation. The method generally comprises the steps of heating asphalt and rubber to form a jellied reaction product, and admixing an asphalt-rubber soap consisting essentially of water, a cationic water soluble emulsifying agent, a thickener, and aluminum sulfate to form a thixotropic emulsion capable of flowing as a liquid upon gentle agitation.

Abstract: A method of repairing pavements employing an elastomeric pavement repair composition comprised of paving grade asphalt and rubber. The asphalt is heated to an elevated temperature and the rubber is combined therewith. The resulting composition is mixed to form a hot jellied composition which is applied to cracked or distressed pavements to repair the same. The resulting composition can also be formed into a ready made elastomeric cold patch which is applied to cracked pavement surfaces after tacking of the surface.

Abstract: The paving material comprises the reaction product formed by heating a mixture of paving grade asphalt and a non-oil resistent rubber to a temperature of about 350.degree. F to about 500.degree. F. The improvement provides for a relatively low viscosity paving material by admixing a diluent with the asphalt-rubber mixture prior to the reaction whereby the viscosity of the paving material is unexpectedly reduced to about one-half as compared to the viscosity of the reaction product having the diluent admixed after the formation thereof. Variations in the viscosity of the paving material are unexpectedly minimized by precuring the asphalt-rubber-diluent mixture prior to reaction thereof.

Abstract: An elastomeric pavement repair composition for pavement failure and a method of preparation thereof comprising of paving grade asphalt and rubber. The asphalt is heated to an elevated temperature and the rubber is combined therewith. The resulting composition is mixed to form a hot jellied composition which can be applied to cracked or distressed pavements to repair the same.

Abstract: A method and material is provided for surfacing and repairing broken pavements with an elastomeric paving material comprised of the reaction product between a paving grade asphalt and a non-oil resistant rubber having petroleum malthenes admixed with said reaction product to improve the flexing properties at freezing temperatures of said paving material without any significant loss of viscosity at the high temperatures of application.

Abstract: A new method is provided for emulsifing a asphaltrubber pavement repair material into a stable thixotropic emulsion capable of flowing as a liquid upon gentle agitation. The method generally comprises the steps of heating asphalt and rubber to form a jellied reaction product, and admixing a asphalt-rubber soap consisting essentially of water, an anionic water soluble emulsifying agent, a thickner, and the halide of an alkali metal or an alkaline earth metal to form a thixotropic emulsion capable of flowing as a liquid upon gentle agitation.