Composition for sealing joints in road surfaces and subsurfaces

Abstract

A composition used for sealing and strengthening the joints in an asphalt road surface and subsurface to prolong the useful life of the road utilizes a polymer modified cationic maltene emulsion containing polymer modified maltene oils and resins, and surfactants/and wetting agents. The emulsion is applied to the longitudinal joints and other joints in the asphalt pavement surface. The emulsion reduces voids in the asphalt pavement and chemically improves the asphalt binder properties, thereby altering the modulus of elasticity of the asphalt binder so that the resistance of the pavement to tension stress is increased, and the water absorption of the pavement is reduced.

1 . A composition for sealing joints in an asphalt pavement surface comprising:
 an emulsion formed from selected oils and resins extracted from a crude oil source; wherein   a base oil of said emulsion is a petroleum resin, and said base resin is mixed with water, at least one emulsifier, and a polymer compound, such that   said emulsion comprises 58%-60% by weight petroleum resin, 35.75% by weight water, 2% by weight polymer compound, and 2.25% by weight emulsifier.   
   
   
       2 . The composition as defined in  claim 1  wherein:
 components of said emulsion are mixed in a colloid mill.   
   
   
       3 . The composition as defined in  claim 2  wherein:
 said colloid mill provides for a particle size setting of 0.015-0.020.   
   
   
       4 . The composition as defined in  claim 1  wherein:
 said base oil is heated to 200°-208° F., and said water is heated to 120°-150° F.   
   
   
       5 . The composition as defined in  claim 1  wherein:
 said emulsion further comprises a selected polymer in the amount of 2% by volume.   
   
   
       6 . The composition as defined in  claim 5  wherein:
 said polymer is styrene butadiene or an unvulcanized synthetic virgin rubber.   
   
   
       7 . The composition as defined in  claim 1  wherein:
 a maltene distribution ratio of said emulsion is between 0.2 and 0.6