Abstract: This invention provides a convenient method of forming and applying a thermoplastic material for roadway markings, comprising: obtaining individual components of a thermoplastic composite material suitable for roadway markings; mixing and heating the individual components to produce a fully compounded form of the thermoplastic composite material; solidifying and prilling the fully compounded form of the thermoplastic composite material to produce a plurality of thermoplastic prills; on a marking vehicle or mobile apparatus, introducing the thermoplastic prills to an on-board melter to produce a liquid phase of the thermoplastic prills; and applying the liquid phase of the thermoplastic prills to a roadway, thereby marking the roadway. Compositions and systems are also described. Surprisingly, prills melt in approximately half the time as the powder/granular form. Also, the melter can be operated at lower temperature, leading to less discoloration of material.

Abstract: A thermoset modified additive for asphalt mixture includes the following raw materials: resin, curing agent, promoter, flow agent, filler and additive, wherein the weight part proportions of the raw materials are: resin 35-70, curing agent 1-35, promoter 0-2.5, flow agent 0-6, filler 20-40 and additive 0-2. The asphalt mixture includes thermoset modified additive for asphalt mixture, matrix asphalt or modified asphalt and mineral aggregate, wherein the weight part proportions of the raw materials are: thermoset modified additive for asphalt mixture 1-5, matrix asphalt 2-8 and mineral aggregate 87-97. The thermoset modified additive for asphalt mixture is prepared by dry process modification technology; the prepared modified additive is powdery, has small particle size, and is easy to disperse in asphalt mixture; and the asphalt mixture prepared from the modified additive has simple operation process and low cost, and can be subjected to continuous production.

Abstract: A composite pavement structure comprises a wearing course layer and a base course layer disposed below the wearing course layer. The wearing course layer comprises aggregate, e.g. glass and rock, and an elastomeric composition. The elastomeric composition comprises the reaction product of an isocyanate component and an isocyanate-reactive component. The isocyanate component comprises a polymeric isocyanate, and optionally, an isocyanate-prepolymer. The isocyanate-reactive component comprises a hydrophobic polyol and a chain extender having at least two hydroxyl groups and a molecular weight of from about 62 to about 220. The chain extender is present in the isocyanate-reactive component in an amount of from about 1 to about 20 parts by weight based on 100 parts by weight of the isocyanate-reactive component. The base course layer comprises aggregate which is the same or different than the aggregate of the wearing course layer. Methods of forming the composite pavement structure are also disclosed.