The current invention concerns composition comprising bitumen, one or more plasticity modifying agent(s), and lignin, as well as methods and uses related to such compositions. In particular, compositions are disclosed with improved properties, such as mixing properties.

The present invention provides an asphalt composition obtained by blending an asphalt and an addition polymerization-type polymer, the addition polymerization-type polymer having a hydroxyl value of 10 mgKOH/g or more and 60 mgKOH/g or less and having a weight average molecular weight (M.sub.w) of 2,500 or more and 70,000 or less.

A coating system and related methods for an airfield surface or a roadway is described. The coating system may include a stable cationic emulsion for application to the airfield surface or the roadway. The stable cationic emulsion may include a) an asphalt blend comprising gilsonite, wherein the gilsonite is modified to possess a positive charge, b) one or more polymers, and c) one or more surfactants not including a cationic surfactant. The coating system may also include a fine aggregate material for application to the stable cationic emulsion applied to the airfield surface or the roadway.

The present invention relates to an asphalt mixture containing a new asphalt, the following polymer metal salt (P), and an asphalt-regenerated aggregate. The polymer metal salt (P) is a metal salt of a polymer having a structural unit derived from an aromatic monomer and having an acidic group.

An emulsion includes water; asphalt; an emulsifier in an amount of from about 0.5 to about 5 wt %, based on a total weight of the emulsion; a polyolefin having a weight average molecular weight (M.sub.w) of from about 500 to about 30,000 Da; and a copolymer having at least two repeating units wherein a first repeating unit is a styrene residue, and a second repeating unit is a butadiene residue.

A mixture formed from desired proportions of recycled asphalt shingle and recycled asphalt pavement is disclosed. The methods of molding the mixture into paving blocks, which exhibit properties of high compressive strength and low water absorption, are described. The paving blocks may be used to construct roads, parking lots, driveways, etc.

Provided are a non-volatile room-temperature modified asphalt binder, a non-volatile room-temperature recycled asphalt mixture containing the same, and a method for repairing potholes and cracks using the same. The non-volatile room temperature recycled asphalt mixture according to an example embodiment has improved fluidity, which prevents the occurrence of cracks in existing asphalt, and has the advantages of improved delamination and thermal stability.