A bituminous composition and a process for the preparation of bituminous mixes including at least one bitumen base, at least one compound of general formula Ar1-R.sub.1—Ar.sub.2 (I), and at least one compound of general formula R.sub.2—(NH).sub.nCONH—X—(NHCO).sub.p(NH).sub.n—R′.sub.2 (II). The composition is used as road binder, notably for the preparation of bituminous mixes.

A bituminous composition including at least: bitumen, a compound of general formula R1-(COOH)z (I), a compound of general formula R2-(NH)nCONH—X—(NHCO)p(NH)n-R3 (II), and a compound of general formula Ar1-R-Ar2 (III), in particular in solid form and divided at ambient temperature; and a method for producing a bituminous composition as defined above and to the use thereof as asphalt binder and/or in various industrial applications.

Bitumen granules including at least: bitumen, a compound of general formula R1-(COOH)z (I), a compound of general formula R2-(NH)nCONH—X—(NHCO)p(NH)n-R3 (II), and a compound of general formula Ar1-R-Ar2 (III); and a method for producing the bitumen granules and to the use thereof as asphalt binder.

Provided is a composition including at least one bitumen and at least one additive as defined herein. The composition provides emulsions of all types of bitumens, which can be used in the production of cold-poured mixes, having an improved internal strength and a rapid increase in cohesion.

An asphalt composition includes asphalt, a non-epoxidized oil chosen from flux oils, bio oils, recycled motor oils, liquid plasticizers, and combinations thereof, and a polyolefin. The polyolefin has a weight average molecular weight (Mw) of from about 1,000 to about 20,000 g/mol, an optional acid number of from about 10 to about 50 mg KOH/g, an optional saponification number of from about 10 to about 100 mg KOH/g, and a density of from about 0.92 to about 1 g/cm.sup.3. The asphalt composition has a performance grade of PG (52 to 88) and (−22 to −40), wherein (52 to 88) is an average seven day maximum pavement design temperature in degrees Celsius and represents deformation resistance and (−22 to −40) is an average one day minimum pavement design temperature in degrees Celsius and represents thermal cracking resistance, each as determined using AASHTO M320.

Various embodiments disclosed relate to asphalt emulsifiers. An emulsifier has the structure R.sup.1—C(O)-A-(CH.sub.2).sub.n—N(R.sup.2) (R.sup.3), or a salt thereof wherein the —N(R.sup.2)(R.sup.3) nitrogen is quaternized as —N.sup.+(R.sup.2)(R.sup.3)(R.sup.4), or an N-oxide thereof wherein the —N(R.sup.2) (R.sup.3) nitrogen is oxidized as —N.sup.+(R.sup.2)(R.sup.3)(O.sup.−). The variable A is —NH— or —O—. The variable R.sup.1 is chosen from (C.sub.4-C.sub.22)alkyl, substituted (C.sub.4-C.sub.22)alkyl, (C.sub.4-C.sub.22)alkenyl, and substituted (C.sub.4-C.sub.22)alkenyl. The variables R.sup.2 and R.sup.3 are each independently chosen from (C.sub.1-C.sub.10)alkyl and substituted (C.sub.1-C.sub.10)alkyl. The variable R.sup.4 is chosen from —H, (C.sub.1-C.sub.20)hydrocarbyl, and substituted (C.sub.1-C.sub.20)hydrocarbyl. The variable n is 1 to 10. Various embodiments include methods of making the emulsifier such as from a fatty acid source and an amine starting material, emulsions including the emulsifier and methods of making the same, and methods of using the emulsion including contacting asphalt or bitumen with the emulsion.

A void filling asphalt emulsion and a method of using the void filling asphalt emulsion to fill voids below the surface of an asphalt pavement. The void filling emulsion is prepared by forming a base asphalt emulsion having about 45 to 75 wt. % of an asphalt content, and combining the base asphalt emulsion with a surface tension reducing solution to produce a void filling asphalt emulsion that has about 25 to 50 wt. % of an asphalt content. When applied to an asphalt pavement the void filling emulsion penetrates into the asphalt pavement and fills voids in the asphalt pavement. The void filling emulation further being water resistant so as not to be washed off a pavement surface by water after being applied to the pavement.

Disclosed are asphalt and asphalt binders and methods for making such compositions with sterols. The sterols improve various rheological properties. Also disclosed are methods of determining the changes or improvements of various rheoloical properties.

Pavement aging can be reduced by applying to an asphalt-containing pavement a topcoat layer or a surface treatment containing asphalt binder emulsion with sterols.

Asphalt binders and bituminous compositions comprising additives such as naphthenic acid esters. In certain embodiments the ester compounds may be useful as rheology modifiers for use in bituminous binders in road paving applications.