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.

A bituminous mastic includes:—from 0.5% to 25% by mass of at least one hydrocarbon oil, the total content of paraffinic compounds of which, measured according to the ASTM d2140 method, is greater than or equal to 50% by mass, and preferably greater than or equal to 60% by mass, relative to the total mass of the oil,—from 15% to 60% by mass of bitumen,—from 20% to 60% by mass of fillers, and—at most 14%, by mass of at least one polymer, preferably chosen from elastomers, relative to the total mass of bituminous mastic. A method for preparing such a bituminous mastic and to the uses thereof, in particular in certain road and/or industrial applications.

Cold-in-place asphalt recycling is disclosed. A foamed asphalt may be produced by injecting water and optionally compressed air into a hot asphalt stream. A lubricating surfactant may be added to the hot asphalt stream to improve performance. The foamed asphalt may be mixed with reclaimed material to provide a uniformly coated paving material that can compacted to a desired density.

Cold-in-place asphalt recycling is disclosed. A foamed asphalt may be produced by injecting water and optionally compressed air into a hot asphalt stream. A lubricating surfactant may be added to the hot asphalt stream to improve performance. The foamed asphalt may be mixed with reclaimed material to provide a uniformly coated paving material that can compacted to a desired density.

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.

The present invention provides a method for preparing a hot-mixed asphalt mixture, and relates to the technical field of road engineering. In the present invention, asphalt and aggregates are preheated separately, where the aggregates include coarse aggregates and fine aggregates; the coarse aggregates, part of the fine aggregates and asphalt that are preheated are subjected to a first mixing to obtain a first mixture; the remaining fine aggregates are added to the first mixture for a second mixing to obtain a second mixture; and a mineral powder is added to the second mixture for a third mixing, and discharging is conducted to obtain a hot-mixed asphalt mixture.

A pavement composition includes a recycled hot mix asphalt (HMA) sheet mix composition including more than 50% and up to 100% recycled fines mixed with a rejuvenating agent. The recycled fines of the HMA sheet mix are separated from a reclaimed asphalt pavement (RAP) composition and substantially all of the recycled fines are capable of passing through a sieve having an opening size of ⅜ inch (9.5 mm). Pavement systems include an existing pavement layer and a thin-lift overlay made of the recycled HMA sheet mix on the existing pavement layer. Pavement systems also include a three-layer system including a leveling course layer, an interlayer, and a surface course layer in which the leveling course layer and/or the surface course layer include a recycled HMA sheet mix composition.

A superstructure for a traffic surface is provided, the superstructure including a base layer of a mastic asphalt, and an intermediate layer of a porous asphalt arranged on the base layer, wherein the base layer seals a lower side of the intermediate layer at least in a liquid-tight manner. The superstructure comprises a top layer of a mastic asphalt arranged on the intermediate layer, wherein the top layer seals an upper side of the intermediate layer at least in a liquid-tight manner. The superstructure includes at least one sealing wall of a mastic asphalt arranged on at least one side surface of the intermediate layer, wherein the at least one sealing wall connects the base layer to the top layer and seals the at least one side surface in at least a liquid-tight manner. A method for manufacturing the superstructure is also provided.

A permeable pavement system including a permeable pavement composition and a related method are provided. The permeable pavement system includes a first layer of a permeable pavement composition including a quantity of a first permeable pavement material and a quantity of cured carbon fiber composite material (CCFCM) incorporated therewith, the first layer defining a first surface; and a second layer of a second permeable pavement material deposited over a substantial entirety of and covering the first surface of the first layer of the permeable pavement composition, wherein the first layer interfaces with the second layer to at least strengthen the permeable pavement system.

Provided is a method for evaluating and utilizing sonnenbrand basalt aggregate, including steps as follows: mixing a basalt aggregate defined as sonnenbrand basalt into an asphalt mixture; carrying out thermal aging experiments at different temperatures and durations to obtain a theoretical trigger time t.sub.i for the sonnenbrand phenomenon under a thermal aging temperature T.sub.i; further calculating to obtain a theoretical thermal aging factor AF.sub.0 for the sonnenbrand phenomenon; statistically calculating a thermal aging factor AF for an actual construction to evaluate a performance of the basalt aggregate, if AF<AF.sub.0, the construction may be carried out normally, if AF≥AF.sub.0, then shortening the transportation and waiting duration and/or lowering the factory temperature of the asphalt mix so that the thermal aging factor AF<AF.sub.0 during actual construction.