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.

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.

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 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.

Granules of material usable as a road binder or sealing binder, including a core and a coating layer, where: the core is made of a first composition including at least one material chosen from: a bitumen base, pitch, and clear binder, and the coating layer is made of a second composition including: at least one viscosifying compound, at least one first anticaking agent selected from alkali and alkaline-earth metal silicates, and at least one second anti-caking agent distinct from the silicates. Also, a method for producing granules of material that can be used as a road binder or sealing binder, and the use thereof as a road binder, in particular for the production of coated materials. Also, a method for producing coated materials from granules of material that can be used as a road binder or as a sealing binder and a method for transporting and/or storing and/or handling granules.

Granules of material usable as a road binder or sealing binder, including a core and a coating layer, where: the core is made of a first composition including at least one material chosen from: a bitumen base, pitch, and clear binder, and the coating layer is made of a second composition including: at least one viscosifying compound, at least one first anticaking agent selected from alkali and alkaline-earth metal silicates, and at least one second anti-caking agent distinct from the silicates. Also, a method for producing granules of material that can be used as a road binder or sealing binder, and the use thereof as a road binder, in particular for the production of coated materials. Also, a method for producing coated materials from granules of material that can be used as a road binder or as a sealing binder and a method for transporting and/or storing and/or handling granules.

A composition including at least: a binder base chosen from: a bitumen base, a pitch base, a clear binder, or a mixture of one or more of these binder bases, an acid compound of general formula (I): R—(COOH).sub.z (I). an amide compound of general formula (II): R′—(NH).sub.nCONH—(X).sub.m—(NHCO).sub.p(NH).sub.n—R″ (II) the compounds (I) and (II) being present in a weight ratio ranging from 10:1 to 1:16, for preparing a mastic asphalt composition. Mastic asphalt compositions and surfacings are thus obtained.