The present invention relates to a binder composition comprising a bituminous binder and at least one rejuvenating agent. The present invention further relates to a method for evaluating the efficiency of a rejuvenating agent in a binder composition.

The invention relates to a process for preparing foamed polymer-modified bitumen compositions and to the use thereof for the production of asphalt. The invention also relates to foamed polymer-modified bitumen compositions obtainable by this process. Furthermore, the invention relates to a process for producing an asphalt composition and to the use thereof in road applications. The process for the preparation of the foamed polymer-modified bitumen composition comprises the following steps: i) Heating and pressurizing a bitumen to obtain a hot flowing bitumen stream, ii) Injecting under pressure an aqueous polymer dispersion into the hot flowing bitumen stream obtained in step i), to obtain a pressurized flowing mixed stream of the bitumen and the aqueous polymer dispersion; iii) Expanding the flowing mixed stream, in particular to atmospheric pressure, such that the water contained in the aqueous polymer dispersion vaporizes and foams the mixed stream to obtain a foamed polymer-modified bitumen.

The present invention relates to polymer-modified bitumen, to a process for production thereof and to the use thereof for asphalt.

The present disclosure provides asphalt modified red mud for porous pavement material and an application thereof. The porous asphalt pavement material includes asphalt, red mud and aggregate; the mass ratio of asphalt to red mud is 1:(0.10-0.15), the mass ratio of the total mass of asphalt and red mud to aggregate is (0.08-0.12):1. With regard to the asphalt modified with red mud for porous pavement material provided in the present disclosure, asphalt is modified with red mud, and aggregate is added to synergize with red mud so as to improve the purification properties and mechanical properties of the porous asphalt pavement material efficiently. In the embodiments of the present disclosure, the purification rate of suspended matter by the asphalt modified with red mud for porous pavement material reaches 54.9-58.6%, and the purification rate of heavy metals (iron and lead) reaches 34.3-46.1%.

A binder composition includes at least: a binder base selected among an oil, a bitumen base, a pitch, a clear binder, or mixtures thereof; 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 of formula (I) and formula (II) being provided in a weight ratio of 10:1 to 1:16. A process for manufacturing bituminous mixes including at least the binder composition and aggregates, includes at least the steps of: heating the aggregates to a temperature ranging from 100° C. to 180° C., mixing the aggregates with the binder composition, and obtaining bituminous mixes. A method for transporting and/or storing and/or handling the binder composition includes transporting and/or storing and/or handling the binder composition in the form of blocks or pellets.

An asphalt composition comprising aggregates and a binder material, wherein the binder material comprises humins, which humins comprise carbonaceous water-insoluble by-products of the dehydration of carbohydrates and/or 5-hydroxymethylfurfural and/or ethers or esters of 5-hydroxymethylfurfural. The invention also provides a binder material for use in asphalt compositions comprising from 1 to 95% wt, preferably from 5 to 60% wt of such humins, based on the weight of the binder material. The invention further provides for the use of such humins in the manufacture of binder material for asphalt compositions and the use of such humins as binder material in asphalt compositions.

The present invention relates to novel rubber-modified bitumen, to improved processes for producing rubber-modified bitumen using vulcanized rubber and to the use thereof in asphalt.

A method and an apparatus for processing and recovering bitumen (42) and aggregate (41) from asphalt (40), in which: a) the asphalt (40) is mechanically comminuted; b) the comminuted asphalt is introduced into an evacuated or evacuatable processing chamber (1); c) the processing chamber (1) is evacuated by adjusting the pressure in the processing chamber (1) to a pressure lower than ambient pressure, preferably 200 mbar or lower; d) the processing chamber (1) is then charged at least once with a liquid organic solvent; e) the liquid organic solvent is then extracted from the processing chamber (1); and then f1) the organic solvent is fed into the evacuated processing chamber (1) in the vapor phase at the reduced pressure, at a temperature at or above the flash point of the organic solvent; and/or f2) liquid organic solvent is fed into the treatment chamber (1).

Foamed asphalt compositions, recycled asphalt compositions, asphalt pavement, and methods of forming asphalt pavement using the foamed asphalt compositions are provided herein. An exemplary foamed asphalt composition is in a cellular matrix form and includes a base asphalt component and oxidized high density polyethylene. An exemplary asphalt pavement includes a recycled asphalt layer that includes the foamed asphalt composition and a recycled asphalt component. An exemplary method of forming asphalt pavement includes combining a base asphalt component and an oxidized high density polyethylene to form an asphalt mixture. The asphalt mixture is foamed using water and compressed air to form a foamed asphalt composition. The foamed asphalt composition and a recycled asphalt component are combined to form a recycled asphalt composition. A recycled asphalt layer is formed with the recycled asphalt composition.

The present invention relates to an asphalt composition comprising asphalt or an asphalt mixture and to a silicon carbide-containing binder that can be heated by means of microwaves. The silicon carbide is present in the binder in particle form, the equivalent diameter of silicon carbide particles contained in the binder is less than 60 μm. The invention also relates to a method for producing and/or renovating road surfaces or asphalt surfaces comprising at least one asphalt surface layer.