Abstract: Asphalt binder compositions are formed by combining asphalt with a reclaimed or re-refined oil. The boiling point of the oil may be greater than its flash point. The asphalt may be polymer modified or non-polymer modified. These asphalt binder compositions may be combined with aggregate and/or other matter (e.g., rubber particles) to form cold patch compositions suitable for various applications such as patching potholes, cracks or other defects in roads, driveways, roofs or other paved surfaces.

Abstract: Asphalt compositions and products in which the binder comprises tall oil materials possibly previously subjected to distillation, and/or oxidation, and/or combined with a polymer, the tall oil materials having a softening point in the range of 75 F to 400 F, a Needle Penetration value (0.1 mm) at 25 C of at least 1, a Rotational Viscosity at 275 F in the range of 650 cps to 8,000 cps, and a water solubility of less than 10 percent.

Abstract: The invention relates to a bituminous coating comprising a material of low bulk density ranging between 0.01 and 0.3 t/m3 in sufficient quantity to improve the acoustic performance thereof.

Abstract: The invention provides a sulphur pellet comprising at least one H2S-suppressant, comprising in the range of from 60 to 100 wt % elemental sulphur, based on the total weight of the pellet. The invention further provides a process for the manufacture of sulphur pellets comprising at least one H2S-suppressant, comprising the steps of: (a) mixing elemental sulphur, one or more H2S-suppressants and optionally a filler in a mixing unit to obtain a mixture; (b) shaping and/or palletizing the mixture obtained in step (a) in a palletizing unit to obtain H2S-suppressant-comprising sulphur pellets. The invention further provides a process for the manufacture of a sulphur-comprising asphalt paving mixture comprising the steps of: (i) preheating bitumen at a temperature of between 140 and 180° C.; (ii) preheating aggregate at a temperature of between 140 and 180° C.

Abstract: Described is the use, for preparing or treating bituminous compositions, of at least one compound selected among: esters of glycolic, lactic and gluconic acids, methylic, ethylic and isobutylic esters of glutaric, succinic and adipic acids, and ethers or esters of a product resulting from internal dehydration of a sugar, preferably a hydrogenated sugar. Also described is a method for preparing or treating such compositions and the resulting compositions.

Abstract: This invention relates to bituminous compositions and methods of producing the same. More particularly, the invention relates to the production of bituminous compositions formulated with performance-graded bitumen-containing solvent-free bitumen emulsions which exhibit controllable, temperature-dependent interfacial rheology. When employed in paving applications, these bituminous compositions develop adhesive strength and load-bearing strength properties at rates comparable to traditional hot mix paving compositions and at rates faster than traditional cold mix paving compositions.

Abstract: Bituminous asphalt binder materials which are modified by the addition of crumb rubber or ground tire rubber and a cross-linking agent are described. In addition, methods are provided for producing a modified asphalt binder containing crumb rubber or ground tire rubber and a cross-linking agent. The modified asphalt binders comprise neat asphalt, crumb rubber, one or more acids and a cross-linking agent. Optionally, the modified asphalt binder may include one or more polymer additives. The crumb rubber may be obtained from recycled truck and/or automobile tires. The addition of crumb rubber in asphalt binders can improve the consistency and properties of the asphalt binders at high and low temperatures. In particular, the modified asphalt binders of the present invention exhibit improved elastic behavior, resulting in improved performance of roads or other surfaces paved using the modified asphalt binder.

Abstract: A method of producing a roofing shingle coating asphalt from a non-coating grade asphalt feedstock includes the following steps. The non-coating grade asphalt feedstock is partially blown to lower its penetration to a first penetration that is within or close to a target penetration range of the coating asphalt, and to raise its softening point to a first softening point that is lower than a target softening point range of the coating asphalt. Then a wax is added to the partially blown non-coating grade asphalt to further raise its softening point to a second softening point that is within the target softening point range to produce the coating asphalt.

Abstract: In a process of producing a roofing shingle coating asphalt from a low flashpoint asphalt feedstock, an asphalt feedstock which has a low flashpoint of from 490° F. (254° C.) to 540° F. (282° C.) is partially blown, and wax is added to the asphalt feedstock. The process produces a coating asphalt having a low melt viscosity of from 50 cps to 150 cps at 400° F. (204° C.), a softening point of from 190° F. (88° C.) to 235° F. (113° C.) and a penetration of at least 15 dmm at 77° F. (25° C.). In another embodiment, the process produces a roofing shingle coating asphalt having good weatherability from a poor weathering asphalt feedstock. In a further embodiment, the process produces roofing shingles including a filled coating containing a poor tear filler without sacrificing the tear strength of the shingles.

Abstract: An improved method of making hot mix asphalt, without adding virgin asphalt concrete oil, includes several steps: adding gravel to a container; and heating and rotating the gravel in the container to a suitable temperature for creating the hot asphalt mix. While heated gravel rotates in the container, processed shingles, having a predetermined %/w of AC oil (20%/w on average), are added to a mixing auger along with at least 1 to 2 parts of rejuvenating oil per 100 parts of the processed shingles. The processed shingles and rejuvenating oil are mixed together for about 10 to 20 seconds in the mixing auger creating a slurry of rejuvenated shingles. The slurry of rejuvenated shingles from the mixer auger are then released into the heated and rotating gravel in the container, forming hot mix asphalt with a total oil content of between about 4%/w to 8%/w of the hot mix asphalt, advantageously without adding virgin asphalt concrete oil.

Abstract: The invention concerns a method for preparing a bitumen base, including the following essential steps: a) introducing a bitumen in a container equipped with mixing means, and bringing the bitumen to a temperature of 120° C. to 300° C.; b) introducing at least one chemical blowing additive into the container, and mixing, said chemical blowing additive being of general formula Ar1-R—Ar2 (I) wherein Ar1 and Ar2 independently of each other represent a benzene ring or a system of condensed aromatic rings of 6 to 20 carbon atoms, substituted by at least one hydroxyl group, and R represents an optionally substituted divalent radical, whereof the main chain comprises 6 to 20 carbon atoms and at least one amide and/or ester group. The invention also concerns a bitumen base obtained by implementing said method, as well as the use of such bitumen bases in road surfacing and industrial applications.

Abstract: Methods and systems for efficiently manufacturing modified asphalt materials include agitating a base asphalt at a high shear rate using an in-line mixer equipped with a rotor-stator mixing tool while simultaneously exposing the asphalt to oxygen by blowing an oxygen-containing gas at a high gas flow rate through openings in the rotor-stator mixing tool and heating the asphalt at an elevated temperature.

Abstract: The present invention involves the recycling of asphalt based roofing materials by comminuting the roofing material and subsequently separating a rock component from an asphalt component of the roofing material. The asphaltic component is separated into a feed stream having a mesh size of less than about 50 mesh while the rock component is separated into a feed stream having rocks in the size of 10 mesh or larger. A portion of the comminuted material may be recycled back for additional comminuting. The separated asphaltic component is placed in contact with the solvent to dissolve the asphalt in the asphaltic component providing a mixture of filler, fiber and dissolved asphalt. The liquid may then be applied to a surface of a wall to form a substantially continuous solidified film on the wall to provide waterproofing and an air barrier.

Abstract: Disclosed is a paving resin composition which comprises a thermoplastic resin in small lumps, containing 30 to 70% by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 20 to 45% by weight and a melting temperature of 40 to 100° C. The paving resin composition of the present invention is melted within a short time, excellent in wettability and adhesion property to aggregates, and capable of providing a paved face excellent in durability free from problems of deformation during summer and cracking during winter. Moreover, the paving resin composition of the present invention can be thrown directly to a mixer without being passed through a measurement apparatus and accordingly, washing work of the measurement apparatus or pipes is made unnecessary and the workability is thus significantly increased.

Abstract: A process of producing a roofing shingle coating asphalt from an asphalt feedstock includes the following steps. Wax and blowing catalyst are added to the asphalt feedstock. Then the asphalt feedstock is blown to produce the coating asphalt. The coating asphalt has a softening point within a range of from about 190° F. (88° C.) to about 235° F. (113° C.) and has a penetration of at least about 15 dmm at 77° F. (25° C.).

Abstract: The invention presented here deals with getting one of the raw materials of a new refractory binder system, the modified coal-tar pitch starting with heating the coal-tar, according to the specific distillation curve, later reaching a final distillation temperature of around 470° C., resulting in getting a final compound with a concentration of benzo(a)pyrene in the order of 600 ppm, together with the mixture of other raw materials for the composition of the binder system, such as anthracene oil (AO), soybean oil, linseed oil, castor oil, diesel oil, rapeseed oil, biodiesel, biopitch (Vegetable tar), paraffin, dextrin (corn starch), stearine, paraffin, vegetable waxes (cupuassu seed, shea nut, murumuru palm waxes), phenolic resins, furane resins, urethanes, epoxy, vinyl chloride, polyethylene and ethyl polyterephthalate.

Abstract: A two-component composition is disclosed and a method of applying the composition to a surface to form thereon a hardened compact coating, wherein each component remains separate until conveyed to a mixer for forming therein, a mixture of the two components, allowing seamless production of a liquid foil on the surface, and that hardens reactively to form a hardened compact coating, which comprises: (i) a first component which comprises: a 60-70% mixture of bitumen and water in a quantity of 50 to 100 partial mass %; and (ii) a second component which comprises: 20 to 50 partial mass % filling material, and 40 to 80 partial mass % softening, non-volatile oil, and wherein the first component and the second component are present in a ratio of 100:10 up to 50 mass %.

Abstract: A method is given for reducing fluid loss in downhole operations such as drilling and completion. A composition containing a fusing solid is injected into the fluid loss flow path; the fusing solid fuses at formation temperature when the injection pressure is released and the formation matrix surfaces forming the flow path close on the composition. The fusing solid is gilsonite, or a similar material, or resin coated particles. The composition may optionally contain one or more of fibers, flakes, an activator, and a dispersant.

Abstract: The invention relates to carbon aerogels with particle sizes less than 1 ?m, The carbon aerogels are prepared by (A) reating a mono- and/or polyhydroxybenzene, an aldehyde and a catalyst in a reactor at a reaction temperature T in the range from 75-200° C. at a pressure of 80-2400 kPa, (B) then spraying the reaction mixture from process step (A) into an acid, to drying the resulting product from process step (B) and (D) carbonizing it. The carbon aerogels according to the invention can be used as filler, reinforcing filler, UV stabilizer, electrode material, sound absorbents, thermal insulating material, catalyst, catalyst support, conductivity additive, absorbent for as and/or liquid preparation or pigment.

Abstract: An asphalt binder includes asphalt and an asphalt binder modifier, which includes bio-oil. The asphalt binder can include a carboxyl additive. The asphalt can optionally include polymer-modified asphalt. An asphalt material includes mineral aggregate, an asphalt material binder including asphalt, and an asphalt binder modifier including bio-oil. A method for making the asphalt binder is disclosed. The asphalt material includes asphalt pavement and roofing shingles. The asphalt binder can be emulsified with water and a surfactant for use as a weatherproofing sealant or as an adhesive.

Abstract: A process for preparing bitumen bale for clean, safe, eco-friendly and cost-effective packing, storing and transporting of viscous bitumen products and the products thereof is delineated in the present disclosure. The bituminous products are introduced into a baling process line. The cooling efficiency is enhanced by utilizing the process. Viscous bitumen products are made in the form of spiral bitumen bale. “BituBale Film capsules” are produced by the process. Polymer additives are added to bitumen/asphalt, by the process, to enhance the durability and to get good gripping surfaces. The process enhances the homogenous nature of the products. The process for preparing bitumen bale for clean, safe, eco-friendly and cost-effective packing, storing and transporting of viscous bitumen products is a clean, safe, environmentally friendly and cost effective method.

Abstract: A system for determining parameters and compatibility of a substance such as an asphalt or other petroleum substance uses titration to highly accurately determine one or more flocculation occurrences and is especially applicable to the determination or use of Heithaus parameters and optimal mixing of various asphalt stocks. In a preferred embodiment, automated titration in an oxygen gas exclusive system and further using spectrophotometric analysis (2-8) of solution turbidity is presented. A reversible titration technique enabling in-situ titration measurement of various solution concentrations is also presented.

Abstract: A roofing shingle has low density granules adhered to at least a headlap region on a front surface of the roof shingle.

Abstract: A process for the preparation of bitumen foam, wherein a gas is dispersed into the bitumen with a temperature of less than 200° C. and with a viscosity van 100-10.000 mPas measured at the temperature using EN 12596, wherein the process includes bringing the gas tangentially into contact with a bitumen stream, to obtain a bitumen foam that is not dehydrogenated, oxidised or otherwise chemically modified, and in which at least 10 vol % gas is distributed substantially homogeneously. This process can be applied simply and safely, and results in bitumen foam without additions being necessary for this. In this way bitumen can be processed at lower temperatures, even below 100° C., to asphalt or wearing course.

Abstract: The present invention relates to a bitumen or asphalt formulation for the pavement of road surfaces, said formulation comprising a mixture of bitumen and aggregates, and an additive package evenly distributed therein, said additive package comprising from about i) 10 to 60% by weight of an amine or modified amine surfactant, ii) from about 20 to 90% of an asphalt rheology modifying component.

Abstract: An asphalt mix comprising a pine extract, the asphalt mix having low viscosity at ambient temperatures, and workable at ambient temperatures. The asphalt mix comprises asphalt cement, biodiesel, pine extract and an anti-stripping agent. The asphalt mix is an environmentally safe and “green” product. It comprises recycled asphalt product. The asphalt mix eliminates petroleum solvents beyond trace amounts used to denature biodiesel. The asphalt mix is used for patching at ambient temperatures. Safety precautions for heat and toxicity are not necessary for use. The asphalt mix comprises only solvents that are biodegradable. The biodegradable solvents are pine extract and biodiesel.

Abstract: Embodiments of the invention provide an apparatus or process for devolatilization of flowable materials (such as molten polymers with entrained or dissolved solvent or unreacted monomers or comonomers) using a plate heater having heating channels, the design or operation of which heating channels maintains the flowable material above its bubble point pressure during passage through a larger first zone and then induces flashing in, or downstream of, a smaller second zone of the heating channel. The apparatus enables a higher throughput per heating channel while achieving equivalent or better devolatilization, as compared to current devolatilization apparatus.

Abstract: The invention relates to a method for manufacturing carbon-bonded refractory products from refractory granulations and organic binder agents, wherein a powdery, graphitable coal-tar pitch with a benzo[a]pyrene content less than 500 mg/kg and a coking value of at least about 80% by weight according to DIN 51905 and a graphitable binder agent liquid at room temperature, with a coking value of at least about 15% by weight and a benzo[a]pyrene content less than 500 ppm according to DIN 51905, are used as organic binder agent, mixed with the remaining constituents, transferred to a mould body, then heat treated at a temperature of 150 to about 400° C.

Abstract: The invention relates to a bituminous composition that comprises a major portion of at least one bitumen and a minor portion of at least one chemical additive, said additive being an organogelling agent that generates a network of hydrogen bonds between the organogelling molecules constituting the same, and trapping the bitumen phase up to a maximum temperature TR of between 40 and 120° C. The invention also relates to the use of these bitumen compositions in the field of road applications, particularly in the production of road binders, as well as in industrial applications. The invention also relates to a method for preparing these bituminous compositions.

Abstract: A combination of antioxidants and method of incorporating the antioxidants into an asphalt binder to make a modified asphalt binder are described. The antioxidants comprise a thioester and an aldehyde. The aldehyde and thioester, in a ratio between about 1:100 and about 100:1, are added to an asphalt binder. An acidic catalyst is also added in a concentration between about 0.1 wt % and about 18 wt % of the asphalt binder. The antioxidants, asphalt binder, and catalyst are mixed at a temperature between about 85° C. and about 135° C. for a time between about 30 minutes and about 6 hours. The antioxidants are capable of improving the performance grade of the asphalt binder. The modified asphalt binder possesses superior resistance to oxidative age hardening compared to other modified asphalt binder compositions that incorporate various antioxidants.

Abstract: A building or construction material comprises a fluorinated polymer system. The fluorinated polymer system is heat weldable and waterproofing, which shows improved adhesion properties and has a wide range of applications in building and construction industries.

Abstract: A method of recycling asphalt roofing material is provided. The asphalt roofing material is delivered into a treatment chamber of a processor. A heat source is provided to the treatment chamber. Heat energy is transferred from the heat source to the asphalt roofing material to produce a heated product, and the heated product is removed from the treatment chamber.

Abstract: The present invention is directed to an air-blown roofing asphalt modified with polyphosphoric acid and roofing products made with the polyphosphoric acid-modified, air-blown asphalt.

Abstract: Additives may be used to lower the set up point for bitumen thereby allowing it to be transported from place to place more easily. Additives useful for lowering the set up point of bitumen include alkylphenol formaldehyde resins and oxyalkylated alkylphenol formaldehyde resins; amines and esters; solvents; and combinations thereof.

Abstract: Methods and systems for efficiently manufacturing modified asphalt materials include agitating a base asphalt at a high shear rate using an in-line mixer equipped with a rotor-stator mixing tool while simultaneously exposing the asphalt to oxygen by blowing an oxygen-containing gas at a high gas flow rate through openings in the rotor-stator mixing tool and heating the asphalt at an elevated temperature.

Abstract: A binder pitch material includes a petroleum pitch and asphalt fraction obtained from petroleum crude oil and has a significantly lower polycyclic aromatic hydrocarbon composition than a coal tar pitch having a like softening point. The pitch material is useful as a binder material for various applications such as clay pigeons.

Abstract: Asphaltic compositions that are made from recycled waste building materials may include recycled plastics, provide reduced environmental impact and may be formed to meet state standards for aggregates used in asphaltic cement and other paving and construction standards.

Abstract: The asphalt roofing material is delivered into a treatment chamber of a processor. Hot oil is passed through a jacket surrounding the treatment chamber. Heated asphalt forms a hot solid and/or a liquefied slurry. The hot solid and/or the liquefied slurry is then removed from the treatment chamber. The asphalt roofing material in the treatment chamber can be agitated to promote mixing. The asphalt is heated to a temperature in the range from 200 degrees Fahrenheit to 650 degrees Fahrenheit within the treatment chamber. The solid and/or liquefied slurry is milled after it has been removed from the treatment chamber. The solid and/or the liquefied slurry is cooled after it exits the treatment chamber, preferably to a temperature in the range of approximately 90 degrees Fahrenheit to 110 degrees Fahrenheit. The hot solid and/or the liquefied slurry is passed through a hammer mill after the hot solid and/or the liquefied slurry exits the treatment chamber to reduce the particle size of the solid particles.

Abstract: Bituminous paving mixtures containing lubricating agents or additives may be prepared at hot mix temperatures and cooled, paved and compacted at temperatures 10-55 Celsius degrees lower than the hot mix temperatures. The increased temperature range between the hot mix temperatures and the paving and compacting temperatures is facilitated by the improved compacting properties of the paving mixture when it includes the lubricating agents or additives.

Abstract: The present invention is directed to the upgrading of heavy petroleum oils of high viscosity and low API gravity that are typically not suitable for pipelining without the use of diluents. It utilizes a short residence-time pyrolytic reactor operating under conditions that result in a rapid pyrolytic distillation with coke formation. Both physical and chemical changes taking place lead to an overall molecular weight reduction in the liquid product and rejection of certain components with the byproduct coke. The liquid product is upgraded primarily because of its substantially reduced viscosity, increased API gravity, and the content of middle and light distillate fractions. While maximizing the overall liquid yield, the improvements in viscosity and API gravity can render the liquid product suitable for pipelining without the use of diluents.

Abstract: The present invention is directed to the upgrading of heavy petroleum oils of high viscosity and low API gravity that are typically not suitable for pipelining without the use of diluents. It utilizes a short residence-time pyrolytic reactor operating under conditions that result in a rapid pyrolytic distillation with coke formation. Both physical and chemical changes taking place lead to an overall molecular weight reduction in the liquid product and rejection of certain components with the byproduct coke. The liquid product is upgraded primarily because of its substantially reduced viscosity, increased API gravity, and the content of middle and light distillate fractions. While maximizing the overall liquid yield, the improvements in viscosity and API gravity can render the liquid product suitable for pipelining without the use of diluents.

Abstract: This invention relates to a process for producing a hot, cold or lukewarm ready-to-use bituminous mix, characterized in that it includes the following successive steps: (a) preparing a hot, cold or lukewarm master mix or bituminous mix by mixing some or all of the bituminous binder proportioned in liquid form with some or all of the aggregates, and optionally with some or all of the fines and/or some or all of the aggregate mix and/or some or all of the various additives so as to obtain a mixture in which the aggregates and any fines and aggregate mix are coated by the bitumen, (b) storing of the master mix or of the bituminous mix obtained in step (a), (c) mixing the master mix or the bituminous mix stored in step (b) with one or more additional formulation components so as to obtain a hot, cold or lukewarm ready-to-use bituminous mix, in which step (c) is implemented at the mix production site if the additional formulation component is a thinning agent.

Abstract: Disclosed herein is a composition for solidifying soil and industrial waste. The solidifying composition contains 16-24 wt % of straight asphalt, 0.06-0.10 wt % of an emulsifier for asphalt, 0.8-1.2 wt % of light oil, heavy oil or a mixture thereof, 0.01-0.03 wt % of calcium chloride, 0.8-1.2 wt % of lignin, 0.7-1.3 wt % of an acrylic emulsion-based asphalt modifier, 0.13-0.21 wt % of sodium hydroxide, 0.22-0.34 wt % of oleic acid, and the balance of water. A solidified material formed using this solidifying composition has increased density, strength and elasticity, improved durability and a short curing time. Furthermore, the solidifying composition enables soil and industrial waste to be recycled as a substitute for stone materials, such that it allows material sources to be readily secured in public or construction work fields, leading to a reduction in construction cost, and can also contribute to the preservation of the natural environment.

Abstract: Recycled tire rubber, either in the presence or the absence of carbonaceous waste solids such as those from petroleum refinery operations, is first subjected to a heat treatment to release volatile materials and then combined with a liquid asphalt composition to achieve an asphalt mastic that is storage stable and of uniform consistency.

Abstract: To provide a carbon fiber reinforcement having excellent thermal conductivity and mechanical properties which is manufactured by mixing together two different types of pitch-based carbon short fibers having a ratio of the degree of filament diameter distribution to average fiber diameter of 0.05 to 0.2 and a fiber length of 20 to 6,000 ?m which differ from each other in average fiber diameter or by mixing one of them with a pitch-based carbon fiber web to improve dispersibility into a matrix resin or increase the dispersion ratio of the pitch-based carbon short fibers.

Abstract: The present invention provides a functionally dry warm mix asphalt binder composition modified with lubricating agents or additives that can be mixed with aggregate and compacted at temperatures substantially below asphalt binder compositions that do not contain the disclosed lubricating additives.

Abstract: A design method for making a bituminous mixture that is used to form a vapor-permeable layer of pavement is provided. This design procedure includes preparing one or more bituminous mixture test specimens, measuring the performance of these specimens, and selecting a desirable bituminous mixture for paving that is vapor-permeable based on the performance of the specimens. Another aspect of the present invention is the selected bituminous mixture, which includes aggregate and a bituminous binder. The aggregate should be selected such that no more than about 5% by mass of the aggregate and preferably no more than about 3.5% by mass of the aggregate is able to pass through a 75 ?m sieve. The selected bituminous mixture should have an Air Permeability Value that is at least about 8 cm2 so as to reduce its propensity for blistering during and after construction. Still further, the selected bituminous mixture should have desirable fatigue resistance and should be substantially water-impermeable.

Abstract: The use of a surfactant to improve the resistance of asphalt to degradation by a de-icer and/or an anti-icer, and optionally in addition to improve the resistance of said asphalt to degradation by water. The surfactant may be a fatty acid or a fatty acid derivative, such as at least one polymerised fatty acid selected from dimers and trimers of an unsaturated fatty acid, or one or more amine or substituted amine compounds, such as a reaction product of tall oil fatty acids and polyalkylenepolyamines.

Abstract: Porous aggregates are coated with latex or water-based paints so as to lower the absorbility of the aggregates. When the paint-coated aggregates are mixed with an asphalt binder to produce an asphalt composition, the paint-coated aggregates absorb less of the asphalt binder, resulting in costs savings of the asphalt binder. In addition, the paint-coated aggregates avoid problems associated with selective absorption of components of the asphalt binder.

Abstract: The invention concerns a method for preparing a bitumen base, including the following essential steps: a) introducing a bitumen in a container equipped with mixing means, and bringing the bitumen to a temperature of 120° C. to 300° C.; b) introducing at least one chemical blowing additive into the container, and mixing, said chemical blowing additive being of general formula Ar1-R—Ar2 (1) wherein Ar1 and Ar2 independently of each other represent a benzene ring or a system of condensed aromatic rings of 6 to 20 carbon atoms, substituted by at least one hydroxyl group, and R represents an optionally substituted divalent radical, whereof the main chain comprises 6 to 20 carbon atoms and at least one amide and/or ester group. The invention also concerns a bitumen base obtained by implementing said method, as well as the use of such bitumen bases in road surfacing and industrial applications.