Abstract: A modified bitumen consisting of a polyurethane wherein the polyisocyanate or polyisocyanate-dominated polyurethane prepolymer (or prepolymers) is first reacted with the bitumen to take advantage of the bitumen's hydroxyl and amine functionality and form an isocyanate-bitumen adduct to form a weatherproofing product.

Abstract: Methods are provided for treating intimately dispersed mixtures of water, bitumen, and fine clay particles, such as oil sands mature fine tailings (MFT). Select methods use dissolved silicate ions and a base (alkali), optionally in combination with a biopolymer, to flocculate a slurry. A mixing regime is disclosed involving the addition to MFT of silicate ions in solution and alkali, to initiate aggregation/destabilization of clay particles. Methods are exemplified that provide distinct sediment layers in conjunction with the release of residual bitumen (for example 40-50% of the initial bitumen content). In these exemplified embodiments, a densely packed bottom layer containing ˜75 wt. % solids showed high yield stress values (3.5-5.5 kPa) and entrapped little residual bitumen (0.2-0.3 wt. %). The methods accordingly segregate a material suitable for reclamation.

Abstract: A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.

Abstract: A process for treating a tailings stream comprising water, solids, and optionally polyacrylamide. The process involves (a) contacting the tailings stream with a silicate source for a pre-determined period of time to form a mixture; b) after a pre-determined period of time of at least 5 minutes, contacting the mixture with an activator to initiate gel formation, wherein the gel entraps the solids within the gel; and c) allowing the gel to strengthen and solidify; wherein the gel formation is delayed compared with a non-delayed process.

Abstract: A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.

Abstract: A method for repairing an aged or damaged asphalt pavement is provided. The method involves preparing a surface of the aged or damaged asphalt pavement by filling in deviations from a uniform surface plane with dry aggregate and compacting the dry aggregate; applying a reactive asphalt emulsion to the prepared surface; and passing an emitter over the prepared pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from about 2 microns to 1 mm that penetrates into the pavement to a depth of at least 2 inches. The asphalt pavement is repaired by disturbing voids and interstices in the damaged pavement without dehydrogenation of the asphalt, such that oligomers present in the aged asphalt are linked together into longer polymer chains to improve ductility of the aged asphalt.

Abstract: Provided herein is a tack coat for use with paving applications and a method of making the same. The tack coat is substantially non-tracking, and includes asphalt, a pH adjustor, an emulsifier, acrylic, and water. In certain embodiments, the tack coat may also include a stabilizer to prevent settling of the emulsion during storage. The method of producing the tack coat involves heating the asphalt in one tank, and heating the water and emulsifier in a second, separate tank. This mixture of the water and emulsifier is referred to as soap, and is then mixed with asphalt, and the acrylic may be added to the mixture immediately thereafter, with a stabilizer, or later, just prior to shipment of the product, in which case a stabilizer may not be required. The tack coat exhibits moderate softness, with a penetration value above 40 dmm.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from carboxylic acids, carboxylic esters and carboxylic anhydrides. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: A process for the treating a mature fine tailings stream is provided. Treatment comprises contacting an alkali metal silicate or polysilicate microgel and an activator with mature fine tailings, entrapping the sand and clay fines within a polysilicate microgel, spreading the silica microgel over a surface, and allowing the silica microgel to dry, and producing a trafficable surface.

Abstract: 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.

Abstract: An asphalt composition, process, and apparatus for repairing cracks and other distressed areas in road surfaces. The asphalt composition comprises an aggregate material and a cold pour asphalt emulsion, preferably a quickset cationic asphalt emulsion. The aggregate material will preferably be a graded aggregate material. The asphalt emulsion and the aggregate material will preferably be mixed together and then delivered into the distressed area in not more than 20 seconds. A small mixing assembly is preferably held in suspension over the road surface for continuously receiving and mixing the asphalt emulsion and aggregate components and delivering the mixture into the distress area.

Abstract: The drying time for aqueous asphalt emulsions used in the roofing and other waterproofing industries is shortened by separately applying an emulsion breaking agent to the substrate to be waterproofed, to the aqueous asphalt emulsion after it is applied, or both.

Abstract: A sprayable coating composition, and method of application, for coating asphalt paving surfaces. In the coating composition, a low bulk density aggregate material of sprayable particle size is suspended in a sprayable asphalt emulsion in an amount sufficient to increase the micro-texture surface roughness of the cured coating.

Abstract: The invention relates to coated material for the base layer of road pavement, made up of aggregate coated with a hydrocarbon binder, wherein the aggregate is more than 95 wt % of the coated material; wherein the aggregate includes a granular structure, which includes a plurality of granular fractions d/D; one intermediate fraction of which is less than 15% of the granules; wherein the hydrocarbon binder is less than 5 wt % of the coated material; wherein the coated material includes, after compacting, a void fraction of less than 8%; wherein the hydrocarbon binder is a hydrocarbon binder modified by adding polymers or oil, or modified by foaming or by emulsion, by means of which the modulus of rigidity of the coated material, once compacted, is higher than 9000 MPa.

Abstract: A method of forming a substrate for a sports surface of a sports pitch includes the steps of: a) Agglomerating plastics materials; b) Granulating the agglomerated plastics materials to form granules having a predetermined range of sizes; c) In situ coating the granules with a binding material so that they form a fluent material; d) Forming a layer of the fluent material on the site of the sports pitch; and e) Setting the laid material such that the granules adhere where they contact each other to form a voided water permeable structure.

Abstract: The present invention relates to a composition comprising bitumen and an alkoxylated amine, to a method for the production of such a composition, and to a method for paving a surface using such a composition. The present invention also relates to an preformulated additive package to be added to bitumen, comprising an alkoxylated amine and an anti-stripping agent.

Abstract: A method of inhibiting or preventing bonding between snow or ice and a substrate. The method includes applying an adhesive to the substrate, broadcasting an aggregate onto the adhesive, the aggregate having the capacity to receive an anti-icing chemical into the aggregate, and applying the anti-icing chemical onto the aggregate so that at least a portion of the anti-icing chemical is received into at least a portion of the aggregate.

Abstract: The present invention discloses an eco-friendly road surface material for thawing ice and snow and the methods of preparing and using the same. The preparation method includes the following steps: 1) adding 10-50 parts of snow thawing substances into 50-100 parts by weight of water, after dissolving the snow thawing substances completely, adding sodium hydroxide solution to adjust the pH value of the mixture to be 8-10, then adding 10-50 parts by weight of support material, and stirring, baking, milling and sieving the mixture to obtain a support powder loaded with snow thawing substances; 2) adding 15-40 parts by weight of the support powder loaded with snow thawing substances into 10-30 parts by weight of cation emulsified asphalt, then adding 10-30 parts by weight of aqueous epoxy resin, 10 to 50 parts by weight of water and the curing agent of aqueous epoxy resin to obtain the coating material for thawing ice and snow.

Abstract: A method of selecting a fiber modified layer for applying on an existing surface, comprising the steps of: providing a binder mixture having an effective amount of an aggregate material, a binder, and a plurality of fibers, wherein each of the plurality of fibers has a length greater than 0.25 inches; applying the binder mixture to a selected surface to form a fiber modified proposed layer; testing the fiber modified proposed layer for fatigue or crack resistant properties, where testing the fiber modified proposed layer for fatigue or crack resistant properties comprises using a Modified Disc Compact Tension Test in accordance with Modified ASTM D7313-07; and selecting the binder mixture for application on the existing surface for performance if the fiber modified proposed layer has fatigue or crack resistant properties.

Abstract: A bitumen based adhesive that includes asphalt and/or coal tar and at least one silylated polymer and/or silyl-terminated polymer. The bitumen based adhesive can also include a plasticizer.

Abstract: The invention includes a composition to coat a substrate comprising: an asphalt material; a polymer that is not a polyol; and a polyol. The polyol has a molecular weight of about 1000 to about 5000 and/or the polyol is present in an amount no greater than about 30% by weight of the total composition. Also included are coated articles that comprise a substrate coated with a coating layer, wherein the coating layer is formed from a composition that comprises: an asphalt material, a polymer that is not a polyol; and a polyol. Also included are methods of improving the processability of a asphalt material comprising combining together an asphalt material, a polymer that is not a polyol, and a polyol, wherein the resultant composition exhibits improved processability as compared to an asphalt composition that does not contain a polyol.

Abstract: The present invention is directed to a heavy duty pavement structure comprising an open-graded asphalt layer fortified with a non-segregating grout mixture. The heavy duty pavement structure is made through the steps including forming an open-graded asphalt layer and then fortifying the layer with a non-segregating grout mixture that includes a predetermined amount of portland cement, sand and cement binder system.

Abstract: Methods, compositions and systems for prolonging the lives of transportation surfaces, including pavement, runways, bridges and parking structures include chemically protecting the transportation surfaces. Chemical protection may be accompanied by physical alteration of the transportation surface, which may enhance one or both of a microtexture and a macrotexture of the transportation surface.

Abstract: A composite pavement structure comprises a wearing course layer and a base course layer disposed below the wearing course layer. The base course layer comprises aggregate and an elastomeric composition. The elastomeric composition comprises the reaction product of an isocyanate component and an isocyanate-reactive component. The isocyanate component comprises a polymeric isocyanate, and optionally, an isocyanate-prepolymer. The isocyanate-reactive component comprises a hydrophobic polyol and a chain extender having at least two hydroxyl groups and a molecular weight of from about 62 to about 220. The chain extender is present in the isocyanate-reactive component in an amount of from about 1 to about 20 parts by weight based on 100 parts by weight of the isocyanate-reactive component. The wearing course layer comprises aggregate which is the same or different than the aggregate of the base course layer. Methods of forming the composite pavement structure are also disclosed.

Abstract: The invention relates to coated material for the base layer of road pavement, made up of aggregate coated with a hydrocarbon binder, wherein the aggregate is more than 95 wt % of the coated material; wherein the aggregate includes a granular structure, which includes a plurality of granular fractions d/D; one intermediate fraction of which is less than 15% of the granules; wherein the hydrocarbon binder is less than 5 wt % of the coated material; wherein the coated material includes, after compacting, a void fraction of less than 8%; wherein the hydrocarbon binder is a hydrocarbon binder modified by adding polymers or oil, or modified by foaming or by emulsion, by means of which the modulus of rigidity of the coated material, once compacted, is higher than 9000 MPa.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from carboxylic acids, carboxylic esters and carboxylic anhydrides. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: The present invention relates to a method for applying a crack resistant coating on a surface, where the crack resistant coating increases resistance to high vertical and horizontal movements and high shear stresses on the surface. The method comprises the steps of applying a binding material to the surface, applying an aggregate mixture within 15 seconds of applying the binding material to the surface, and allowing the binding material to fill some of the air voids in the aggregate mixture to form a substantially voidless layer with a height of at least 0.38 cm.

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: The invention is a method of treating, restoring or sealing a surface comprising applying an emulsion comprising a latex polymer, a cationic emulsifier, and optionally a recycling agent to the surface to wet the surface and depositing a surface treatment layer on the surface, wherein the depositing step occurs while the surface is wetted. The invention also includes a surface pretreatment composition comprising water, at least one acrylic latex polymer, an aromatic recycling agent, and at least one cationic emulsifier. Furthermore, the invention includes the surface resulting from the application of the emulsion used in the invention and concentrated emulsions for use with the surface treatment composition.

Abstract: The present invention relates to emulsions comprising a (1?3)-?-D-glucan, a cationic emulsifier and a bituminous binder having a low penetration. The emulsion is storage stable whilst fast breaking, even under unfavourable environmental conditions such as high humidity and low temperature.

Abstract: A primer composition used for applying a radical-curable resin-based waterproof material onto a concrete floor slab of an existing or newly established road bridge, is a troublesome application. For example, it is a problem in that a large machine is required for application thereof. The primer composition is a resin composition containing a urethane (meth)acrylate resin, (B) a polymerizable unsaturated monomer containing a hydroxyalkyl (meth)acrylate (B-1) and another polymerizable unsaturated monomer (B-2), (C) a curing accelerator, (D) a paraffin wax, and (E) a drying aid, in which the above components satisfy a specific molar ratio and specific mass ratios. The primer composition has a good crack-load-following capability, blistering resistance, adhesiveness, and bending resistance. Also provided is a waterproof floor slab structure using the primer composition and a method for waterproofing a floor slab.

Abstract: Disclosed is a process comprising application of one or more successive hot-melt coatings to solid surfaces of an article or alternatively to a pavement surface, immediately followed by application of a water-thinned coating to the hot-melt coating. Preferred articles are comprised of forest products or ferrous metals and may be for interior or exterior use. This coating system can function as a primer applied at the point of manufacture of the article and intended to receive one or more additional coats of conventional paint. Alternatively, it can function as a finished coating system. Coating systems applied to pavement can be for lane marking. Coatings can be formed that are very durable on difficult forest product surfaces and can be designed to emit virtually no air pollutants and to be free of toxic or flammable solvents.

Abstract: A method for bonding together an existing substrate layer and a pavement layer, such that a strong adhesive bond is formed by using a tack coat, provided by an asphalt emulsion, in between the layers as the bond coat. The tack coat layer is a low-tracking coating which cures quickly such that the pavement layer may be applied to the substrate, hours to days after the emulsion is applied to the substrate. The asphalt emulsion comprises at least a first phase of from about 30% to about 70% of an asphalt composition, about 30% to about 70% water, and about 0.1% to about 3.0% emulsifying agent, stabilizer and/or additives, or 0.1% to about 30% if polymeric or other additves are also included.

Abstract: The drying time for aqueous asphalt emulsions used in the roofing and other waterproofing industries is shortened by separately applying an emulsion breaking agent to the substrate to be waterproofed, to the aqueous asphalt emulsion after it is applied, or both.

Abstract: A method of operating a paving system includes establishing a plan for paving a work area which is based on a positional temperature model. The method further includes receiving temperature data for paving material and comparing the temperature data with data predicted by the positional temperature model. Operation of the paving system is adjusted where actual data differs from model predicted data. A paving system and control system are provided having an electronic control unit configured to compare electronic temperature data with a positional temperature model for paving material. The electronic control unit can control machines of the paving system based on comparing actual data with model predicted data, and can further update either or both of a plan for paving a work area and the positional temperature model itself based on differences between actual data and model predicted data.

Abstract: A bituminous composition including, based on total weight of the bituminous composition, (a) hard bitumen in an amount of 0.5% to 7.5% by weight, the hard bitumen being characterized by a penetration number of 100 dmm or less at 25° C. as determined according to the American Association of State Highway and Transportation Officials (AASHTO) Method T49; (b) emulsifier in an amount of 0.0005% to 0.2% by weight, wherein the emulsifier has a Hildebrand solubility parameter of at least 19 (MPa)1/2; (c) water; and (d) aggregate in an amount of 90% to 99% by weight, the aggregate having an aggregate surface that is wetted with the hard bitumen, wherein the bituminous composition is at a temperature ranging from 50° C. to 140° C.

Abstract: The present invention relates to construction and installation of a world standard rainbow highway in rainbow colors and a method thereof. A long-distance bicycle tour such as a round-the-world trip is impossible due to nonexistence of a standard bicycle route, which is sympathized by all people on the Earth, in the six continents of the world, and environmental destruction on the Earth is so serious that the glaciers of the Antarctic have been rapidly melting down.

Abstract: A composition for use in a fiber modified layer, comprising an aggregate material, a binder, and a plurality of fibers, wherein each fiber has a length of greater than 0.25 inches. Also provided is a method of selecting a fiber modified layer for applying on an existing surface, comprising the steps of: providing a binder mixture having an effective amount of an aggregate material, a binder, and a plurality of fibers, wherein each of the plurality of fibers has a length greater than 0.25 inches; applying the binder mixture to a selected surface to form a fiber modified proposed layer; testing the fiber modified proposed layer for fatigue or crack resistant properties; and selecting the binder mixture for application on the existing surface for performance if the fiber modified proposed layer has fatigue or crack resistant properties.

Abstract: The present invention relates to compositions which are suitable for use as friction reducing agents, which can be particularly useful as release agents. The compositions comprise water and a surfactant capable of forming liquid crystals. The invention also relates to methods of production of such compositions, their use and substrates treated with such compositions.

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: A composite membrane comprises: a first layer of high-density polyethylene (HDPE) and a layer of asphalt applied over the first layer of HDPE. A second layer of HDPE sheeting is applied over the layer of asphalt. A method of creating a composite barrier to chemical vapors is also disclosed which comprises applying a base layer comprising high density polyethylene (HDPE); applying an asphalt layer over the base layer; and applying a top layer comprising HDPE over the asphalt layer.

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: This invention relates to bituminous compositions comprising an interpolymer and a bituminous material and methods of making and using same. The interpolymer may comprise ethylene, at least one alpha-olefin, and, optionally, at least one diene and the interpolymer is derived from polymer particles having a surface coating comprising a partitioning agent. Methods of making and using the bituminous compositions are also described.

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: The present invention relates to bituminous compositions suitable for use in paving applications containing water-in-oil bitumen dispersion of paving grade bitumen such as penetration-graded, viscosity-graded and/or penetration-graded varieties that is substantially free of volatile solvents and made by controlling temperature-dependent interfacial rheology through the use of selected surfactants. The invention paving compositions are suitable for use in the construction of load-bearing, high-traffic pavements at a temperature range lower than that required for conventional hot-mix bituminous paving compositions, yet with similar or superior compaction to densities property and at least equal cure rate.

Abstract: A foamed asphalt cement nozzle assembly is adapted for use in connection with a mixer for mixing aggregate materials and asphalt cement to make asphalt concrete. The foamed asphalt cement nozzle assembly includes a foamed cement mixing chamber, a first inlet for liquid asphalt cement and a second inlet for water, each of which is in fluid communication with the foamed cement mixing chamber. An outlet for foamed asphalt cement is also provided, which outlet is in fluid communication with both the foamed cement mixing chamber and the mixer. The invention also comprises a method for making asphalt concrete using foamed asphalt cement. The method includes introducing aggregate materials into the mixer and heating the aggregate materials to a temperature at least as high as the boiling point of water but no higher than about 285° F.

Abstract: A process for manufacturing asphalt is disclosed. The process comprises the steps of : (i) heating bitumen; (ii) heating aggregate; and (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt. From 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii) and from 0.1 to 20 wt % of paraffin wax is added in at least one of the steps (i), (ii) or (iii).

Abstract: A process for manufacturing asphalt is disclosed. The process comprises the steps of: (i) heating bitumen; (ii) heating aggregate; and (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt. From 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii) and from 0.1 to 20 wt % of a compound of formula A, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii). R1 and R2 are independently chosen from C6-C30 alkyl or alkenyl.

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 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 %.