Abstract: A process for the manufacture of stockable dense road asphalt that is comprised of materials, having elements of a diameter from essentially zero to 10-30 mm, coated in a cutback or fluidified bitumen-based binder. The materials are separated into at least two granulometries. The first group is a grouping of the smallest elements. The second group is a grouping of the remaining elements. The first group is coated with a first bituminous binder emulsion which is a cationic cutback or fluidified bitumen emulsion with a fracture index greater than zero and having a residual binder viscosity measured on a Standard Tar Viscosimeter (10 mm, 25.degree. C.) of less than 50 seconds. The second group is coated with a second bituminous binder emulsion which is a cationic cutback or fluidified bitumen emulsion with a residual binder viscosity measured on a Standard Tar Viscosimeter (10 mm, 25.degree. C.) of between 1000 and 2000 seconds. Both the coated groups are then mixed together for a few seconds.

Abstract: The invention features an additive for a mastic coating comprising a cut-back asphaltic base material used in roof and construction applications. The additive comprising sodium bicarbonate in a range by weight of 1 part per 2-8 parts of the cut-back, asphaltic-type base material, has the dual purpose of accelerating the curing time and improving flame retardancy of the mastic coating.

Abstract: A novel asphaltic composition consisting of from about 2% to about 10% w/w of a hydrocracking residue which is the distillation residue obtained from a hydrocracking process of heavy crude oil in admixture with from about 98% to about 90% w/w of a conventional asphalt. These asphaltic compositions are especially useful when mixed with mineral aggregate to provide road mixes which lead to improved road construction or road paving.

Abstract: Compositions particularly adapted to the damping sheet are provided. They contain a binder component and a filler component consisting of inorganic fillers and an organic filler.The organic filler occupies from 1 to 25 parts by weight of the total amount of the filler and it is an organic fibrous filler having the fiber length of from about 50 to about 300.mu., the mean length being about 100.mu.. Quick lime occupies from 0.05 to 10 parts by weight of the total amount of the filler as one of the inorganic fillers. The compositions possess distinguished properties when used as the damping sheet for vehicles.

Abstract: An asphalt-based composition comprising an air-blown blend of hard asphalt flux and the residue obtained by vacuum distilling the product obtained by the hydrogenation of asphalt flux, the composition meeting coating grade asphalt specifications.

Abstract: Diatomite-modified membrane and slurry seal mixes having improved properties. An impermeable membrane suitable for protecting cement bridge decks and roadways has from 9 to 14% by weight asphalt, 0.5 to 3.0% diatomite with a preferred diatomite/asphalt ratio in the range of 0.08 to 0.30, with the balance being fine aggregate (sand). This membrane can be placed by conventional paving equipment, can withstand temporary traffic loading prior to installation of a wearing course, can be preformulated in sheets, and is a crack resistant (i.e., self-healing) under normal traffic loads. Also disclosed is a slurry seal cold mix with improved abrasion resistance, adhesion/cohesion, and tensile strength. With these improved characteristics, slurry seals can be useful as bridge deck and roadway membranes in addition to its standard overlay uses.

Abstract: The present invention is an asphaltic composition which is useful as a roofing asphalt formulation and method of making this formulation. The composition includes about 39 to 99 percent by weight of oxidized asphalt and between 1 and about 8 percent of oxidized polyethylene. It is preferred to use between about 0 to 40 percent of the saturant, which can be an unoxidized asphalt, to modify the viscosity of the formulation. There can be a filled asphaltic composition comprising about 40 percent by weight to about 99 percent by weight of the asphaltic composition and about 1 percent by weight to about 60 percent by weight of filler, which can be stone dust.

Abstract: The present invention is an asphaltic composition which is useful as a roofing asphalt formulation and method of making this formulation. The composition includes about 39 to 99 percent by weight of oxidized asphalt and between 1 and about 8 percent oxidized polyethylene. It is preferred to use between about 0 to 40 percent of the saturant, which can be an unoxidized asphalt, to modify the viscosity of the formulation. There can be a filled asphaltic composition comprising about 40 percent by weight to about 99 percent by weight of the asphaltic composition and about 1 percent by weight to about 60 percent by weight of filler, which can be stone dust.

Abstract: A cold ramming mix suitable for ramming of alumina reduction cell cathode seams at ambient temperature comprising:(A) a solid portion comprising:(I) from about 30 to about 60 weight percent of coarse calcined anthracite;(II) from about 50 to about 30 weight percent of anthracite dust; and(III) from about 1 to about 10 weight percent graphite dust;(B) from about 5 to about 15 weight percent based on the weight of the solid portion of a binder pitch; and(C) from about 5 to about 10 weight percent based on the weight of the solid portion, of a heavy petroleum distillate oil having a 95% distillation range of between about 370.degree. and 540.degree. C.A method for producing such a mix comprising blending A and B to provide a homogeneous mixture and subsequently blending in C under conditions which assure that the pitch binder is not dissolved in the oil of C is also described.

Abstract: More ductile asphaltic pavement compositions, obtained by use of a certain blended Trinidad asphalt cement and certain aggregate mixtures, all in certain proportions.

Abstract: A liquid asphalt composition comprises a mixture of asphalt and a hydrocarbon having over about 55% by weight aromatic content, which mixture is useful for being added to asphalt-aggregate recycle compositions during processing.

Abstract: A process for improving the properties of a bitumen which comprises mixing the bitumen with from about 5 to 20% by weight based on the bitumen, of a polyolefin wax at an elevated temperature for a period of time necessary to form a homogeneous mixture. The modified bitumen is particularly useful as a binder in asphalt to be used for casting.

Abstract: The employing of finely-divided and naturally-occurring particulate matter of Trinidad Asphalt to lock or hold the aggregate filler mixture of the pavement mix in position, almost entirely filling the mix with soft bitumen, permitting subsequent compacting (as by rolling) to a state of substantial voidlessness, and thereby achieving a pavement which is both strong with respect to bearing strength yet soft and/or flexible with respect to its tendency to crack, and which will optimize a sort of self-rehealing of the membrane if cracking should start to occur.

Abstract: This disclosure relates to a new organic base, asbestos-free, asphalt-aluminum coating composition for use on roofs and the like. By the use of a gelling agent in place of asbestos fiber, a product with superior reflectivity is obtained which contains less aluminum than typical asbestos-containing coatings. In addition, since no water is used in the formulation of the composition, the possibility of producing such undesirable by-products as hydrogen gas or aluminum hydroxide is virtually eliminated.

Abstract: A mastic asphalt suitable for coating underwater pipelines comprises8-22% wt. bitumen,8-25% wt. filler passing a 75 microns sieve,84-53% wt. aggregate in the grading range from larger than 75 microns to a maximum particle size of from 2.36 to 37.5 mm.,the aggregate having a grading curve close to a modified Fuller curve for particles of the maximum size chosen, the modified Fuller curve being the Fuller curve recalculated to exclude material passing 75 microns.

Abstract: An asphalt regenerating apparatus including a drum in which blade means is provided and hot water is contained is disclosed. The asphalt waste is introduced into the drum and heated by the hot water contained in the drum. By revolving the blade means, the heated asphalt waste is subdivided, thereby becoming aggregate particles each having the surface coated with a thin asphalt film.

Abstract: New polythiols-polyesters and corresponding polysulphides in the --SH group wherein sulphur is contained in the alcohol residue after the formation of esters. These polyesters are derived from aliphatic polyacids, saturated or not, wherein the molecule contains a minimum of 15 atoms of carbon. They are formulated by the action of a mercapto-alcanol on the corresponding polyacid, in a liquid which gives an azeotropic mixture with water. These products are useful as additives to asphalts, bituminous products, coatings, mastics and cements.

Abstract: Steam is injected into water to regenerate asphalt waste which is heated in the water to a predetermined temperature. Such heated asphalt waste is mechanically subdivided in the water into aggregate grains each having its surface coated with a thin asphalt film.

Abstract: An additive for admixture with road surface preparation materials to prevent formation of ice and to melt snow on the finished road surface. The additive is distributed throughout the road surface and comprises coated particles of a halide, e.g. calcium chloride, coated particles of an alkali metal hydroxide, e.g. sodium hydroxide and a trace of coated or uncoated particles of calcium hydride, the coatings being of a water-tight inert substance such as linseed oil. These coatings are worn away at the road surface by traffic to expose the particles.

Abstract: There are provided improved asphalt cements and bituminous paving compositions containing certain reinforcing filler compositions which impart desirable properties thereto. The filler compositions of the invention are asphalt-dispersible pellets comprising certain carbon blacks which have been treated with certain non-volatile petroleum oils.

Abstract: The dissolving and/or dispersing of relatively large proportions of reclaimed rubber into molten paving asphalts is facilitated by incorporating into the asphalt a minor proportion of a highly aromatic, high-boiling, high-flash-point mineral oil. The resulting mixtures can be held at temperatures above 300.degree. F for substantial periods of time without becoming too viscous for convenient handling, thereby facilitating the application thereof to roadways. The rubberized asphalt mixtures are particularly useful in the form of stress absorbing membrane interlayers between old, damaged pavement surfaces and an overlayer of new asphalt concrete, for providing chip-seal coatings over old pavement, as crack fillers in Portland Cement concrete or asphalt concrete pavements, and bridge deck waterproofing membranes.

Abstract: A precursor composition, especially useful for making a patching and coating composition, and having unusual physical properties, comprises at least one non-air-blown, solvent extracted asphalt, at least one polyhydroxy polymer, at least one polyhydroxy compound, at least one polyamine, at least one solvent, and, optionally, at least one filler. This precursor composition, where combined with at least one polyisocyanate, forms a composition especially useful for coating and for patching coating.

Abstract: A modified gilsonite base encapsulating system having improved sound suppression properties and rheologically controlled characteristics. In one aspect of the invention and in one form of the preferred embodiment, a potting compound is provided wherein the gilsonite is modified by thermal depolymerization. In another form of the preferred embodiment, the gilsonite is modified by the addition of a process oil having a viscosity gravity constant of 0.97 and a viscosity in SSU at 100.degree. C of 48.4 and comprises at least 21% by weight of the composition. Silica filler is added to produce a potting compound having quite unexpected sound suppression qualities.In another aspect of the invention, a gilsonite based coil impregnant compound is provided to produce a material quite compatible with the potting compound. To approximately 75 - 80% of modified gilsonite is added about 20 - 25% by weight of ethylenediamine bisstearamide to produce a mixture having a softening point of from 125.degree. - 130.degree.

Abstract: A paving composition comprising asphalt and micro-granular coal which are uniformly combined integrally with each other without thermal decomposition of said coal and a method for producing a paving composition which comprises triturating a mixture of asphalt and coal at a temperature below the thermal decomposition point of the coal thereby to reduce the diameter of the resulting micro-granular coal to 1 to 100.mu. and, at the same time, to achieve the uniform integral combination of asphalt and coal. Thereby, there is provided a paving composition which is excellent in thermal stability, weather resistance, adhesive property, sticking strength, viscoelasticity and workability. Moreover, besides the main components, asphalt and coal, various modifying agents or additives may be further incorporated so that the properties of the paving composition can be further improved.

Abstract: In recycled asphalt-aggregate compositions prepared by adding a suitable amount of make-up asphalt to pieces of the used composition and heating the mixture in a rotating cylindrical drum by tumbling the composition over heated pipes as it is gradually directed towards an output end of the drum, the improvement comprising adding an amount of petroleum hydrocarbon to achieve a laid down asphalt penetration of between 25 and 300 dmn at 77.degree. F. A further embodiment of the improved process comprises venting a mixture of hydrocarbon gases and moisture vaporized from the hot composition mixture at the output end of the apparatus, condensing the moisture and removing it and returning the hydrocarbon gases to a combustion chamber for providing heat to the apparatus tubes.

Abstract: Bituminous compositions suitable for road paving materials characterized by a Penetration Ratio of at least 25 and a minimum viscosity at 275.degree. F. in the range from about 50 Saybolt Furol Seconds to about 120 Saybolt Furol Seconds, depending upon the penetration grade of the bituminous material, are produced by blending a vacuum-reduced naphthenic asphalt and a residual asphalt having a lower penetration but a higher viscosity than the vacuum-reduced naphthenic asphalt.

Abstract: Method of producing a mixture of bitumen and subdivided solid mineral matter, comprising mixing pure bitumen with subdivided solid mineral matter containing moisture in at least such proportion as is picked up by the mineral matter from the atmosphere and heating the mixture to a temperature of about 120.degree. to about 250.degree. C.

Abstract: There are provided improved asphalt cements and bituminous paving compositions containing certain reinforcing filler compositions which impart desirable properties thereto. The filler compositions of the invention comprises certain carbon blacks which have been treated with certain non-volatile petroleum oils.

Abstract: Disclosed is a pitch impregnant composition comprising coal tar pitch, oxidized, or unoxidized petroleum pitch with stearic acid, and particulated metallic pigments including copper, aluminum, steel, silver, iron, tin, nickel and zinc metals and copper-zinc alloys. The process comprises forcing the molten impregnant composition into the surface of the porous article preferably by imposing pressure on the impregnant composition while the article to be treated is immersed therein. Articles so treated exhibit a metallic surface appearance.

Abstract: A surface layer for traffic areas such as roads and airport landing strips is produced by laying a load-carrying structure comprising chip grains of mean diameter of from 2 to 25 mm, with a mean size ratio of not more than 1:3 between the smallest and the biggest grains mainly present in the mixture and a bituminous binder comprising stiffening fillers and/or elastomers, compacting the structure and inducing a flowable mortar of high viscosity to penetrate the structure to its entire depth.

Abstract: Asphalt fractions unsuitable for use in paving formulations because of their inhomogeneity (as reflected by their inability to pass the Oliensis Spot Test) can be used to make homogeneous asphaltic compositions (which pass the Oliensis Spot Test) by combining them with a propane precipitated asphalt and/or petrolene fraction. The latter fractions must have a polar aromatic content of at least 20%. Optionally up to 10% vacuum gas oil can also be added to the compositions. These upgraded asphaltic compositions have a polar aromatic content of at least 30% and are useful in paving formulations.

Abstract: In recycled asphalt-aggregate compositions prepared by adding a suitable amount of make-up asphalt to pieces of the used composition and heating the mixture in a rotating cylindrical drum by tumbling the composition over heated pipes as it is gradually directed towards an output end of the drum, the improvement comprising adding an amount of petroleum hydrocarbon to achieve a laid down asphalt penetration of between 25 and 300 dmm at 77.degree. F. A further embodiment of the improved process comprises venting a mixture of hydrocarbon gases and moisture vaporized from the hot composition mixture at the output end of the apparatus, condensing the moisture and removing it and returning the hydrocarbon gases to a combustion chamber for providing heat to the apparatus tubes.