Rock Asphalt Patents (Class 106/276)
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Patent number: 8882899Abstract: The invention relates to a method and a plant for producing asphalt mixture and is directed in particular to the recycling of recovered asphalt. In order to achieve recycling of up to 100% recovered asphalt and to produce an asphalt mixture with the required quality, it is provided according to the invention that at least the drying and heating of the asphalt granulate and/or aggregates are carried out in a low oxygen atmosphere. The low oxygen atmosphere is achieved by supplying low oxygen gases with an oxygen content of maximum 10%, preferably with an oxygen content of maximum 5%. The conveyance of the heated and dried asphalt granulate and/or aggregates, the siloing and mixing with bitumen to form a new, incorporation-ready asphalt mixture also usefully take place in a low oxygen atmosphere.Type: GrantFiled: December 28, 2009Date of Patent: November 11, 2014Assignee: LOESCHE GmbHInventors: Julia Aretz, Christian Barczus, Wladimir Garber, Stefan Wolber
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Publication number: 20120204761Abstract: The invention relates to a method and a plant for producing asphalt mixture and is directed in particular to the recycling of recovered asphalt. In order to achieve recycling of up to 100% recovered asphalt and to produce an asphalt mixture with the required quality, it is provided according to the invention that at least the drying and heating of the asphalt granulate and/or aggregates are carried out in a low oxygen atmosphere. The low oxygen atmosphere is achieved by supplying low oxygen gases with an oxygen content of maximum 10%, preferably with an oxygen content of maximum 5%. The conveyance of the heated and dried asphalt granulate and/or aggregates, the siloing and mixing with bitumen to form a new, incorporation-ready asphalt mixture also usefully take place in a low oxygen atmosphere.Type: ApplicationFiled: November 28, 2009Publication date: August 16, 2012Applicant: LOESCHE GMBHInventors: Julia Aretz, Christian Barczus, Wladimir Garber, Stefan Wolber
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Patent number: 7935749Abstract: Rubber particles in a water and polyhydric alcohol solution are added to an asphalt whereby the polyhydric alcohol substantially coats the rubber particles resulting in an easily mixed composition with the mixing temperature being reduced to a range of from about 250° F. to about 310° F. resulting in considerable energy savings. In a similar manner, a filler can be substantially coated by polyvinyl alcohol-water solution and the same blended with an asphalt and mixed at reduced temperatures. Another embodiment relates to the utilization of a polyhydric alcohol that is added to an asphalt and mixed therewith at reduced temperatures.Type: GrantFiled: April 17, 2008Date of Patent: May 3, 2011Inventor: David A. Carlson
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Patent number: 7838469Abstract: 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.Type: GrantFiled: October 10, 2008Date of Patent: November 23, 2010Assignee: Schlumberger Technology CorporationInventors: Eric Cunningham, Emmanuel Therond, Paulo Rubinstein
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Patent number: 7790225Abstract: Coatings and methods are provided. An embodiment of the coating includes microcapsules that contain at least one of a corrosion inhibitor, a film-forming compound, and an indicator. The microcapsules are dispersed in a coating vehicle. A shell of each microcapsule breaks down in the presence of an alkaline condition, resulting from corrosion.Type: GrantFiled: September 19, 2005Date of Patent: September 7, 2010Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Luz M. Calle, Wenyan Li
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Publication number: 20100206196Abstract: A bituminous composition with improved paving performance, comprising a high-concentration-emulsifier bituminous emulsion is disclosed. The high-concentration-emulsifier bitumen emulsion has a higher content of surfactant than the conventional bitumen emulsion, thus facilitating the use of low levels of emulsion in the finished bituminous paving composition. Additionally, the high-concentration-emulsifier bitumen emulsion has superior surfactant dispersion property compared to the inverted bitumen dispersion, thereby enhancing the mixing and coating performance of the bituminous composition. The disclosed bituminous compositions may be used in a pavement construction at a much lower temperatures range compared to the conventional hot-mix bituminous composition, yet it develops adhesive strength and load-bearing strength properties at rates comparable to those of hot mix bituminous paving compositions.Type: ApplicationFiled: February 18, 2010Publication date: August 19, 2010Inventors: Everett Crews, Jonathan S. Maclver
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Patent number: 7732510Abstract: A fuel resistant binder is characterized by the addition of a carrier curing agent to a modified, unmodified or emulsified asphalt material formed of a mixture of hot, cold or emulsified asphalt and carrier and activator materials. The carrier curing agent preferably is a polyurethane moisture curing solution. A cross-linking material and aggregate are also mixed with the binder to form a material suitable for patching cracks and holes in pavement and the like. The activator assists the polymer material in linking with the asphalt while the carrier prevents the formation of gel or lumps within the asphalt. The carrier curing agent resists the penetration of fuel into the binder.Type: GrantFiled: July 10, 2007Date of Patent: June 8, 2010Inventor: G. Mohammed Memon
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Publication number: 20090050016Abstract: The material component of this product is shale crude oil that is extract from shale rock.Type: ApplicationFiled: August 21, 2007Publication date: February 26, 2009Inventor: Anthony Lawrence Chirico
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Publication number: 20090013903Abstract: A fuel resistant binder is characterized by the addition of a carrier curing agent to a modified, unmodified or emulsified asphalt material formed of a mixture of hot, cold or emulsified asphalt and carrier and activator materials. The carrier curing agent preferably is a polyurethane moisture curing solution. A cross-linking material and aggregate are also mixed with the binder to form a material suitable for patching cracks and holes in pavement and the like. The activator assists the polymer material in linking with the asphalt while the carrier prevents the formation of gel or lumps within the asphalt. The carrier curing agent resists the penetration of fuel into the binder.Type: ApplicationFiled: July 10, 2007Publication date: January 15, 2009Inventor: G. Mohammed Memon
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Patent number: 6817152Abstract: The invention relates to a coated fiber mat of improved tear strength upon dividing pieces of the coated mat and the coating which comprises a cured, non-woven, fiber glass mat containing a polysiloxane wherein the fibers are fixedly distributed in a formaldehyde type binder containing a binder modifier which is a crosslinked styrene/acrylic polymer, and to a process for the preparation of the mat.Type: GrantFiled: September 18, 2003Date of Patent: November 16, 2004Assignee: Building Materials Investment CorporationInventors: Qinyun Peng, Krishna Srinivasan
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Patent number: 6544911Abstract: The invention relates to a coated fiber mat of improved tear strength upon dividing pieces of the coated mat and the coating which comprises a cured, non-woven, fiber glass mat containing a polysiloxane wherein the fibers are fixedly distributed in a formaldehyde type binder containing a binder modifier which is a crosslinked styrene/acrylic polymer, and to a process for the preparation of the mat.Type: GrantFiled: January 12, 2001Date of Patent: April 8, 2003Assignee: Building Materials Investment CorporationInventors: Qinyun Peng, Krishna Srinivasan
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Patent number: 6362257Abstract: The pavement patch composition of the present invention comprises a lightweight aggregate and highly modified polymer asphalt binder. The composition is formed by heating the binder to a flowable state, mixing the flowable binder with a lightweight aggregate, and then allowing it to cool into a solid form. The pavement patch composition is used to repair voids in pavement, such as pot holes, cracks and depressions. It is applied by heating solid pavement patch composition to a flowable state and applying it to the void, or on a surface in need of repair, and then allowed to cool. The resulting patch is self-adhering, strong and flexible. The formulation of the pavement patch composition may be adjusted for specific use in a cold climate, a moderate climate, a warmer climate, or for use in various traffic applications.Type: GrantFiled: August 27, 1999Date of Patent: March 26, 2002Assignee: Crafco, IncorporatedInventors: James G. Chehovits, Robert Lowell Parkison
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Patent number: 6045608Abstract: An improved process for making asphalt involves incorporating tar sands into a hot asphalt mix process and modifying the process. The improved process involves using a heated asphalt counter-flow drum mixer to admix asphaltic cement, coarse aggregate, and fine aggregate. During this mixing process, the admixture is heated to produce the asphaltic concrete. In the improved process from about 20 to about 80 percent tar sand is mixed with from about 80 to about 20 percent aggregate and from about 1 to less than about 5 percent liquid asphalt cement in a drum mixer to form an admixture, heating the admixture to a first elevated temperature (e.g., 250.degree. and 400.degree. F.) for a set period of time (e.g., 40 to about 90 seconds); and discharging the heated admixture at a second elevated temperature (e.g., from about 150.degree. to about 350.degree. F.) to produce asphaltic concrete.Type: GrantFiled: February 9, 1999Date of Patent: April 4, 2000Assignee: Ned B. Mitchell, Inc.Inventors: Gil N. Mitchell, Ned B. Mitchell
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Patent number: 5405440Abstract: A method of producing a cold mix asphalt paving composition by:(a) separating non-asphalt impurities from an asphalt rubble obtained from a reclaimed asphalt pavement to produce a purified asphalt rubble;(b) comminuting said purified asphalt rubble to obtain sized asphalt-aggregate mixture;(c) testing said sized asphalt-aggregate mixture to determine the percent of asphalt present in said asphalt-aggregate mixture; and(d) blending an asphalt emulsion with said asphalt-aggregate mixture in an amount so as to yield a cold mix asphalt pavement composition comprising from about 4.0% to about 6.5% by weight of asphalt.The cold mix asphalt paving composition is used to coat roadway surfaces, parking lots, driveways, and the like. Once the cold mix asphalt paving composition has been applied to a surface, a top coat may be overcoated onto the cold mix asphalt pavement.Type: GrantFiled: September 16, 1993Date of Patent: April 11, 1995Assignee: Global Resource Recyclers, Inc.Inventors: Harold C. Green, Daniel J. Shaw
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Patent number: 5362316Abstract: A cut-back composition useful for ambient temperature application to substrates comprising a resinous or residue-based component such as asphalt, polymer modified asphalt, coal tar, natural rubber or elastomers and a terpene solvent.Type: GrantFiled: February 5, 1993Date of Patent: November 8, 1994Assignee: Imperbel America CorporationInventor: Richard W. Paradise
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Patent number: 5169261Abstract: A pre-packaged bituminous sandstone material, which can be applied to damaged pavement areas at ambient temperatures, is prepared by comminuting bituminous sandstone in the presence of water to form an intimate mixture of bituminous sandstone having particles which pass through a one-quarter inch minus screen, preferably through a one-eighth inch minus screen with sufficient water, to form a material having a water content of from about 3% to about 20%, based on the weight of the mixture. The mixture is then packaged in a vapor-proof container, to maintain its water content. Damaged pavement is subsequently repaired simply by removing the mixture from the container and applying the material, at ambient temperatures, to the damaged areas.Type: GrantFiled: April 24, 1991Date of Patent: December 8, 1992Inventors: James L. Barnes, Dennis S. Barnes
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Patent number: 5089052Abstract: A method for emulsification of rock asphalt, the resulting low asphalt emulsion and low asphalt emulsion binder for aggregate is disclosed. Fine mesh rock asphalt is emulsified by using a hydrocarbon fluxing agent to sufficiently wet the rock asphalt to produce a fluid mixture, followed by addition of water, small amounts of surfactant and salts, heating the fluid mix while the mixture is being gently stirred. The rock asphalt emulsion can be formed from rock asphalts having low asphalt content, as low as 5, 6, or 7% by weight and greater. Depending on the rock asphalt ore source, the emulsion is comprised of varying amounts of hydrocarbon fluxing oils which are present in sufficient volume to form a fluid mix, from less than about 25% to greater than matching parts by volume of water, and lesser amounts of surfactants and salts. These emulsions have been found to be effective as binders for limestone aggregate coatings, seal, coats, pliable mats and other surprising applications.Type: GrantFiled: August 10, 1989Date of Patent: February 18, 1992Inventor: Allen C. Ludwig
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Patent number: 4847006Abstract: A method for long-term storage of radioactive waste in a solid bitumen is here taught. A granular ion-exchange resin (including radioactive ions) is mixed with a bitumen and water emulsion to produce a swollen aqueous product for encapsulation. The method is carried out at room temperature and optionally includes a cationic emulsion having a pH value of less than 4. The emulsion has a water content form 15-50% by weight and preferably is saturated with the water.Type: GrantFiled: June 19, 1987Date of Patent: July 11, 1989Inventors: Lars O. Hoglund, Hubert R. Eschrich
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Patent number: 4832874Abstract: A radioactive waste that chiefly contains sodium sulfate or sodium borate as a solids content is blended with a mixture consisting of about 5-35 wt % of a low-molecular weight polyolefin and about 95-65 wt % of straight asphalt, and the resulting mix is processed into a solidified form. The solidified waste thus obtained has a softening point at least 20.degree.-30.degree. C. higher than the hertofore attainable values and exhibits good shape stability at elevated temperatures.Type: GrantFiled: July 6, 1987Date of Patent: May 23, 1989Assignee: Ebara CorporationInventor: Mitsuhiko Nohmi
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Patent number: 4714629Abstract: Stone chippings of the type used in the manufacture of road surfaces by hotmix and surface dressing techniques, are rendered water resistant, and less susceptible to binder adhesion failure, by treatment with wax, preferably with wax emulsion.Type: GrantFiled: April 23, 1986Date of Patent: December 22, 1987Assignee: Mobil Oil CorporationInventors: Benjamin L. Davis, Joseph M. Dixon, Nicholas D. Page
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Patent number: 4359381Abstract: An apparatus for regenerating used mixtures for road pavement including an asphalt concrete mixture and a cement concrete mixture is provided with a first vibration sieve, conveyer, passage, roof, transferring means, guide means such as a V-shape plate and a screw conveyer, spray means such as water supply pipes, discharging means such as a hoist device, and a second vibration sieve. The asphalt concrete mixture together with others are sorted by the first vibration sieve, transferred in a given direction by the transferring means such as a container, heated by the hot water from the spray means, subdivided and sorted by the second vibration sieve.Type: GrantFiled: May 11, 1981Date of Patent: November 16, 1982Inventor: Michio Jinno
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Patent number: 4012537Abstract: A composition for admixture with road surface preparation materials to prevent formation of ice and to melt snow on the finished road surface. The composition is distributed throughout the road surface and comprises particulate thawing substances at least some of which have a watertight coating resistant to the thawing substance and to the temperature at which the composition materials are prepared for application as a road surface. The coating may, however, be worn away by mechanical action, e.g. traffic movement, to expose the thawing substance.Type: GrantFiled: June 7, 1974Date of Patent: March 15, 1977Assignee: Plastiroute SAInventor: Robert Dubois
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Patent number: 3986887Abstract: 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.Type: GrantFiled: August 23, 1972Date of Patent: October 19, 1976Assignee: Phillips Petroleum CompanyInventor: Armin C. Pitchford
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Patent number: RE39289Abstract: An improved process for making asphalt involves incorporating tar sands into a hot asphalt mix process and modifying the process. The improved process involves using a heated asphalt counter-flow drum mixer to admix asphaltic cement, coarse aggregate, and fine aggregate. During this mixing process, the admixture is heated to produce the asphaltic concrete. In the improved process from about 20 to about 80 percent tar sand is mixed with from about 80 to about 20 percent aggregate and from about 1 to less than about 5 percent liquid asphalt cement in a drum mixer to form an admixture, heating the admixture to a first elevated temperature (e.g., 250° and 400° F.) for a set period of time (e.g., 40 to about 90 seconds); and discharging the heated admixture at a second elevated temperature (e.g., from about 150° to about 350° F.) to produce asphaltic concrete. Preferably, the aggregate has a gradation of 10 to 25 percent passing a #4 sieve, and the admixture has substantially no added fines.Type: GrantFiled: April 3, 2002Date of Patent: September 19, 2006Inventors: Gill N. Mitchell, Tawna Kay Mitchell, Ned B. Mitchell