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Pavement includes a base consisting of drain layer, crushed stone layer of soft limestone and gravel, and coarse-grained bituminous concrete layer on which bituminous concrete blanket with surface treatment layer of interlocking black crushed stone with grain size up to 10 mm is placed. Bituminous concrete blanket is comprised by mineral bitumen composition of 50 mm thickness and the following component ratio, wt %: petroleum asphalt - 10.0-11.0; clayite gravel of 20-5 mm grain size - 12.0-14.0; crushed clayite sand with 5-0.16 mm grain size - 64.5-66.5; limestone powder of grain size under 0.16 mm - the rest. |
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Adhesion and cohesion modifiers for asphalt Composition includes a mixture of asphalt and aggregates in a system of additives distributed therein, said system of additives including: i) from about 10 to 60 wt % amine or modified amine surfactant and ii) from about 20 to 90% asphalt rheology modifying components. Said asphalt rheology modifying component includes: i) at least one wax component, ii) optionally one or more infusible components that are insoluble in asphalt and ii)at least one resinous component, and mixtures and combinations thereof. The amount of said system of additives in the asphalt composition ranges from 0.2 to 10 wt % per content of asphalt in said composition. The invention also relates to a method of improving water-resistance properties of a hot asphalt mixture containing aggregates. Said method involves adding an effective amount of said system of additives to said asphalt. |
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Method for thermal regeneration of asphalt concrete (four versions) Invention relates to road construction and specifically to a method for thermal regeneration of asphalt concrete. The method for thermal regeneration of asphalt concrete involves crushing asphalt concrete, moistening with aqueous solution of a complex organic preparation having an organic part in form of a complex of enzyme preparations in form of complex compositions obtained from culturing different microorganisms on a sugar- and fructose-containing culture medium, mixing the components, distributing the mixture and packing. The crushed asphalt concrete is first heated to temperature of 70-110°C and the moistened, with the following ratio of components, wt %: crushed asphalt concrete - 97-93, aqueous solution of complex organic preparation - 3-7, wherein the aqueous solution of the complex organic preparation is prepared with water solubility of 1:100 - 1:1000, depending on the initial concentration of the complex organic preparation, ambient temperature, duration of preparation of the asphalt mixture and the end of the packing process thereof. Versions of the method for thermal regeneration of asphalt concrete are also disclosed. |
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Method for cold regeneration of asphalt and concrete pavement layers FIELD: road repair works. SUBSTANCE: invention relates to road repair works and can be used to re-use the old asphalt. The method of cold regeneration of asphalt and concrete pavement layers consists in their loosening by milling, introduction of additions into the shredded material, mixing the components, distribution of the mixture and its compaction. Before milling the surface of the old coating is covered with a layer of shredded material produced before and mineral powder in the amount of 5% by weight of a mixture of milled and deposited materials, and as additives the powdered material is introduced with 4% of bitumen emulsion and 1.5% of cement in excess of 100% from the weight of the mixture of milled and deposited materials. EFFECT: increased strength of the regenerated layer and lower material costs. 1 dwg, 1 ex |
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Cement and asphalt-concrete mixture preparation method and its composition In preparation method of cement and asphalt-concrete mixture as mineral material there used is crushed stone and sand, and mixing is performed in two stages: at the first stage there separately prepared is "black" crushed stone and cement-sand solution; at that, "black" crushed stone is prepared by mixing the crushed stone with bitumen emulsion, and cement-sand solution is prepared by mixing the sand, portland cement and water; and at the second stage there mixed is prepared "black" crushed stone with cement-sand solution, and mixture is obtained at the following component ratio, wt %: crushed stone 40-72, sand 26-58, Portland cement 2-14, bitumen emulsion (more than 100%) 1-5, water-cement ratio (excluding water present in bitumen emulsion) 0.2-0.5. Composition of cement and asphalt-concrete mixture is described. |
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Road pavement surfacing or repairing method and method of repairing road pavement with grooves Invention refers to road construction industry and can be used during construction and repair of road pavements. Road pavement surfacing or repairing method involves levelling of the pavement till clearance level under a three-metre levelling board is not more than 3-5 mm, and laying thereon of protective and rough wearing coat. As protective and rough wearing coat, there used is dense asphalt mix containing the following, wt %: crushed stone obtained from hard-to-polish rocks with particle size of 3-10 mm or 5-15 mm - 65-70, sand of crushed hard-to-polish rock screening with particle size of up to 5 mm - 10-15, mineral limestone powder - 15-20, bitumen, above 100% of mineral part 5.5-6.5 with layer 15-25 mm thick, at the mixture temperature of 215-225°C, packing with vibratory beam of the asphalt laying machine at the speed of the latter of 1.0-2.0 m/min and pressing into the coating with the compactor. Method of repairing road pavement with grooves is described. |
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Strengthening method of road pavement Invention relates to door-repair work and can be used at strengthening of road pavement of non-rigid type. Strengthening method of road pavement by method of cold regeneration, consisting in milling of existing coating, introduction into grinned material of additives, mixing of components, distribution and compaction of mixture and laying of trailing layer. Milling is implemented with providing of 3-5% dual-slope cross slope of bottom of regenerated layer by means of installation of ends of rotor for different depth of tillage. |
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Method for pavement hardening and waterproofing (versions) Inventions concern the methods for hardening and waterproofing of the paved surfaces such as road and parking pavements. Application of the asphalt cutback layer onto the surface; application of a hardening mat over the surface, wherein the hardening mat has the first layer containing a nonwoven mat made of a mix of mineral and polymer fibers and the second mineral fiber layer attached to the first layer, and the asphalt cutback penetrates the hardening mat and impregnates it to create a waterproofing barrier, and the hardening mat is porous enough to allow the asphalt cutback to penetrate and impregnate it and absorbs at least about 0.32 l/m2 of asphalt cutback; and application of the pavement material over the hardening mat. Additionally described are versions of pavement hardening and waterproofing methods, and also a method for repairing a pavement with extended crack. |
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Invention relates to the field of construction and can be used during the construction of road surfaces for motor roads, aerodromes and pavements. Road surfacing includes the base - the drainage layer, a layer of rubble from weakly-durable limestone, gravel and a layer coarse-grained asphalt concrete, on which is placed a coating from asphalt concrete with a layer of surface processing located on it from black crushed stone-choke stone with sizes up to 10 mm. As the asphalt concrete coating mixture, a bitumen-expanded clay composition with a thickness of 60 mm is used with the ratio of components, mass. %: road oil bitumen - 12.0-13.0, keramsite sand of fraction of 0.14-5.00 mm - 66.0-70.0, expanded clay is the rest. |
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Method of cold recovery for pavement clothing layer Invention is attributed to road repair works and can be used for asphalt concrete recovery during repairing of pavement clothing for highways, municipal roads, pavements, areas, etc. Method of cold recovery for road clothing layers includes loosening of road clothing layers while adding necessary quantities of broken stone, sand, bonding substance and water and compaction of road clothing. As bonding substance, unhydrated lime carbonate is used. It is distributed onto old layer before recovery of road clothing layer while adding necessary quantities of broken stone and sand depending on grain size of road clothing layer being recovered, and water is added during recovery depending on humidity of road clothing layer being recovered and amount of bonding substance. Amount of substance and water and compaction of road clothing constitutes 2.5-3.0% of recovered road clothing layer mass. |
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Road paving construction method Method involves laying combined crack-stopping layer on road base, wherein the crack-stopping layer comprises elastic membrane and reinforcing geo-mesh laid thereon; laying load-bearing layer formed of asphalt-concrete mix onto crack-stopping layer. Combined crack-stopping layer is arranged on previously prepared road base. Road base preparation involves dividing road bed into several components, for instance blocks or fragments; compacting the blocks or fragments and placing ground layer thereon. The elastic membrane is leveling asphalt-concrete mix including organic binding agent. Binding agent composition is selected from minimal ambient temperature of road building site. Reinforcing geo-mesh material is selected to provide high extension strength and low deformation ability. Several variants of road paving creation method are also disclosed. |
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Method for motor road and aerodrome base construction Method involves in-situ preparing crushed-stone based mix; laying the mix on ground or drain layer in one or several layers; moistening the mix; impregnating thereof with emulsified asphalt and compacting the base. The crushed-stone based mix includes blast-furnace slag in amount of 30% by weight and steel slag in amount of 70% by weight or only blast-furnace slag. Before base compaction bitumen-mineral emulsion including liquid phase, namely potassium carbonates or sodium carbonates in amount of 1-10 l/m2 is added in slag-and-crushed-stone mix. The emulsion is poured over the mix and mixed thereto along with following mechanoactivation of obtained composition with medium-heavy and heavy road-rollers. Base is compacted with ramming road-roller. |
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Method for cracked paved surface repair Method involves laying reinforcing mat over crack; fastening reinforcing mat to paved surface from one crack side by applying adhesive on reinforcing mat surface and on paved surface or only on paved surface in crack area; pressing reinforcing mat to paved surface or adhesive correspondingly; leaving unsecured mat as it is from opposite crack side; laying paving material onto reinforcing mat. Reinforcing mat is formed of non-woven web including mineral and polymeric fiber mix. |
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Method for reinforcement of road pavement Method involves providing hot regeneration process by heating top layer of existing asphalt-concrete pavement through 3-5 cm depth; mellowing said layer by cutting; introducing into ground heated material novel mixture of porous or high-porous asphalt-concrete in an amount needed for leveling and reinforcing; mixing said components; distributing mixture; applying thereon novel mixture for high-density or dense asphalt-concrete in 2-5 cm thick layer; providing joint compaction of both layers. |
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Method of reconditioning of road pavement layers Invention relates to road building and repairing and it can be used at repeated use of old asphalt-concrete coating. According to proposed method of reconditioning of layers of road pavement coming to loosening of layers by milling, delivering of binder and water into milled material, mixing of components and distributing and compacting the mixture, layer obtained after compacting is heated to depth of 3-5 cm and loosened to said depth after which mixture is distributed and compacted. |
Another patent 2513833.