Strengthening method of road pavement
 Method for pavement hardening and waterproofing (versions) / 2347031Inventions 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. |
 Road surfacing / 2332535Invention 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. |
 Method of cold recovery for pavement clothing layer / 2331728Invention 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. |
 Road paving construction method / 2318947Method 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. |
 Method for motor road and aerodrome base construction / 2317364Method 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. |
 Method for cracked paved surface repair / 2306380Method 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. |
|
Method for reinforcement of road pavement / 2301292 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. |
|
Method of reconditioning of road pavement layers / 2271415 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. |
 High-road pavement preparing device / 2350710High-road pavement preparing device consists of the frame on which the following is rigidly fixed: capacity for preparing the mass being laid, capacity for sand, capacity for gravel, and device movement mechanism. Scraping knife set to the required position with scraping knife position control mechanism is fixed in the frame front part by means of pivot levers. In the frame rear part there located is control device of layer thickness of the mass being laid. On the frame lateral sides there rigidly fixed are silos for supplied materials. Soil layer is supplied from scraping knife to conveyor, and, while moving, it enters the burning device and soil layer sieving device, and then it enters the capacity for preparing the mass being laid. Handling material is supplied by conveyors from silos to the capacity for preparing the mass being laid, and water is supplied from tank via pipeline. Mixing mechanism of the mass being laid provides the required composition thereof. Sand and gravel are supplied by conveyors from silos to sand and gravel capacities. The latter are located in the direction of location of device for connecting the high-road pavement in the following sequence: capacity for sand, capacity for gravel, and capacity for preparing the mass being laid. At that all the capacities are provided with adjustable nozzles, and mass being laid is supplied from capacity for preparing the mass being laid to transistor, and is laid on the bed. |
|
Method for reinforcement of road pavement / 2301292 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. |
 Motor road asphalt carpet repair method / 2270897Method involves stripping upper carpet layer along crack propagation direction; preparing base; pouring out bitumen and laying repair material in trench; forming artificial crack in newly-laid repair material layer along crack direction by installing channeling device having T-shaped cross-section and wedge-like cutting edge; evening repair material so that repair material surface is at height equal to cutting edge height and compacting thereof; removing the channeling device and filling the artificial crack with bitumen-based mastic. |
 Plant for mixing soil at site / 2270285Proposed plant is designed for mixing powder material with cohesive soil at site. Plant is provided with intake hopper for preliminary crushing of soil. Some amount of lime is added from lime feeding device when materials are transported into drum mixer. In proves of transportation, device with soil cutters acts onto cohesive soil to provide delivery of finely disintegrated material into mixing device. Additional powder components can be added into components in drum mixer by means of component feeding system. |
 Device for reinforcing soils / 2248429Device has towed device with platform, connected to moving gear, tank for reinforcing liquid, force pipes with bars with apertures in lower portion. Bars are made of conical shape with screw blades, mounted on a platform made in form of slides, and radiuses of bars effect overlap. In back portion of platform a screw is mounted. Tank for reinforcing liquid is placed in front portion of platform and by gear pump is connected to distributing comb, each force pipe, which through locking armature is connected to appropriate bar. Bars in amount no less than three are kinematically connected to each other, and to shaft for drawing power from moving gear, to screw and to gear pump for feeding reinforcing liquid. |
|
Device for reinforcing soils / 2248429 Device has towed device with platform, connected to moving gear, tank for reinforcing liquid, force pipes with bars with apertures in lower portion. Bars are made of conical shape with screw blades, mounted on a platform made in form of slides, and radiuses of bars effect overlap. In back portion of platform a screw is mounted. Tank for reinforcing liquid is placed in front portion of platform and by gear pump is connected to distributing comb, each force pipe, which through locking armature is connected to appropriate bar. Bars in amount no less than three are kinematically connected to each other, and to shaft for drawing power from moving gear, to screw and to gear pump for feeding reinforcing liquid. |
|
Plant for mixing soil at site / 2270285 Proposed plant is designed for mixing powder material with cohesive soil at site. Plant is provided with intake hopper for preliminary crushing of soil. Some amount of lime is added from lime feeding device when materials are transported into drum mixer. In proves of transportation, device with soil cutters acts onto cohesive soil to provide delivery of finely disintegrated material into mixing device. Additional powder components can be added into components in drum mixer by means of component feeding system. |
|
Motor road asphalt carpet repair method / 2270897 Method involves stripping upper carpet layer along crack propagation direction; preparing base; pouring out bitumen and laying repair material in trench; forming artificial crack in newly-laid repair material layer along crack direction by installing channeling device having T-shaped cross-section and wedge-like cutting edge; evening repair material so that repair material surface is at height equal to cutting edge height and compacting thereof; removing the channeling device and filling the artificial crack with bitumen-based mastic. |
|
Method for reinforcement of road pavement / 2301292 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. |
|
High-road pavement preparing device / 2350710 High-road pavement preparing device consists of the frame on which the following is rigidly fixed: capacity for preparing the mass being laid, capacity for sand, capacity for gravel, and device movement mechanism. Scraping knife set to the required position with scraping knife position control mechanism is fixed in the frame front part by means of pivot levers. In the frame rear part there located is control device of layer thickness of the mass being laid. On the frame lateral sides there rigidly fixed are silos for supplied materials. Soil layer is supplied from scraping knife to conveyor, and, while moving, it enters the burning device and soil layer sieving device, and then it enters the capacity for preparing the mass being laid. Handling material is supplied by conveyors from silos to the capacity for preparing the mass being laid, and water is supplied from tank via pipeline. Mixing mechanism of the mass being laid provides the required composition thereof. Sand and gravel are supplied by conveyors from silos to sand and gravel capacities. The latter are located in the direction of location of device for connecting the high-road pavement in the following sequence: capacity for sand, capacity for gravel, and capacity for preparing the mass being laid. At that all the capacities are provided with adjustable nozzles, and mass being laid is supplied from capacity for preparing the mass being laid to transistor, and is laid on the bed. |
|
Strengthening method of road pavement / 2365698 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. |
 Structure and construction method of motor roads / 2365700Invention relates to civil engineering field and can be used while arrangement of structure of motor roads. Road structure contains geotextile fabric 1, road bed 2, road metal layer 3, clutches of geotextile 4, layer of asphaltic macadam 5, herewith geotextile fabric envelopes road bed 2 and road metal layer 3 by closed shell. It provides ability at compaction to densify layers of road metal and road bed. In proposed structure geotextile fabric 1 can be laid by individual road beds connected by lockers 4, furthermore, for durability increasing of joining lockers are broached by studs, and for roads of high wigth it is provided application of geotextile with anchor clamps and absence of shell made of geotextile in the basis of roads. Stud from one side allows flat head thrusting into asphalt concrete, and from the other side pointed head, which broaches locker and is kept by projection up to falling-out before laying of asphalt concrete. Construction method of road structure consists in that on prepared by height marks section it is laid geotextile two-three times (depending on height of road bed) exceeding width of road bed, then it is constructed road bed, it is laid road metal layer and projecting edges of geotextile on each side of road is wrapped over road metal, it is connected into locker, saturated by bitumen or other binder and over it is laid asphalt concrete. While wrapping of geotextile sides it is simultaneously wrapped geotextile by butts of road, forming from it closed shell. In case of need, into lockers there are installed studs and applied geotextile fabric with anchor clamps for saving of geotextile in the basis of road. |
 Method for forecasting of condition of motor roads with asphalt coats and assignment of justified timings of repair works / 2405882Thermal properties of asphalt coat are determined, namely, specific heat capacity Ch, free energy increment δF, coefficient of free energy deficit kdef, besides, initial value is value of specific heat capacity of asphalt coat in the beginning of operation, and change of this value is monitored in process of operation, curves of specific heat capacity and increment of free energy dependence on time are periodically built, starting from initial values with account of reference points, at the same time free energy deficit increment is determined, using the following formula: |
FIELD: construction.
SUBSTANCE: 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.
EFFECT: reduction of material costs.
1 ex
The present invention relates to road repair work and can be used for reinforcement of the non-rigid road pavement type.
There is a method of strengthening the non-rigid road pavement type by cold regeneration, which consists in milling the existing pavement on the same depth in the transverse direction, the introduction of the shredded material additives, mixing, distribution and compaction of the mix and laying closing layer [1, 2]. The disadvantage of this method is wastage of materials due to the fact that the regeneration of the existing pavement carry out at the same depth across the entire width of the roadway. In the calculation of the reinforcement design of pavement according to ONE [3] assumes its ravnopravnosti width, while most of the loads are on the truck lanes. This method is closest to the proposed technical solution and the achieved result.
The purpose of the proposed invention is the reduction of material costs.
This goal is achieved by the fact that the existing coating (makes cold regeneration) is milled to provide 3-5%gable cross slope soles regenerated layer by setting the ends of the milling drum to different digging depth, enter in ismel the obtained material additives, mix components, distribute and compact the mixture and put the bottom layer.
In the result, the thickness of the recycled layer decreases from the edges of the roadway to the axis of the road and the flow of binder is reduced.
Example. A survey of the existing road showed that the actual modulus of elasticity of road construction on the cargo lane was 240 MPa, and at a speed of 280 MPa when required for calculation of 290 MPa. To obtain the desired plug-in, it was enough to regenerate the pavement to a depth of 17 cm with laying on top of the recycled asphalt layer thickness layer 5 see the First pass of stabilizer with cutting widths of 2.5 m with a width of half of the roadway 3.75 m met on Grozavu strip to a depth of 17 cm in the middle of the strip with transverse slope of the milling drum 4%. Depth of milling, respectively 22 cm at the outer edges and 12 cm from the inside edge. The second pass was performed on the same half of the roadway on the fast lane with capture 1.25 m of the first strip with the same cross slope of the milling drum. Milling depth were respectively 17 cm at the junction and 7 cm in the axial edges. Similar operations performed on the second half of the roadway. When the consumption norms of foamed bitumen and cement 2.5 % by weight of the regenerated material of konomiya amounted to 1.5 kg/m 2.
Sources of information
1. Methodical recommendations on restoration asfaliseon coatings and the foundations of roads by way of cold regeneration. / Rosavtodor. - M.: Informator, 2002. 56 C.
2. Cold recycling. Application guide. / Firm "Milling". - Windhagen, 2nd Rev. edition, 2001. 169 C.
3. Design of rigid pavements: ONE 218.046-01. / Federal highway Agency of Ministry of transport of the Russian Federation. - M.: Informator, 2001. 145 C.
Method of strengthening the pavement by cold regeneration, which consists in milling the existing coverage, the introduction of the shredded material additives, mixing, distribution and compaction of the mix and laying closing layer, characterized in that the milling is performed with the provision of 3-5%gable cross slope soles regenerated layer by setting the ends of the milling drum at different depth of tillage.