Method for reinforcement of road pavement

IPC classes for russian patent Method for reinforcement of road pavement (RU 2301292):

E01C7/18 - of road-metal and bituminous binders

E01C21 - Apparatus or processes for surface stabilisation for road building or like purposes, e.g. mixing borrowed aggregate with binder (stabilising soil under existing surfacing E01C0023100000; soil-conditioning or soil-stabilising materials C09K0017000000; soil-consolidation in general E02D0003120000)

Another patents in same IPC classes:

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.

Motor road asphalt carpet repair method / 2270897
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Plant for mixing soil at site / 2270285
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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.

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Method for forecasting of condition of motor roads with asphalt coats and assignment of justified timings of repair works / 2405882
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Arrangement of mixed bases and surfaces by method of wedging includes preparation of road bed with removal of surface layer of earth, arrangement of additional and upper layers of base with usage of crushed stone fractions of various size, methods of moistening and compaction. At the same time surface layer of earth is removed to depth of at least 300-500 mm below frost zone, additional layer is arranged by scattering of clay of natural humidity onto road bed with a layer of 150-200 mm, distribution of unwedging crushed stone with fraction of 70-120 mm on clay with at least double repetition of materials scattering and with layer unwedging and compaction so that compacted mass does not have any cavities, and upper layers of base are arranged by layer scattering of crushed stone with fraction of 50...70 mm and thickness of 150-170 mm, fraction of 20-40 mm with thickness of 70-100 mm, and also crushed stone siftings mixed in mixer with clay ground into powder at the ratio of 100-200 kg of dry clay per 1000 kg of siftings with further turning of all layers of upper base by knives of device for mixing of base composition, arranged in the form of frame, where serial sections are mounted with a row of knives, and knives of one section relative to another are arranged in staggered order, with further spillage with water in amount of 30…40 l/m² and subsequent compaction, wedging crushed stone elements to form cavity-free monolith.

Method to repair and construct arterial highways / 2422581
Future section of a road is cleaned from roots of trees, the road profile is levelled with potential preservation of natural soil structure, helical anchors are installed, a system of anchors is tightened with reinforcement and mesh reinforcement into a single web. The produced mesh reinforcement is filled with a concrete of low grade with coarse crushed stone filling, rolled with a roller having figured teeth for creation of cellular surface. As soon as the first layer settles, the second layer of concrete is applied, of a high grade with fine crushed stone, rolled with a roller having figured teeth of smaller value to create cellular surface. As soon as the second layer settles, the third layer of concrete is applied, of a very high grade with filling of glass crumbs and/or fine glass granules of irregular shape, rolled with a roller having figured teeth of smaller height to create cellular surface. The second version is also proposed, according to which the upper strengthening layer of the road bed is formed with the help of a burner, which converts sand into a variety of ceramics, which is also rolled with a roller with figured teeth to create cellular surface.

Method for cracked paved surface repair / 2306380
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Road paving construction method / 2318947
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Method of cold recovery for pavement clothing layer / 2331728
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.

Road surfacing / 2332535
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.

FIELD: road repair works used for reinforcement of non-rigid type road pavement and simultaneously for leveling said pavement.

SUBSTANCE: 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.

EFFECT: improved quality of reinforced and leveled road pavement.

2 cl, 1 ex

The present invention relates to road repair work and can be used for reinforcement of the non-rigid road pavement type with simultaneous alignment.

The traditional way of strengthening the non-rigid road pavement type involves laying the leveling layer and the layer (s) gain [1]. The disadvantage of this method is the high cost of operations.

There is a method of strengthening the pavement by means of hot regeneration of the upper layer of asphalt concrete pavement, lies in its heat at a depth of 3-5 cm, loosening milling, the introduction of preheated crushed material additives, mixing the mixture distribution, the application of a new layer of the mixture and joint seal both layers [2]. This method is closest to the proposed technical solution and the achieved result.

Machine for realizing this method can only operate in two modes: to submit a new mix in the mixer for mixing with the old crushed material (method of turbomachine) or to submit a new mix on the surface layer of old crushed material (method heat style & creation). In both modes, part of the new mixture is automatically spent on alignment coverage.

To align with the traditional method of repair is usually applied IU is it expensive mixture for porous and highly porous asphalt, and when the hot regeneration are forced to use more expensive mixtures for high-density or dense asphalt concrete, which is usually satisfied with the trailing layer.

The purpose of the present invention is the reduction of material costs.

This objective is achieved in that the coating is heated to a depth of 3-5 cm, loose milling, introducing preheated crushed material new mixture for porous or highly porous asphalt in an amount necessary to align and enhance, mix components, distribute the mixture, put on her new mix for high-density or dense asphalt concrete layer 2-5 cm and condense together the two layers.

Example. The existing road surface was heated to a depth of 4 cm with asfaltosmesiteli has loosened prestim the drum termomeeter (remixer), was added into the mixer of termomeeter new mixture for porous asphalt in the amount of 200 kg / m²to align and strengthen, put her termolecular in the form of friable layer was applied to the stacked layer paver new mix for dense asphalt concrete layer thickness of 3 cm and summarize both layers rollers. The result was a new aligned monolithic layer thickness of 9 cm, consisting in the lower part of the 6 cm layer of porous asphalt concrete (layer reinforcement) and in the upper part of the C 3 cm layer of dense asphalt concrete (the bottom layer). 50 kg / m²new smexii for porous asphalt left on the alignment of the old coating. The economic effect was the difference in the values of dense and porous asphalt.

Sources of information

1. Technical rules for the repair and maintenance of roads: VSN 24-88 / RSFSR Ministry of car roads. - M.: Transport, 1989. - 196 S.

2. Thermoresistor. Recommendations for use / Firm "milling". - Windhagen, 1993. - 83 C.

Method of strengthening the pavement by means of hot regeneration, involving heating of the top layer of existing asphalt pavement to a depth of 3-5 cm, loosening his milling, the introduction of preheated crushed material additives, mixing the mixture distribution, the application of a new layer of the mixture and joint seal both layers, characterized in that crushed the heated material is injected a new mixture for porous or highly porous asphalt in an amount necessary to align and strengthen, and distributed the mix put a new mix for high-density or dense asphalt concrete layer 2-5 see