RU2740138C2 - Method of patching road pavement - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: in method of patching road pavement removal of defective part of road by milling with formation of recess with given contour and size, clogging of the recess with a pre-formed plug having a size and a contour corresponding to the size of the said recess, wherein the surface of the plug is heated before it is inserted into the recess on the road. In prepared recess is placed asphalt concrete plug in form of truncated pyramid with preliminary spraying of conjugated surfaces bitumen emulsion, further, n number of prefabricated plugs is laid into prepared recess; wherein they are laid in prepared groove in following sequence—first plug with wide side up, the next plug is laid with smaller side upwards, alternately changing position of each next plug.

EFFECT: method is proposed for patching of road pavement.

1 cl, 5 dwg

Description

The invention relates to road construction and can be used in the repair, including selective, of deformed upper layers of the road surface, such as cracks, potholes, shifts, irregularities, etc.

For the repair of road surfaces in adverse weather conditions, it is important to prepare and procure the necessary materials. Pre-prepared asphalt concrete mixtures are promising. Such mixtures are harvested in advance (in summer) at the plant, briquetted and stored under a canopy. In the cold season, they are heated, the resulting mixture is placed in a prepared pothole and compacted. Briquetted asphalt mixes used for laying in the cold season must have a high bitumen content. The water saturation of standard laboratory samples should be close to the lower permissible limit (1.5-2% by volume). Mineral powder is applied only when activated. Asphalt concrete mixtures are used medium- or fine-grained, less often sandy. The mixtures are briquetted at the ABZ. The size of the briquettes, in principle, is not limited, but taking into account the convenience of work, the mass of one briquette should not exceed 10 kg. Briquettes are stored in natural conditions under a canopy in a dry state. For the repair of coating defects, a method is proposed using asphalt concrete briquettes. The pothole on the pavement is cleaned, asphalt concrete briquettes are placed in it, before the briquettes are laid, the bottom of the pothole is heated to a plastic state and loosened. During heating, briquettes are periodically turned over for uniform heating. Then the old coating with a pothole and briquettes in it is loosened and compacted. Hot bitumen paste with a thickness of 1.0-1.5 mm is applied along the border of the old and new coatings. Piece workpieces for coating repairs are also used in the UK. The hole in the coating is filled with a plug made of pre-prepared bituminous material! In addition to bitumen, the material contains a small amount of crumb rubber and a filler of lime and Portland cement. The plugs are pressed into the pothole. A thermoplastic polymer solution is applied to the cold asphalt concrete plug and the surface to be repaired. After the solvent has evaporated, the patch and the repaired area are firmly connected under pressure or when heated. In Japan, repairs to an asphalt-concrete road are also made by placing a special patch in a pothole. This patch is heated from above with a high-frequency heater until the inner layers of the coating are warmed up. Then the asphalt concrete is thoroughly crushed and mixed with a rotating mill, after which it is leveled and compacted with a roller. For repairs, patches are used that are cut from a pre-prepared sheet cover. Oxidized bitumen as the main component is mixed with lubricating oil and lime, obtaining a high-viscosity liquid, into which a special cloth is then immersed. After adsorption, a sheet is formed, on the surface of which crushed stone and artificial aggregate are evenly scattered. Such sheets of the required dimensions are glued to the repaired surface of the coating using synthetic adhesives. Works can be carried out in any weather. In Russia, a repair method has been proposed, in which a defective place is destroyed by drilling cylindrical holes in it, and the products of destruction are removed. The holes are treated with a bitumen binder and pre-prepared asphalt concrete disks are embedded in them. In Germany, a technology is used to repair or replace parts of road asphalt pavements, which includes: removal of damaged areas of the pavement, laying prepared briquettes, softening them by heating and adjusting them to secure them along the contour of the site. In the United States, a new method has been proposed for repairing asphalt pavements using a standard shape, which has a number of tapered cuts of various diameters. In the course of work, a round hole is cut out in the pavement, then the appropriate size of the smaller diameter of the cone hole is selected in the proposed form, the entire cone is filled with asphalt concrete mixture and pressure is applied from the side of the larger hole of the cone. As a result, the asphalt concrete mixture tightly fills the holes in the pavement, providing a reliable connection to its edges and the required evenness of the entire asphalt pavement area.

Known ready-to-use without prior preparation and without special equipment tape flexible material based on bitumen and a polymer of the SBS type, used as a sealing and insulating material, described in French patent application No. 2898613, publ. 09.21.07 by MKI: D06N 5/00.

The specified material is a layer with a thickness of 2.5-4.0 mm, a width of 1000 mm, made of a mixture of bitumen, SBS elastomer (styrene-butadiene-styrene) and a mineral filler, in the thickness of which there is a reinforcing element - a thin fabric, the parameters of which are width and length repeat the parameters of the material. The specified material, called a membrane in French patent application No. 2898613, due to the resistance of its working layer to moisture and other environmental influences, is used in construction for sealing and insulation, including sealing the joints of the elements of building structures to be joined. In addition, this material is a product ready for use in any conditions, subject to storage and transportation without loss of its inherent properties.

However, with all its positive and useful qualities, this material is very thin and not suitable for use as a building material, therefore, during sealing, the described membrane is used to form only a surface, final layer on the insulated and / or sealed surface. Also, due to such a small thickness of the working layer, this material is not suitable for use in the construction and repair of road surfaces.

Known tape road-building material based on bitumen and thermoplastic elastomer (RF patent No. 83512, IPC E01C 5/20, D06N 7/00, op. 10.06.2009), having a layered structure, including at least two superimposed on one another and pressed between each other layer, each of which is made of mastic based on bitumen and thermoplastic elastomer and contains a fixedly installed substrate treated with an anti-adhesive composition and located on the open surface of any of the layers, while the ratio of the width of the material to the thickness of its pressed layers is, respectively, 20: 3-300 : 30, and the ratio of the length of the material to its width is 10-20: 20-300. The ratio of the width of the material to the thickness of its layers is, respectively, from 0.7: 10 to 2000: 7. As a mastic based on bitumen and thermoplastic elastomer, it contains mastic containing 2-8 wt. % polymer of linear or branched structure C-B-C, 0.5-1.5 wt. % adhesive additive, 3-15 wt. % rubber crumb, 3-10 wt. % plasticizer, 3-8 wt. % petroleum resin type, 5-20 wt. % dolomite flour, road bitumen - the rest. The mastic additionally includes 2-4 wt. % high molecular weight rubber.

The disadvantage of the known technical solution is that it is difficult to control the sequence of technological operations for the high-quality performance of complicated work, which leads to a deterioration in the quality of the coating of the repaired area.

There is a known method of patching a road surface, which consists in surface preparation, application of a primer using lignosulfates, laying a lignomineral mixture for repair, development, compaction, exposure in air for 6-8 hours, followed by heat treatment for 20-40 minutes, at a temperature of 250- 350 ° C (ed. St. N 1530607, class C04B 26/26, 1987).

However, the road surface made by the known method has a tendency to swell, which is fraught with the formation of ruptures, cracks, chipping at high humidity and sharp temperature changes in the autumn-winter period. In addition, the known method provides for additional heat treatment of the coating, which requires additional processing equipment and energy costs.

There is a known method of eliminating local depressions on the asphalt concrete pavement of highways (RF patent No. 2554954, IPC E01C 23/00, E01C 7/18, op. 10.07.2015), cleaning the deepening, placing in it a granular asphalt mixture of bitumen and filler and forming a local cover. The walls and the bottom of the pre-cleaned local recess are moistened with a flammable liquid and a flat combustible element is placed at the bottom of the recess, and a support element in the form of a sheet mesh material, for example, from heat-resistant polymer fiber and mineral fiber, is placed above the cleaned local recess, ensuring its fixation on the road surface, along At least from two opposite sides of the contour of the local depression by mechanical compression, and then a granular asphalt concrete mixture of bitumen and coarse mineral filler is laid on the support element with a layer necessary for sealing the depression, and before forming it by compaction of the coating over the local depression, a flat combustible element is burned in it by ensuring its ignition by setting fire to a flammable liquid on the surfaces of the recess and supplying air under the support element by pumping it with a pump.

A known method of performing a pavement of cast asphalt concrete using asphalt concrete briquettes (patent No. 2483152, IPC E01C 7/00, op. 05/27/2013), includes the delivery of asphalt briquettes to the place of work, and in a preheated coher, bitumen is melted, then bitumen is added the rubber compound, after which, with constant stirring, asphalt concrete briquettes are added, boiled until a homogeneous mass is obtained, and the resulting mixture is unloaded to the surface.

The disadvantage of the known technical solutions is that the known method provides for additional heat treatment of the coating, which requires additional processing equipment, energy costs.

The prototype of the claimed invention is a set of ingredients for eliminating depressions on the asphalt concrete pavement of highways and a method of using such a set to eliminate local depressions (RF patent No. 2611769, IPC Е01С 23/09, Е01С 7/18, op. 01.03.2017). A set of ingredients for eliminating local depressions on the asphalt concrete pavement of highways consists of granular asphalt concrete mixture and combustible particles (grains), for example, from solid peat (sawdust), each of its constituent ingredients is placed separately in a sealed waterproof container, for example, in a polymer bag, with a given measured mass, and the free space between the granules of the asphalt concrete mixture after placement in the container before its sealing is not less than two-thirds of the container volume filled with water until the moment of use. A method of using such a kit to eliminate local depressions is also described. A method of using a set of ingredients to eliminate local grooves on the asphalt concrete pavement of highways, carried out using the ingredients involved in the set, characterized in that the implementation of the method is carried out in sequential execution of operations, namely: video recording of the location of the groove, cleaning the local groove and alternating laying, if necessary, several times, i.e. layer by layer, into the deepening of the sublayer of combustible particles and the sublayer above it of the granular asphalt concrete mixture from the containers of the set with wetting the sublayer of peat particles with a combustible liquid, for example, kerosene or gasoline, followed by setting it on fire with the simultaneous formation of a partially or generally asphalt concrete from the sublayer of the granular mixture laid above it covering over the local recess and video recording of the location of the recess after its elimination.

The disadvantages of the known technical solution include the fact that the set of ingredients for eliminating local depressions consists of granular asphalt concrete mixture and combustible particles (grains), for example, from solid peat (sawdust), each of its constituent ingredients is placed separately in a sealed waterproof container; when selectively repairing the road surface in this way, it is technologically difficult to achieve the same density and strength of the main surface and compacted asphalt concrete mixture for repairing the road surface. In addition, the known method provides for additional heat treatment of the coating, which requires additional processing equipment and energy costs.

The prototype of the claimed invention is a Method for eliminating spalling or other defects in the upper surface of a concrete road (Patent GB 1302701, IPC E01C 23/096; E01C 23/09, op. 10.01.1973), including cutting out a defective part of the road with the formation of a depression having a given contour and a size, plugging a recess with a pre-formed block or an assembly of side-by-side blocks, a block or blocks made of concrete or other wear-resistant material, and a block or assembly of blocks having a size and outline corresponding to the size of said recess to ensure a loose fit thereto and securing the block or blocks in position in the recess with a layer of adhesive bonding material located between the wall of the recess and the block or blocks and attached thereto.

The disadvantages of the known technical solution include the fact that when selectively repairing the road surface using this method, it is technologically difficult to achieve the same density and strength of the main surface and compacted asphalt concrete mixture for repairing the road surface. In addition, the known method provides for additional heat treatment of the coating, which requires additional processing equipment and energy costs.

The objective of the invention is to create an organizational and technological basis (base) for the prompt elimination of local depressions after their detection on the road surface by balancing the geometric size and structure of a device suitable for mobile use in construction and repair, and a method of using this device.

The technical result of the invention is the ability to quickly eliminate local depressions after their detection on the road surface without the use of energy-intensive devices, through the use of the developed method using pre-prepared plugs from the asphalt concrete mixture, which leads to an increase in the service life of the resulting coating, a decrease in its cost, while maintaining high performance characteristics of the coating.

This is achieved by the fact that in the Method of patching a road surface, including removing a defective part of the road with the formation of a depression with a given contour and size, plugging the depression with a pre-formed plug having a size and contour corresponding to the size of the said depression, while the surface of the plug is heated until how it will be inserted into a recess on the road, according to the invention, the removal of the defective part of the road is carried out by milling the old asphalt concrete in the places of its deformation, an asphalt-concrete plug is placed in the prepared recess in the form of a truncated pyramid with preliminary spraying of the mating surfaces with a bitumen emulsion, then n - quantities are laid in advance manufactured plugs into the prepared recess; and they are placed in the prepared recess, in the following sequence - the first plug with the wide side up, the next plug is laid with the smaller side up, alternately changing the position of each next plug.

A distinctive feature of the invention is that only mechanical preparation of the pit is provided, into which a pre-prepared cork is glued, on the surface of the sides of which an adhesive layer is applied corresponding to the size of the pit. It is only necessary to warm up the surface of the cork and you can glue it into the hole, this eliminates the heating of the bottom of the potholes to a plastic state before laying the briquettes. EFFECT: invention makes it possible to quickly eliminate local pits after their detection on the road surface without using energy-intensive devices; to reduce the time of formation of the pavement while maintaining its transport, operational and strength indicators, to exclude additional consumption of bituminous materials, and to use less energy-intensive means of small mechanization for repair, excluding the use of heavy vibratory rollers, asphalt pavers and other machines used in the repair of road surfaces. All this reduces material and energy costs, reduces the cost of work, and is also aimed at improving the environmental situation.

FIG. 1 shows a truncated cone-shaped plug for patching a road surface according to the first option, general view.

FIG. 2 - the same, a plug for patching the road surface in the form of a truncated pyramid according to the second option, general view.

FIG. 3 shows a hole in the roadbed before repair, section, general view.

FIG. 4 shows a prepared hole in the roadway for installing a plug in it, general view

FIG. 5 shows a fragment of the repaired roadbed, general view.

Positions indicate: plug 1; hole 2; roadway 3; fossa 4; plug 5.

The plug 1 for patching the road surface 3 according to the first option is a prefabricated asphalt concrete round briquette in the form of a truncated cone, which is preliminarily manufactured at the factory, pressed at a high temperature, the dimensions of which are optimized for the dimensional range of diameters, widths and thickness; while in the body of the plug 1, vertical holes are made for hooks with anchors (not shown); the mating surface of the plug is dusted with a bitumen emulsion.

The plug 5 for patching the road surface 3 according to the second option is a prefabricated asphalt concrete briquette pressed at a high temperature in the form of a truncated pyramid, the dimensions of which are optimized for the size range of width and thickness; while in the body of the plug 5 vertical holes are made for engaging with anchors (not shown); the mating surface of the plug is dusted with a bitumen emulsion.

The essence of the proposed method lies in the fact that in the method of repairing the road surface 3, including the milling of old asphalt concrete in the places of its deformation and installation in the prepared recess of the previously manufactured plugs 1 and / or 5 at the factory.

The implementation of the proposed method is carried out using the means and materials at hand.

Light damage in the initial phase of the formation of a pit 4 on the surface of the roadway 3 is eliminated by preparing a blind hole with tapered edges (for example, with a screwdriver). The surface of the plug 1 is warmed up (for example, with a gas burner), then glued into the prepared hole 4. The repair of holes with large dimensions (areas) of surface damage is carried out in the following sequence. When the depth of the hole is greater than the thickness of the cork, soil (asphalt concrete) is poured into the hole. A blind hole of a certain depth (but to the border with the substrate) is milled (for example, with a hand tool), with conical edges for a certain diameter of the plug size 1. The plug surface is heated and then glued into a prepared hole 4.

For the repair of transverse cracks in the road, the roadway is prepared by milling a cutter with tapered edges for a certain standard size of the device. Then the surface of the plug 5 is heated and then glued into the previously prepared hole 4.

Possible way of stacking n - the number of pre-made plugs 5 in the prepared recess. In this case, the surfaces of the plugs are preheated, then they are placed in a prepared recess, the first plug with the wide side to the top, the next plug is placed with the smaller side to the top, alternately changing the position of each next plug.

The advantages of this technical solution are:

- prompt elimination of local pits on the roadway after its detection;

- there is no need to use means for heating and priming the surfaces of the local recess;

- ease of implementation, low material consumption and labor intensity.

An example of the use of plugs for patching the road surface.

The plug 5 for patching the road surface 3 can be used when laying a pedestrian crossing on the road. In this case, n is carried out - the number of pre-made plugs in the form of a truncated pyramid in a prepared recess. In this case, the surfaces of the plugs are preheated, then they are placed in the prepared recess, the first plug with the wide side up, the next plug is laid with the smaller side up, alternately changing the position of each next plug. Next, the surfaces of the laid plugs are painted alternately in black and white. Similarly, you can lay such plugs in any prepared recess.

The proposed method of road pavement repair allows to reduce the time of pavement formation while maintaining its transport, operational and strength indicators, to eliminate additional consumption of bituminous materials.

EFFECT: obtaining a smoother surface, increasing the strength and durability of the road section being repaired, reducing the cost and labor intensity of works on the repair of asphalt concrete pavements.

Claims (1)

A method for patching a road surface, including removing a defective part of the road to form a depression with a predetermined contour and size, plugging the depression with a preformed plug having a size and contour corresponding to the size of said depression, and the surface of the plug is heated before it is inserted into the depression on the road, characterized in that the removal of the defective part of the road is carried out by milling the old asphalt concrete in the places of its deformation, an asphalt concrete plug in the form of a truncated pyramid is placed in the prepared recess with preliminary spraying of the mating surfaces with bitumen emulsion, then the number of pre-made plugs is laid in the prepared recess; and they are placed in the prepared recess, in the following sequence - the first plug with the wide side up, the next plug is laid with the smaller side up, alternately changing the position of each next plug.

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