RU2501903C1 - Method to repair asphalt-concrete surfaces - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method to repair asphalt-concrete surfaces of motor roads with cracks of temperature origin includes disassembly along the trajectory of cracks of the upper layer of the surface, preparation of the surface. At the same time additionally a clay and sand mortar is injected into the crack exactly up to the upper part of asphalt concrete, limiters of repair area width are installed, a softening compound is poured into the crack and the adjacent area, by pouring a dose necessary for the entire area of repair, the softened mass of asphalt concrete is pushed along the entire width of the repair area, the produced groove is filled with a quick-hardening compound, a polymer concrete beam is installed and fixed onto the quick-hardening compound so that the beam matches with the tracks, the joints are hydrophobisated with a wetting agent.

EFFECT: production of more even surface, increased strength and durability of a repaired section of a road, reduced cost and labour intensiveness of works for repair of asphalt-concrete surfaces.

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Description

The proposed method relates to the field of road construction and can be used in the reconstruction and repair of roads.

Known methods of construction and reconstruction of roads, in which repair of ruts, holes, cracks are used for milling (patent No. 2301292 C1, IPC E01C 7/18, E01C 21/00, 2007; No. 201010679 A, IPC E01C 7/00, 2011 g .; No. 2232841 C1, IPC E01C 7/18, 2004; No. 2365698 C1, IPC E01C 7/18, E01C 21/00, 2009).

The disadvantage of these solutions is the use of special milling machines, heating machines, high energy and labor costs.

The closest solution taken as a prototype is a method for repairing pavement RU, patent application 2004111580, IPC ⁷ Е01С 21/00, 2005, including a method for repairing asphalt concrete pavements of roads with cracks of temperature origin, including disassembling along the crack path of the top layer of the coating, foundation preparation.

This method does not allow to achieve the desired result in strengthening cracks of temperature origin, as it has a strong reaction to temperature fluctuations: the used bitumen-based mastic becomes softer, also melts at high temperatures and hardens to such an extent that it can crack.

The technical result of the proposed method is to obtain a more even surface, increase the strength and durability of the repaired section of the road, reduce the cost and complexity of the repair of asphalt concrete pavements.

The essence of the proposed method lies in the fact that for the repair of asphalt concrete coatings of roads with cracks of temperature origin, disassembly along the path of cracks of the upper coating layer, preparation of the base, then, according to the proposed method, the clay-sand mortar is pumped into the crack exactly to the upper part of the asphalt concrete, then the width limiters are installed areas of repair, in the crack and the area adjacent to it, fill the softening composition by filling the dose, it is necessary oh for the entire repair area and then forced a lot of softening asphalt concrete over the entire width of the repair to the height of polymer concrete beams fill the resulting ditch fast curing composition reinforce polymer concrete beam on the fast setting so that the beam coincides with the reel strips, water-repellent seams hydrophobizator.

This combination of new features with the known allows to simplify the equipment in comparison with the prototype, because it becomes unnecessary to use two types of mastic, to sprinkle seeding fractions of 4-5 mm from solid gravel, to arrange an artificial crack in the layer of repair material in the process of compaction.

The proposed method for repairing asphalt pavements is illustrated by drawings.

Figure 1 shows a crack on the road.

Figure 2 shows the process of preparation and laying of polymer concrete beams, where 1 is clay-sand mortar, 2 - limiters of the repair area, 3 - softening composition, 4 - burst area, 5 - quick-hardening composition, 6 - polymer concrete beam, 7 - water repellent, N - thickness of asphalt concrete.

Figure 3 shows a polymer concrete beam with dimensions b = l / 4h ± 20 mm, h = l / 2H ± 20 mm, L = 3000 mm.

The method is as follows: the clay-sand mortar is pumped into the crack exactly to the top of the asphalt concrete, the width of the repair area is set in the form of rubber bands with the lower adhesive side, and glued to the prepared asphalt concrete. Along the width of the crack and the area adjacent to it, pour softening fluid based on organic and organopolymer solvents by pouring the required dose for the entire area of repair. After that, the weakened mass of asphalt concrete is pushed across the entire width of the repair area, and the formed ditch is filled with quick-hardening polymer concrete composition. The polymer concrete beam is installed on the quick-hardening composition so that it coincides with the run-up strip, after which the joints are hydrophobized with a gibrofobizator.

Example

To implement the method, a ready-made polymer concrete beam was taken, depending on the road section being repaired and the crack size, the size of the polymer concrete beam is b = 1 / 4h ± 20 mm, h = l / 2H ± 20 mm, L = 3000 mm, where N is the thickness of the road asphalt concrete canvas (see figure 2).

First, the clay-sand mortar was pumped into the crack exactly to the top of the asphalt concrete, the width of the repair area was set in the form of rubber bands with the lower adhesive side, and glued to the prepared asphalt concrete. Softening fluid based on organic and organopolymer solvents was poured along the width of the crack and the area adjacent to it by pouring the necessary dose for the entire repair area. After that, the softened mass of asphalt concrete was pressed across the entire width of the repair area, and the formed ditch was filled with quick-hardening polymer concrete composition. The installation of the polymer concrete beam on the quick-hardening composition, so that it coincided with the runway, was carried out in two versions. Option 1: polymer concrete beam was laid on surface A (see figure 3). Option 2: if the size of the crack is larger than surface A, then the polymer concrete beam was laid on surface B (see Fig. 3). At the same time, at a distance of 30-50 mm from the ends of the beam, it is necessary to make holes with a diameter of 10-12 mm for reinforcing the beam with reinforcement, which was hammered to a depth of 2H, where H is the thickness of the asphalt concrete roadbed (see figure 2), after which the joints are hydrophobized gibrofobizatorom.

The proposed method provides a technical effect and can be carried out using means known in the art.

Claims (1)

A method of repairing asphalt concrete pavements of roads with cracks of temperature origin, including disassembling along the crack path of the top layer of the coating, preparing the base, characterized in that the clay sand mortar is additionally pumped into the crack exactly to the top of the asphalt concrete, the width of the repair region is set in the crack and the region, adjacent to it, pour the softening composition by pouring the dose necessary for the entire area of repair, push the softened mass of asphalt tones across the entire width of the repair area, fill the formed ditch with a quick-hardening composition, install and strengthen the polymer-concrete beam on the quick-hardening composition so that the beam coincides with the run-up strips, the joints are water-repellent with a water repellent.

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