UA21136U - Method for repair of road asphalt-concrete pavements - Google Patents

Abstract

Method for repair of road asphalt-concrete pavements includes cutting vertical seams, removal of destructed material, cutting slot in side walls of pot-hole, treatment of pot-hole surface and slot with binding material, laying repair mix and compacting it. The slot is arranged V-like with top at the middle of coating and with depth equal to half of its thickness.

Description

Description of the invention

The useful model refers to the operational maintenance of highways, and can also be used in the repair of airfields and asphalt concrete coverings over various engineering communications.

In the repair of asphalt concrete road surfaces, the following are used: pneumatic stations with pneumatic hammers, installations for cutting asphalt concrete, rollers for compacting the asphalt concrete mixture.

A known method of repair, according to which the edges are treated with a pneumatic hammer and cut with a disc cutter perpendicular to the road surface of the repaired section on a road surface made of hot 70 (warm or cold) asphalt concrete, followed by filling the prepared section with hot asphalt concrete mixture and its compaction (a.s. of the USSR Mo837993, IPC EO1C23/06, 1981, BI Mo221.

The disadvantage of the known method is that it does not allow obtaining sufficient strength of the repaired area during further operation of the road surface. Also, the possibility of delamination of the reproduced coating is not excluded. 12 The closest technical solution is the method of repairing road asphalt concrete surfaces (a.s. of the USSR

Мо1562377, МПК ЕО1С23/06, 1990, БИ Мо17), which includes cutting the edges of the repaired area with an asphalt concrete cutting machine equipped with a cutting device, such as a diamond disc. At the same time, edges located perpendicular to the axis of the road are performed with an inclination of their cutting plane to the middle part of the repaired section at an angle to the vertical, determined from the dependence of кс ес -5агсзитТЙ-Ш - - 5 Ж- - 2 5 - а А - А - (Е- Вксово )i (ek - Vk vipr"

Кк Гй sж к зИПе where К is a coefficient that takes into account the adhesion of asphalt concrete grains;

C - adhesion strength of the asphalt concrete layer, MPa; -

Y - static coefficient of friction, 150.7;

KK - load on the coating from the wheels of the vehicle, MPa; f- The angle of deviation from the vertical of the equivalent vertical and tangential loads; с зо Kozh - compressive strength limit of asphalt concrete, MPa.

The disadvantage of the known method is as follows. The edges of the pothole, made with the inclination of their cutting plane to i) the middle part of the pothole at an angle to the vertical, allow you to distribute vertical loads on the side "- edges from the wheels of the rolling stock, but when the load is removed, the base under the pothole is restored and the applied asphalt concrete is peeled off. Exfoliation of asphalt concrete is also caused by a change in the external temperature due to the convergence (distance) of the edges of the potholes being repaired. high school

The useful model is based on the task of eliminating delamination of the repaired asphalt concrete mix, increasing the service life of the repaired area. When exposing the road surface above engineering communications, it is possible to obtain asphalt concrete blocks suitable for further use. The technical result consists in increasing the strength of the repair, eliminating the delamination of the repaired asphalt-concrete "0" boom. An M-shaped groove with an angle at the top of 902 provides equivalent compressive strength of the coating and /-5)

Gashi gap.

The task is solved by the fact that the method of repairing asphalt concrete road surfaces, which includes cutting vertical seams, removing destroyed material, cutting a groove in the side edges of the pothole, treating the surface of the pothole and the groove with binding material, laying the repair mixture and its compaction and, according to useful model, perform an M-shaped groove with a peak in the middle of the coating and a depth equal to half of its thickness. When repairing road asphalt surfaces above engineering communications, vertical seams are cut with a grid. - The method is carried out as follows. The edges of the pothole are cut vertically with a betor cutter, the destroyed material is removed, a groove is cut in the side edges with the top in the middle of the coating (Fig. 1), the bottom and groove of the pothole are treated for 5 years with binding materials, followed by the filling of the prepared pothole with a hot asphalt concrete mixture and its compaction

Ф Execution of an M-shaped groove with a peak in the middle of the coating and a depth equal to half of it ensures obtaining an angle at the top of 902. This angle allows to ensure compressive and tear strength.

The proposed method can be used in the repair of airfields and coverings over various engineering communications made of asphalt concrete, but in this case a grid of vertical seams is cut with a given pitch to obtain asphalt concrete blocks and their reuse. c Fig. 1 shows the method of making a groove in the road surface with a motorized concrete cutter (Н - thickness of the road surface, IN/2 - depth of the groove).

Figure 2 shows the action of forces from the wheels of the vehicle. 60 Fig. 3 shows the action of reactive forces.

Example. The pothole measures 1.2x0.6x0.2 (length x width x depth). The edges of the repair area are trimmed along the outer contour, vertical seams are cut with a manual concrete cutter equipped with a diamond disc for cutting asphalt concrete, the damaged asphalt concrete is removed and an M-shaped groove measuring 0.2x0.1 (thickness x depth) is selected in the side edges of the pothole. Then they fill the pothole with base material, 65 compact it with a tamping tool, treat the surface of the pothole and the grooves of the edges with liquid bitumen, lay the asphalt concrete mixture in the pothole (trench), plan and compact it with a drum roller.

In case of repair of road surfaces over utilities, contouring of the repaired area is carried out, cutting of the grid from vertical seams along utility utilities, destroyed material and insulation material are removed, a groove is selected in the side edges with a peak in the middle of the coating and a depth equal to half its thickness (Fig. 1), remove the destroyed material, treat the groove with binding materials and fill the prepared trench with an asphalt concrete mixture and compact it.

The use of the proposed method for the repair of road surfaces provides a reduction of 3095 repeated destructions on the repaired surfaces. Compared to the existing methods, it has the following advantages: 1. making a groove in the side edges allows you to perceive the load from the wheels of transport and from reactive /0 beams of the base without peeling off the repaired asphalt concrete mixture and increases the service life of the repaired part of the road surface; 2. when laying the road surface over engineering communications, by cutting a grid from vertical seams, asphalt concrete blocks suitable for further use can be obtained.

Claims (2)

19 Formula of the invention 1. The method of repairing asphalt concrete road surfaces, which includes cutting vertical seams, removing destroyed material, cutting a groove in the side edges of the pothole, treating the surface of the pothole and the groove with binding material, laying the repair mixture and its compaction, which is distinguished by the fact that M- a similar groove with a peak in the middle of the coating and a depth equal to half its thickness. 2. The method of repairing asphalt concrete road surfaces according to claim 1, which differs in that vertical seams are cut with a grid. that with (Se) (ze) "- "- s - i" ime) - - (95) 4) 60 b5