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Pavement repairing structure and pavement repairing method

A technology for pavement repair and subgrade, which is applied in the direction of roads, roads, and pavement details, etc. It can solve the problems that affect the road surface condition, road driving comfort, low joint strength, and secondary damage, so as to improve traffic comfort and waterproof. Improvement of permeability and strength, compression resistance and durability

Pending Publication Date: 2022-08-05
湖南华泰泓湘工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When repairing the pavement with the above-mentioned conventional repair methods, in order to keep the strength of the repaired damaged position at a high level, the height of the pavement after repairing the damaged position is generally slightly higher than the original asphalt pavement, resulting in lower comfort for operation; and repairing The strength of the joint between the rear pavement and the original asphalt pavement is low, and it is prone to secondary damage, which affects the road surface condition and road driving comfort

Method used

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  • Pavement repairing structure and pavement repairing method
  • Pavement repairing structure and pavement repairing method
  • Pavement repairing structure and pavement repairing method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-3

[0045] With reference to the proportioning of table 1, make primer by the following method:

[0046] Slowly add the epoxy resin into the solvent under stirring, and continue stirring for 15 minutes after the addition to mix evenly. Then, under stirring, add the rheology aid and thickening agent in turn, and continue stirring for 20 minutes to completely mix well; take half of the original formula. Water is added to the aforementioned mixture, and the A component is obtained after stirring and mixing evenly;

[0047] Add the curing agent to the remaining half of the water and stir and mix evenly to prepare component B;

[0048] Before the primer is applied, add the B component to the A component and stir and mix evenly to prepare the primer.

[0049] Wherein, the curing agent is an aromatic amine curing agent; the solvent is dipropylene glycol methyl ether.

[0050] Table 1: Distribution ratio (%) of each component in Preparation Examples 1-3

[0051] water epo...

Embodiment 1

[0055] A pavement repair structure, refer to figure 1 , repair the pavement according to the following methods:

[0056] S1. Clean up the debris and accumulated water at the damaged position of the road surface, shovel off the excess asphalt concrete at the damaged position to expose the lower subgrade, cut the stubble of the original asphalt concrete pavement at the edge of the damaged position neatly, and then put concrete on the original asphalt pavement at the edge of the damaged position. The height of 3cm is removed by grinding down the layer to form a repair step, and the width of the repair step in the horizontal direction is 5cm;

[0057] S2. Evenly spray the primer prepared in Preparation Example 1 on the cleaned roadbed, control the coating thickness to be 2 mm, and then use 70°C air blowing to heat and cure to obtain the bottom layer 2;

[0058] S3. Pour the asphalt concrete on the surface of the bottom layer 2, and spread it to extend to the repair step, flatten ...

Embodiment 2

[0061] A pavement repair structure, the difference from Example 1 is that the primer is the primer prepared in Preparation Example 2, and the rest are consistent with Example 1.

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Abstract

The invention relates to a pavement repairing structure and a repairing method, and relates to the field of pavement repairing technologies, the pavement repairing structure comprises a bottom layer, a reinforcing layer and a finishing coat which are sequentially laminated from top to bottom; the bottom layer is prepared by coating a roadbed with a primer and curing the primer, and the primer comprises the following components in percentage by mass: 25-50% of water, 40-55% of epoxy resin, 5-15% of a curing agent, 1-5% of a solvent, 0.1-1% of a rheological additive and 0.1-1% of a thickening agent; the reinforcing layer is an asphalt concrete layer, the reinforcing layer extends to the periphery from the position to be repaired and covers the undamaged position of the original asphalt pavement, and the upper surface of the reinforcing layer does not exceed the original asphalt pavement; and the overlay layer covers the joint position of the reinforcing layer and the original asphalt pavement. According to the technical scheme, the mechanical strength, durability and traffic comfort degree of the repaired asphalt pavement can be effectively improved.

Description

technical field [0001] The present application relates to the field of road repair technology, and in particular, to a road surface repair structure and a road surface repair method. Background technique [0002] Asphalt pavement has high flatness, low driving noise and high driving comfort, and is widely used in highway engineering construction. However, after the asphalt pavement is opened to traffic, due to the influence of the traffic load and the natural environment, the pavement structural performance gradually deteriorates with the repeated action of the traffic load and the change of the environmental conditions, resulting in the deterioration of the road surface condition and the reduction of the road traffic service capacity. . The common forms of pavement damage mainly include subsidence, rutting, cracking, pushing, wrapping and low temperature shrinkage cracking. [0003] After the asphalt pavement is damaged, it will lead to the rapid deterioration of the pave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C11/02E01C11/00C09D163/00C09D5/00
CPCE01C7/187E01C11/02E01C11/005C09D163/00C09D5/002Y02A30/60
Inventor 周承淼韦章田浩杨玄
Owner 湖南华泰泓湘工程有限公司