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A Construction Technology of Composite Road Maintenance Overlay

A technology of road maintenance and construction technology, which is applied in the direction of roads, roads, road repairs, etc., can solve problems such as the inability to prevent and delay the reflective cracks on the original road surface, the inability to achieve rapid maintenance, serious pollution and safety, and achieve the goal of not easy to delaminate and fall off, Stable structure and wide application range

Active Publication Date: 2022-02-18
西安嘉程建设科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the process, the effect of rapid maintenance cannot be achieved, and the seal layers laid twice are independent of each other and cannot form a whole, resulting in poor structural stability, which cannot prevent and delay the reflective cracks on the original road surface; During the process of open traffic, there are floating gravel when the vehicle is driving, which not only causes serious pollution but also has low safety. It can only be limited to special remote areas and is not suitable for expressways and urban roads.

Method used

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  • A Construction Technology of Composite Road Maintenance Overlay
  • A Construction Technology of Composite Road Maintenance Overlay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Close the construction road to traffic, pre-treat the original road surface disease, and plan and roughen the original road surface. Sprinkle a layer of modified asphalt gravel seal (the gravel has been pre-treated), and after the gravel seal is spread, roll it three times with a 6-ton rubber-tyred road roller, so that at least 1 / 2 of the gravel is embedded in the modified asphalt. Use a gravel sweeper to clean the pumice 3 times; spread a layer of emulsified asphalt mixture with a slurry sealer, and after the emulsified asphalt mixture breaks, that is, 1 hour after the emulsified asphalt mixture is paved, Use a 6-ton steel wheel roller to roll the road twice and then open it to traffic.

[0048] The pretreatment of the disease on the original pavement is specifically: digging and repairing the pits, and filling the cracks exceeding 2cm.

[0049] The modified asphalt is SBS rubber powder composite modified high viscosity and high elastic asphalt, the spraying amount of...

Embodiment 2

[0053] Close the construction road to traffic, pre-treat the original road surface disease, and plan and roughen the original road surface. Spread 1 layer of modified asphalt gravel seal (the gravel has been pre-treated). After the gravel seal is sprayed, roll it 5 times with a 6-ton rubber roller, so that at least 1 / 2 of the stone is embedded in the rubber powder modified asphalt . Use a gravel sweeper to clean the pumice 3 times; spread a layer of emulsified asphalt mixture with a slurry sealer, and after the emulsified asphalt mixture breaks, that is, 1 hour after the emulsified asphalt mixture is paved, Use a 6-ton steel wheel roller to roll the road surface three times and then open it to traffic.

[0054] The pretreatment of the original pavement disease is as follows: the pits are excavated and repaired, and the cracks exceeding 2cm are filled with cracks.

[0055] The modified asphalt is SBS modified high-viscosity and high-elasticity asphalt, and the spraying amount...

Embodiment 3

[0059] Close the construction road to traffic, pre-treat the original road surface disease, and plan and roughen the original road surface. Sprinkle a layer of modified asphalt gravel seal (the gravel has been pre-treated), and after the gravel seal is spread, roll it three times with a 6-ton rubber-tyred road roller, so that at least 1 / 2 of the gravel is embedded in the modified asphalt. Use a gravel sweeper to clean the pumice 4 times; spread a layer of emulsified asphalt mixture with a slurry sealer, and wait for the emulsified asphalt mixture to break, that is, 1 hour after the emulsified asphalt mixture is paved. Use a 6-ton steel wheel roller to roll the road twice and then open it to traffic.

[0060] The pretreatment of the disease on the original road surface is specifically: the pits are excavated and repaired, and the cracks exceeding 2cm are treated with joint filling.

[0061] The modified asphalt is SBS rubber powder compound modified high viscosity and high ela...

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Abstract

The invention provides a novel composite road maintenance overlay construction process, comprising the following steps: step 1, pretreating the original road surface; step 2, spreading a layer of modified asphalt gravel seal layer on the road surface; step 3 , and then immediately use a rubber-tyred road roller for rolling; step 4, after the rolling is completed, another layer of emulsified asphalt mixture is spread on the surface and rolled, and the traffic is opened after the rolling is completed. The present invention does not need to be open to traffic, so it has a wide application range and can be constructed on urban roads and expressways. On the other hand, the upper and lower layers can be well combined to form a whole, and the structure is more stable. After a long time of use, it is not easy to delaminate and fall off, and it is not easy to break. Conservation cannot handle reflective cracks.

Description

technical field [0001] The invention relates to the field of road maintenance, in particular to a construction process for a composite road maintenance overlay. Background technique [0002] Several years after the highway was opened to traffic, due to the effects of temperature, rain, sunshine, vehicle load, etc., the structural strength and driving comfort of the pavement have been reduced year by year, and the asphalt binder on the surface has aged, fatigue cracks, reflection cracks, potholes, and surface blocks. Shedding and other diseases. Among them, the cracks cause the loss of the waterproof function of the road surface, and the water on the road surface enters the pavement base layer through the cracks, causing serious damage to the pavement structure. Therefore, road maintenance is very important for the treatment of cracks. [0003] At present, the mainstream road maintenance plan is Cape seal. The Cape seal process is to spray conventional asphalt gravel seal, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C19/48E01C19/23E01C7/18E01C7/24E01C7/26
CPCE01C19/4826E01C19/231E01C7/185E01C7/24E01C7/262
Inventor 师永涛
Owner 西安嘉程建设科技有限公司
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