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Asphalt pavement crack sealing repair method

A repair method and asphalt pavement technology, applied in the field of sealants, can solve the problems of low initial strength, temperature sensitivity, easy aging, etc., and achieve the effects of low modulus, high elongation, and stable sealing effect

Inactive Publication Date: 2019-03-12
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because it is just another form of asphalt, it cannot get rid of a series of weaknesses of asphalt itself: easy aging, temperature sensitivity, low bond strength, poor flexibility, low initial strength, and the choice of emulsifier and construction equipment are expensive and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The asphalt pavement crack filling and repairing method of the present embodiment comprises the following steps: a. Carry out milling to the damaged pavement and form the milling groove, when the groove width is 1.3cm, the groove depth is 1.5cm, when the groove width is 3cm, The groove depth is 3cm;

[0017] b. Heat the damaged part of the pavement to 180°C with microwaves, so that the moisture and air in the cracks inside the milling groove will overflow, and fully dry the pavement with a steam pressure pump;

[0018] c. Inject the sealant into the joint filling tank through the joint filling machine, control the height of the filling layer to be about 0.3cm lower than the road surface, and after 3 hours, keep the temperature at 170°C, and then spray it with a spraying amount of 1.6kg / ㎡ SBS modified asphalt is evenly paved on the surface of the milling groove;

[0019] The sealant raw material includes the following components in parts by weight: 30 parts of epoxy res...

Embodiment 2

[0021] The asphalt pavement crack filling and repairing method of the present embodiment comprises the following steps: a. Carry out milling to the damaged pavement and form the milling groove, when the groove width is 3cm, the groove depth is 2.5cm, when the groove width is 6cm, the groove The depth is 5cm;

[0022] b. Use microwaves to heat the damaged part of the road surface to 200°C, so that the moisture and air in the cracks inside the milling groove will overflow, and fully dry the road surface with a steam pressure pump;

[0023] c. Inject the sealant into the joint filling tank through the joint filling machine, control the height of the filling layer to be about 0.3cm lower than the road surface, and after 4 hours, keep the temperature at 190°C, and then spray it with a spraying amount of 1.7kg / ㎡ SBS modified asphalt is evenly paved on the surface of the milling groove;

[0024] The sealant raw material includes the following components in parts by weight: 40 parts ...

Embodiment 3

[0026] The asphalt pavement crack filling and repairing method of the present embodiment comprises the following steps: a. Carry out milling to the damaged pavement and form the milling groove, when the groove width is 2cm, the groove depth is 2cm, when the groove width is 4cm, the groove depth 4cm;

[0027] b. Use microwaves to heat the damaged part of the road surface to 185°C, so that the moisture and air in the cracks inside the milling groove will overflow, and fully dry the road surface with a steam pressure pump;

[0028] c. Inject the sealant into the joint filling tank through the joint filling machine, control the height of the filling layer to be about 0.3cm lower than the road surface, and after 3.5 hours, keep the temperature at 180°C, and then spray it with a spraying amount of 1.6kg / ㎡ SBS modified asphalt is evenly paved on the surface of the milling groove;

[0029] The sealant raw material includes the following components in parts by weight: 30 parts of epox...

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Abstract

The invention discloses an asphalt pavement crack sealing repair method. The asphalt pavement crack sealing repair method comprises milling a damaged pavement to form milled grooves; heating the damaged parts of the damaged pavement through microwaves to dissipating moisture and air out of the inner cracks of the milled grooves, and sufficiently drying the pavement through a steam pressure pump; injecting sealant into crack filling grooves through a crack filling machine, and controlling the height of filling layers to be 0.3 cm lower than the pavement; 3-4 hours later, at a temperature of 170-190 DEG C, uniformly laying SBS (styrene butadiene styrene) modified asphalt onto the surfaces of the milled grooves. The sealant is prepared from raw materials including butyl glycol, n-butyl alcohol, methylacrylic acid, styrene, triethylene glycol dimethacrylate, poly-2, 6-dimethyl-1,4-diphenyl ether, polyvinyl acetate, dimethylethanolamine, alpha, omega-hydroxyl polydimethylsiloxane and nanosilicon dioxide; after being cooled down a normal-temperature or low-temperature state, the sealant can be high in elasticity; one year after the sealant is applied, sealing joints have no crack or falling-off and achieve stable sealing effects.

Description

technical field [0001] The invention relates to a sealant, in particular to a method for filling and repairing asphalt pavement cracks. Background technique [0002] Among the various damage forms of asphalt pavement, the two types of damage, cracks and potholes, account for the largest proportion and are the most common. Crack damage belongs to the structural damage of asphalt pavement, and more affects the durability of asphalt pavement. Pothole damage belongs to the functional damage of asphalt pavement, and more affects the performance of asphalt pavement. Crack filling and pit repair are two of the most common and difficult daily maintenance tasks in the maintenance department. The two most common daily maintenance tasks, crack filling and pit repair, have received extensive attention from relevant departments both at home and abroad. The crack filling treatment is mainly aimed at longitudinal cracks, transverse cracks, massive cracks and reflective cracks. The comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/09C09J4/06C09J11/04C09J11/06C09J11/08
CPCC09J4/06C09J11/04C09J11/06C09J11/08E01C23/096
Inventor 王羽咸淼刘丽
Owner CHONGQING JIAOTONG UNIVERSITY
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