Fast repairing method for asphalt concrete pavement

A technology of asphalt concrete and repair method, which is applied in road repair, cohesive pavement paved on site, road, etc. It can solve the problems of no bonding effect, low pavement strength, and late pavement opening, and achieve short maintenance time, The effect of low traffic impact and simple mixing

Inactive Publication Date: 2014-06-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Just after the emulsified asphalt concrete is rolled during construction, the asphalt particles in the emulsion only absorb and coalesce without exerting a bonding effect, and there is a certain amount of water in it, so the pavement strength is relatively low, and the pavement is opened later

Method used

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  • Fast repairing method for asphalt concrete pavement

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Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: A quick repair method for asphalt concrete pavement adopts the following mass proportions: gravel with a particle size of 5-10mm: 22 parts; crushed stone with a particle size of 11-16mm: 27 parts; Stone chips: 27 parts; medium sand: 9 parts; mineral powder: 10 parts; magnesium phosphate cement: 5 parts; emulsified asphalt is added according to the oil-stone ratio of 6% (the oil content of emulsified asphalt is 60%); the magnesium phosphate cement is made of Ammonium dihydrogen phosphate, magnesium oxide (with a specific surface area of ​​300m 2 / kg of magnesia), borax in a mass ratio of 1:2:0.15; when repairing the pavement, first mix the above-mentioned mass parts of gravel, stone chips, medium sand, mineral powder and emulsified asphalt, and then add magnesium phosphate Continue to stir the cement. After stirring evenly, pour the mixture onto the cleaned and damaged road surface. After paving and compacting, it can be cured for 3 hours.

[0015] The spe...

Embodiment 2

[0016] Embodiment 2, this specific embodiment and specific embodiment 1 are only different in proportion of the following materials, and the rest are the same. In this specific embodiment, the proportion of materials used is: gravel with a particle size of 5-10mm: 22 parts; crushed stone with a particle size of 11-16mm: 27 parts; stone chips with a particle size less than 5mm: 27 parts; : 9 parts; mineral powder: 5 parts; magnesium phosphate cement: 10 parts; emulsified asphalt is added according to the oil-stone ratio of 6%. When this specific embodiment is implemented, the road surface can be opened to traffic after 2 hours of maintenance.

Embodiment 3

[0017] Embodiment 3, this specific embodiment and specific embodiment 1 are only different in proportion of the following materials, and the rest are the same. In this specific embodiment, the proportion of materials used is: gravel with a particle size of 5-10mm: 22 parts; crushed stone with a particle size of 11-16mm: 27 parts; stone chips with a particle size less than 5mm: 27 parts; : 9 parts; mineral powder: 0 parts; magnesium phosphate cement: 15 parts; emulsified asphalt is added according to the oil-stone ratio of 6%. When this specific embodiment is implemented, the road surface can be opened to traffic after 1.5 hours of maintenance.

[0018] In order to further verify the effect of the present invention, the applicant used the material of the present invention to mix and stir evenly with the above-mentioned different proportions, and then directly poured it into a mold to test its solidification and hardening time and its bonding strength. At the same time, the set...

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Abstract

The invention discloses a fast repairing method for an asphalt concrete pavement. The method adopts the following materials by weight part: 1 to 40 parts of magnesium phosphate cement; 10 to 30 parts of rubble with particle sizes ranging from 5 to 10 mm; 20 to 40 parts of rubble with particle sizes ranging from 11 to 16 mm; 20 to 50 parts of stone chips with particle sizes smaller than 5 mm; 5 to 15 parts of medium sand; 0 to 10 parts of mineral powder; and emulsified asphalt added according to 4 to 10 percent of bitumen-aggregate ratio. After being stirred uniformly, all the materials are poured to the damaged pavement which is cleaned; and when the materials are tamped and flattened, the damaged pavement is only maintained for about 3 hours. As the method adopts the pouring forming method in the practical application, and no stirring equipment and no construction equipment are required during the application process, the method has the advantages that the construction is convenient; the maintenance time is short; the impact on transportation is low; and application requirements on both mechanical property and lasting quality can be met. The method is particularly suitable for the fast repairing of the asphalt concrete pavement, and also can be used in small-area of asphalt concrete engineering requiring cold construction.

Description

technical field [0001] The invention relates to a pavement repairing material, especially for quick repair of asphalt concrete pavement. Background technique [0002] Asphalt concrete pavement is the main pavement type of high-grade highways in the world at present. Asphalt concrete pavement has the advantages of smooth surface, no joints, small vibration, low noise, comfortable driving, and convenient maintenance and repair. However, affected by the quality of domestic asphalt itself, the strength and stability of pavement in my country are greatly affected by temperature, and the pavement is easily damaged. If the damaged area of ​​the pavement is relatively small, hot mix asphalt will be used, but the workload of using hot mix asphalt is relatively large, and at the same time, due to the need for heating during the use of hot mix asphalt, it does not meet the requirements of low-carbon economy. Now small-scale asphalt concrete road repair mainly adopts emulsified asphal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/26E01C19/10
Inventor 钱觉时吴洲马英王庆珍苏柳铭尤超裴妍杨之赟
Owner CHONGQING UNIV
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