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Multifunctional active composite seal coat pavement

A composite sealing layer and multi-functional technology, which is applied to cohesive pavement paved on site, roads, roads, etc., can solve the problems of high cost, poor environmental protection, difficult construction, etc., and achieve the effect of resisting reflection cracks

Pending Publication Date: 2020-05-19
CHANGAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent No. (Application No. 201010567413.X) discloses a mist seal layer asphalt emulsion admixture and its use method. The asphalt emulsion admixture has a regeneration function, but the skid resistance drops rapidly when added to the mist seal layer
Chinese Patent No. (Application No. 201720420021.8) discloses a crack-resistant rubber asphalt composite seal. The composite seal includes at least two single-size crushed stone layers. There is a rubber asphalt seal between the two gravel layers, and a rubber asphalt seal between the bottom gravel layer and the asphalt pavement. The rubber asphalt of this method has good low temperature performance and can resist reflection cracks, but The spreading temperature of rubber asphalt is between 180°C and 190°C, the construction is difficult, and the rubber asphalt is easy to segregate, so it needs to be prepared as needed
Chinese Patent No. (Application No. 201510231122.6) discloses the method of pre-maintenance test road capping layer, using SBS rubber double-modified asphalt gravel sealing layer as the lower bearing layer, and the micro-surface is the surface layer, which has excellent skid resistance and water sealing effect, but the preparation procedure of double modified asphalt is complicated, the temperature is high, the environmental protection is poor, the construction is difficult, and the cost is high

Method used

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  • Multifunctional active composite seal coat pavement
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  • Multifunctional active composite seal coat pavement

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation process of active emulsified asphalt is:

[0039] 1) Prepare modified emulsified asphalt;

[0040] Add asphalt emulsifier into water at 40°C-70°C, adjust the pH value to 1.5-2.5 with hydrochloric acid, and stir evenly, then add modifier and stabilizer to obtain emulsifier aqueous solution, and then heat the base or modified asphalt to 110°C-155°C, then add it into the colloid mill together with the emulsifier aqueous solution, and emulsify for 1min-2min to obtain modified emulsified asphalt;

[0041] 2) Active agent preparation process;

[0042] Mix the aged asphalt repair agent and repair aid, and then stir at 50°C-60°C for 20min-30min, and rise to the test temperature within 10min to obtain the aged asphalt repair emulsifier, and then dissolve the aged asphalt repair emulsifier in In hot water, get an aqueous solution, stir evenly, let it cool down to the test temperature within 5 minutes, then place the aqueous solution in a water bath at 50°C-80°C ...

Embodiment 1

[0056] The multifunctional active composite sealing layer pavement according to the present invention is the original pavement, the active emulsified asphalt layer 2, the first gravel layer 3, the modified emulsified asphalt layer, the second gravel layer 3, the emulsified asphalt layer from bottom to top. Composed of asphalt bonding layer 6 and anti-skid and noise-reducing micro-surface layer.

[0057] The active emulsified asphalt layer 2 is composed of 85% by mass of modified emulsified asphalt and 15% of active agent.

[0058] The mass ratio of each material of the modified emulsified asphalt is 0.4% of asphalt emulsifier, 0.5% of hydrochloric acid, 4.0% of SBR modifier, 67% of base asphalt, 0.3% of stabilizer, and 27.8% of water. The preparation includes the following steps:

[0059] Add LT-CK1 cationic fast-cracking emulsifier into water at 50°C-55°C, adjust the pH value to 1.5-2.5 with hydrochloric acid, and stir well to obtain an emulsifier aqueous solution; heat SK90#...

Embodiment 2

[0075] The multifunctional active composite sealing layer pavement of the present invention comprises a six-layer structure, including the original pavement, the active emulsified asphalt layer 2, the first crushed stone layer 3, the modified asphalt layer, the second crushed stone layer 3 and the fog sealing layer.

[0076] The active emulsified asphalt layer 2 is composed of 95% by mass of modified emulsified asphalt and 5% of active agent.

[0077] The mass ratio of each material of modified emulsified asphalt is: 0.4% of asphalt emulsifier, 0.5% of hydrochloric acid, 4.0% of SBR modifier, 67% of base asphalt, and 28.1% of water. The preparation includes the following steps:

[0078] Add CK-60 cationic fast-cracking asphalt emulsifier into water at 60°C to 65°C, adjust the pH value to 1.8 to 2.3 with hydrochloric acid, and stir well to obtain an aqueous emulsifier solution; heat SK90# base asphalt to 135°C, and heat the heated base Asphalt, emulsifier aqueous solution and S...

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Abstract

The invention discloses a multifunctional active composite seal coat pavement. The multifunctional active composite seal coat pavement comprises an asphalt pavement, a self-repairing sealing layer anda surface layer which are sequentially distributed from bottom to top, wherein the surface layer is a fog sealing layer or an anti-skid noise reduction micro-surfacing layer; the self-repairing sealing layer comprises an active emulsified asphalt layer, a plurality of gravel layers and an emulsified asphalt bonding layer which are sequentially distributed from bottom to top, a modified emulsifiedasphalt layer or a modified asphalt layer is arranged between every two adjacent gravel layers, and the pavement has the advantages of being high in skid resistance, good in abrasion resistance, lowin cost and short in service life and is simple in construction process.

Description

technical field [0001] The invention belongs to the field of pavement maintenance materials and technology, and relates to a multifunctional active composite sealing layer pavement. Background technique [0002] my country's expressways have entered the maintenance stage, and various preventive maintenance measures have been applied. The maintenance methods such as reducing agent seal, asphalt regeneration, and fog seal with reducing function have the advantages of simple construction and rapid opening of traffic, but these maintenance measures are thin-layer structures with low skid resistance and short life. Its skid resistance can be improved in the early stage of use, but its wear resistance is poor and the cost is high. Gravel seal, ultra-thin wear layer, slurry seal and micro-surfacing can effectively improve the anti-slip performance of the pavement and improve the waterproof performance. It can only be used on roads with slight pavement diseases and does not have re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C11/00E01C7/32C08L95/00C08L9/08C08L1/28C08L29/04C08K3/16C08K3/22
CPCE01C11/005E01C7/32C08K3/22C08L95/005C08K2003/2241C08K2201/011C08L2205/035C08K2003/162C08L95/00C08L9/08C08L1/286C08L29/04C08K3/16
Inventor 郑木莲吴淑娟张西斌李洪印张文武刘伟王飞王军
Owner CHANGAN UNIV
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