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Durable ultrathin wearing layer and preparation method thereof

A wear layer, ultra-thin technology, applied in adhesive types, building components, asphalt material adhesives, etc., can solve the problem of limited interlayer adhesion and durability modification, affecting road surface skid resistance and driving comfort , affecting comprehensive road performance and other issues, to achieve the effect of improving road performance, reducing mixing difficulty and construction difficulty, and improving anti-aging effect

Active Publication Date: 2021-08-27
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the adhesion between the ultra-thin wear-resistant layer and the original road surface is insufficient, after a large number of driving loads, defects such as waves, displacements, and rutting will occur, which will affect the road surface slip resistance and driving comfort, and threaten driving safety
The interlayer adhesion and durability modification of the existing ultra-thin wear layer is limited, which affects the comprehensive road performance; therefore, it is necessary to further explore and optimize the ultra-thin wear layer with good high and low temperature performance, road performance and durability Asphalt mixture has important research and application significance

Method used

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  • Durable ultrathin wearing layer and preparation method thereof
  • Durable ultrathin wearing layer and preparation method thereof
  • Durable ultrathin wearing layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A durable ultra-thin wear layer, comprising a bonding layer and an ultra-thin surface layer, the preparation method of which comprises the following steps:

[0057] 1) Carry out cleaning and disease pretreatment on the original pavement where a thin wearing layer needs to be laid;

[0058] 2) Sprinkle 0.8L / m on the original road surface at room temperature, meet the construction conditions, and in non-rainy conditions 2 The composite modified emulsified asphalt, spray 0.7L / m after demulsification (25min) 2 Calcium hydroxide solution (mass concentration of calcium ion is 0.15%), forms bonding layer;

[0059] 3) Prepare ultra-thin surface layer asphalt mixture, each component and its dosage include: composite modified asphalt 7%, coarse aggregate (basalt) 66.5%, fine aggregate (diabase rock chips) 23.5%, filler 3% (1% montmorillonite, 2% diatomite); mix the weighed raw materials at 170°C to obtain the ultra-thin surface layer asphalt mixture;

[0060] 4) spreading the ...

Embodiment 2

[0062] A durable ultra-thin wear layer, comprising a bonding layer and an ultra-thin surface layer, the preparation method of which comprises the following steps:

[0063] 1) Carry out cleaning and disease pretreatment on the original pavement where a thin wearing layer needs to be laid;

[0064] 2) Sprinkle 0.6L / m on the original road surface at room temperature, meet the construction conditions, and in non-rainy conditions 2 The composite modified emulsified asphalt, spray 0.5L / m after 20min after demulsification 2 A barium hydroxide solution (the mass concentration of barium ions is 0.15%) to form a bonding layer;

[0065] 3) Prepare ultra-thin surface layer asphalt mixture, each component and its dosage include: composite modified asphalt 7%, coarse aggregate (basalt) 66.5%, fine aggregate (diabase rock chips) 23.5%, filler 3% (1% montmorillonite, 2% diatomite); mix the weighed raw materials at 170°C to obtain the ultra-thin surface layer asphalt mixture;

[0066] 4) sp...

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Abstract

The invention discloses a durable ultrathin wearing layer which comprises an ultrathin surface layer and a bonding layer; the ultrathin surface layer comprises, by mass, 63-72% of coarse aggregate, 20-28% of fine aggregate, 2-4% of filler and 6-8% of composite modified asphalt; the durable ultrathin wearing layer has the two characteristics that the dynamic viscosity of the composite modified asphalt at 60 DEG C is larger than or equal to 50000 Pa.s and the rotary viscosity of the composite modified asphalt at 135 DEG C is smaller than or equal to 3 Pa.s; and the composite modified emulsified asphalt is prepared by emulsifying the composite modified asphalt. The ultrathin wearing layer asphalt mixture provided by the invention is easy to mix, is tightly bonded with a lower structural layer, has excellent characteristics of good construction workability, good pavement performance, good durability and the like, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of road building materials, and in particular relates to a durable ultra-thin wear layer and a preparation method thereof. Background technique [0002] With the continuous growth of our country's economy and the acceleration of urbanization, China's civil road transportation has achieved rapid development, which has a positive impact on the national economy. However, due to long-term overload use, after 3 to 5 years, many roads will have diseases such as cracking, loosening, deformation, etc., which will greatly weaken the performance of the road surface, such as water damage resistance, high temperature stability and skid resistance Wait. These diseases will not only shorten the service life of the road, but also pose a serious threat to driving comfort and safety. In order to reduce the occurrence of these pavement diseases, preventive pavement maintenance technology has been paid more and more attentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C08L95/00C08L51/04C08L91/00C08K3/06C08K5/14C09J195/00C09J11/08C09J11/04C09J11/06C08F279/02C08F222/06C08F8/14C04B111/20
CPCC04B26/26C08L95/00C09J195/005C09J11/08C09J11/04C09J11/06C08F279/02C08F8/14C08L2205/03C08L2205/08C04B2201/50C04B2111/0075C04B2111/2038C08L51/04C08L91/00C08K3/06C08K5/14C08F222/06C04B24/2664C04B2103/0068C04B14/14C04B14/10C04B14/104C04B14/08Y02A30/60
Inventor 王洪伟肖铭钊黄绍龙郭鹏匡罗飞蔡祥丁帆虞刚别璐胡睿
Owner WUHAN MUNICIPAL CONSTR GROUP