Composite pavement sealing layer and preparation method and application thereof

A pavement and surface layer technology, applied in the field of pavement composite seal and its preparation, can solve the problems of high cost, demanding construction conditions, and unsatisfactory waterproof effect

Active Publication Date: 2019-01-04
北京路凯泰公路养护工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many types of preventive maintenance processes widely used on road surfaces, such as ultra-thin wear course, hot asphalt paving, slurry...

Method used

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  • Composite pavement sealing layer and preparation method and application thereof
  • Composite pavement sealing layer and preparation method and application thereof

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preparation example Construction

[0045] The present invention provides the preparation method of the pavement composite sealing layer described in the above technical solution, comprising the following steps:

[0046] (1) spreading the normal temperature modified asphalt mixture on the surface of the road to be treated, forming the bottom layer on the surface of the road to be treated;

[0047] (2) Spraying the sand-mist sealing layer mixture on the surface of the bottom layer to form a surface layer on the surface of the bottom layer to obtain a pavement composite sealing layer.

[0048] In the invention, the normal temperature modified asphalt mixture is spread on the surface of the road to be treated, and the bottom layer is formed on the surface of the road to be treated.

[0049] In the present invention, the mixing method of the normal temperature modified asphalt mixture preferably includes the following steps:

[0050] (1) asphalt is mixed with an asphalt modifier to obtain modified asphalt;

[0051...

Embodiment 1

[0076] In terms of parts by mass, heat 4.5 parts of 70﹟ road petroleum asphalt to 120 ° C, after it is completely melted, add 0.4 parts of methyl styrene block copolymer, and mix well to obtain modified asphalt; 60 parts of aggregates with a particle size of 6-10mm, 6 parts of aggregates with a particle size of 3-6mm, 28 parts of aggregates with a particle size of 0.075-3mm, and 6 parts of aggregates with a particle size below 0.075mm. Add 95.1 parts of the mixed basalt aggregate to the asphalt concrete mixing equipment, and mix at 120°C for 8s; inject the modified asphalt into the mixed basalt aggregate, continue to mix at 125°C for 35s, and control the discharge temperature to 125°C °C to obtain normal temperature modified asphalt mixture.

[0077] Put the obtained normal temperature modified asphalt mixture into the ordinary paver, spread the normal temperature modified asphalt mixture on the road surface at an ambient temperature of 30°C, and roll it to form a bottom layer...

Embodiment 2

[0082] In terms of parts by mass, heat 4.6 parts of 90﹟ road petroleum asphalt to 110 ° C, after it is completely melted, add 0.5 parts of methyl styrene block copolymer, and mix well to obtain modified asphalt; 60 parts of aggregates with a particle size of 6-10mm, 6 parts of aggregates with a particle size of 3-6mm, 28 parts of aggregates with a particle size of 0.075-3mm, and 6 parts of aggregates with a particle size below 0.075mm. Add 94.9 parts of mixed basalt aggregates to the asphalt concrete mixing equipment, and mix at 125°C for 8s; inject the modified asphalt into the mixed basalt aggregates, continue to mix at 130°C for 36s, and control the discharge temperature to 130°C to obtain room temperature modified asphalt mixture.

[0083] Put the obtained normal temperature modified asphalt mixture into the ordinary paver, spread the normal temperature modified asphalt mixture on the road surface at an ambient temperature of 40°C, and roll it to form a bottom layer on the...

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Abstract

The invention provides a composite pavement sealing layer and a preparation method and application thereof and belongs to the technical field of road maintenance. The composite pavement sealing layerprovided by the invention comprises a bottom layer arranged on the surface of a to-be-treated road and a surface layer arranged on the surface of the bottom layer, wherein the bottom layer is formed by a normal temperature modified asphalt mixture which comprises asphalt, an asphalt modifier and aggregate; the surface layer is formed by a sand-containing fog seal layer mixture which comprises a waterborne concentrated cover material, an acrylic resin emulsion, fine sand and water; and the waterborne concentrated cover material comprises asphalt, emulsifier, argil and water. The composite pavement sealing layer provided by the invention has the beneficial effects that the softening point of the asphalt is reduced by utilizing the asphalt modifier, so that the mixing of the normal temperature modified asphalt mixture and the paving of the bottom layer can be realized under normal temperature conditions; and meanwhile, by utilizing the surface layer formed by the sand-containing fog sealing layer mixture, water on the road surface can be effectively prevented from sinking in road and damaging the bottom layer, so that the waterproof performance of the road surface is improved.

Description

technical field [0001] The invention relates to the technical field of road maintenance, in particular to a pavement composite sealing layer and its preparation method and application. Background technique [0002] With the continuous increase of highway mileage in our country, highway maintenance has gradually become the focus of highway management departments. The highway department undertakes the basic task of social services. In terms of capital input and output, not only the cost-effectiveness ratio of the department must be considered, but also the social cost and benefit must be considered comprehensively. Therefore, preventive maintenance can better reflect the nature of the maintenance work of the highway department and achieve its purpose, which is of great significance for extending the service life of the highway, reducing the life cycle cost of the highway, and improving the service level of the highway and the efficiency of resource utilization. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B41/68E01C7/35
CPCC04B26/26C04B41/48C04B41/50C04B41/5037C04B41/68C04B2111/0075C04B2201/50E01C7/356C04B14/14C04B24/26C04B24/08C04B14/041C04B14/06C04B41/5024
Inventor 葛晓亮周天甲高燕张远超许静国刘超
Owner 北京路凯泰公路养护工程有限公司
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