Ultra-thin abrasion layer used for road and preparation method thereof

A wear layer, ultra-thin technology, used in roads, roads, and on-site coagulation pavements, etc., can solve problems such as unfavorable technical application and development, small road surface structure depth, and poor anti-skid performance, to promote application. and development, convenient technical construction and excellent road performance

Active Publication Date: 2019-04-12
厦门华特公路沥青技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the currently used ultra-thin wear layer technologies are semi-open or open-graded asphalt mixtures. In order to ensure inter-layer bonding and prevent road surface water seepage, the technical application must be modified with a large amount of spraying. The emulsified asphalt sticky layer is used, and the construction must use an integrated machine that can carry out emulsified asphalt spreading and asphalt mixture paving simultaneously.
However, the above-mentioned all-in-one machine manufacturing has not yet been localized, and imported paving equipment is required for construction, which is expensive and difficult to master, which restricts the application of ultra-thin wear layer technology to a certain extent
[0004] In order to expand the ease of construction, a traditional thin-layer embedded asphalt mixture overlay was tried; however, the effect was not satisfactory, and the problem of interlayer adhesion frequently occurred
At the same time, the ultra-thin wear layer paved with traditional embedded asphalt mixture has a small depth of pavement surface structure, and its anti-skid performance is not as good as that of open-graded or semi-open-graded asphalt mixture, and its anti-skid performance decays quickly. In addition, the above-mentioned asphalt mixture generally has compaction quality problems, early water damage is common on the road surface, and the durability is poor
[0005] Therefore, the ultra-thin wear layer system currently used in road surface preventive maintenance construction has a strong dependence on foreign technology, which is not conducive to the application and development of this technology in my country

Method used

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  • Ultra-thin abrasion layer used for road and preparation method thereof
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  • Ultra-thin abrasion layer used for road and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embedded modified asphalt mixture material composition:

[0061] Bitumen: Polymer Modified Bitumen

[0062] Coarse aggregate: basalt crushed stone

[0063] Fine aggregate: diabase rock chips

[0064] Filler: limestone powder

[0065] Polyester fiber: 6mm chopped polyester fiber

[0066] The composition ratio of the above materials designed through experiments is shown in Table 5:

[0067] Table 5 Material composition ratio of embedded modified asphalt mixture

[0068]

[0069] Grading of embedded modified asphalt mixture:

[0070] The mineral aggregate gradation of the embedded modified asphalt mixture prepared according to the composition ratio shown in Table 5 is shown in Table 6:

[0071] Table 6 Mineral gradation of embedded modified asphalt mixture

[0072]

[0073] Volume Index of Compacted and Embedded Asphalt Mixture

[0074] The embedded modified asphalt mixture prepared according to the composition ratio shown in Table 5 was aged at a temperature o...

Embodiment 2

[0085] In the present invention, the ultra-thin wear layer formed by the existing ultra-thin construction special-purpose integrated machine that sprays the emulsified asphalt and paves the hot-mix asphalt mixture simultaneously is tested for road performance and interlayer bonding, and the results are as follows:

[0086] Modified asphalt mixture material composition

[0087] Bitumen: Polymer Modified Bitumen

[0088] Coarse aggregate: basalt crushed stone

[0089] Fine aggregate: diabase rock chips

[0090] Filler: limestone powder

[0091] The composition ratios of the above materials are designed as shown in Table 9 through experiments:

[0092] Table 9 Material composition ratio of modified asphalt mixture

[0093]

[0094] Mineral Grading of Modified Asphalt Mixture

[0095] The aggregate gradation of the ultra-thin wearing layer modified asphalt mixture prepared according to the composition ratio shown in Table 9 is shown in Table 10:

[0096] Table 10 Mineral ...

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Abstract

The invention provides an ultra-thin abrasion layer used for a road and a preparation method thereof. The ultra-thin abrasion layer includes a connection layer connecting to an original road surface,and an embedded type asphalt mixture laid on the connection layer; the connection layer is non-stick wheel modified emulsified asphalt, and the emulsified asphalt of 0.2 L / m2-1.2 L / m2 is sprayed on the original road surface at a road surface temperature of not lower than 0 DEG C; and the embedded type asphalt mixture is laid at a temperature of 135 DEG C to 170 DEG C, and the layer thickness aftercompaction is 1.5 cm-2.5 cm. In a ultra-thin abrasion layer technology, routine construction equipment can be employed and special integrated machine paving equipment can be employed for construction, the technical threshold and the investment cost of the ultra-thin abrasion layer used for the road are reduced, and at the same time, the ultra-thin abrasion layer is guaranteed to be waterproof, the ultra-thin abrasion layer used for the road is provided with the anti-sliding performance same as an open gradation or semi-open gradation asphalt mixture, and application and development of the ultra-thin abrasion layer technology in China are promoted.

Description

technical field [0001] The invention belongs to the technical field of road surface preventive maintenance, and in particular relates to an ultra-thin wear layer for roads and a preparation method thereof. Background technique [0002] The ultra-thin wear course for roads is a thin layer of asphalt mixture with a thickness of 1.5cm to 2.5cm paved on the existing road surface. Insufficient and other mild pavement diseases, restore or improve road traffic capacity, prevent the development of original pavement diseases, and prolong the service life of roads. It is currently a widely used preventive maintenance technology for pavement. This technology has many advantages such as thin thickness, low investment cost, fast construction speed, anti-skid, wear resistance, excellent road performance and high technical feasibility, and has been favored in domestic road maintenance projects in recent years. [0003] However, most of the currently used ultra-thin wear layer technologies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C7/24E01C7/26
CPCE01C7/18E01C7/187E01C7/24E01C7/262
Inventor 胥亮马云容蔡智慧张翔宇
Owner 厦门华特公路沥青技术有限公司
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