Asphalt concrete for ultra-thin wearing course with easily-compactable skeleton and thickness of 1 to 1.5 cm

An asphalt concrete and wear layer technology, which is applied to the coagulation pavement, building components, climate change adaptation and other directions of on-site paving, can solve the problems of high road maintenance costs, difficult to guarantee compaction, and difficult construction control, etc. Achieve the effects of excellent crack resistance, improved fatigue life and excellent high temperature performance

Active Publication Date: 2016-10-26
TIANJIN HIGHWAY ENG GENERAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drainage structure will be blocked by sediment after a period of use. If professional cleaning equipment is not used, it is difficult to make the road surface achieve the desired effect, and the maintenance cost of the road surface is relatively high.
In recent

Method used

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  • Asphalt concrete for ultra-thin wearing course with easily-compactable skeleton and thickness of 1 to 1.5 cm
  • Asphalt concrete for ultra-thin wearing course with easily-compactable skeleton and thickness of 1 to 1.5 cm
  • Asphalt concrete for ultra-thin wearing course with easily-compactable skeleton and thickness of 1 to 1.5 cm

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Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0057] The advantages of the present invention will be described below for the mix ratio test and verification of 1-1.5cm asphalt single-layer pavement construction with median gradation and different asphalt ratios.

[0058] Table 5 Mixture Median Graded Material Composition Ratio

[0059] material ratio

5-7mm

0-3mm

mineral powder

lime

Oil-stone ratio

median grading

70

22

6

2

5.8-6.2

[0060] Table 6 mixture test results

[0061]

Embodiment 7～9

[0063] Table 7 Embodiment proportioning (%) of the ultra-thin asphalt pavement surface layer mixture of 1-1.5cm of the present invention

[0064] Example

[0065] The asphalt mixture can be produced according to the formula in Table 7. The aggregates and fillers are heated separately, put into the mixing pot by metering, dry mix for 5 seconds, add high-elastic modified asphalt (or warm-mix high-elastic modified asphalt), and mix for 40 seconds, that is It can produce finished asphalt mixture, which can pave 1-1.5cm ultra-thin asphalt pavement, and can achieve good technical and economic effects.

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Abstract

The invention relates to asphalt concrete for an ultra-thin wearing course with an easily-compactable skeleton and a thickness of 1 to 1.5 cm. The ultra-thin wearing course is characterized by comprising an upper asphalt concrete layer and a lower high-viscosity modified emulsified asphalt bonding layer, wherein the laying thickness of the upper asphalt concrete layer is 1.0 to 1.5 cm, and a proper spraying amount of the lower layer is 0.8 to 1.0 kg/m<2>. The mixture for the ultra-thin wearing course forms a skeleton-compact ultrathin pavement and enables the pavement to have good stability, durability and safety performance. The ultra-thin wearing course is applicable to prevention and maintenance of newly-built pavements and old pavements.

Description

technical field [0001] The invention belongs to the technical field of building materials used in road engineering, and aims to provide a formula and design method of an easy-to-compact ultra-thin wearing layer asphalt mixture, which can effectively reduce the cost of the road surface, facilitate construction, and provide a road surface with excellent performance. It is widely used in the construction of expressways and other high-grade highway surfaces and road surface reconstruction projects. technical background [0002] The ultra-thin wear layer is an ultra-thin upper layer formed by discontinuous semi-open gradation modified hot asphalt mixture, which is paved on the treated road surface. It can solve slight cracks, slight looseness, rutting, and surface water seepage on the road surface , poor oil, aging, anti-skid performance decline and other diseases. Ultra-thin wear courses generally use "fine" asphalt mixtures with a maximum nominal particle size of 9.5 mm or 4.7...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/08E01C7/18C04B26/26
CPCC04B26/26C08L95/00C08L2205/03C08L2555/84E01C7/18C08L53/02C08L9/08C04B14/00C04B14/06C04B18/141C04B22/064Y02A30/30
Inventor 赵强刘烝石秀达李响
Owner TIANJIN HIGHWAY ENG GENERAL
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