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Ultrahigh-viscosity porous antiskid asphalt drainage surface layer

An ultra-high viscosity and ultra-high technology, applied in the field of traffic engineering, can solve the problems of poor anti-fatigue performance and high cost, and achieve the effects of excellent anti-fatigue performance, increased service life, and improved anti-fatigue performance

Inactive Publication Date: 2020-04-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In view of the poor fatigue resistance and high cost of the asphalt surface in the prior art, the present invention provides an ultra-high-viscosity porous anti-skid asphalt drainage surface HVPC (High-Viscosity PorousCourse)

Method used

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  • Ultrahigh-viscosity porous antiskid asphalt drainage surface layer
  • Ultrahigh-viscosity porous antiskid asphalt drainage surface layer
  • Ultrahigh-viscosity porous antiskid asphalt drainage surface layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Performance of ultra-high viscosity asphalt binder:

[0047]

[0048] Use third-grade aggregate and mineral powder (≤0.075mm), control the passing rate of the key sieve hole 2.36mm, and choose three groups of gradations of 11.7%, 15.2%, and 17.4% as the initial gradation.

[0049] According to the optimal asphalt dosage of 7-7.5%, by the relationship

[0050] Asphalt dosage = asphalt ratio / (1+ asphalt ratio)

[0051] The mass percentage of asphalt and aggregate is in the range of 7.5-8%.

[0052] Therefore, in this embodiment, the asphalt ratio of 7.5% is selected as the asphalt ratio of the preliminary gradation. The Marshall specimens were compacted 50 times on each side, and the volumetric method was used to measure the bulk density of the asphalt mixture. The Marshall test results are shown in the table below.

[0053]

[0054]

[0055] With 14% as the target void ratio, the following gradation is selected as the design gradation:

[0056] M...

Embodiment 2

[0064] The properties of ultra-high viscosity asphalt binder are the same as in Example 1.

[0065] Three grades of aggregate and mineral powder are used to control the passing rate of the key sieve hole of 2.36mm, and three groups of gradations are selected as the initial gradation of 13.2%, 16.9%, and 19.4%.

[0066] Same as in Example 1, the asphalt ratio of 7.5% is used as the ratio of asphalt in the initial gradation. The Marshall specimens were compacted 50 times on each side, and the volumetric method was used to measure the bulk density of the asphalt mixture. The Marshall test results are shown in the table below.

[0067]

[0068] With 14% as the target void ratio, the following gradation is selected as the design gradation:

[0069]

[0070] Get Marshall test piece and carry out performance test with embodiment 1, the result is as follows:

[0071]

[0072]

[0073] Drainage performance: Same as Example 1, evaluate the drainage performance of ultra-hig...

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Abstract

The invention discloses an ultrahigh-viscosity porous antiskid asphalt drainage surface layer which is a mixture formed by taking ultrahigh-viscosity asphalt as a binding material and open graded broken stone as an aggregate through warm mixing. In the implementation process, the void ratio of the surface layer is finally controlled to be 13%-16%, so that the durability of the drainage pavement isimproved, meanwhile, the water seepage capacity is larger than 4000 mL.min <-1 >, the friction coefficient is within the range of 64-67, and good anti-skid performance is achieved. On the basis of reducing the porosity of the asphalt surface layer, the drainage skid resistance is ensured, and the fatigue durability of the drainage pavement structure can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of traffic engineering, and in particular relates to an ultra-high-viscosity porous anti-slip asphalt drainage surface layer. Background technique [0002] With the development of high-grade roads and the improvement of people's requirements for road safety, comfort and environmental protection, drainage asphalt pavement is being used more and more widely as a high-quality pavement. It can prevent the formation of water film on the road surface in rainy days, greatly reduce the probability of wheel drift, and has the functions of suppressing water splashing and reducing noise. The open-graded anti-skid wear layer OGFC is the most widely used type of drainage pavement at the present stage. [0003] Open graded drainage asphalt wear layer OGFC has large voids (generally between 18% and 25%), and is usually obtained by using high-viscosity asphalt or adding a high-viscosity modifier during mixing. Water can f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/35E01C11/22E01C11/24
CPCE01C7/35E01C11/226E01C11/24
Inventor 黄晓明黄怡马涛胡建英马柏杨蒋永茂
Owner SOUTHEAST UNIV
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