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Asphalt mixture modfied with polyester and polyamide fiber possessing irregular cross section and its prepn

A technology of asphalt mixture and polyester polyamide, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of poor durability, improve mechanical properties, reduce embrittlement point temperature, compatibility and durability Good results

Inactive Publication Date: 2004-09-08
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Asphalt SMA is a new type of road construction material developed in Germany to solve the rutting problem on the basis of pouring asphalt concrete. The gaps in the skeleton of the grade material composed of stones, so that the mixture not only has the advantages of large gap drainage road surface function, but also overcomes the disadvantages of poor durability, and has the advantages of embedding and compactness.

Method used

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  • Asphalt mixture modfied with polyester and polyamide fiber possessing irregular cross section and its prepn
  • Asphalt mixture modfied with polyester and polyamide fiber possessing irregular cross section and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The conventional SMA formula is adopted: among them, the asphalt is 6%, the weight ratio of fiber and asphalt is 1:20, the weight ratio of fiber and stone is 0.4%, and the fiber is figure 2 Shown are the profiled multi-hollow polyester polyamide fibers.

[0024] According to the above ratio, put several kinds of raw materials in the mixer, mix well, then add fiber, dry mix for 1 minute, add asphalt heated to the mixing temperature, wet mix for 1 minute, finally add mineral powder, continue mixing Until it is uniform, the special-shaped cross-section polyester polyamide fiber modified asphalt mixture of the present invention is obtained.

[0025] Add the well-mixed asphalt mixture into the preheated mold, compact it 50 times on both sides with an automatic compactor, and then cool it at room temperature (not less than 12 hours). Remove the sample from the mold. The test performance is shown in Table 1.

Embodiment 2

[0027] The special-shaped multi-hollow polyester polyamide fiber of embodiment 1 is changed into figure 1 For the special-shaped single hollow polyester polyamide fiber shown, other steps are the same as in Example 1, and the test performance is shown in Table 1.

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Abstract

The asphalt mixture modified with polyester and polyamide fiber possessing irregular cross section consists of conventional SMA and hollow polyester and polyamide fiber possessing irregular cross section consists, with the fiber content being 0.01-15 wt%. The present invention is superior in that the hollow polyester and polyamide fiber possesses good lipophilicity to infiltrate and adsorb asphalt, so as to prevent separation of asphalt in the mixture, raise the mechanical performance of the mixture, lower the brittle point, raise the anticracking performance of the mixture and toughen. The present invention is simple and practical and the asphalt mixture may be prepared in available asphalt mixing apparatus.

Description

technical field [0001] The invention relates to an asphalt mixture reinforced with hollow chemical fibers and a preparation method thereof. The mixture is processed by adding special-shaped cross-section single hollow or multi-hollow polyester fibers, and belongs to the field of building materials. Background technique [0002] As we all know, asphalt mixture is one of the main pavement materials used in modern high-grade roads. It is a viscoelastic plastic material with excellent mechanical properties, certain high temperature stability and low temperature flexibility, and the paved road surface is smooth. It has a certain roughness, which is beneficial to driving safety, shock absorption, sound absorption, comfortable driving, convenient construction, and can be recycled. However, with the increase of traffic volume and large-scale and overloaded vehicles, the asphalt concrete has been subjected to high temperature rutting and deformation, the asphalt pavement is loose an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/10C08L95/00E01C7/26
Inventor 王依民倪建华潘湘庆王燕萍邹黎明
Owner DONGHUA UNIV
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