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Drainage pavement structure

A technology of pavement structure and drainage asphalt, which is applied in the direction of roads, roads, pavement details, etc., can solve the problems of inability to achieve anti-cracking effect, can not be used for drainage and noise reduction pavement, stress concentration, etc., to overcome poor shear resistance, Improved durability and excellent fracture resistance

Active Publication Date: 2021-06-01
ANHUI TRANSPORTATION HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the basalt fiber geogrid concrete cannot be used for drainage and noise reduction pavement, it is easy to cause stress concentration, and it cannot achieve excellent anti-cracking effect

Method used

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preparation example Construction

[0082] Further, the present invention also provides a method for preparing the drainage asphalt mixture in the drainage pavement structure, which includes the step of mixing the components of the drainage asphalt mixture.

[0083] Specifically, the preparation method of the drainage asphalt mixture of the present invention includes the following steps: first mix the composite fiber, then dry mix with the coarse aggregate and fine aggregate in the graded aggregate, and then add SBS modified asphalt and mix After continuing to add ore powder and stir, the drainage asphalt mixture is obtained.

[0084] Further, weigh granular lignin fiber and glass fiber respectively, stir the two fibers evenly at room temperature, dry mix with coarse aggregate and fine aggregate for 50-150s, and finally add SBS at a temperature of 150-200°C Stir the modified asphalt for 80-160s, and finally add mineral powder and stir quickly. During the mixing process, try to make the composite fiber evenly di...

Embodiment 1

[0110] According to the designed gradation, the drainage asphalt mixture was prepared under the condition of 7% asphalt dosage of the total mass of the graded aggregate, in which the total mass of the graded aggregate was about 1121.5g: the first asphalt layer 1 was the drainage asphalt layer, and the Drainage asphalt mixture, the porosity of the first asphalt layer 1 is 11%; the construction thickness is 4cm. The specific preparation method is as follows:

[0111] Dry the coarse aggregate and fine aggregate at a temperature of 105° C., weigh 1.8 g of granular lignin fiber and 1.8 g of glass fiber (that is, the mass ratio of granular lignin fiber to glass fiber is 1:1), mix the two kinds of fibers evenly at room temperature, then dry mix them with the washed and dried coarse aggregate and fine aggregate for 90s, then add 78.5g of SBS modified asphalt at a temperature of 180°C and stir 120s, and finally add mineral powder and stir quickly. During the mixing process, try to ma...

Embodiment 2

[0116] According to the designed gradation, the drainage asphalt mixture was prepared under the condition of 7% bitumen content of the total mass of the graded aggregate, and the total mass of the graded aggregate was about 1121.5g. The first asphalt layer 1 is a drainage asphalt layer, and the drainage asphalt mixture is used. The porosity of the first asphalt layer 1 is 11%; the construction thickness is 4cm.

[0117] Dry the coarse aggregate and fine aggregate at a temperature of 105° C., weigh 2.4 g of granular lignin fiber and 1.2 g of glass fiber (that is, the mass ratio of granular lignin fiber to glass fiber is 2:1, after mixing the two fibers evenly at room temperature, dry mix them with the washed and dried coarse aggregate and fine aggregate for 90s, then add 78.5g of SBS modified asphalt at a temperature of 180°C and stir for 120s , and stir rapidly after adding the mineral powder at last. During the stirring process, the composite fiber is evenly distributed in th...

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Abstract

The invention provides a drainage pavement structure. The drainage pavement structure comprises a first asphalt layer, the first asphalt layer comprises a drainage asphalt mixture, and the porosity of the first asphalt layer is 11 to 18%; the drainage pavement structure further comprises a stress dissipation layer which comprises a high-viscosity asphalt layer, and a waterproof binding layer which comprises a basalt fiber geogrid; the drainage asphalt mixture is prepared from the following components: polymer modified asphalt, graded aggregate and composite fibers; the composite fibers comprise glass fibers and granular lignin fibers, and the mass ratio of the glass fibers to the granular lignin fibers is 1: 0.3 to 3. The drainage pavement structure disclosed by the invention has drainage, noise reduction, crack resistance and durability, and can meet the requirements of road engineering construction.

Description

technical field [0001] The invention relates to a drainage pavement structure, which belongs to the field of road engineering materials. Background technique [0002] With the development of economy and the rapid growth of traffic volume, the concept of "green traffic" and "traffic safety" has gradually become an important development trend of road engineering construction. Drainage and noise reduction pavement has the functions of drainage and noise reduction by virtue of its large void structure. On the one hand, it can effectively eliminate the water film on the road surface in rainy days and improve the safety of driving; on the other hand, it can greatly reduce the noise generated by traffic and play a role in environmental protection effect. Therefore, drainage noise reduction asphalt pavement has attracted great attention. [0003] In the prior art, a single-layer drainage and noise-reducing pavement is commonly used, and a layer of large-gap open-graded drainage as...

Claims

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Application Information

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IPC IPC(8): E01C7/18E01C7/26E01C11/22E01C3/06C04B26/26
CPCE01C7/18E01C7/185E01C7/182E01C7/262E01C11/226E01C3/06C04B26/26C04B2111/0075C04B16/02C04B14/42C04B18/12Y02A30/60
Inventor 王凯黄学文龚演车承志罗向阳何金武周震宇严二虎罗恺彦刘玉红武强潘树
Owner ANHUI TRANSPORTATION HLDG GRP CO LTD
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