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A kind of anti-rutting drainage ultra-thin overlay asphalt mixture and preparation method thereof

A kind of asphalt mixture and drainage technology, which is applied in the field of drainage ultra-thin overlay asphalt mixture and its preparation, can solve the problems of road surface anti-skid performance that affects driving comfort, driving safety threats, and insufficient rutting resistance. Improve high temperature stability and anti-rutting ability, improve driving comfort and safety, good drainage performance and anti-rutting ability

Active Publication Date: 2021-12-21
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the anti-rutting ability of the drainage ultra-thin overlay asphalt mixture is insufficient, the road surface will easily produce diseases such as waves, shifting, and rutting under the repeated action of traffic loads, which will affect the driving comfort and anti-skid performance of the road surface, and will affect driving safety. sexual threat

Method used

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  • A kind of anti-rutting drainage ultra-thin overlay asphalt mixture and preparation method thereof
  • A kind of anti-rutting drainage ultra-thin overlay asphalt mixture and preparation method thereof
  • A kind of anti-rutting drainage ultra-thin overlay asphalt mixture and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] This embodiment is a preparation method of a rutting-resistant drainage ultra-thin overlay asphalt mixture provided by the present invention, comprising the following steps:

[0040] (1) Prepare raw materials: aggregate (10mm diabase gravel), high-viscosity asphalt (provided by Shell Asphalt Co., Ltd.), alkaline limestone slag (remove impurities in slag powder);

[0041] (2) Divide the aggregate into coarse aggregate and fine aggregate, and determine the density of coarse aggregate, fine aggregate, filler and asphalt (the bulk density of coarse aggregate is 2.90g / cm 3 , the bulk density in the compacted state is 1.72g / cm 3 ;The apparent relative density of fine aggregate is 2.93g / cm 3 ; The relative density of high-viscosity asphalt is 1.023g / cm 3 , The relative density of alkaline limestone powder is 2.864g / cm 3 ), the volumetric method is used to determine the mass ratio of coarse and fine aggregates, specifically, the mass percentage of coarse and fine aggregates ...

experiment example 1

[0057] In this experimental example, according to the preparation method of the rutting-resistant drainage ultra-thin overlay asphalt mixture described in Example 1, the optimal amount of asphalt is used to obtain the drainage ultra-thin overlay asphalt mixture, which passes the rutting dynamic stability test, low temperature Trabecular bending test, immersion Marshall test, freeze-thaw splitting test and construction depth test verify the pavement performance of drainage ultra-thin overlay asphalt mixture.

[0058] 1. Rutting dynamic stability test

[0059] According to the requirements of asphalt and asphalt mixture test regulations (JTGF20-2011) T0719, three sets of rutting tests were carried out under the conditions of 60±1°C and 0.7±0.05MPa (the three sets of rutting tests were all asphalt mixtures prepared in the same batch) , is a repeatability test), and the test results are shown in Table 4.

[0060] Table 4 rutting dynamic stability test results

[0061]

[0062...

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Abstract

The invention relates to a rutting-resistant drainage ultra-thin overlay asphalt mixture and a preparation method thereof, belonging to the technical field of road maintenance. The preparation method of the drainage ultra-thin overlay asphalt mixture provided by the present invention comprises the following steps: preparing aggregate, asphalt and filler; dividing the aggregate into coarse aggregate and fine aggregate, and determining the coarse aggregate and fine aggregate , filler and asphalt density, use the volume method to determine the proportion of coarse and fine aggregates in the gradation, void ratio and asphalt mass percentage; according to the mass ratio of coarse and fine aggregates and the Fowler series, complete drainage ultra-thin overlay asphalt mixing The gradation design of the material is added to the key mesh of the screen; the optimal asphalt mass percentage of the drainage ultra-thin overlay asphalt mixture is determined. The asphalt mixture prepared by the preparation method provided by the invention has a relatively large void ratio, many contacts between coarse aggregates, good stability of the space network structure of the skeleton, strong embedding force between the skeletons, good drainage performance and rutting resistance.

Description

technical field [0001] The invention relates to a rutting-resistant drainage ultra-thin overlay asphalt mixture and a preparation method thereof, belonging to the technical field of road maintenance. Background technique [0002] With the continuous development of the economy and the deepening of the urbanization process, the traffic load is also increasing year by year, so people's requirements for the performance of the road are getting higher and higher. In rainy weather, the incidence of road accidents is much higher than in sunny days, and vicious accidents such as serial rear-end collisions and water drifts occur frequently. The main reason for the high incidence of accidents is that there is a large amount of water on the road, the friction coefficient of the road surface is significantly reduced, and the braking distance is greatly extended. Therefore, it is reasonable to use a drainage ultra-thin overlay with a large structural void ratio and an obvious pavement dra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2201/50C04B2111/0075C04B2111/00284C04B18/12C04B14/28
Inventor 黄文柯崔文天吴旷怀蔡旭
Owner GUANGZHOU UNIVERSITY