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Permeable asphalt mixture and preparation method thereof

A permeable asphalt and mixture technology, applied in the field of pavement asphalt materials, can solve the problems of reducing the wrapping force of asphalt on aggregate, reducing the cohesion, and affecting the performance of asphalt mixture, so as to improve the anti-stripping performance and improve the cohesion , the effect of improving its own performance

Active Publication Date: 2022-04-12
苏州东振路桥工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary concrete is made of cement as the cementitious material and mixed with water. The above method can improve the workability of recycled aggregate in cement concrete materials, but it will obviously reduce the adhesion between it and asphalt. cohesion
[0005]In addition, in order to ensure the porosity of permeable asphalt, the proportion of coarse aggregate is usually relatively large, which leads to a small total specific surface area of ​​the asphalt mixture, and the aggregate The asphalt film on the surface is relatively thin, which requires the asphalt in the permeable asphalt mixture to have a better wrapping force on the aggregate. However, the recycled aggregate treated by the traditional method will reduce the wrapping force of the asphalt on the aggregate and affect the asphalt mixture. performance

Method used

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  • Permeable asphalt mixture and preparation method thereof
  • Permeable asphalt mixture and preparation method thereof
  • Permeable asphalt mixture and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0051] The recycled coarse aggregate is prepared by the following method:

[0052] (1) After crushing and sieving the waste concrete whose original design strength is C40 and the aggregate is basalt gravel, coarse aggregate particles with a particle size of 6-19mm are obtained;

[0053] (2) taking coarse aggregate particles and placing them in dilute hydrochloric acid with a concentration of 5wt% for 3 hours to obtain acid-treated coarse aggregate particles;

[0054] (3) Take out the acid-treated coarse aggregate particles, and let them dry naturally at room temperature until there is no water dripping; then spray saturated calcium hydroxide solution on the surface of the acid-treated coarse aggregate particles to obtain alkali-treated coarse aggregate particles; wherein, saturated hydrogen The weight of the calcium oxide solution is 10% of the weight of the acid-treated coarse aggregate particles;

[0055] (4) carbonizing the alkali-treated coarse aggregate particles for 12 ...

preparation example 2

[0058] The difference between this preparation example and the preparation example 1 of recycled coarse aggregate is that the carbonization temperature in step (4) is 30°C, the volume content of carbon dioxide is 100%, and the carbonization treatment time is 6h.

preparation example 3

[0060] The difference between this preparation example and the preparation example 1 of recycled coarse aggregate is that the weight ratio of primary carbonized coarse aggregate particles and secondary carbonized coarse aggregate particles in step (5) is 38:40.

[0061] Preparation example of strengthening liquid

[0062] Unless otherwise specified, the raw materials in the preparation examples can be obtained commercially. Among them, the fineness of silica powder is 2000 mesh; the fineness of sepiolite powder is 1000 mesh; the fly ash is Class II fly ash. The cationic modifier is one of tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide or their mixture, in the following preparation examples All cationic modifiers are cetyltrimethylammonium bromide. The hydrophobic modifier is hexadecyltrimethylsilane. The film-forming resin is E44 epoxy resin, the diluent is ethylene glycol diglycidyl ether, and the curing ag...

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Abstract

The invention relates to the field of pavement asphalt materials, and particularly discloses a permeable asphalt mixture and a preparation method thereof. The invention relates to a permeable asphalt mixture, which is prepared from the following raw materials in parts by weight: 4.3 to 6 parts of asphalt, 78 to 90 parts of recycled coarse aggregate, 19 to 31 parts of recycled fine aggregate, 3 to 5 parts of mineral powder, 0.1 to 0.3 part of reinforced fiber and 0.516 to 0.72 part of high-viscosity modifier, the recycled coarse aggregate is obtained by crushing, acidifying and carbonizing waste concrete. The permeable asphalt mixture can be used for permeable pavements, and has the advantages of good water permeability, good water damage resistance, high strength, large bearing capacity and good high temperature resistance.

Description

technical field [0001] The application relates to the field of pavement asphalt materials, more specifically, it relates to a permeable asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt pavement refers to the road surface formed by paving and compacting asphalt mixture. The material for paving asphalt pavement is called asphalt mixture or asphalt concrete, which is a mixture formed by fully mixing asphalt material with a certain viscosity and an appropriate amount and a certain grade of mineral aggregate. Among them, permeable asphalt mixture, as a kind of open-graded asphalt mixture with interconnected pores, can form a pavement surface layer with a porosity of about 15-25% after compaction when paving the road surface, which has a good Water permeability has played a huge role in solving the problem of poor drainage of urban roads. [0003] In order to form a larger void ratio, the permeable asphalt mixture usually contains a higher ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/02C04B18/16
CPCY02W30/91
Inventor 沈竞宏曹杰猛陶志国赵雨微陈芸戴小艳
Owner 苏州东振路桥工程有限公司
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