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Asphalt material, asphalt mixture comprising same and preparation methods of asphalt material and asphalt mixture

A technology of asphalt mixture and asphalt materials, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of large inherent shrinkage of asphalt and asphalt mixture, and achieve the effect of alleviating road surface cracking and reducing shrinkage performance

Inactive Publication Date: 2012-07-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of large inherent shrinkage of existing asphalt and asphalt mixture, and provides an asphalt material, an asphalt mixture containing it and a preparation method for the two

Method used

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  • Asphalt material, asphalt mixture comprising same and preparation methods of asphalt material and asphalt mixture

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specific Embodiment approach 1

[0016] Specific Embodiment 1: In this embodiment, a kind of asphalt material is composed of pitch, zirconium tungstate and silane coupling agent, wherein the mass ratio of pitch to zirconium tungstate is 1: (0.1~1), zirconium tungstate and silane coupling The mass ratio of the agent is 100:(0.5~2).

[0017] In this embodiment, by adding a certain proportion of zirconium tungstate anti-expansion material to the asphalt, the shrinkage of the asphalt material is reduced, and its linear expansion coefficient is reduced to 3.5×10 -4 ~2.8×10 -4 ( / °C), using the asphalt material of the present invention for road construction can reduce the shrinkage performance of the asphalt pavement and alleviate the cracking of the pavement.

specific Embodiment approach 2

[0018] Specific embodiment two: a kind of preparation method of asphalt material in this embodiment is characterized in that the preparation method of described asphalt material is carried out according to the following steps:

[0019] 1. Weigh pitch, zirconium tungstate and silane coupling agent, wherein the mass ratio of pitch to zirconium tungstate is 1:(0.1~1), and the mass ratio of zirconium tungstate to silane coupling agent is 100:(0.5~ 2);

[0020] 2. Heat the pitch weighed in step 1 to 100-200°C, add the zirconium tungstate weighed in step 1 to it, and stir for 0.5-600rpm at a temperature of 100-200°C and a stirring speed of 30-600rpm. After 2 hours, add the silane coupling agent weighed in step 1, stir for 0.5-6 hours at a temperature of 100-200° C. and a stirring speed of 30-600 rpm, and cool to room temperature to obtain an asphalt material.

[0021] In this embodiment, asphalt mixing equipment is used for stirring. The asphalt of this embodiment is a commerciall...

specific Embodiment approach 3

[0023] Embodiment 3: In this embodiment, an asphalt mixture containing the asphalt material described in Embodiment 1 is composed of 4%-6% asphalt material and 94%-96% aggregate by mass percentage.

[0024] The shrinkage of the asphalt mixture in this embodiment is reduced, and its coefficient of linear expansion is reduced to 3.0×10 -5 ( / °C), using the asphalt material of the present invention for road construction can reduce the shrinkage performance of the asphalt pavement and alleviate the cracking of the pavement.

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Abstract

The invention discloses an asphalt material, an asphalt mixture comprising the asphalt material and preparation methods of the asphalt material and the asphalt mixture, relating to asphalt materials, asphalt mixtures and preparation methods of asphalt materials and asphalt mixtures. The invention is used to solve the problem that the existing asphalt and asphalt mixtures have large natural shrinkage. The asphalt material provided by the invention consists of asphalt, zirconium tungstate and a silane coupling agent. The preparation method of the asphalt material comprises the following steps: weighing asphalt, zirconium tungstate and the silane coupling agent; adding zirconium tungstate into hot asphalt; stirring and then adding the silane coupling agent; stirring and cooling to obtain the asphalt material. The asphalt mixture consists of the asphalt material and aggregate. The preparation method of the asphalt mixture comprises the following steps: drying the aggregate; adding the dried aggregate into the asphalt material; and stirring to finally obtain the asphalt mixture. The asphalt material and asphalt mixture provided by the invention have the advantages that the linear expansion coefficient is reduced to 3.5*10<-4>-3.0*10<-5> and the shrinkage degree is reduced; if the materials provided by the invention are used for building a road, road cracking can be relieved. The methods disclosed by the invention are used for preparing asphalt materials and asphalt mixtures.

Description

technical field [0001] The invention relates to an asphalt material, an asphalt mixture and a preparation method thereof. Background technique [0002] Low-temperature cracks are one of the main diseases of asphalt pavement, and they are common in all countries in the world. The existence of cracks allows road surface water, air and other harmful substances to invade the interior of the pavement structure through the cracks, and penetrate into the pavement base and subgrade along the gaps in the mixture, making the pavement base and subgrade soft, and the bearing capacity of the pavement structure decreases. Under the action of load, pumping and scouring will occur, and the interface layer will be partially voided, and then local depressions will be formed on the road surface, which will eventually lead to network cracks and potholes on the road surface, seriously affecting the driving quality of the vehicle, and greatly reducing the service life of the road surface. Moreov...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K9/06C08K3/24C04B26/26C04B14/04
Inventor 易军艳冯德成于飞巩春伟王东升
Owner HARBIN INST OF TECH
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