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A kind of composite asphalt modifier and its preparation method and application

A composite asphalt and modifier technology, which is applied in the field of asphalt modifiers, can solve the problems of difficult compatibility of base asphalt, large investment in modification equipment, complicated modification process, etc., and achieve an increase in softening point, decrease in penetration, The obvious effect of economic advantages

Active Publication Date: 2015-09-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of SBS asphalt modifier, large investment in modification equipment, complex modification process, and high energy consumption, SBS asphalt modifier has the problem of incompatibility with base asphalt, and transportation and storage require heating, heat preservation and uninterrupted Stir to prevent the separation of SBS asphalt modifier and base asphalt

Method used

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  • A kind of composite asphalt modifier and its preparation method and application
  • A kind of composite asphalt modifier and its preparation method and application

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preparation example Construction

[0030] In the preparation of the asphalt mixture of the present invention, there is no need to specifically limit the amount of aggregate and mineral powder added.

[0031] All the stirring in the present invention is a conventional stirring method in the art, without special limitation.

Embodiment 1

[0033] A composite asphalt modifier, prepared by the following steps:

[0034] Take 25% of rock pitch, 40% of No. 10 petroleum pitch, and 35% of coal tar pitch; grind the rock pitch to 400 meshes, put No. 10 petroleum pitch into the reactor and heat to 300°C, slowly add coal pitch, Then add rock asphalt, develop for 1 hour, and start the mixer throughout the whole process; after the development, release the processed asphalt to cool to room temperature, and then grind it to 100 mesh to obtain a composite asphalt modifier.

Embodiment 2

[0036] A composite asphalt modifier, prepared by the following steps:

[0037] Take 20% rock asphalt, 40% No. 10 petroleum pitch, and 40% coal tar pitch; grind the rock pitch to 700 mesh, put No. 10 petroleum pitch into the reactor and heat to 260°C, slowly add coal tar pitch, Then add rock asphalt, develop for 2 hours, and start the mixer throughout the whole process; after the development, release the processed asphalt to cool to room temperature, and then grind it to 200 mesh to obtain a composite asphalt modifier.

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Abstract

The invention discloses a composite asphalt modifier, its preparation method and application. The composite asphalt modifier consists of 20-30% of rock asphalt, 30-40% of 10# petroleum asphalt and 30-40% of coal asphalt. The preparation method of the composite asphalt modifier includes: firstly heating the 10# petroleum asphalt to 260-300DEG C, then adding the coal asphalt and the rock asphalt ground to powder particles of 300-800 meshes, carrying out heating at the same time of stirring to obtain a uniformly mixed mixture, further conducting stirring development for 1-2h; cooling the well developed mixture to room temperature, then grinding it to 80-200 meshes, thus obtaining the composite asphalt modifier. The composite asphalt modifier provided in the invention can be used for blending a modified asphalt mixture, which can be paved on high-grade highways and municipal roads. The obtained modified asphalt mixture has excellent anti-rutting performance, anti-water damage performance and anti-ageing capability.

Description

technical field [0001] The invention belongs to the field of asphalt modifiers, in particular to a composite asphalt modifier and its preparation method and application. Background technique [0002] With the rapid development of my country's social economy, the traffic volume has increased sharply, and road construction has also embarked on a stage of rapid development. By the end of 2011, the total mileage of national expressways has exceeded 80,000 kilometers, ranking second in the world. By 2020, China The highway mileage will reach 100,000 kilometers. In high-grade highways, asphalt pavement is widely used for its good mechanical properties, flat and wear-resistant surface, smooth and comfortable driving performance, less dust, less vibration, low noise, short construction period and easy maintenance and repair. In recent years, more than 90% of the newly built high-grade pavement in my country adopts the structure type of asphalt pavement. Most highway asphalt pavemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C04B26/26E01C7/22
Inventor 黄文通潘桂梅
Owner SOUTH CHINA UNIV OF TECH
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