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Gangue asphalt modifier, modified asphalt mixture, and preparation methods of gangue asphalt modifier and modified asphalt mixture

A technology of asphalt modifier and coal gangue, which is used in building thermal insulation materials, building components, buildings, etc., to achieve the effect of realizing high and low temperature contradiction, improving high temperature stability, improving low temperature performance and water damage resistance

Inactive Publication Date: 2013-04-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can solve the early disease problem of expressway, and combined with the status quo of resource reuse of coal gangue building materials, coal gangue is used as the main raw material to effectively improve the comprehensive performance of asphalt mixture, making it less prone to high temperature rutting, low temperature cracking and water damage, and Can fully guarantee road performance and driving safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Crush the original massive coal gangue and put it into a ball mill for fine grinding for 5 hours to obtain coal gangue powder; then add water glass with a modulus of 1.0 to the coal gangue powder and mix well, the addition amount is coal gangue The mass of gangue powder is 7%, finely ground for 2 hours, placed in a resistance furnace for calcination at 700°C, kept for 7 hours, quenched in water and then ground for 3 hours to obtain activated gangue powder.

[0018] (2) Mix 70% of activated coal gangue powder prepared in step (1), 20% of brucite fiber and 10% of quicklime to obtain a mixture, and grind the mixture to a powder of less than 200 meshes to obtain a modified coal gangue pitch. sex agent.

[0019] (3) Mix 5 parts by weight of Karamay A-70 No. 150°C hot asphalt and 90 parts of aggregate in the mixing building, and then add 5 parts of coal gangue asphalt modifier and mix evenly to obtain modified permanent asphalt mixture. Modified asphalt mixture test gra...

Embodiment 2

[0022] (1) Crush the original massive coal gangue and put it into a ball mill for fine grinding for 4 hours to obtain coal gangue powder; then add water glass with a modulus of 1.3 to the coal gangue powder and mix well, the addition amount is coal gangue The mass of gangue powder is 4%, finely ground for 2 hours, put it into a resistance furnace for calcination at 750°C, heat preservation for 6 hours, quenched in water and then pulverized for 4 hours to obtain activated gangue powder.

[0023] (2) Mix 80% of activated coal gangue powder prepared in step (1), 10% of brucite fiber and 10% of quicklime to obtain a mixture, and grind the mixture to a powder of less than 200 meshes to obtain a coal gangue asphalt modified sex agent.

[0024] (3) Mix 4 parts by weight of Karamay A-70 No. 170°C hot asphalt and 88 parts of aggregate in the mixing building, and then add 8 parts of coal gangue asphalt modifier and mix evenly to obtain the improved permanent asphalt mixture. Modified ...

Embodiment 3

[0027] (1) Crush the original massive coal gangue and put it into a ball mill for fine grinding for 6 hours to obtain coal gangue powder; then add water glass with a modulus of 0.7 to the coal gangue powder and mix well, the addition amount is coal gangue The mass of gangue powder is 4%, finely ground for 1 hour, placed in a resistance furnace for calcination at 650°C, kept for 8 hours, quenched and then ground for 2 hours to obtain activated gangue powder.

[0028] (2) Mix 70% of activated coal gangue powder prepared in step (1), 10% of brucite fiber and 20% of quicklime to obtain a mixture, and grind the mixture to a powder of less than 200 meshes to obtain a coal gangue asphalt modified sex agent.

[0029] (3) Mix 6 parts by weight of Karamay A-70 No. 160°C hot asphalt and 91 parts of aggregate in the mixing building, and then add 5 parts of coal gangue asphalt modifier and mix evenly to obtain the improved permanent asphalt mixture. Modified asphalt mixture test gradatio...

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Abstract

The invention relates to a highway asphalt material technique, and discloses a gangue asphalt modifier, a modified asphalt mixture and preparation methods of the gangue asphalt modifier and the modified asphalt mixture. The gangue asphalt modifier comprises the following components by weight percentage: 70-90% of activated gangue powder, 10-20% of quick lime, and 10-20% of natural brucite fiber. The modified asphalt mixture is characterized in that the modified asphalt mixture comprises the following components in parts by weight: 5-8 parts of gangue asphalt modifier, 4-6 parts of asphalt and 88-92 parts of aggregate. The gangue asphalt modifier can obviously improve high-temperature stability, low-temperature cracking resistance and water stability of the asphalt mixture, can effectively prevent and control early diseases of a pavement, and can prolong the service life of an asphalt pavement; in addition, the gangue asphalt modifier is prepared by taking gangue as a main raw material, full use of industrial residues is facilitated, and the highway construction cost is lowered, so that higher economic and social benefits can be obtained.

Description

technical field [0001] The invention relates to road asphalt material technology, in particular to a coal gangue asphalt modifier, a modified asphalt mixture and a preparation method thereof. Background technique [0002] At present, under the joint action of traffic load and natural environment, high-grade highway asphalt pavement, early diseases such as high-temperature rutting, low-temperature cracking and water damage occur frequently, and the damage mechanism is more complicated, resulting in a decline in the use quality of asphalt pavement, shortening the service life, and Greatly increase the maintenance cost of asphalt pavement. In recent years, new structures, new processes and new materials of asphalt pavement have emerged continuously, and the research level and technical application level of asphalt pavement have also reached a higher level, among which the development of modified asphalt technology is the most eye-catching. The well-known polymer-modified aspha...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K9/02C08K3/36C08K3/22C08K7/08C04B26/26
Inventor 关博文熊锐陈拴发刘开平盛燕萍薛斌
Owner CHANGAN UNIV
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