Asphalt mixture, preparation method of asphalt mixture and construction method for maintenance of asphalt pavement

A technology of asphalt mixture and asphalt, which is applied in the field of road construction, can solve problems such as threats to human health and the natural environment, high rolling temperature, etc., and achieve the effects of reducing harmful gases, reducing emissions, and reducing energy consumption

Active Publication Date: 2013-12-11
NANJING ROAD KEEPER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In related technologies, the asphalt mixture used in asphalt pavement maintenance requires a relatively high rolling temperature (usually 140-150°C, that is, above 140°C). Under this temperature condition, the asphalt mixture will release a large amount of harmful gases. Threats to human health and the natural environment

Method used

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  • Asphalt mixture, preparation method of asphalt mixture and construction method for maintenance of asphalt pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment provides a kind of asphalt mixture, it comprises:

[0021] Asphalt, surfactants, aggregates, mineral powder; the surfactant is a surfactant with a pH value of 9.5±1, an amine value of 400-500mg / g, and a solid content of ≥9.5%.

[0022] The rolling temperature required for the above-mentioned asphalt mixture is 90-130°C. Under this temperature condition, the harmful gas emitted by the asphalt mixture is greatly reduced. The temperature is lowered by at least 20°C, thus reducing the energy consumption for heating during rolling. It can be seen that the above-mentioned asphalt mixture not only reduces the emission of harmful gases during rolling, but also reduces energy consumption, so it is more environmentally friendly and safe to use for asphalt pavement maintenance.

[0023] The reason for the low rolling temperature of the above-mentioned asphalt mixture is that: add a mixture with a pH value of 9.5±1, an amine value of 400-500 mg / g, and a solid conte...

Embodiment 2

[0029] This embodiment provides the preparation method of the asphalt mixture of embodiment one, comprises the following steps:

[0030] Step 101: mixing mineral powder and aggregate and heating to 145-160°C;

[0031] Step 102: heating the asphalt to 145-160°C;

[0032] Step 103: adding a surfactant to the heated asphalt, and stirring to mix;

[0033] Step 104: Mix the mixed asphalt and surfactant with the mixed and heated mineral powder and aggregate, and stir, and control the temperature of the mixture at 135-150° C. during the stirring process.

Embodiment 3

[0035] This embodiment provides a kind of asphalt mixture, it comprises:

[0036] Asphalt, surfactant, aggregate, mineral powder and polyester fiber; the surfactant is a surfactant with a pH value of 9.5±1, an amine value of 400-500mg / g, and a solid content of ≥9.5%.

[0037] Compared with Example 1, the Marshall stability of the asphalt mixture in this embodiment is higher and the work performance is better, because: the polyester fiber in the asphalt mixture plays the role of adsorption, absorbing asphalt and improving the cohesion of the asphalt mixture It also has the function of dispersing asphalt mineral powder and stabilizing asphalt film.

[0038] In addition, the asphalt used in all the above examples may preferably use high-strength asphalt or styrene-butadiene-styrene block copolymer (SBS) modified asphalt.

[0039] The high-strength asphalt mentioned above refers to asphalt with the following technical indicators:

[0040] The penetration of a load of 100 grams i...

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Abstract

The invention discloses an asphalt mixture, a preparation method of the asphalt mixture and a construction method for maintenance of an asphalt pavement. The asphalt mixture comprises asphalt, a surfactant, aggregates and mineral powder; the surfactant has a pH value of 9.5 plus and minus 1, an amine value of 400 to 500 mg/g and solid content of greater than or equal to 9.5 percent. The preparation method of the asphalt mixture comprises the following steps; mixing the mineral powder and the aggregates and heating to a temperature of 145 to 160 DEG C; heating the asphalt to a temperature of 145 to 160 DEG C; adding the surfactant into the heated asphalt, stirring and mixing; mixing the mixed asphalt and surfactant and the mixed and heated mineral powder and aggregates, stirring and in the mixing and stirring process, controlling the temperature of the mixture in the range of 135 to 150 DEG C. According to the asphalt mixture, not only is discharge of harmful gas in the rolling process reduced, but also energy consumption is reduced, and thus, the asphalt mixture is more environmental-friendly and safer for maintenance of the asphalt pavement; the construction method of the asphalt mixture, which is used for maintenance of the asphalt pavement, can also achieve the same technical effects.

Description

technical field [0001] The invention relates to the field of road construction, in particular to an asphalt mixture, a preparation method thereof, and a construction method for asphalt pavement maintenance. Background technique [0002] Asphalt pavement maintenance mainly refers to the project of using asphalt mixture to treat ruts, cracks, loose potholes, oil spills, pockmarks and other diseases. In related technologies, the asphalt mixture used in asphalt pavement maintenance requires a relatively high rolling temperature (usually 140-150°C, that is, above 140°C). Under this temperature condition, the asphalt mixture will release a large amount of harmful gases. Threat to human health and the natural environment. Contents of the invention [0003] The object of the present invention is to provide an asphalt mixture, a preparation method thereof and a construction method for asphalt pavement maintenance, so as to solve the above-mentioned problems. [0004] An asphalt m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 商健林王永辉
Owner NANJING ROAD KEEPER TECH
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