Preparation method of premixed reinforced asphalt mixture

An asphalt mixture and enhanced technology, which is applied in the field of transportation engineering, can solve the problems such as damage to the road performance of asphalt mixture, complicated warm mixing technology and difficult evaluation of warm mixing effect, etc., so as to improve high temperature performance and avoid expensive additional agent, the effect of improving road performance

Inactive Publication Date: 2017-03-08
CHANGAN UNIV
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Problems solved by technology

The traditional asphalt mixture preparation method uses warm mixing technology, adding admixtures, etc., which damages part of the road performance of asphalt mixture, and the warm mixing technology is complicated, the admixture is expensive, and the warm mixing effect is difficult to evaluate. Therefore, it is urgent It is necessary to study new materials or new processes to alleviate the above shortcomings

Method used

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  • Preparation method of premixed reinforced asphalt mixture
  • Preparation method of premixed reinforced asphalt mixture

Examples

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preparation example Construction

[0016] A preparation method for ready-mixed enhanced asphalt mixture, specifically comprising the following steps:

[0017] According to the ratio requirements of the project, first mix the aggregate and fiber evenly, then add soft asphalt and mix evenly, then add hard natural asphalt and mix evenly, and finally add mineral powder and mix evenly.

[0018] The aggregate is one or more of basalt, limestone and igneous rock.

[0019] The ore powder is limestone.

[0020] The fibers are lignin flocculent fibers, and the dosage is 0.1% to 0.3% of the mass of the aggregate.

[0021] Wherein the soft asphalt is Zhonghai 110 base asphalt.

[0022] The hard natural asphalt used is one of Trinidad Lake asphalt (code T), Qingchuanyan asphalt (code Q), and commonly used natural asphalt.

[0023] The aggregate and fiber mixing time is 10-15s.

[0024] Among them, the stirring time after adding the soft asphalt is 55-65s.

[0025] Among them, the mixing time after adding natural hard a...

Embodiment 1

[0032] First, mix the aggregate AC-13 and fiber evenly, the fiber content is 0.1% of the aggregate mass, and the mixing time is 10s, then add Zhonghai 110# soft asphalt and mix evenly, the mixing time is 55s, and then add 25% The Trinidad Lake asphalt is mixed evenly, and the mixing time is 55s. Finally, mineral powder is added to mix evenly, and the mixing time is 45s.

example 2

[0034] A preparation method for ready-mixed-reinforced asphalt mixture, comprising the following steps:

[0035] First, mix the aggregate SMA-13 ​​and fiber evenly, the fiber content is 0.2% of the aggregate mass, the mixing time is 11s, and then add Zhonghai 110# soft asphalt and mix evenly, the mixing time is 58s, and then add 25% The asphalt of Lake Trinidad was mixed evenly, and the mixing time was 58s. Finally, mineral powder was added and mixed evenly, and the mixing time was 48s. %.

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Abstract

The invention discloses a preparation method of a premixed reinforced asphalt mixture. During the production process of the mixture, soft asphalt and mineral materials are premixed, so that the mixture is good in construction and usability, natural asphalt powder is used for re-mixing, so as to enhance the pavement performance, on one hand, the soft asphalt is high in grade and low in viscosity, the soft asphalt is uniformly mixed with aggregate at a relatively low temperature and the fluidity is good; on the other hand, hard natural asphalt containing a large amount of minerals is selected in the re-mixing process, so that the high-temperature performance, the anti-aging performance and the anti-stripping performance of the mixture can be remarkably improved, thus the pavement performance of the asphalt mixture is improved, and the service life is prolonged. In addition, the natural asphalt is high in hardness, is dispersed in the mixture after being remixed, and plays a role of filling, extruding and reinforcing ribs and cooperates with fibers to improve the low-temperature performance of the asphalt mixture; the premixed reinforced asphalt mixture preparation and construction process is simple, so that expensive additives such as warm mixing agents are avoided, and the road performance is improved at the same time.

Description

technical field [0001] The invention belongs to the field of traffic and transportation engineering, and relates to a preparation method of ready-mixed reinforced asphalt mixture. Background technique [0002] my country's high-grade pavement is dominated by asphalt pavement. With the increase of traffic load, improving the road performance of asphalt mixture and improving the service life of roads are current research hotspots. The traditional asphalt mixture preparation method uses warm mixing technology, adding admixtures, etc., which damages part of the road performance of asphalt mixture, and the warm mixing technology is complicated, the admixture is expensive, and the warm mixing effect is difficult to evaluate. Therefore, it is urgent It is necessary to study new materials or new processes to alleviate the above shortcomings. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of ready-mixed enhanced asphalt m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2201/50
Inventor 张争奇李杨杨建华黄硕磊李卓琳
Owner CHANGAN UNIV
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