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Composite fiber modified asphalt mixture with excellent performance, and preparation method thereof

A technology of composite fiber and modified asphalt, which is applied in the field of road engineering and can solve problems such as limited road performance

Inactive Publication Date: 2021-05-04
中电建路桥集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite fiber modified asphalt mixture with excellent performance and its preparation method, which solves the problem of limited road performance in the prior art by adding a single fiber stabilizer to the modified asphalt mixture. question

Method used

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  • Composite fiber modified asphalt mixture with excellent performance, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The composite fiber modified asphalt mixture with excellent performance is composed of the following raw materials in parts by weight:

[0030] 5 parts of SBS modified asphalt, 10 parts of mineral powder, 95 parts of aggregate, and 0.3 parts of composite fiber stabilizer;

[0031] Wherein, the composite fiber stabilizer includes lignin fibers, polyacrylonitrile fibers and sepiolite fibers in proportions by weight of 35:27:15;

[0032] Wherein, the aggregate comprises a weight ratio of 1:0.5 coarse aggregate and fine aggregate;

[0033] Its preparation method of composite fiber modified asphalt mixture with excellent performance comprises the following steps:

[0034] 1) Weigh each raw material according to the proportion by weight, then place the lignin fiber, polyacrylonitrile fiber and sepiolite fiber in the reaction kettle, and mechanically stir for 80 minutes to obtain the composite fiber stabilizer;

[0035] 2) Place the weighed SBS modified asphalt in an oven an...

Embodiment 2

[0039] The composite fiber modified asphalt mixture with excellent performance is composed of the following raw materials in parts by weight:

[0040]4.5 parts of SBS modified asphalt, 8 parts of mineral powder, 90 parts of aggregate, and 0.2 parts of composite fiber stabilizer;

[0041] Wherein, the composite fiber stabilizer includes lignin fibers, polyacrylonitrile fibers and sepiolite fibers in a weight ratio of 32:25:13;

[0042] Wherein, the aggregate comprises a proportion by weight of 1:0.4 coarse aggregate and fine aggregate;

[0043] Its preparation method of composite fiber modified asphalt mixture with excellent performance comprises the following steps:

[0044] 1) Weigh each raw material according to the proportion by weight, then place the lignin fiber, polyacrylonitrile fiber and sepiolite fiber in the reaction kettle, and mechanically stir for 60 minutes to obtain the composite fiber stabilizer;

[0045] 2) Place the weighed SBS modified asphalt in an oven a...

Embodiment 3

[0049] The composite fiber modified asphalt mixture with excellent performance is composed of the following raw materials in parts by weight:

[0050] 6 parts of SBS modified asphalt, 12 parts of mineral powder, 100 parts of aggregate, and 0.5 part of composite fiber stabilizer;

[0051] Wherein, the composite fiber stabilizer includes lignin fibers, polyacrylonitrile fibers and sepiolite fibers in proportions by weight of 38:29:17;

[0052] Wherein, the aggregate comprises a weight ratio of 1:0.6 coarse aggregate and fine aggregate;

[0053] Its preparation method of composite fiber modified asphalt mixture with excellent performance comprises the following steps:

[0054] 1) Weighing each raw material according to the proportion by weight, then putting the lignin fiber, polyacrylonitrile fiber and sepiolite fiber in the reaction kettle, and mechanically stirring for 100 minutes to obtain the composite fiber stabilizer;

[0055] 2) Place the weighed SBS modified asphalt in ...

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Abstract

The invention discloses a composite fiber modified asphalt mixture with excellent performance, and a preparation method thereof. The modified asphalt mixture is composed of, by weight, 4.5-6 parts of SBS modified asphalt, 8-12 parts of mineral powder, 90-100 parts of aggregate, and 0.2-0.4 part of a composite fiber stabilizer. The composite fiber stabilizer is composed of lignin fibers, polyacrylonitrile fibers and sepiolite fibers. The composite fiber stabilizer is prepared from the lignin fibers, the polyacrylonitrile fibers and the sepiolite fibers according to a certain ratio, the composite fiber stabilizer is added into the aggregate and then mixed with the SBS modified asphalt and the mineral powder to finally obtain the modified asphalt mixture. The composite fiber stabilizer is dispersed in the asphalt mixture and plays a role in complementing advantages and disadvantages in the aspect of improving the performance of the modified asphalt mixture, and the performance of the composite fiber stabilizer is greatly superior to that of the modified asphalt mixture and that of the modified asphalt mixture using a single fiber stabilizer; and great economic and social benefits are achieved in the aspects of reducing the construction cost, improving the use quality of the pavement and the like.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a composite fiber modified asphalt mixture with excellent performance and a preparation method thereof. Background technique [0002] The construction of highways is related to national economic development, social harmony and stability, especially in densely populated or economically underdeveloped areas, where highways play a vital role. Maintenance ability has become a big problem; because asphalt pavement has the advantages of smooth surface, no joints, small vibration, low noise, smooth and comfortable driving, easy maintenance and repair, etc., most of the urban roads built in my country in recent years use asphalt pavement. However, with the increasing urban population and various passenger vehicles, the traffic pressure on urban roads continues to increase, and many newly repaired asphalt pavements have many technical and quality problems after a short period of...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B14/46C04B16/02C04B16/06
CPCC04B26/26C04B14/4643C04B16/0658C04B16/02C04B2201/50C04B2111/0075C04B14/28C04B14/14
Inventor 舒万华程广杰廉虎山韩瑞祥范瑞马建宝董科江邓二文
Owner 中电建路桥集团有限公司
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