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A kind of preparation method of flexible asphalt pavement material

A kind of asphalt pavement and flexible technology, which is applied in the field of preparation of flexible asphalt materials, can solve the problems of low early strength of cold-mix asphalt mixture, insufficient bonding degree, slow water evaporation, etc., achieve fast strength formation, improve bonding performance, Accelerates the effect of early strength development

Active Publication Date: 2017-05-10
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cold-mixed and cold-laid asphalt mixture obtained by the above-mentioned patent application scheme has a high load-carrying capacity, the asphalt mixture is mixed using the traditional one-time mixing process, and the thickness of the formed asphalt film is relatively thin, which is different from that of mineral aggregates. The degree of bonding is insufficient, and the water evaporates slowly after mixing and forming, so the early strength of the prepared cold mix asphalt mixture is low
And the asphalt needs to be heated and additives added during the mixing process, the process is complicated and the cost is high

Method used

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  • A kind of preparation method of flexible asphalt pavement material
  • A kind of preparation method of flexible asphalt pavement material
  • A kind of preparation method of flexible asphalt pavement material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Formula:

[0019] 64.2% of coarse aggregate, 21.3% of fine aggregate, 6.7% of emulsified asphalt, 2.6% of mineral powder, 2.6% of cement, and 2.6% of water; among them, the coarse aggregate is gravel with a particle size greater than 2.36mm, and the fine aggregate is Natural sand with particle size less than 2.36mm. The emulsified asphalt has a solid content of 71% and a standard viscosity of 50 Pa·s.

[0020] 2. Preparation method:

[0021] (1) Put the coarse aggregate and 9 / 13 of the total amount of mineral powder in a mixing pot and mix evenly, then add 4 / 13 of the total amount of water to moisten, then add 19 / 67 of the total amount of emulsified asphalt, and mix evenly Finally, pour it on an iron plate and spread it to a thickness of 1cm, and bake it at 60°C for 30 minutes to complete the first pre-coating of the coarse aggregate;

[0022] (2) Pour the coarse aggregate that has been pre-coated for the first time into the mixing pot, and then add 11 / 67 of the t...

Embodiment 2

[0029] 1. Formula:

[0030] 63.7% of coarse aggregate, 20.9% of fine aggregate, 6.7% of emulsified asphalt, 2.6% of mineral powder, and 3.5% of water; among them, coarse aggregate is crushed gravel with a particle size greater than 2.36 mm, and fine aggregate is crushed gravel with a particle size of less than 2.36 mm mm artificial sand. The emulsified asphalt has a solid content of 71% and a standard viscosity of 50 Pa·s.

[0031] 2. Preparation method:

[0032] (1) Put the coarse aggregate and 9 / 13 of the total amount of ore powder in a mixing pot and mix evenly, then add 8 / 35 of the total amount of water to moisten, then add 16 / 67 of the total amount of emulsified asphalt, and mix evenly Finally, pour it on an iron plate and spread it to a thickness of 1.5cm, and bake it at 60°C for 30 minutes to complete the first pre-coating of the coarse aggregate;

[0033] (2) Pour the coarse aggregate that has been pre-coated for the first time into the mixing pot, then add 11 / 67 of...

Embodiment 3

[0040] 1. Formula:

[0041] Coarse aggregate is 63.9%, fine aggregate is 21.3%, emulsified asphalt is 7.1%, mineral powder is 2.4%, cement is 2.5%, and water is 2.8%. Among them, coarse aggregate is slag with a particle size greater than 2.36mm, and fine aggregate is granular Stone chips with a diameter less than 2.36mm. The emulsified asphalt has a solid content of 71% and a standard viscosity of 50 Pa·s.

[0042] 2. Preparation method:

[0043] (1) Put the coarse aggregate and 17 / 24 of the total amount of ore powder in a mixing pot and mix evenly, then add 7 / 28 of the total amount of water to moisten, then add 21 / 71 of the total amount of emulsified asphalt, and mix evenly Finally, pour it on an iron plate and spread it to a thickness of 2 cm, and bake it at 60°C for 30 minutes to complete the first pre-coating of the coarse aggregate;

[0044] (2) Pour the coarse aggregate that has been pre-coated for the first time into the mixing pot, and then add 10 / 71 of the total am...

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Abstract

The invention relates to a method for preparing a flexible asphalt pavement material. The method consists of the following steps: (1) preparing required raw materials by weight percentage; (2) placing coarse aggregate and mineral powder in a stirring pot to mix evenly, and then Add water to moisten it, then add emulsified asphalt, mix it evenly, pour it on an iron plate and spread it to a thickness of 1-2 cm, bake it at 60°C for 30 minutes, and complete the first pre-coating of the coarse aggregate; (3) Pour the first pre-coated coarse aggregate back into the mixing pot, then add the emulsified asphalt, mix it evenly, pour it on the iron plate and spread it to a thickness of 1-2 cm, and leave it at room temperature for 1 hour to complete the second coarse aggregate. (4) Put the fine aggregate, cement and mineral powder in the mixing pot and mix them evenly, then add water to moisten them, then add the remaining emulsified asphalt and mix them evenly, and then put the coarse aggregates that have completed the secondary pre-coating. Add the ingredients to the mixing pot and stir. The flexible asphalt pavement material obtained by the method has the advantage of high early strength.

Description

technical field [0001] The invention relates to a composition of asphalt mortar containing a reaction product of an inorganic and an organic binder, in particular to a preparation method of a flexible asphalt material. Background technique [0002] Currently, most asphalt pavements are constructed using hot mix asphalt. The construction of hot-mix asphalt requires the mixed asphalt and aggregate to be heated above 160°C, which consumes a lot of energy and emits a large amount of gas that pollutes the environment, causing great harm to the health of construction workers. Aging to a certain extent weakens the related properties of asphalt. Based on this situation, emulsified asphalt cold mix pavement materials have gradually received widespread attention in the industry. However, the existing cold-mix asphalt pavement materials usually use emulsified asphalt with a solid content of 50%-60%. Generally, the thickness of the asphalt film is relatively thin, the cohesion of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B24/36C04B20/12
Inventor 吴旷怀张文慧谢若奇许木照蔡旭
Owner GUANGZHOU UNIVERSITY
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