Granulated asphalt mixture additive as well as preparation method and application thereof

An asphalt mixture and additive technology, applied in the field of road engineering materials, can solve the problems of hardening, inconvenient use, unstable quality, etc., and achieve the effects of preventing hardening and improving dispersion performance and stability.

Pending Publication Date: 2022-07-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a granulated asphalt mixture additive, its preparation method and application. The agglomerated particles are convenient for storage, transportation and use, thereby solving the technical problems of hardening, inconvenient use and unstable quality of the existing granulated asphalt modifier due to quasi-storage conditions

Method used

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  • Granulated asphalt mixture additive as well as preparation method and application thereof
  • Granulated asphalt mixture additive as well as preparation method and application thereof
  • Granulated asphalt mixture additive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation method of the granulated asphalt mixture additive provided by the present invention comprises the following steps:

[0055] Heat the base asphalt binder to a fluid state, and mix it with the asphalt mixture modifier uniformly to form a mixed asphalt, so that the softening point of the mixed asphalt is between 90°C and 130°C;

[0056] The mixed asphalt is maintained at a temperature of 40°C to 70°C above the softening point temperature for granulation to obtain mixed asphalt additive particles; in a specific temperature range above the softening point, the fluidity of the mixed asphalt can be maintained at a stable level suitable for granulation. While maintaining the level after granulation, there is no need for additional temperature control, and the softness of the granule surface is suitable for coating the release agent.

[0057] After granulation, the mixed asphalt additive particles are quickly coated with antiblocking agent, and cooled to obtain t...

Embodiment 1 to 3

[0070] Embodiment 1 to 3 Heterogeneous phase asphalt mixture modifier and its preparation

[0071] The heterogeneous granulated asphalt mixture additive provided in this example includes asphalt modifier, base asphalt, and anti-blocking agent. The composition table is shown in the following table:

[0072]

[0073] The granulated asphalt mixture additives provided in the examples include asphalt modifiers and matrix asphalt, and the composition ratio table is shown in the following table:

[0074]

[0075]

[0076] The parameters of the release layer: Assuming that each particle is uniformly coated, the thickness of the release layer is obtained by dividing the mass of the release agent by the density of the release agent to obtain the volume of the release agent added, and then dividing the volume of the release agent by The N particle surface area yields the release agent thickness.

[0077]

[0078]

[0079] S k =2×πr 2 +2πr×L k

[0080] Where h is the t...

Embodiment 4 to 6

[0097] Embodiment 4 to 6 homogeneous phase asphalt mixture modifier and its preparation

[0098] The granulated asphalt mixture additive provided in this example includes asphalt modifier, base asphalt, and anti-blocking agent, and the composition table is shown in the following table:

[0099]

[0100]

[0101] The rubber powder used in this example is waste tire rubber powder with an average particle size of about 0.6 mm (passing through a 30-mesh sieve).

[0102] The granulated asphalt mixture additives provided in the examples include asphalt modifiers and matrix asphalt, and the composition table is shown in the following table:

[0103] Example Asphalt modifier base asphalt anti-sticking agent 4 50 50 0.2 5 60 40 0.2 6 70 30 0.2

[0104] The thickness of the release layer: Assuming that each particle is uniformly coated, the thickness of the release layer is obtained by dividing the mass of the release agent by the density ...

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Abstract

The invention discloses a granulated asphalt mixture additive. The granulated asphalt mixture additive comprises an asphalt mixture modifier, a matrix asphalt binder and an anti-sticking agent, the asphalt mixture modifier and the matrix asphalt binder are uniformly melted and mixed to form mixed asphalt additive particles; the surfaces of the asphalt mixture additive particles are coated with the anti-sticking agent to form an anti-sticking layer; the anti-sticking agent is water-insoluble powder, and the maximum particle size of the anti-sticking agent is smaller than 100 microns. The asphalt mixture additive is prepared into particles which are good in stability and not agglomerated under a high-temperature condition, and the particles are convenient to store, transport and use, so that the technical problems of hardening, inconvenience in use and unstable quality of an existing granulated asphalt modifier caused by storage conditions are solved.

Description

technical field [0001] The invention belongs to the field of road engineering materials, and more particularly relates to a granulated asphalt mixture additive, a preparation method and application thereof. Background technique [0002] Asphalt additives are additives used to improve the properties of asphalt and asphalt products. According to different purposes, asphalt additives usually add corresponding modifiers, anti-stripping agents, anti-aging agents, nano-modifiers, etc. to the base asphalt. [0003] Asphalt additives need to be pre-prepared in the proper proportion, and then added to the asphalt mixture in the proper proportion in the application scenario. Since asphalt additives require highly consistent formulations and production processes to ensure stable product performance, they usually need to be produced at a fixed location. When using, it needs to be added at the construction site, so transportation and storage are often required, and generally local fres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/36C04B20/10
CPCC04B40/0046C04B20/1074C04B20/1055C04B20/1066C04B20/107C04B24/36C04B26/26C04B2103/0068C04B2103/60
Inventor 吴少鹏赵增刚谢君刘全涛许实陈美祝庞凌陈安琪
Owner WUHAN UNIV OF TECH
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