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Hot mix asphalt regenerant, its preparation method and use

An asphalt rejuvenator and hot mixing technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of slow permeation and diffusion, poor compatibility, etc., achieve scientific formula, enhance compatibility, and ensure regeneration effect Effect

Inactive Publication Date: 2016-09-07
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to propose a hot mix asphalt rejuvenator for the aforementioned hot mix asphalt rejuvenator. , in order to achieve good compatibility with aged asphalt, fast permeation and diffusion speed, can mix evenly with aged asphalt in a short time, and quickly dissolve each other, so that the properties of aged asphalt can be quickly and comprehensively restored, and the life of recycled asphalt concrete pavement can be improved

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  • Hot mix asphalt regenerant, its preparation method and use

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preparation example Construction

[0044] The invention provides a preparation method of the hot-mix asphalt rejuvenator, comprising the following steps: subjecting heavy oil and polymer to high-speed shearing at 120-180°C; mixing and dispersing with anti-aging agent and anti-rutting agent, Then cool to 70-90°C; then add penetrating agent and fully stir and mix to obtain a hot mix asphalt rejuvenator. After cooling to 70-90°C, adding penetrating agent can prevent high temperature decomposition of penetrating agent.

[0045] When the aromatic content in the heavy oil is less than 85wt%, in order to increase the aromatic content in the heavy oil, it is necessary to pretreat the raw oil: use the furfural extraction process to concentrate and separate the aromatic components, and the obtained aromatic-rich fractions are used for regeneration The heavy oil component of the agent. In order to increase the aromatic content in heavy oil, the pretreatment of raw oil can also use propane or butane supercritical extracti...

Embodiment 1

[0049] figure 1 It is a flow chart of the production process of the hot-mix asphalt rejuvenator of the present invention.

[0050] This example provides a hot-mix asphalt rejuvenator for hot-mix regeneration of asphalt shavings, which includes the following components by weight:

[0051] 70.0 parts of heavy oil;

[0052] Polymer 20.0 parts;

[0053] Penetrant 1.0 parts;

[0054] 1.5 parts of anti-aging agent;

[0055] Anti-rutting agent 2.0 parts.

[0056] The content of aromatic components in the heavy oil is greater than 90 wt%, and the average molecular weight Mn is between 300-350. The polymer is a star SBS (Styrenic Thermoplastic Elastomer). The penetrating agent is alkylphenol polyoxyethylene ether. The aging agent is sodium hydroxide. The anti-rutting agent PR anti-rutting agent.

[0057] like figure 1As shown, the preparation method of the hot-mix asphalt rejuvenator comprises the following steps: the heavy oil is heated in a heating storage tank; the heated ...

Embodiment 2

[0060] This example provides a hot-mix asphalt rejuvenator for hot-mix regeneration of asphalt shavings, which includes the following components by weight:

[0061] 75.0 parts of heavy oil;

[0062] Polymer 15.0 parts;

[0063] 1.2 parts of penetrant;

[0064] Anti-aging agent 18 parts;

[0065] Anti-rutting agent 1.8 parts.

[0066] The content of aromatic components in the heavy oil is greater than 85 wt%, and the average molecular weight Mn is between 280-400. The polymer is linear SBS (Styrenic Thermoplastic Elastomer). The penetrating agent is a polyether nonionic surfactant. In this embodiment, the aging agent adopts tallow propylene diamine. The anti-rutting agent PR anti-rutting agent.

[0067] The preparation method of the hot-mix asphalt rejuvenator includes the following steps: high-speed shearing of heavy oil and polymer at 180°C, mixing and dispersing with anti-aging agent and anti-rutting agent, and then cooling to 70°C; adding infiltration The hot mix as...

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Abstract

The invention provides a hot-mix asphalt rejuvenator, its preparation method and application. The hot-mix asphalt rejuvenator includes the following components by weight: 65.0-85.0 parts of heavy oil; 10.0-30.0 parts of polymer; 1.0-1.5 parts of anti-aging agent; 1.0-2.0 parts of anti-aging agent; 1.5-3.0 parts of anti-rutting agent. The hot-mix asphalt rejuvenator uses heavy oil with high aromatic content, which can enhance the compatibility between the hot-mix asphalt rejuvenator and waste and aged asphalt, thereby ensuring the regeneration effect of the hot-mix asphalt rejuvenator; The addition of penetrant improves the mixing speed of hot mix asphalt rejuvenator and aged asphalt, makes hot mix asphalt rejuvenator and aged asphalt fully mixed in a short time, and promotes the comprehensive recovery of aged asphalt performance.

Description

technical field [0001] The invention relates to asphalt regeneration technology, in particular to a hot-mix asphalt regeneration agent, its preparation method and application. Background technique [0002] Asphalt rejuvenator (ERA-c) is a new type of material suitable for early and mid-term road maintenance of asphalt pavement. According to the regeneration process, asphalt regenerants are divided into: hot mix asphalt regeneration (including factory hot mix regeneration and on-site hot mix regeneration) and cold regeneration, among which hot mix regeneration is more mature than cold regeneration technology, and the properties of asphalt concrete obtained by regeneration are better. The existing asphalt regeneration agent is mainly composed of heavy mineral oil or light oil, its content is between 60-95wt%, and secondly it also contains polymer, anti-stripping agent, stabilizer, anti-ultraviolet auxiliary agent and anti-aging agent. [0003] Usually the aged asphalt is soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L53/02C08K3/22C08K5/17C04B26/26
Inventor 李进
Owner HAINAN UNIV
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