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Hot mix asphalt recycling agent as well as preparation method and application thereof

A kind of asphalt rejuvenator and hot mixing technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of poor compatibility, slow permeation and diffusion, etc., and achieve the goal of enhancing compatibility, scientific formula, and promoting comprehensive recovery Effect

Inactive Publication Date: 2014-03-05
HAINAN UNIVERSITY
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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 recycling agent as well as preparation method and application thereof

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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, the raw oil needs to be pretreated: use furfural extraction process to concentrate and separate the aromatic components, and obtain the aromatic-rich components 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 extraction.

[0046] The p...

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] Such asfigure 1 As 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 heate...

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 recycling agent as well as a preparation method and application thereof. The hot mix asphalt recycling agent comprises the following components in weight ratio: 65.0-85.0 parts of heavy oil, 10.0-30.0 parts of polymers, 1.0-1.5 parts of penetrant, 1.0-2.0 parts of anti-aging agent and 1.5-3.0 parts of anti-rut agent. The hot mix asphalt recycling agent contains the heavy oil with relatively high aroma component content, so that the compatibility between the hot mix asphalt recycling agent and waste and aged asphalt can be enhanced, and furthermore, the recycling effect of the hot mix asphalt recycling agent is ensured; due to the addition of the penetrant of the hot mix asphalt recycling agent, the mixing speed of the hot mix asphalt recycling agent and the aged asphalt is increased, the hot mix asphalt recycling agent and the aged asphalt can be sufficiently mixed within a short time, and the comprehensive recovery of the performance of the aged asphalt is promoted.

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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IPC IPC(8): C08L95/00C08L91/00C08L53/02C08K3/22C08K5/17C04B26/26
Inventor 李进
Owner HAINAN UNIVERSITY
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