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

AI Technical Summary

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

Method used

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

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Example Embodiment

[0044] The invention provides a method for preparing the hot-mix asphalt regenerant, which includes the following steps: high-speed shearing of heavy oil and polymer at 120-180°C; then mixing and dispersing with anti-aging agent and anti-rutting agent, Then cool to 70-90°C; then add penetrant to fully stir and mix to prepare hot mix asphalt regenerant. Add penetrant after cooling to 70-90℃ to prevent the penetrant from decomposing at high temperature.

[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: the furfural extraction process is used to concentrate and separate the aromatic components, and the obtained aromatic-rich components are used for regeneration The heavy oil component of the agent. In order to increase the aromatic content of the heavy oil, the pretreatment of the feedstock oil can also use propane or butane supercritical extraction.

[0046] The pre...

Example Embodiment

[0048] Example 1

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

[0050] This embodiment provides a hot-mix asphalt regenerant for hot-mix regeneration of asphalt planing material, including the following components by weight ratio:

[0051] 70.0 parts of heavy oil;

[0052] 20.0 parts of polymer;

[0053] Penetrant 1.0 part;

[0054] Anti-aging agent 1.5 parts;

[0055] Anti-rutting agent 2.0 parts.

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

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

Example Embodiment

[0059] Example 2

[0060] This embodiment provides a hot-mix asphalt regenerant for hot-mix regeneration of asphalt planing material, including the following components by weight ratio:

[0061] 75.0 parts of heavy oil;

[0062] 15.0 parts of polymer;

[0063] Penetrant 1.2 parts;

[0064] 18 parts of anti-aging agent;

[0065] Anti-rutting agent 1.8 parts.

[0066] The aromatic content in the heavy oil is greater than 85wt%, and the average molecular weight Mn is between 280-400. The polymer is linear SBS (styrene-based thermoplastic elastomer). The penetrant is a polyether nonionic surfactant. The ageing agent in this embodiment uses tallow-based propylene diamine. The anti-rutting agent PR anti-rutting agent.

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

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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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