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In-place hot-regenerated asphalt regenerant and preparation method thereof

A technology of recycled asphalt and rejuvenating agent, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of unsatisfactory stability and anti-secondary aging performance, and limited performance of rejuvenating agent, so as to improve the anti-aging performance. Secondary aging performance, improved anti-oxidation performance, good compatibility

Inactive Publication Date: 2019-01-25
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of existing rejuvenators is limited, including stability, anti-secondary aging performance, and performance of asphalt modification on the basis of restoring asphalt performance.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0033] A method for preparing a hot-in-situ regenerated asphalt regenerant, comprising the following steps: mixing petroleum oil, industrial white oil, extracted oil, SBS, modifier, antioxidant and stabilizer, heating to 150-160 DEG C, and stirring and mixing , After standing for cooling, the asphalt regeneration agent can be regenerated hot in place.

[0034] The specific preparation method of the hot-in-place asphalt regeneration agent is as follows: the petroleum oil, industrial white oil, extracted oil, SBS, modifier, antioxidant and stabilizer are mixed according to the mass ratio of 30-40:20-30:30-50: 1-2: 0.8-1: 0.5-0.7: 0.1-0.2 Weigh it, put it into a container with heating function, heat it to 150-160 ° C, and use a high-speed shearing machine for stirring and mixing. The speed of the high-speed shearing machine is 5000~ 6000r / min, shearing and stirring time 1-2 min, and finally cooling at room temperature to obtain hot-in-place asphalt regeneration agent.

Embodiment 1

[0036] A method for preparing a hot-in-place regenerated asphalt rejuvenating agent, comprising the following steps.

[0037] (1) Extraction of petroleum oil: Mix petroleum pitch and n-pentane in a mass ratio of 1:20, stir at a temperature of 30 ° C for 0.4 h to form a solution, and after standing for 2 h, filter the solution to obtain filtrate I; Mix with sulfuric acid at a ratio of 1:1, stir evenly, stand for 2 hours, and filter to obtain filtrate II; place filtrate II at a temperature of 50 °C for 3 hours to volatilize the solvent in filtrate II, and the obtained residue is petroleum oil .

[0038] (2) Preparation of regenerant: Weigh petroleum oil, industrial white oil, extracted oil, SBS, modifier, antioxidant, and stabilizer according to the mass ratio of 30:20:30:1:0.8:0.5:0.1. Put it into a container with heating function, heat it to 150℃, use a high-speed shearing machine for stirring and mixing, the speed is 5000r / min, the shearing and stirring time is 1min, and fin...

Embodiment 2

[0041] A method for preparing a hot-in-place regenerated asphalt rejuvenating agent, comprising the following steps.

[0042](1) Extraction of petroleum oil: Mix petroleum pitch and n-pentane in a mass ratio of 1:20, stir at a temperature of 35 ° C for 0.4 h to form a solution, and after standing for 2 h, filter the solution to obtain filtrate I; Mix with sulfuric acid at a ratio of 1:1, stir evenly, stand for 2 hours, and filter to obtain filtrate II; place filtrate II at a temperature of 60 °C for 4 hours to volatilize the solvent in filtrate II, and the obtained residue is petroleum oil .

[0043] (2) Preparation of regenerant: Weigh petroleum oil, industrial white oil, extracted oil, SBS, modifier, antioxidant and stabilizer in a mass ratio of 40:30:50:2:1:0.7:0.2, Put it into a container with heating function, heat it to 160°C, use a high-speed shearing machine for stirring and mixing, the speed is 6000r / min, the shearing and stirring time is 2 min, and finally it is lef...

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PUM

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Abstract

The invention discloses an in-place hot-regenerated asphalt regenerant and a preparation method thereof. The recycled asphalt regenerant is prepared from petroleum oil, industrial white oil, extractedoil, SBS, a modifier, an antioxidant and a stabilizer in a weight ratio of (30 to 40): (20 to 30): (30 to 50): (1 to 2): (0.8 to 1): (0.5 to 0.7): (0.1 to 0.2). The in-place hot recycled asphalt recycling agent has the characteristics of good compatibility with aged asphalt, capability of effectively significantly restoring the performance of the aged asphalt, and good aging resistance, and is suitable for the construction of an in-place hot-regenerated asphalt mixed material.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and particularly relates to a hot-in-place regenerated asphalt regenerant and a preparation method thereof. Background technique [0002] With the development of my country's transportation industry and the increase in the service life of asphalt pavements, more and more asphalt pavements can no longer meet the requirements of use due to diseases or the need for improved road grades. In the current reconstruction of old asphalt roads, thermal regeneration is the mainstream of pavement regeneration, including hot-in-place recycling and factory-mixed hot recycling. Among them, the hot-in-place regeneration method refers to the use of special hot-in-place regeneration equipment to heat and mill the asphalt pavement, add a certain amount of rejuvenating agent and new asphalt mixture in situ, and then mix, spread, and roll in the hot state. and other processes, the road construction technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/06C08L53/02C08L63/10C08K5/13C08K5/14
CPCC08L95/00C08L2201/08C08L2205/035C08L91/06C08L53/02C08L63/10C08K5/13C08K5/14
Inventor 孙聪沈凡方四发黄绍龙郭鹏卢吉周锐刘冰尹炼姚昀王鑫
Owner WUHAN MUNICIPAL CONSTR GROUP
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