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Rejuvenating agent, mixture and preparation for hot-in-place recycled asphalt

A technology of recycled asphalt and regenerated agent, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of low blending rate of old materials, high mixing temperature, and high cost of regenerated agent, and achieve good anti-stripping performance and old The effect of high material mixing rate and low cost

Active Publication Date: 2017-03-01
SUZHOU TOPOLINE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing hot-in-place regeneration technology for asphalt pavement has disadvantages such as high cost of regenerant, low blending rate of old materials, high mixing temperature, and poor spalling resistance of the regenerated pavement. Geothermal Recycled Asphalt Mixture

Method used

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  • Rejuvenating agent, mixture and preparation for hot-in-place recycled asphalt
  • Rejuvenating agent, mixture and preparation for hot-in-place recycled asphalt
  • Rejuvenating agent, mixture and preparation for hot-in-place recycled asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0033] Example A: Preparation of a rejuvenating agent for hot-in-place reclaimed asphalt.

[0034] Put the waste edible oil into the reaction kettle and heat it to 80-90°C; add epoxy fatty acid methyl ester, distilled tall oil and methyl silicone oil to the reaction kettle with the waste edible oil in the stirring environment, keep stirring for 20 -30min; heat the mixture in the reactor to 90-110°C, add furfural to extract the oil, stir for 3-5min, and discharge. The regenerant is preferably maintained at 70°C.

[0035] The ratio of each component in the regenerant is shown in Table 1 below.

[0036] Table 1: Formulas of regenerants for hot-in-place recycled asphalt

[0037]

[0038] According to the corresponding test standard method, the performance of the regeneration agent for hot-in-place asphalt regeneration of the present invention is measured, and the results are shown in Table 2 below.

[0039] Table 2: Performance test results of regenerant for hot-in-place re...

Embodiment B

[0042] Example B: Preparation of hot-in-place recycled asphalt mixture

[0043]Mix new mineral material, new asphalt, and anti-stripping agent to obtain a new mixture, and the temperature of the new mixture on site is controlled at 140-160°C.

[0044] Pavement pretreatment. Use forest fire extinguishers to blow off the floating dust on the secondary asphalt pavement that meets the design requirements of hot-in-place regeneration.

[0045] Milling of old asphalt road. A large area of ​​asphalt pavement is continuously heated by an asphalt pavement thermal regeneration heating machine, so that the average temperature of the pavement is higher than 120°C, which meets the requirements of the regeneration construction process and ensures that the aggregate will not be broken during plowing. Heating the milling machine, milling the old asphalt pavement and spraying the regeneration agent at the same time, stirring and loosening the old asphalt pavement with the milling machine t...

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Abstract

The invention relates to the technical field of road engineering materials, and particularly discloses a recycling agent for in-place hot recycled asphalt. The recycling agent comprises the following components in parts by weight: 35-50 parts of furfural extract oil, 25-35 parts of waste edible oil, 15-24 parts of epoxy fatty acid methyl ester, 5-8 parts of distilled tall oil and 1-2 parts of methyl silicone oil. The invention further discloses a preparation method of the recycling agent, an in-place hot recycled asphalt mixture of the recycling agent, and a preparation method of the in-place hot recycled asphalt mixture. The recycling agent is low in cost, the blending rate of a waste material for carrying out in-place hot recycling by using the recycling agent is high, the blending temperature is low, the construction performance of the mixture is good, and the anti-strip performance is good. Moreover, the preparation methods of the recycling agent and the mixture are simple, large-sized equipment does not need to be added, and the recycling agent is particularly applied to asphalt pavement recycling.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, and specifically discloses a regeneration agent for in-situ hot regeneration of asphalt, a mixture, and a preparation method thereof. Background technique [0002] In recent years, my country's road construction has achieved unprecedented development. By 2015, the total mileage of highways will reach 4.5 million kilometers, and the national expressway network will be basically completed. At the same time, due to the increase in traffic volume, increase in vehicle load or reaching the design service life, a large number of roads have entered the stage of maintenance, repair and reconstruction. [0003] Most of the high-grade highways that have been built or are under construction are asphalt pavement, and the traditional asphalt road maintenance mostly adopts the method of re-paving after excavating the surface layer or base layer by milling. Asphalt roads use a huge amount of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L83/04C08K5/1515C04B26/26E01C19/10
CPCY02P20/584
Inventor 牛艳辉闫玉蓉
Owner SUZHOU TOPOLINE TECH
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