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A kind of low temperature recycled asphalt mixture and its preparation method

A technology of asphalt mixture and waste asphalt mixture, which is applied to building insulation materials, building components, buildings, etc., can solve the problems of waste of petroleum resources, short half-life of foamed asphalt regeneration technology, and slow strength increase, so as to realize the recycling of resources , good osmotic solubility, convenient transportation and use

Active Publication Date: 2017-08-25
路丰尚科(福建)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the method of maintenance and treatment was to mill the diseased road surface and then re-pave it. This will cause three major problems: first, stacking occupies the site and causes environmental pollution; second, it wastes a lot of non-renewable oil resources and re- The large amount of asphalt and stone materials required to pave asphalt concrete pavement will make us face huge resource pressure; the third is to destroy the ecological environment
[0004] The existing waste asphalt mixture cold recycled emulsified asphalt and foamed asphalt have the following problems: first, only the stone in the waste asphalt mixture is used, and the more valuable asphalt resources are not used; second, the emulsified asphalt and foamed asphalt recycled mixture Belonging to inorganic binder, the road performance is not as good as asphalt mixture, so it can only be used for the base course of the road
Therefore, the cold recycling process of emulsified asphalt and foamed asphalt only uses mineral materials for waste asphalt mixture, but the asphalt resources with higher value have not been fully utilized, and the recycling of waste asphalt mixture resources is not thorough enough, and has a large Development and utilization of space
[0005] In addition, the existing emulsified asphalt cold recycling technology still has problems such as complex production process, easy demulsification, poor construction workability, and slow strength increase; the foamed asphalt recycling technology has the problems of short half-life and poor construction workability. Technical difficulties faced by technicians in the field of cold recycling of waste asphalt mixture

Method used

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  • A kind of low temperature recycled asphalt mixture and its preparation method
  • A kind of low temperature recycled asphalt mixture and its preparation method
  • A kind of low temperature recycled asphalt mixture and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]1. Preparation process of low-temperature recycled asphalt binder: use emulsified asphalt equipment unit (or equipment with forced mixing performance) to produce, first heat 70# asphalt to 130-140°C in the asphalt tank, and flow through the flow meter at 60 parts Proportional output. In the aromatic hydrocarbon oil solvent tank, add 1 part of SBS modifier and 0.3 parts of surfactant in sequence, stir thoroughly for 10 minutes, output through the flow meter at a flow ratio of 40 parts, and grind and mix with asphalt through a colloid mill (or forced mixing equipment) , and then through the cooling equipment to cool the mixture to below 90°C, the low-temperature recycled asphalt binder is obtained, and the technical indicators are shown in Table-1.

[0031] Table-1 Technical indicators of low temperature recycled asphalt binder

[0032]

[0033] It can be seen from Table 1 that the kinematic viscosity of the regenerant is 2200mm at 25°C 2 / s, has good liquidity, and a...

Embodiment 2

[0043] 1. Preparation process of low-temperature recycled asphalt binder: use emulsified asphalt equipment unit (or equipment with forced mixing performance) to produce, first heat 70# asphalt to 130-140°C in the asphalt tank, and flow through the flow meter at 65 parts Proportional output. In the aromatic hydrocarbon oil solvent tank, add 2 parts of SBS modifier and 0.4 parts of surfactant in sequence, stir thoroughly for 10 minutes, output through the flow meter at a flow ratio of 35 parts, and grind and mix with asphalt through a colloid mill (or forced mixing equipment) , and then cool the mixture to below 90°C through cooling equipment to obtain a low-temperature recycled asphalt binder. The technical indicators are shown in Table-4.

[0044] Table-4 Technical indicators of low temperature recycled asphalt binder

[0045]

[0046] It can be seen from Table-4 that the kinematic viscosity of the regenerant is 2785mm at 25°C 2 / s, has good liquidity, and all indicators ...

Embodiment 3

[0052] 1. Preparation process of low-temperature recycled asphalt binder: use emulsified asphalt equipment unit (or equipment with forced mixing performance) to produce, first heat 70# asphalt to 130-140°C in the asphalt tank, and flow through the flow meter at 70 parts Proportional output. In the aromatic hydrocarbon oil solvent tank, add 3 parts of SBS modifier and 0.5 parts of surfactant in sequence, stir thoroughly for 10 minutes, output through the flow meter at a flow ratio of 30 parts, and grind and mix with asphalt through a colloid mill (or forced mixing equipment) , and then through the cooling equipment to cool the mixture to below 90°C, the low-temperature recycled asphalt binder is obtained, and the technical indicators are shown in Table-6.

[0053] Table-6 Technical indicators of low temperature recycled asphalt binder

[0054]

[0055] It can be seen from Table-6 that the kinematic viscosity of the regenerant is 3650mm at 25°C 2 / s, has good liquidity, and...

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Abstract

The invention relates to a low-temperature recycled asphalt mixture and a preparation method thereof. The method mainly uses a low-temperature recycled asphalt binder, including: 60-70 parts of petroleum asphalt, 30-40 parts of aromatic oil, 1-3 parts of thermoplastic elastomer, and 0.3-0.5 parts of surfactant. The invention develops the low-temperature regenerated asphalt mixture prepared by using the low-temperature regenerated asphalt binder. First, the waste asphalt mixture can be fully regenerated, not only using stone resources, but also utilizing the original aged asphalt resources to the greatest extent; Recycled asphalt mixture has the performance of new asphalt mixture, and can be used for the base layer and bottom layer of the road to maximize the value of recycling waste asphalt mixture.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a low-temperature recycled asphalt mixture and a preparation method thereof. Background technique [0002] my country's highway construction is rapid, and the total mileage of high-grade highways has jumped to the second place in the world, and is increasing at a rate of 1×104km every three years. Due to the comprehensive effect of traffic load and natural factors, after a certain number of years of use, the surface layer of asphalt pavement gradually becomes thinner and gradually aging, and various diseases such as network cracks, subsidence, rutting, and wrapping will appear and gradually expand, seriously Affect driving safety. The general design life of asphalt concrete pavement is 15 years. In fact, the service life is usually only about 10 years. That is to say, every 10 to 15 years, asphalt concrete pavement needs to be renovated once. In the past, the method of maintenan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L53/02C08L9/06C04B26/26
Inventor 王立志
Owner 路丰尚科(福建)新材料有限公司
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