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A method of recycling waste asphalt

A technology for waste asphalt and recycled asphalt, applied in the field of waste asphalt regeneration, can solve the problems of long working hours and complicated operation steps, and achieve the effect of increasing the flash point and avoiding harmful gases.

Active Publication Date: 2020-11-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous method took too long and the operation steps were complicated

Method used

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  • A method of recycling waste asphalt

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Experimental program
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Effect test

Embodiment 1

[0037] A kind of asphalt regeneration method, the regeneration additive used is composed of, calculated in parts by weight:

[0038] Naphthenic oil 60%

[0039] Petroleum resin 30%

[0040] Ethyl Acrylate 2%

[0041] Methyl methacrylate 4%

[0042] Cellulose 2%

[0043] Styrene 2%.

[0044] Concrete asphalt regeneration method comprises the following steps:

[0045] The waste asphalt is milled from the road surface, crushed and screened,

[0046] Mix waste asphalt aggregates, fillers, asphalt emulsifiers, recycled asphalt additives, and stir and mix,

[0047] Compact the mixture described in the previous step;

[0048] The composition of the mixture comprises: 70% (weight) of waste asphalt, 23% (weight) of aggregate, 2% (weight) of filler, 1% (weight) of asphalt emulsifier, and 4% (weight) of recycled asphalt additive.

[0049] Portland cement is selected as aggregate; limestone is selected as filler; quaternary ammonium salt emulsifier is selected as asphalt emulsifie...

Embodiment 2

[0052] A kind of asphalt regeneration method, the regeneration additive used is composed of, calculated in parts by weight:

[0053] Naphthenic oil 70%

[0054] Petroleum resin 20%

[0055] Ethyl Acrylate 3%

[0056] Methyl methacrylate 3%

[0057] Cellulose 1%

[0058] Styrene 3%

[0059] Concrete asphalt regeneration method comprises the following steps:

[0060] The waste asphalt is milled from the road surface, crushed and screened,

[0061] Mix waste asphalt aggregates, fillers, asphalt emulsifiers, recycled asphalt additives, stir and mix, and compact the mixture described in the previous step;

[0062] The composition of the mixture includes: 60% (weight) of waste asphalt, 30% (weight) of aggregate, 2% (weight) of filler, 5% (weight) of asphalt emulsifier, and 3% (weight) of recycled asphalt additive.

[0063] Portland cement and steelmaking slag are selected as aggregates; slaked lime is selected as filler; alkylamide polyamine asphalt emulsifier is selected as ...

Embodiment 3

[0066] A kind of asphalt regeneration method, the regeneration additive used is composed of, calculated in parts by weight:

[0067]Naphthenic oil 60%

[0068] Petroleum resin 20%

[0069] Ethyl Acrylate 5%

[0070] Methyl methacrylate 5%

[0071] Cellulose 5%

[0072] Styrene 5%.

[0073] Concrete asphalt regeneration method comprises the following steps:

[0074] The waste asphalt is milled from the road surface, crushed and screened,

[0075] Mix waste asphalt aggregates, fillers, asphalt emulsifiers, recycled asphalt additives, stir and mix, and compact the mixture described in the previous step;

[0076] The composition of the mixture comprises: 65% (weight) of waste asphalt, 30% (weight) of aggregate, 2% (weight) of filler, 1% (weight) of asphalt emulsifier, and 2% (weight) of recycled asphalt additive.

[0077] Portland cement or steelmaking slag is used as aggregate; fly ash is selected as filler; quaternary ammonium salt emulsifier is selected as asphalt emulsi...

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Abstract

The invention relates to a waste asphalt mixture regeneration method. The method includes the following steps of milling a waste asphalt mixture from pavement, conducting crushing and screening, mixing waste asphalt aggregate, fillers, an asphalt emulsifier and a recycled asphalt additive, conducting stirring and mixing, and compacting the mixture above, wherein the mixture is composed of, by weight, 40-70% of the waste asphalt, 23-50% of the aggregate, 2-4% of the fillers, 1-5% of the asphalt emulsifier and 4-6% of the recycled asphalt additive, the flash point of the recycled asphalt additive is higher than 250 DEG C, the kinematic viscosity (35 DEG C, SFS) is 15-85, then the viscosity ratio after heating is 2.0-3.0%, and the change in weight after heating does not exceed 0.3%. The asphalt regeneration method using the additive can realize the waste asphalt regeneration process at the room temperature.

Description

technical field [0001] The present application relates to a method for regenerating waste asphalt, in particular to a method for regenerating pavement asphalt. Background technique [0002] After the asphalt pavement has experienced long-term rain, snow and rutting pressure, the internal structure of the pavement will undergo great changes, such as the decline in fatigue resistance, elasticity and strength. If the asphalt pavement is not repaired and regenerated in time, the structure of the pavement will be damaged, which will cause hidden dangers to driving safety. Asphalt pavement recycling technology refers to the old asphalt pavement that needs to be refurbished or discarded, after being excavated, recycled, heated, crushed and screened by special equipment for pavement regeneration, and regenerated agent, new asphalt, new aggregate, etc. in a certain proportion It is a complete process of re-mixing into a mixture to meet certain road performance and re-paving on the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L57/02C08L1/02
CPCC08L95/00C08L2205/035C08L2207/20C08L91/00C08L57/02C08L1/02
Inventor 刘宏富夏诚东黄拓杨新宇于华南黄梅芳杨晨熙
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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