Separation extracting method of purified aged asphalt

A technology of aging asphalt and old asphalt, which is applied to building components, building insulation materials, buildings, etc., and can solve problems such as low centrifugal force, affecting the accuracy of original data, and inability to separate asphalt cleanly

Active Publication Date: 2016-08-24
JILIN JIAPENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the test (centrifugal separation method) of asphalt content in the asphalt mixture in the existing technology is because the centrifugal force is low, there is no clear time and specific requirements, the asphalt cannot be completely separated, and after centrifugation, it still contains very fine mineral powder.
When doing the index test of reduced asphalt, these fine mineral powders directly affect the accuracy of the original data, resulting in inaccurate dosage of regenerant added; especially in the case of serious aging of asphalt pavement
The method used is a small amount of correction method for comparison or data, which will lead to certain deviations in the results

Method used

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  • Separation extracting method of purified aged asphalt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Foaming, saponification and oil extraction operations are carried out first;

[0047] The ratio of the amount of trichlorethylene to the aged asphalt in the waste asphalt mixture is 46:1;

[0048] The mixing ratio of distilled trichlorethylene solution and aged asphalt is 14--16:1;

[0049] High-speed centrifuge 20000 rpm - 25000 rpm high speed, 55000x g - 65000x g centrifugal force;

[0050] The number of centrifugation is 3-5 times, and the centrifugation time is 30 minutes each time;

[0051] The high-temperature calcination method is used to detect that there is no mineral powder residue, and the aged asphalt meets the design requirements.

Embodiment 2

[0053] Foaming, saponification and oil extraction operations are carried out first;

[0054] The ratio of the amount of trichlorethylene to the aged asphalt in the waste asphalt mixture is 46:1;

[0055] The mixing ratio of distilled trichlorethylene solution and aged asphalt is 14--16:1;

[0056] High speed centrifuge 15000 rpm - 20000 rpm high speed, 30000x g - 40000x g centrifugal force;

[0057] The number of centrifugation is 3-5 times, and the centrifugation time is 30 minutes each time;

[0058] A small amount of mineral powder residue is detected by high-temperature calcination method.

Embodiment 3

[0060] Foaming, saponification and oil extraction operations are carried out first;

[0061] The ratio of the amount of vinyl chloride to the aged asphalt in the waste asphalt mixture is 35:1;

[0062] The mixing ratio of distilled trichlorethylene solution and aged asphalt is 10--12:1;

[0063] High-speed centrifuge 20000 rpm - 25000 rpm high speed, 55000x g - 65000x g centrifugal force;

[0064] The number of centrifugation is 3-5 times, and the centrifugation time is 30 minutes each time;

[0065] Use the high temperature calcination method to detect the residue of ore powder.

[0066] The present invention has undergone a large number of tests with different rotating speeds and different solution ratios, and the method of the present invention can completely solve the problem of residual mineral powder particles in the aged extracted asphalt.

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Abstract

The invention discloses a separation extracting method of purified aged asphalt. The separation extracting method comprises the following steps: adequately mixing trichloroethylene with a saponified waste asphalt mixture in a volume ratio of 46 to 1 to obtain a to-be-extracted mixture, and distilling the to-be-extracted mixture at 90-120 DEG C until the solid-liquid volume ratio is 16 to 1, so as to obtain a to-be-separated mixture; regulating the solid-liquid volume ratio of trichloroethylene to the waste asphalt mixture in the to-be-separated mixture to be (14-16) to 1, feeding the to-be-separated mixture into extraction equipment, separating for 3-5 times at 20000rpm-25000rpm to separate fine mineral powder particles to obtain processed aged asphalt, and distilling to remove trichloroethylene in the aged asphalt, so as to obtain the purified aged asphalt. By virtue of the separation extracting method, an accurate test result is provided for the accurate addition of asphalt concrete and three indexes of recycled asphalt.

Description

technical field [0001] The invention relates to the field of recycling waste asphalt, in particular to a separation and extraction method for purifying aged asphalt. Background technique [0002] The asphalt pavement built in China in the early stage has entered the period of maintenance and overhaul, and the waste asphalt concrete produced every year reaches tens of millions of tons. The recycling of these waste asphalt mixtures will produce huge environmental and economic benefits. However, there are still many unresolved problems in asphalt mixture recycling technology. One of them is that the asphalt recycling method has obvious shortcomings, mainly because the mineral powder cannot be completely removed, and there is no standard detection method for judging whether the mineral powder is completely removed. In the current technical design of old asphalt pavement regeneration, it is necessary to separate the aged asphalt of the old pavement from gravel and mineral powder....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08L95/00
CPCY02W30/62
Inventor 王志山高金龙宋波李旭东姜军
Owner JILIN JIAPENG GRP
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