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Method of preparing asphalt modifier with waste lubricant, gear oil and coal tar

A technology of asphalt modifier and waste lubricating grease, applied in the field of asphalt modifier, can solve the problems of short storage time and achieve the effects of low production cost, improved strength and toughness, and easy processing

Inactive Publication Date: 2019-04-05
佛山市光烨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses the modification of SBS and rubber powder as two modifiers, reduces the amount of SBS, and reduces the cost of modified asphalt, but still has the defect of short storage time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing asphalt modifier by using waste lubricating grease, gear oil and coal tar, mixing waste lubricating grease, gear oil and coal tar, using concentrated sulfuric acid as a catalyst, carrying out intermolecular dehydration reaction under heating conditions, and then Flocculation, precipitation, filtration, and drying to obtain asphalt modifier.

[0021] The consumption of the concentrated sulfuric acid is 0.1% of the total mass of waste lubricating grease, gear oil and coal tar.

[0022] The temperature of the reaction is 260° C., and the reaction time is 3 hours.

[0023] The molar ratio of the waste lubricating grease, gear oil and coal tar is determined by measuring the acid value of the reaction solution, so that the petroleum acid contained in the waste lubricating grease and gear oil is balanced with the coal tar phenolic acid contained in the coal tar.

[0024] The acid value of the reaction solution is less than 1 mgKOH / g.

[0025] An asphal...

Embodiment 2

[0027] The difference between this embodiment and the above-mentioned embodiment 1 is that the consumption of the concentrated sulfuric acid is 0.5% of the total mass of waste grease, gear oil and coal tar.

[0028] The temperature of the reaction is 280° C., and the reaction time is 2 hours.

Embodiment 3

[0030] The difference between this embodiment and the above-mentioned embodiment 1 is that the amount of concentrated sulfuric acid is 1.0% of the total mass of waste grease, gear oil and coal tar.

[0031] The temperature of the reaction is 300° C., and the reaction time is 1 h.

[0032] Heat 70# base asphalt to 180°C, add 5wt% of the asphalt modifier prepared in Example 1-3, and stir at 600r / min for 3 hours to obtain modified asphalt, respectively labeled as samples A, B and C; The control group added 5wt% SBS asphalt modifier.

[0033] The modified bitumen index that adopts bitumen modifier of the present invention to obtain is as follows:

[0034] Detection Indicator

[0035] It can be seen from the above data that after the base asphalt is added with the asphalt modifier of the present invention, from the performance index, while the softening point of the modified asphalt is greatly improved, the low-temperature ductility is obviously increased, the penetratio...

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Abstract

The invention relates to the technical field of asphalt modifiers, in particular to a method of preparing an asphalt modifier with waste lubricant, gear oil and coal tar. The method includes: mixing waste lubricant, gear oil and coal tar, using concentrated sulfuric acid as a catalyst to carry out intermolecular dewatering reaction under heating, flocculating, precipitating, filtering, and dryingto obtain the asphalt modifier. The waste lubricant, the gear oil and coal tar are used as raw materials; the concentrated sulfuric acid is used as the catalyst; the raw materials are low in price andeasy to attain; the production process is simple, convenient to perform and control and low in production cost. The asphalt modifier prepared herein helps improve strength and toughness of asphalt, improve pavement performance of an asphalt mixture at a high temperature, reduce permanent deformation at the high temperature, and improve the properties of the asphalt, such as rut resistance, fatigue resistance, aging resistance, resistance to low temperature cracking, and ability to resist low temperature fatigue.

Description

technical field [0001] The invention relates to the technical field of asphalt modifiers, in particular to a method for preparing asphalt modifiers by using waste lubricating grease, gear oil and coal tar. Background technique [0002] With the rapid development of the transportation industry, the traffic volume is increasing year by year, and the road load continues to increase. It is difficult for the traditional asphalt pavement to continue to meet the needs of modern traffic; as a new type of asphalt material, modified asphalt has been applied in practice. It is constantly upgrading and upgrading, and is gradually becoming the protagonist of highway construction at home and abroad. At present, the common modified asphalt mainly includes SBS modified asphalt and rubber modified asphalt. [0003] my country is the world's largest rubber consumer and the largest tire producer. According to statistics, in 2014, the output of tires in my country exceeded 562 million, while t...

Claims

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Application Information

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IPC IPC(8): C08L91/00C08L95/00
CPCC08L91/00C08L95/00
Inventor 袁勇雷聪
Owner 佛山市光烨环保科技有限公司
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