Method of producing modified asphalt

A technology of modified asphalt and base asphalt, which is applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, the processing of tar asphalt/petroleum asphalt/natural asphalt by selective extraction, and the petroleum industry, etc. , Affect the performance of modified asphalt, time-consuming and other problems, to achieve the effect of easy recycling, reducing the degree of aging, and good dispersing or dissolving ability

Active Publication Date: 2012-06-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a hot mixing process is difficult to avoid the aging of the base asphalt to a certain extent, thus affecting the performance of the modified asphalt
It is also energy-consuming and time-consuming
In addition, grinding coal liquefaction heavy products is also energy-consuming and time-consuming
Although the source of heavy products of molten coal liquefaction can be directly obtained from the direct coal liquefaction process, the geographical location for the preparation of modified bitumen is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] At 50°C, the heavy coal liquefaction product R1 is fully dispersed with n-hexane (the weight ratio of n-hexane to R1 is 100:1), and then added to the base asphalt J1 at a weight ratio of 5% (R1 to modified asphalt) , mixed evenly, and then recovered the solvent in an 80°C water bath to obtain modified asphalt. The test results are shown in Table 3.

Embodiment 2

[0044] At room temperature, the coal liquefaction heavy product R2 is fully dispersed with dichloromethane (the weight ratio of dichloromethane to R2 is 50:1), and then added to the mixture with dichloromethane at a weight ratio of 10% (R2 to modified bitumen) Methyl chloride (the weight ratio of dichloromethane to base asphalt J1 is 1:1) was fully dispersed in base asphalt J1, mixed evenly, and then the solvent was recovered in a 50°C water bath to obtain modified asphalt. The test results are shown in Table 3.

Embodiment 3

[0046] At 60°C, the base asphalt J2 is fully dispersed with benzene (the weight ratio of benzene to J2 is 1.5:1), and then added to the heavy coal liquefaction product R3 (the weight ratio of R3 to the modified asphalt is 25%), Mix well, and then recover the solvent in a 90°C water bath to obtain modified asphalt. The test results are shown in Table 3.

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Abstract

A method of producing modified asphalt is characterized in that in a temperature range of from room temperature to 100 DEG C, organic solvent and/or mixed solvent oil capable of dispersing or dissolving coal liquefied heavy products and matrix asphalt are used for mixing the coal liquefied heavy products with the matrix asphalt prior to separation and recycling of the solvent so as to obtain the modified asphalt, wherein the coal liquefied heavy products added account for 5-50% of total percentage of the modified asphalt. The method has the advantage that the production temperature is low, and the modified asphalt has good performances.

Description

technical field [0001] The invention relates to a method for preparing modified asphalt. Background technique [0002] Because asphalt pavement has the characteristics of good driving comfort, excellent performance, fast construction speed, and convenient maintenance, more than 90% of expressways and first-class roads use asphalt pavement. Asphalt is used as a binder for asphalt pavement, and it is required not to flow in summer and not to crack in winter. [0003] With the rapid development of social economy, the requirements for asphalt pavement are also increasing. The single road petroleum asphalt has been difficult to withstand the increasing heavy traffic flow, which has affected the service life of the road surface. The use of high-performance modified asphalt is the development direction of modern highway construction. [0004] As an excellent imported asphalt modifier, Trinidad Lake Asphalt (TLA) has been generally recognized by the industry. Many developed coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/08C10C3/00
Inventor 杨建丽武蒙蒙刘振宇刘沐鑫李允梅牛宏贤杨勇张玉贞郭强李永旺
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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