Physical method for compatibilizing direct coal liquefaction residue modified asphalt

A technology of direct coal liquefaction and modified asphalt, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of restricting the application of DCLR, little research, and the decline of asphalt's low-temperature performance, so as to improve compatibility, The effect of convenient operation and low cost

Inactive Publication Date: 2019-01-22
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Season and others used SHRP PG, penetration grading system, infrared spectrometer, etc. to analyze the macroscopic properties and microstructure of DCLR and asphalt blends, and found that DCLR has a good effect on improving the high temperature performance of asphalt, but DCLR contains a large amount of THF insoluble substances, resulting in a decrease in the low-temperature performance of asphalt
[0007] There is no research on the application of DCLR in the modification of petroleum asphalt in foreign countries. The...

Method used

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  • Physical method for compatibilizing direct coal liquefaction residue modified asphalt
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  • Physical method for compatibilizing direct coal liquefaction residue modified asphalt

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Experimental program
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Embodiment 1

[0056] The technical indicators of DCLR, base asphalt (Shell-90) and aromatic oil were tested, and the results are shown in Table 1, Table 2 and Table 3.

[0057]

[0058] Table 1

[0059]

[0060] Table 2

[0061]

[0062] table 3

[0063] Table 1 Properties of DCLR, Table 2 Properties of Base Bitumen (Shell-90), Table 3 Properties of Aromatic Oil.

[0064] 12 kinds of DCLR modified asphalt samples were prepared by cross-combining 4 different dosages (2%, 4%, 6%, 8%) and 3 mixing methods (aromatic oil shear time: 90min, 45min, 0min) , to test the three major indicators, as shown in Table 4.

[0065]

[0066] Table 4

[0067] Table 4 records the basic properties of DCLR modified asphalt after adding aromatic oil.

[0068] Taking the low temperature ductility as the main control index, supplemented by the softening point and penetration index, through the range analysis of the above test results, the DCLR modified asphalt mixed with aromatic oil at different do...

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Abstract

The invention relates to a physical method for compatibilizing direct coal liquefaction residue modified asphalt, comprising the following steps: 1) testing various performance indexes of matrix asphalt, DCLR and aromatic hydrocarbon oil; 2) using DCLR as an asphalt modifier, adding different dosages of aromatic hydrocarbon oil, and preparing DCLR modified asphalt under different shear time conditions; 3) using low-temperature ductility as the main control index, supplemented by softening point and needle penetration index, and carrying out primary selection of the DCLR modified asphalt addedwith different dosages of aromatic hydrocarbon oil and at different shear times; 4) adding aromatic hydrocarbon oil into the DCLR modified asphalt according to the optimal dosage and the best shear time based on the results of primary selection, and carrying out dynamic shear rheological test by the use of a dynamic shear rheometer (DSR); and 5) making a Cole-Cole chart according to the DSR test results, and further judging the compatibilization effect of aromatic hydrocarbon oil on DCLR and petroleum asphalt. The physical compatibilization method proposed for DCLR modified asphalt is economical and practical, simple, easy to operate, low in energy consumption, low in cost and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of road construction materials, and relates to a method for improving the compatibility between the direct coal liquefaction residue and the petroleum asphalt by adding a physical compatibilizer to the residue of direct coal liquefaction and the petroleum asphalt. Background technique [0002] Direct coal liquefaction residue (direct coal liquefaction residue, DCLR) is the main by-product that is inevitably produced in the direct coal liquefaction process and accounts for 30% of the total raw coal. It is a kind of high ash, high sulfur, high carbon and high emission. It contains a lot of useful components such as asphaltene, heavy oil, tetrahydrofuran solubles, etc. It can be developed as a road petroleum asphalt modifier. [0003] Jin Zhuoyi introduced the process of DCLR to prepare modified asphalt, and pointed out the feasibility of DCLR as an asphalt modifier. [0004] Zheng Lizhen found that DCLR modified asphal...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L91/00
CPCC08L95/00C08L91/00
Inventor 季节李辉许鹰索智谢子详
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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