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Method for Improving Low Temperature Performance of Coal Direct Liquefaction Residue Modified Bitumen

A technology for direct liquefaction of coal and modified asphalt, which is used in building thermal insulation materials, building components, buildings, etc. research and other issues, to achieve the effect of low price, increased added value and excellent performance

Active Publication Date: 2017-06-23
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an asphalt modifier, the direct liquefaction residue of coal makes the low temperature performance of asphalt drop sharply
At present, the research on the residue of direct coal liquefaction still stays in the research of its modification effect on asphalt, and does not involve the research on improving the low temperature performance of asphalt modified by the residue of direct coal liquefaction

Method used

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  • Method for Improving Low Temperature Performance of Coal Direct Liquefaction Residue Modified Bitumen
  • Method for Improving Low Temperature Performance of Coal Direct Liquefaction Residue Modified Bitumen
  • Method for Improving Low Temperature Performance of Coal Direct Liquefaction Residue Modified Bitumen

Examples

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Effect test

Embodiment 1

[0057] A method for improving the low-temperature performance of coal direct liquefaction residue modified bitumen, which comprises the following steps in sequence:

[0058] Step 1: Test the properties of coal direct liquefaction residue and matrix bitumen;

[0059] Step 2: adding different amounts of coal direct liquefaction residue to the base asphalt to prepare coal direct liquefaction residue modified asphalt;

[0060] Step 3: Use the penetration graded evaluation system and the PG graded evaluation system to jointly evaluate the performance of the coal direct liquefaction residue modified asphalt, and determine the optimal addition amount of the coal direct liquefaction residue;

[0061] Step 4: adding an optimal amount of coal direct liquefaction residue to the matrix asphalt to prepare coal direct liquefaction residue modified asphalt;

[0062] Step 5: Add different amounts of modifiers to improve the low-temperature performance to the modified asphalt from the residue...

Embodiment 2

[0082] A method for improving the low-temperature performance of coal direct liquefaction residue modified bitumen, which comprises the following steps in sequence:

[0083] Step 1: Test the properties of coal direct liquefaction residue and matrix bitumen;

[0084] Step 2: adding different amounts of coal direct liquefaction residue to the base asphalt to prepare coal direct liquefaction residue modified asphalt;

[0085] Step 3: Use the penetration graded evaluation system and the PG graded evaluation system to jointly evaluate the performance of the coal direct liquefaction residue modified asphalt, and determine the optimal addition amount of the coal direct liquefaction residue;

[0086] Step 4: adding an optimal amount of coal direct liquefaction residue to the matrix asphalt to prepare coal direct liquefaction residue modified asphalt;

[0087] Step 5: Add different amounts of modifiers to improve the low-temperature performance to the modified asphalt from the residue...

Embodiment 3

[0106] A method for improving the low-temperature performance of coal direct liquefaction residue modified bitumen, which comprises the following steps in sequence:

[0107] Step 1: Test the properties of coal direct liquefaction residue and matrix bitumen;

[0108] Step 2: adding different amounts of coal direct liquefaction residue to the base asphalt to prepare coal direct liquefaction residue modified asphalt;

[0109] Step 3: Use the penetration graded evaluation system and the PG graded evaluation system to jointly evaluate the performance of the coal direct liquefaction residue modified asphalt, and determine the optimal addition amount of the coal direct liquefaction residue;

[0110] Step 4: adding an optimal amount of coal direct liquefaction residue to the matrix asphalt to prepare coal direct liquefaction residue modified asphalt;

[0111] Step 5: Add different amounts of modifiers to improve the low-temperature performance to the modified asphalt from the residue...

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Abstract

The invention discloses a method for improving the low-temperature performance of coal direct liquefaction residue modified asphalt, comprising the following steps in sequence: testing the performance of coal direct liquefaction residue and matrix asphalt; adding an optimal amount of coal direct liquefaction to the matrix asphalt Modified asphalt from residues of direct coal liquefaction; Add different amounts of modifiers to improve low-temperature performance in asphalt modified from direct coal liquefaction residues to prepare composite modified asphalt; Penetration graded evaluation system was used to evaluate composite modified asphalt. According to the performance of permanent asphalt, determine the best modifier and the best addition amount of modifier; add the best amount of modifier to the modified asphalt of coal direct liquefaction residue to prepare composite modified asphalt; The graded evaluation system evaluates the effect of modifiers on the low temperature performance of asphalt modified by coal direct liquefaction residue. The method of the invention is simple and practical, and has positive significance for increasing the added value of the coal direct liquefaction residue and for its secondary rational development into an asphalt modifier.

Description

technical field [0001] The invention belongs to the technical field of preparation of road building materials, and relates to a method for improving the low-temperature performance of asphalt, in particular to a method for improving the low-temperature performance of asphalt modified by direct coal liquefaction residue. Background technique [0002] Direct Coal Liquefaction Residue (DCLR for short) 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 high-ash, high-sulfur, high-carbon and Substances with high calorific value are composed of four components: heavy oil, asphaltene, pre-asphaltene and tetrahydrofuran insoluble matter, of which heavy oil and asphaltenes account for 30-50%. [0003] Since the early 1970s, people began to study the influence of coal direct liquefaction residue as a modifier on asphalt properties. Wang Zhaixia and others studied the modification effect of coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L9/06
Inventor 季节石越峰索智李鹏飞徐世法许鹰
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE