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Coal direct liquefaction residue modified asphalt mixture and its preparation method

A technology of direct coal liquefaction and modified asphalt, which is applied in the field of road construction materials preparation, can solve the problems of the research on the modification of asphalt and the modification of asphalt mixture that does not involve the residue of direct coal liquefaction, and achieves obvious economic benefits and social benefits. Benefits, important social and economic benefits, unique design ideas

Active Publication Date: 2017-06-30
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the residue of direct coal liquefaction still stays in the research on its modification effect on asphalt, and does not involve the research on the modification of asphalt mixture by the residue of direct coal liquefaction

Method used

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  • Coal direct liquefaction residue modified asphalt mixture and its preparation method
  • Coal direct liquefaction residue modified asphalt mixture and its preparation method
  • Coal direct liquefaction residue modified asphalt mixture and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] According to an embodiment of the coal direct liquefaction residue modified asphalt mixture of the present invention, it contains aggregates and mineral powder, and also contains coal direct liquefaction residue modified asphalt, and each component raw material accounts for the direct coal liquefaction residue modified asphalt mixture The weight percent of the materials is 91.3% of the aggregate, 4% of the mineral powder, and 4.7% of the modified asphalt of the residue of coal direct liquefaction.

[0046] The aggregate includes coarse aggregate and fine aggregate, and the mass ratio of coarse aggregate to fine aggregate is 2.2:1. The coarse aggregate is basalt, the fine aggregate is machine-made sand, and the mineral powder is lime powder.

[0047] The coal direct liquefaction residue modified asphalt mixture in this embodiment can turn coal direct liquefaction residue into treasure, its road performance can meet the performance requirements of hot mix asphalt mixture,...

Embodiment 2

[0117] According to another embodiment of the direct coal liquefaction residue-modified asphalt mixture of the present invention, it contains aggregates and mineral powder, and also contains coal direct liquefaction residue-modified asphalt, and each component raw material accounts for the total amount of the coal direct liquefaction residue-modified asphalt The weight percent of the mixed material is 95% of the aggregate, 1.5% of the mineral powder, and 3.5% of the modified asphalt with the residue of coal direct liquefaction. The aggregate includes coarse aggregate and fine aggregate, and the mass ratio of coarse aggregate to fine aggregate is 2.5:1.

[0118] The preparation method of the coal direct liquefaction residue modified asphalt mixture in this embodiment is the same as that of the first embodiment, except that in the second step, when preparing the coal direct liquefaction residue modified asphalt, the heating temperature of the base asphalt is 130°C, the heating t...

Embodiment 3

[0120] According to another embodiment of the direct coal liquefaction residue-modified asphalt mixture of the present invention, it contains aggregates and mineral powder, and also contains coal direct liquefaction residue-modified asphalt, and each component raw material accounts for the total amount of the coal direct liquefaction residue-modified asphalt The weight percent of the mixture is 93% of aggregate, 2% of mineral powder, and 5% of modified asphalt with residue of coal direct liquefaction. The aggregate includes coarse aggregate and fine aggregate, and the mass ratio of coarse aggregate to fine aggregate is 2.0:1.

[0121] The preparation method of the coal direct liquefaction residue modified asphalt mixture in this embodiment is the same as that of the first embodiment, except that in the second step, when preparing the coal direct liquefaction residue modified asphalt, the heating temperature of the base asphalt is 120°C, the heating temperature of the direct co...

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Abstract

The invention discloses a direct coal liquefaction residue-modified asphalt mixture, which is prepared from the following raw materials in percentage by weight: 91 to 95 percent of aggregate, 1.5 to 4 percent of mineral powder and 3 to 5 percent of direct coal liquefaction residue-modified asphalt. The invention also discloses a preparation method of the direct coal liquefaction residue-modified asphalt mixture, and the steps of preparation are as follows in sequence: preparing direct coal liquefaction residue-modified asphalt; pre-processing the direct coal liquefaction residue-modified asphalt, the aggregate and the mineral powder; blending direct coal liquefaction residue-modified asphalt of different amounts with the aggregate, and adding mineral powder for blending, so as to prepare a direct coal liquefaction residue-modified asphalt mixture; determining the optimal amount of the direct coal liquefaction residue-modified asphalt through comprehensive evaluation; blending the direct coal liquefaction residue-modified asphalt of the optimal amount with the aggregate, and adding the mineral powder for blending, so as to prepare the direct coal liquefaction residue-modified asphalt mixture. By adopting the technical scheme provided by the invention, direct coal liquefaction residue can be changed from waste into wealth, and obvious economic benefit and social benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of road construction materials, and in particular relates to a modified asphalt mixture and a preparation method thereof by coal direct liquefaction residue. Background technique [0002] Direct Coal Liquefaction Residue (DCLR) is an unavoidable heavy by-product in the process of direct coal liquefaction, accounting for about 30% of the total raw coal. my country will produce a large amount of coal direct liquefaction residue every year, and Shenhua Group alone produces 1.176 million tons per year. Such a large amount of coal direct liquefaction residues cannot be rationally utilized, and are often disposed of directly as garbage, resulting in waste of resources and pollution of the environment. [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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 季节徐世法王迪石越峰索智许鹰
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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