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
CN105174824BActive Publication Date: 2017-06-30BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
Publication Date
2017-06-30

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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.
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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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