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Coal pitch mixture and preparation method thereof

A technology of coal tar and mixture, which is used in building thermal insulation materials, building components, buildings, etc., can solve problems such as large energy fuels, and achieve the effects of improving high temperature performance, reducing construction temperature and reducing emissions

Active Publication Date: 2012-08-29
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From another point of view, aging of asphalt is inevitable under high temperature and aerobic conditions; asphalt and aggregates are heated to a high temperature of 160-180°C, which will inevitably consume a lot of energy and fuel

Method used

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  • Coal pitch mixture and preparation method thereof
  • Coal pitch mixture and preparation method thereof
  • Coal pitch mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Heat 70# base petroleum asphalt with a mass ratio of 77% to 150°C, add crushed and sieved coal tar pitch powder with a mass ratio of 15%, stir until the coal tar pitch is dissolved in petroleum pitch, add 3% magnesium alkylate, 5% Low-molecular-weight polyethylene is sheared at a speed of 4000r / min for 20 minutes, and the road coal tar pitch product is obtained by dissolving evenly.

Embodiment 2

[0037] Heat the 70# base petroleum asphalt with a mass ratio of 82% to 130°C, add crushed and sieved coal tar pitch powder with a mass ratio of 10%, stir until the coal tar pitch is dissolved in the petroleum pitch, add 4% zinc alkylate, 4% Low-molecular-weight polyethylene is sheared at a speed of 4000r / min for 30 minutes, and the road coal tar pitch product is obtained by dissolving evenly.

Embodiment 3

[0039] Heat 70# base petroleum asphalt with a mass ratio of 75% to 130°C, add crushed and sieved coal tar pitch powder with a mass ratio of 15%, stir until the coal tar pitch is dissolved in petroleum pitch, add 6% sodium alkylate, 4% Low-molecular-weight polyethylene is sheared at a speed of 4000r / min for 25 minutes, and the road coal tar pitch product is obtained by dissolving evenly.

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Abstract

The invention discloses a coal pitch mixture, which comprises road coal pitch and mineral aggregate, wherein the weight ratio of the road coal pitch to the mineral aggregate is 6-3:94-97; the road coal pitch consists of the following components in percentage by mass: 10-80 percent of coal pitch, 15-76 percent of petroleum pitch, 3-8 percent of alkyl acid or alkyl acid salt and 2-6 percent of low molecular weight polyethylene. The invention also discloses a preparation method of the coal pitch mixture. The temperature of the coal pitch mixture is reduced by 20-30 DEG C during mixing and construction compared with hot mixed pitch mixture; the emission of pitch gas can be obviously reduced and the effect of suppressing the toxicity of the coal pitch is achieved; and thermo-oxidative aging ofthe pitch is reduced and the aims of energy conservation and emission reduction are fulfilled. The obtained coal pitch mixture is easier to compact; and indexes such as compactness, water stability, high temperature performance and low temperature performance of a paved pavement are not less than those of the hot mixed pitch mixture of the same grade.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a low-temperature construction and energy-saving coal-tar pitch mixture suitable for road engineering construction. [0002] The present invention also relates to a preparation method of the above-mentioned coal tar pitch mixture. Background technique [0003] With the increasing traffic volume and load in our country, the requirements for road grade and quality of asphalt pavement are getting higher and higher. At the same time, with the continuous rise of international crude oil prices, the contradiction between supply and demand of oil and related products has become increasingly prominent, and my country is a country with large coal resources. The use of coal resources to replace related oil products will be the main trend of my country's future development. my country's current output of coal tar pitch has reached 2 million tons, accounting for more tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C08L95/00C08L23/06C08K5/09
Inventor 曹东伟张海燕杨志峰唐国奇范勇军何敏
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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