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Coal asphalt material for paving high-grade road and preparation method of coal asphalt material

A technology of coal tar pitch and high grade is applied in the field of coal tar pitch material for grade road paving and its preparation. The effect of simple modification process

Active Publication Date: 2014-06-25
CCCCRUITONG ROAD & BRIDGE MAINTENANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, using coal tar pitch and coking solvent oil as the main raw materials, the coal tar pitch material is prepared by adding some polymer materials and anti-aging agents. The utilization rate of coal tar pitch is about 30wt%, and the amount of modifier Excessive size increases cost
Another example is to mix 10~45 wt% coal tar pitch and 55~90 wt% petroleum pitch in a colloid mill, then add SBS copolymer to the system to obtain road Coal tar pitch material is used, but the process of this material is complicated and the stability of the material is poor

Method used

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  • Coal asphalt material for paving high-grade road and preparation method of coal asphalt material
  • Coal asphalt material for paving high-grade road and preparation method of coal asphalt material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch, and heat it at 120°C to obtain a viscous substance;

[0030] Step 2: Add 5 parts by weight of plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 10 parts by weight of acid anhydride compound, and react at 120°C for 2 hours;

[0031] Step 3: Add 5 parts by weight of polyethylene glycol, react for another 2 hours, and dehydrate to obtain a high-grade coal tar pitch material for road paving.

[0032] In step one, the medium and low temperature coal tar pitch whose softening point is 65°C is selected;

[0033] In step 2, the plasticizer is selected from mono-anthracene oil, di-anthracene oil, mixed anthracene oil, and dioctyl phthalate;

[0034] In step 2, the acid anhydride compound is selected from maleic anhydride and tung oil anhydride;

[0035] In step 3, polyethylene glycol is selected from PEG 300 and PEG 400.

Embodiment 2

[0037] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch, and heat it at 135°C to obtain a viscous substance;

[0038] Step 2: Add 15 parts by weight of a plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 15 parts by weight of an acid anhydride compound, and react at a temperature of 150° C. for 2 hours;

[0039] Step 3: adding 10 parts by weight of polyethylene glycol, reacting for another 2 hours, and dehydrating to obtain a high-grade coal tar pitch material for road paving.

[0040] In step 1, the medium and low temperature coal tar pitch whose softening point is 80°C is selected;

[0041] In step 2, the plasticizer is selected from dioctyl terephthalate, octyl tridecyl phthalate, dicyclohexyl phthalate, trioctyl trimellitate, triglycerin trimellitate ester;

[0042] In step 2, the acid anhydride compound is selected from tungalic anhydride, polyazelaic anhydride, and trimellitic anhydride;

[0043] In step 3, polyethyl...

Embodiment 3

[0045] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch, and heat it at 150°C to obtain a viscous substance;

[0046] Step 2: Add 25 parts by weight of plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 20 parts by weight of acid anhydride compound, and react at 180°C for 3 hours;

[0047] Step 3: adding 15 parts by weight of polyethylene glycol, reacting for another 3 hours, and dehydrating to obtain a high-grade coal tar pitch material for road paving.

[0048] In step one, the medium and low temperature coal tar pitch whose softening point is 95°C is selected;

[0049] In step 2, the plasticizer is selected from epoxy soybean oil, tall oil, aromatic oil, animal oleic acid, vegetable oleic acid;

[0050]In step 2, the acid anhydride compound is selected from the adducts of trimellitic anhydride and bisphenol A (the curing agent prepared by mixing bisphenol A and trimellitic anhydride at a molar ratio of 1:2 at 180°C for 15 ...

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Abstract

The invention relates to a coal asphalt material for paving a high-grade road and a preparation method of the coal asphalt material. The existing preparation method of the coal asphalt has the defects of low coal asphalt utilization rate, large modifier dosage, high cost, complicated process, poor material stability and the like. The method disclosed by the invention comprises the following steps: taking mid-low temperature coal asphalt, and hotly melting to obtain a sticky substance; adding a plasticizer, and adding anhydride compounds and a lewis acid after agitating; adding polyethylene glycol after heating reaction, and then dewatering after reacting again, so as to obtain the coal asphalt material for paving the high-grade road. By adopting the process, the condensation phenomenon of the coal asphalt at high temperature is removed, and the low-temperature fragility and the cracking property of the coal asphalt are changed, meanwhile, the toxic properties of polycyclic aromatic hydrocarbon are greatly reduced, the additional value of the coal asphalt is increased, and favorable economic benefits can be generated.

Description

technical field [0001] The invention relates to a coal tar pitch material, in particular to a coal tar pitch material for high-grade road paving and a preparation method thereof. Background technique [0002] With the development of large-scale road construction, the demand for road construction materials is increasing day by day, especially the supply and quality of asphalt materials, which has become the lifeblood restricting the development of high-grade roads. Due to the rapid development of my country's national economy, the demand for energy continues to increase, the international crude oil price is rising steadily, and the price of petroleum asphalt is also increasing rapidly. However, in my country's energy consumption structure, coal accounts for about 70%, and the other two fossil fuels, oil and natural gas, account for about 20% and 3.5% respectively. For China, which is short of oil resources but rich in coal resources, the products of coal chemical industry Co...

Claims

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Application Information

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IPC IPC(8): C10C3/02
Inventor 陈团结张冬梅封强锁雷宇曹海波李永翔向豪张光普
Owner CCCCRUITONG ROAD & BRIDGE MAINTENANCE TECH
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