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A kind of modified road asphalt and its production process

A road asphalt and modification technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of difficulty in large-scale production, ensure product quality, and high production costs, and achieve easy large-scale production, wide range of raw materials, and high production costs. low cost effect

Active Publication Date: 2016-05-25
山西中科化美科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method directly uses coal tar pitch as raw material without blending the components of coal tar pitch, so the performance of coal tar pitch road oil cannot be guaranteed from the raw material, so the performance of the produced coal tar pitch road oil is difficult to reach the level of high-grade road asphalt ; In addition, more synthetic rubber and synthetic resin need to be added, and the cost is higher
[0007] Some of the above-mentioned road asphalt prepared from coal tar pitch need to add petroleum asphalt as the main raw material, the production cost and raw material transportation cost are high, the source of raw material has the risk of market uncertainty, and it is difficult to produce on a large scale. At the same time, the compatibility of coal tar pitch and petroleum pitch The stability will also affect the performance of the product such as storage stability; some do not reconcile the components of the raw material asphalt, and it is difficult to ensure the quality of the product from the raw material; more additives such as synthetic resin and synthetic rubber need to be added, and the production cost is high.

Method used

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  • A kind of modified road asphalt and its production process
  • A kind of modified road asphalt and its production process
  • A kind of modified road asphalt and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 35 parts of coal tar pitch 1 and 35 parts of coal tar pitch 5 into the mixing reactor, raise the temperature in the mixing reactor to 100°C to soften the coal tar pitch; then 30 parts of coking solvent oil, and raise the temperature in the reactor Mix at 200°C for 0.5h.

[0038] The quality index of the prepared coal tar pitch mixed asphalt is as follows:

[0039]

[0040] The initial boiling point of the coking solvent oil used in this example is 264°C, the final boiling point is 411°C, and the distillate before 400°C accounts for 92.2%.

Embodiment 2

[0042] Add 14 parts of coal tar pitch 1 and 56 parts of coal tar pitch 6 into the mixing reactor, and raise the temperature in the mixing reactor to 100°C to soften the coal tar pitch; then 30 parts of coking solvent oil, and raise the temperature in the reactor Mix at 180°C for 2h.

[0043] The quality index of the prepared coal tar pitch mixed asphalt is as follows:

[0044]

[0045] The initial boiling point of the coking solvent oil used in this example is 264°C, the final boiling point is 411°C, and the distillate before 400°C accounts for 92.2%.

Embodiment 3

[0047]Add 17.5 parts of coal tar pitch 2 and 52.5 parts of coal tar pitch 7 into the mixing reactor, raise the temperature in the mixing reactor to 100°C to soften the coal tar pitch; then 30 parts of coking solvent oil, and raise the temperature in the reactor Mix at 250°C for 2.5h.

[0048] The quality index of the prepared coal tar pitch mixed asphalt is as follows:

[0049]

[0050] The initial boiling point of the coking solvent oil used in this example is 257°C, the final boiling point is 418°C, and the distillate before 400°C accounts for 90.6%.

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Abstract

The invention discloses modified road asphalt and a production process thereof, belonging to the technical field of road asphalt. The invention provides modified road asphalt which is low in cost, stable in storage and high in quality. The modified road asphalt comprises 10%wt-80wt% of intermediate-temperature coal tar asphalt, 10%wt-80wt% of high-temperature coal tar asphalt, 8%wt-40wt% of solvent oil, 1%wt-20wt% of rubber powder and 0.25%wt-10wt% of a crosslinking agent. The production process comprises the steps of firstly, respectively adding the intermediate-temperature coal tar asphalt and the high-temperature coal tar asphalt into a blending reactor to ensure that the temperature in the blending reactor raises to enable coal asphalt to be softened; and adding the rubber powder or SBS (Styrene Butadiene Styrene), and the solvent oil into a swelling reactor to ensure that the temperature in the swelling reactor raises, stirring to obtain swelling oil, then adding the swelling oil and the crosslinking agent into the blending reactor, and raising the temperature in the blending reactor to 150-250 DEG C and mixing for 0.5-3h. The modified road asphalt and the production process thereof are mainly applied to the aspect of the road asphalt.

Description

technical field [0001] The invention discloses a modified road asphalt and a production process, belonging to the technical field of road asphalt. Background technique [0002] In recent years, the production capacity of my country's coking industry has continued to expand. According to relevant statistics, the national coke output from January to October 2012 was 369 million tons, a year-on-year increase of 4.2%. In 2011, the national output of high-temperature coal tar was about 17.5 million tons, and the output of medium-low temperature coal tar was more than 4 million tons. Coal tar pitch is the solid residue left after coal tar is distilled to extract distillate oil, and the output is about 55% to 60% of the coal tar. In recent years, with the increase of domestic coal tar production, the production of coal tar pitch has also increased year by year. [0003] At present, domestic coal tar pitch is mainly used for forming binders for carbon materials and producing modi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L53/02
Inventor 王磊张伟赵亮富
Owner 山西中科化美科技有限责任公司