Method for modifying asphalt by concurrently using waste printed circuit board pyrolytic oil heavy fractions and styrene butadiene rubber

A technology of waste circuit boards and styrene-butadiene rubber is applied in the field of resource utilization of electronic waste, which can solve the problems of high price, increase the cost of asphalt use, increase the use of various road materials, etc., and achieves increased feasibility and asphalt. Overall performance improvement and cost reduction effect

Inactive Publication Date: 2013-04-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, most of the modifiers for asphalt use some expensive polymer materials. Although these materials can greatly improve the performance of asphalt, they increase the cost of asphalt. With the rapid development of urban roads, The use of various road materials is also increasing

Method used

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  • Method for modifying asphalt by concurrently using waste printed circuit board pyrolytic oil heavy fractions and styrene butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Put the circuit board with electronic components removed into a pyrolysis furnace, heat it to 450°C, keep it for 1 hour until it is completely pyrolyzed, and collect the pyrolysis oil produced after pyrolysis;

[0026] (2) Fractionate the circuit board pyrolysis oil at atmospheric pressure, and retain the high-temperature heavy fraction of the pyrolysis oil above 340°C. If the equipment conditions permit, the fractionation temperature of the heavy fraction can be increased to 360°C to reduce the volatile components in the heavy fraction;

[0027] (3) Grind and sieve the high-temperature heavy fraction of circuit board pyrolysis oil that is solid at room temperature, and select the heavy fraction powder greater than 200 meshes as an asphalt admixture;

[0028] (4) adding 2 parts by weight of circuit board pyrolysis oil heavy fraction to 98 parts by weight of 130-160°C hot petroleum asphalt, and insulated and stirred for 0.75 hours;

[0029] (5) Add 8 parts by weight ...

Embodiment 2

[0032] Same as Example 1, the difference is that in step (4), 5 parts by weight of circuit board pyrolysis oil heavy fraction is added as a modifier to 95 parts by weight of hot petroleum asphalt at 130-160 °C , heat-insulated and stirred for 0.75 hours; in the step (5), 5 parts by weight of SBR were added to the mixed asphalt prepared in the step (4) of 95 parts by weight. In asphalt, heat preservation and stirring for 0.75 hours to obtain modified asphalt.

[0033] The softening point of the modified asphalt is 50.4°C, the penetration is 6.86mm, the ductility at 15°C is 47.7cm, the Marshall stability is 15.7kN when the asphalt ratio is 4.5, and the dynamic stability of the rutting test is 3868.92.

Embodiment 3

[0035] Same as Example 1, the difference is that in step (4), 7 parts by weight of circuit board pyrolysis oil heavy fraction is added as a modifier to 93 parts by weight of hot petroleum asphalt at 130-160 °C , heat-insulated and stirred for 0.75 hours; in the step (5), 3 parts by weight of SBR were added to the mixed asphalt prepared in the step (4) of 97 parts by weight. In asphalt, heat preservation and stirring for 0.75 hours to obtain modified asphalt.

[0036] The softening point of the modified asphalt is 53.8°C, the penetration is 5.56mm, the ductility at 15°C is 40.2cm, the Marshall stability is 16.4kN when the asphalt ratio is 4.5, and the dynamic stability of the rutting test is 5123.04.

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Abstract

The present invention discloses a method for modifying asphalt by concurrently using waste printed circuit board pyrolytic oil heavy fractions and styrene butadiene rubber. According to the method, the waste printed circuit board pyrolytic oil high temperature heavy fractions are crushed into powder; the powder is adopted as a modifier; the modifier is added to the asphalt to improve the high temperature performance of the road asphalt; the styrene butadiene rubber is added to the asphalt to improve the ductility and the stability of the bituminous pavement. The method comprises: extracting the high temperature heavy fractions in the waste printed circuit board pyrolytic oil through the fractionation; crushing and screening the high temperature heavy fractions at a room temperature; selecting the heavy fraction powder having a particle size more than 200 meshes; mixing 2-10 parts by weight of the selected powder and 90-98 parts by weight of the petroleum asphalt; mixing and stirring 2-10 parts by weight of the styrene butadiene rubber and the prepared mixed asphalt for 0.5-1 hour to obtain the modified asphalt, wherein the stirring temperature is held to130-160 DEG C. According tothe present invention, the method for utilization of all components of the liquid product through printed circuit board pyrolysis treatment is provided, the performance of the asphalt is improved, and the cost of the modified asphalt is reduced.

Description

technical field [0001] The invention relates to a method for co-modifying asphalt with the heavy fraction of waste circuit board pyrolysis oil and styrene-butadiene rubber (SBR), and belongs to the technical field of resource utilization of electronic waste. Background technique [0002] At present, the world produces about 40 million tons of electronic waste every year, which is increasing at a rate three times that of other municipal waste. There are two main sources of waste printed circuit boards: on the one hand, my country is a big country in the manufacture and consumption of electronic and electrical products, and thousands of various circuit board factories will produce a large amount of circuit board waste; On the one hand, many electronic and electrical products are currently in or will enter the peak period of replacement and disposal. The output of waste electronic and electrical products is huge and the growth rate is very fast. In the process of dismantling and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06C08L91/00
Inventor 孙水裕杨帆钟胜宋卫锋戴文灿刘敬勇谢武明李神勇
Owner GUANGDONG UNIV OF TECH
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