CN101225237B

CN101225237B - Method for preparing modified asphalt by using waste plastics

Info

Publication number: CN101225237B
Application number: CN2008100693014A
Authority: CN
Inventors: 杨锡武; 曾顺友
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2010-07-14
Anticipated expiration: 2028-01-25
Also published as: CN101225237A

Abstract

The invention discloses a method for making modified asphalt using waste plastics, comprising the following process steps: 1) various waste plastics are collected, sorted, washed and then dehydrated and grinded; 2) the grinded waste plastics are melted by heating up, and then processed into waste plastic grains after cooling; 3) the waste plastic grains are liquefied by high temperature heating and then cooled, the waste plastic modifying agent is obtained; 4) base asphalt is healed to be softened, then the waste plastic modifying agent obtained during step 3) and the base asphalt are melted to be immixed; 5) the mixture obtained during the step 4) is melted to expanded and sheared, the manufacture of the modified asphalt is finished; the method for making modified asphalt using waste plastics has the advantages that: the soften point of the asphalt is increased ten to fifteen DEG C, the price is low, the waste domestic plastic products are changed into valuables, and has the advantages of good technical performances and low price and other economic technique characterizes.

Description

Make the method for modifying asphalt of waste or used plastics

Technical field

The present invention relates to a kind of making method of modifying asphalt, relate in particular to a kind of method of making modifying asphalt of waste or used plastics.

Background technology

The various plastic prods of producing as petroleum products comprise that daily life plastics bag, food pack, cement, fertilizer packaging bag, plastic sheeting for farm use, plastic tub plastic prods such as (bucket, stooles) are because output is big, cost is low, easy production, people generally do not use repeatedly, abandoned as rubbish but use promptly, make it become the one-time consumption product and become " white pollution ", abandoning of waste or used plastics not only influences environment, causing problem of environmental pollution, also is simultaneously the huge waste to petroleum resources.

The bituminous pavement of present considerable motorway and other standard highway promptly produced a large amount of rutting deformations and destroys after 3 or five years, reach its design service life far away, the stability at high temperature of asphalt mixture deficiency is the major cause that produces a large amount of ruts, and adopting modifying asphalt is high-temperature stability and the weather resistance that improves bituminous pavement, the main technique methods that reduces rut.

At present the modifying asphalt that adopts is because mostly the asphalt modifier that adopts is Chemicals, the price height, and the price of its modifying asphalt is also more expensive, and the pavement engineering investment is increased.

Environmental pollution, the wasting of resources and asphalt pavement rut serious problems based on above-mentioned waste or used plastics generation, the present invention utilizes the waste or used plastics making modifying waste plastic agent of recovery to be used for asphalt modification, improve pitch softening point, thereby improve the bituminous pavement high-temperature stability, reduce pavement track.With the modifying waste plastic agent produce that softening temperature is higher, high temperature resistance rut better performances, modified asphalt technology that price is lower, turn waste into wealth the protection environment; realize resource reutilization; improve simultaneously pitch and bituminous pavement technical feature again, prolong service life of road surface, save construction investment.

Summary of the invention

The invention provides a kind of waste or used plastics of recovery that utilizes and make the method that asphalt modifier is used for modifying asphalt, raising pitch softening point, improves the bituminous pavement high-temperature stability.This method may further comprise the steps:

1) the various waste or used plastics of collecting is classified and clean, dewater then, pulverize;

2) waste or used plastics granulation:, cool off post-treatment again and become particulate state the waste or used plastics elder generation heat fused after pulverizing;

3) heating makes its liquefaction to the waste or used plastics particle high-temperature, and cooling obtains the modifying waste plastic agent again;

4) the heating matrix pitch makes it softening, then modifying waste plastic agent that obtains in the step 3) and matrix pitch heating mixing;

5) mixture that obtains in the step 4) is melted bloated, high speed shear, modified asphalt manufacturing is finished.

Its processing parameter is as follows:

Step 2) in, to the waste or used plastics heat fused after pulverizing, temperature is 200 ℃, and be 30～45 minutes heat-up time.

In the step 3), be 250～350 ℃ to waste or used plastics particle Heating temperature, satisfy heat-up time: the waste or used plastics particle is liquefied fully.

In the step 4), the modifying waste plastic agent is in 8～10% ratio and matrix pitch mixing.

In the step 4), the Heating temperature of modifying waste plastic agent and matrix pitch Hybrid Heating and the softening temperature of matrix pitch are 170～180 ℃.

In the step 5), it is 15～30 minutes that mixture is melted the bloated time.

In the step 5), the time of mixture being carried out high speed shear is 30 minutes.

Useful technique effect of the present invention is: the economic technology characteristics that the performance that possesses skills is good, cheap: can make the bituminous softening temperature improve 10～15 ℃, thereby improve the high-temperature stability of asphalt, reduce the rut of bituminous pavement, its price is starkly lower than the SBS modifying asphalt, and the waste or used plastics in the life is turned waste into wealth.

Description of drawings

Accompanying drawing is a process flow sheet of the present invention.

Embodiment

According to the technical requirements to pitch and stability at high temperature of asphalt mixture of the characteristics of waste or used plastics complicated component and road surface, the present invention is made into the modifying waste plastic agent to waste or used plastics, again the modifying waste plastic agent is used to be made into modifying waste plastic pitch.

A kind of method of making modifying asphalt with waste or used plastics, its technical scheme is:

(1) collection of waste or used plastics and pulverizing: the waste or used plastics type of collection comprises plastics film, various household plastic bag, plastics (plastic tank, plastic tub, plastics stool), various woven bag, for ease of collecting and cleaning, elder generation's categorised collection, clean after collecting well, dewater then, pulverize;

(2) waste or used plastics granulation: its method is that the waste or used plastics of pulverizing is heated to fusing 30～45 minutes postcooling in back about 200 ℃, is processed into the waste or used plastics particle;

(3) the modifying waste plastic agent is made: solid waste or used plastics particle is heated to 250～350 ℃ of liquefaction postcooling, the modifying waste plastic agent completes, the principle of heat liquefaction is to make compact plastic molecules splitting of chain and loose, so that with the combining of asphaltene molecule, make that its modifying asphalt is stable does not emanate;

(4) modifying waste plastic pitch is made: earlier matrix pitch thermoplastic 170～180 ℃ the time, then the modifying waste plastic agent is added stirred vessel and matrix pitch heating mixing in 8～10% ratios, melting expands carries out the high speed shear mixing after 15～30 minutes, shear made pitch and modifying waste plastic agent thorough mixing evenly in 30 minutes after, the production of modifying waste plastic pitch is finished;

(5) standby the modifying waste plastic pitch that mixes input hold-up vessel (bucket), also can now produce existing usefulness, promptly and then mix and stir the storehouse and gravel aggregate mixes and stirs from hold-up vessel input by metering.

The technique effect of the inventive method and economic benefit mainly contain following some: the modifying waste plastic agent modified pitch that (1) makes of the inventive method can make the softening point of pitch improve 10～15 ℃, thereby improve the high-temperature stability of asphalt, (high-temperature stability of its asphalt is dynamic stability to reduce the rut of bituminous paving, close with the SBS performance of modified bitumen, but price is starkly lower than the SBS modified pitch), the good and lower technical and economic performance characteristics of price of the performance that possesses skills; (2) the Waste plastic modified asphalt storge quality is stable, and quality is easy to control, and production technology is simpler; (3) plastics of the present invention's employing are the waste or used plastics (various plastic packaging bags, film, basin, bucket, stool, toy etc.) that various household plastic goods produce, and turn waste into wealth, and protection of the environment economizes on resources.

Claims

1. method of making modifying asphalt with waste or used plastics, it is characterized in that: the processing step of this method comprises:

2) waste or used plastics granulation: the waste or used plastics elder generation heat fused after pulverizing, wherein Heating temperature is 200 ℃, and be 30～45 minutes heat-up time, cools off post-treatment again and become particulate state;

3) heating makes its liquefaction to the waste or used plastics particle high-temperature, is 250～350 ℃ to waste or used plastics particle Heating temperature wherein, and satisfy heat-up time: the waste or used plastics particle is liquefied fully; Cooling obtains the modifying waste plastic agent again;

4) the heating matrix pitch makes it softening, then the modifying waste plastic agent that obtains in the step 3) is heated mixing in 8～10% ratio with matrix pitch, and the Heating temperature of modifying waste plastic agent and matrix pitch Hybrid Heating is 170～180 ℃;

5) mixture that obtains in the step 4) is melted bloated, melting the time of expanding is 15～30 minutes; Again mixture was carried out high speed shear 30 minutes, modified asphalt manufacturing is finished.