CN102558886B - High-concentration crumb rubber modified asphalt and preparation method thereof - Google Patents
High-concentration crumb rubber modified asphalt and preparation method thereof Download PDFInfo
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- CN102558886B CN102558886B CN201210030462.9A CN201210030462A CN102558886B CN 102558886 B CN102558886 B CN 102558886B CN 201210030462 A CN201210030462 A CN 201210030462A CN 102558886 B CN102558886 B CN 102558886B
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- rubber powder
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- 239000010426 asphalt Substances 0.000 title claims abstract description 33
- 229920002209 Crumb rubber Polymers 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 87
- 229920001971 elastomer Polymers 0.000 claims description 60
- 239000012754 barrier agent Substances 0.000 claims description 27
- 238000011049 filling Methods 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000005728 strengthening Methods 0.000 claims description 15
- 238000009775 high-speed stirring Methods 0.000 claims description 13
- 230000008961 swelling Effects 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 4
- 239000005642 Oleic acid Substances 0.000 claims description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 4
- 235000020661 alpha-linolenic acid Nutrition 0.000 claims description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 4
- 229960004488 linolenic acid Drugs 0.000 claims description 4
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 claims description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000000197 pyrolysis Methods 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 150000002632 lipids Chemical class 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000010913 used oil Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 125000005481 linolenic acid group Chemical group 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000000945 filler Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000002203 pretreatment Methods 0.000 abstract 1
- 239000012744 reinforcing agent Substances 0.000 abstract 1
- 239000011295 pitch Substances 0.000 description 29
- 206010042674 Swelling Diseases 0.000 description 9
- 239000002699 waste material Substances 0.000 description 8
- 238000011068 loading method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000004636 vulcanized rubber Substances 0.000 description 4
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000192 social effect Effects 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention relates to high-concentration crumb rubber modified asphalt and a preparation method thereof, and belongs to the field of modified asphalt for road construction. Aiming at the problems that the dosage of crumb rubber is not high enough in the traditional crumb rubber modified asphalt technology, and secondary pollution and high energy consumption exist in the wet method modification, the invention adopts a crumb rubber pretreatment method to prepare modified crumb rubber, and then the modified crumb rubber and a reinforcing agent are mixed with asphalt to prepare the high-concentration crumb rubber modified asphalt with a high-speed shearing method, and the filler content of the modified crumb rubber can reach more than 50 parts. The crumb rubber modified asphalt is simple in preparation technology, high in the dosage of the crumb rubber, superior in performance and high in cost performance, and has significant social meaning and environmental protection value.
Description
Technical field
The present invention relates to a kind of high-concentration crumb rubber modified asphalt and preparation method thereof, with it for road construction.
Background technology
Automotive industry and transportation have become the mainstay industry of China gradually, have therefore also produced a large amount of junked tires.The complicated tridimensional network of the elastomeric material inside in tire, and a large amount of fillers and softening wet goods material are added, these have all greatly limited it and have recycled, and are very rationally one of effective approach that people generally acknowledge and produce rubber powder with damaged tire.China's motorway laying speed is sure to occupy the first in the world, and total kilometrage also leaps to the second in the world, and the fast development of highway industry has promoted the development of ground surface material greatly, and people are also more and more higher to the requirement of bituminous concrete performance.Waste Crumb rubber modified asphalt technology, because it is in environmental protection with to the double dominant in the raising of pitch high temperature performance, progressively becomes a kind of desirable ground surface material.
Waste rubber powder modified asphalt has environmental protection, economic dispatch advantage is apparent, but the waste Crumb rubber addition of current waste rubber powder modified asphalt technology is 15%～25% left and right, and the course of processing cycle is longer, generally need several hours, its advantage has been subject to certain restriction.And waste Crumb rubber is to have formed 3 D stereo network structure by chemical bonding, swelling very limited to pitch between processing period, not considering to increase after consumption as mechanical raising rubber powder consumption, is unscientific on the impact of rubber powder modified asphalt and asphalt generation.Therefore, develop a kind of loading level large, can enhance productivity, and the rubber powder modified asphalt of pavement performance excellence has great social effect and industry is worth.
Summary of the invention
For addressing the above problem, the invention provides a kind of high-concentration crumb rubber modified asphalt and preparation method thereof.
A kind of high-concentration crumb rubber modified asphalt, it is characterized in that its composition comprises modified glue powder, strengthening agent and matrix pitch, described modified glue powder is by filling barrier agent and rubber powder forms, and described filling barrier agent is one or more in linolenic acid, lipid acid, naphthenic oil, white mineral oil, silicone oil, oleic acid, used oil, waste-plastic pyrolysis oil, one-tenth pint matter pitch.
The weight ratio of described modified glue powder, strengthening agent and matrix pitch is 45～70: 0.5～5: 100, and the mass ratio of filling barrier agent and rubber powder in described modified glue powder is 100: 50～110.
The mass ratio of described filling barrier agent and rubber powder is 100: 70～100.
It consists of grafting ultrahigh molecular weight polyethylene(UHMWPE) described strengthening agent.
Described rubber powder is the rubber powder that damaged tire makes, and particle diameter is 20～120 orders.
The preparation method of above-mentioned modified glue powder, is characterized in that comprising the following steps:
First described filling barrier agent part being in harmonious proportion is sprayed on rubber powder, carries out premix by high-speed stirring, air-cooled after stirring, and places and within 40-60 hour, obtains pre-swelling rubber powder; Then use pre-swelling rubber powder that two roller mills obtain premix to fill barrier agent with residue and shear blend, fully swelling rear use high-speed stirring is stirred to dispersion, and under room temperature, places 40-60h and reach full growth, and makes described modified glue powder.
Described filling barrier agent is heated to 50 ℃～60 ℃ while sprinkling, and the whipping temp of filling barrier agent and shoddy is 50 ℃～70 ℃, and air-cooled rear temperature is 30 ℃～40 ℃, air-cooled rear placement 48h, and after disperseing, room temperature is placed 48 hours.
The speed of described high-speed stirring is 800～1500r/min, and the time is 5～30min.
The parameter of described pair of roller mill is set to, and roller spacing is 0.2mm, and temperature is 40 ℃, and rotating ratio is 1.15.
The stirring velocity of described mixing rear rubber powder is 600r/min, time 3～10min.
The invention provides a kind of high-concentration crumb rubber modified asphalt, its composition comprises modified glue powder, strengthening agent and pitch, wherein modified glue powder consist of 100 parts of shoddies, fill 51～110 parts of barrier agents, take 70～100 parts for preferred.Described shoddy is the rubber powder that damaged tire makes, and particle diameter is 20～120 orders, take 40-80 order as preferred.Technical indicator meets " vulcanized rubber powder GB/T19208-2008 "; Strengthening agent is grafting ultrahigh molecular weight polyethylene(UHMWPE); Filling barrier agent is one or more in linolenic acid, lipid acid, naphthenic oil, white mineral oil, silicone oil, oleic acid, used oil, waste-plastic pyrolysis oil, one-tenth pint matter pitch.
By by a certain proportion of pitch light component and light component analogue according to preset proportion, take the technique of 2 footworks, be evenly coated on vulcanized rubber powder, and allow it to rubber powder internal divergence, reach the abundant preswollen object of rubber powder.Meanwhile, by the filling of light component and light component analogue, can well keep the elasticity of rubber powder, the density that reduces rubber powder softening vulcanized rubber powder.The modified glue powder making like this can improve the consistency between shoddy and pitch, and what make that rubber powder can fast and stable is scattered among pitch, improves the stability in storage of rubber powder pitch.The pre-swelling meeting of rubber powder significantly reduces its absorption to related component in pitch, thereby guarantees that modifying asphalt viscosity is moderate, and improves the low-temperature performance of rubber powder modified asphalt.
By the interpolation of strengthening agent, can further improve the high-temperature behavior of modifying asphalt, make the high-concentration crumb rubber modified asphalt of excellent performance.
Compared with prior art, innovative point of the present invention is as follows:
(1) preferred pitch light component and light component analogue, be not all foundation according to the ratio in pitch swelling process, two kinds of light component being absorbed, and fills the allotment of barrier agent, and rubber powder is carried out to pre-swelling treatment.
(2) by filling swelling in advance to rubber powder of barrier agent, reduced the absorption to light component in pitch after rubber powder adds in pitch, thereby reduced the viscosity of rubber powder pitch, thereby can significantly improve the interpolation usage quantity of rubber powder in pitch.Actual rubber powder volume reaches more than 50 parts.
(3) by filling swelling in advance to rubber powder of barrier agent, reduce the density of rubber powder, softened vulcanized rubber powder hardness, improved the consistency of rubber powder and pitch, significantly improved the education resistance energy of rubber powder modified asphalt.
(4) modified glue powder of preparing by spraying high-speed stirring technique, has kept the powder morphology of rubber powder,, has kept elasticity and the mechanical property of rubber powder, and has saved energy consumption and cost by compared with the method granulations such as twin screw with existing masterbatch technology.
(5) by selecting grafting ultrahigh molecular weight polyethylene(UHMWPE) as strengthening agent, utilize the close principle of polarity to solve poly segregation problem, adopt ultrahigh molecular weight polyethylene(UHMWPE) can significantly improve the high-temperature behavior of pitch simultaneously.
It is large that the present invention has developed a kind of rubber powder loading level, can enhance productivity, and the rubber powder modified asphalt of pavement performance excellence, there is great social effect and industry and be worth.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Penetration degree is pressed GB/T 0604-2000 test; 5 ℃ of ductilities are pressed GB/T 0605-2000 test; Softening temperature is pressed GB/T 0606-1993 test; Bu Shi rotation viscosity is pressed GB/T 0625-2000 test; Recovery of elasticity is pressed GB/T 0662-2000 test.
Embodiment 1
Press mass fraction, by 100 parts of shoddies in reactor, first with 400r/min stirring at low speed 3min, then with 600r/min high-speed stirring 1min, and be warming up to 45 ℃, be preheated to the filling barrier agent (silicone oil: linolenic acid=2: 1) be injected in above-mentioned shoddy of 50 ℃ by 45 parts, at the temperature of 55 ℃, with 1200r/min high-speed stirring 5min, air-cooled 2min, when temperature drops to 40 ℃, storage 48h, then use two roller mills that premix rubber powder and 10 parts of filling barrier agents are sheared to blend processing, then break up, after normal temperature storage 48h, obtain high-performance high filler loading capacity pitch modified glue powder.45 parts of rubber powders and 1 portion of strengthening agent and 100 parts of matrix pitches are stirred to 15min at 170 ℃, and speed is 800r/min, and high speed shear 45min under 10000r/min, obtains waste rubber powder modified asphalt agglutinate.
Embodiment 2
Press mass fraction, by 100 parts of shoddies in reactor, first with 500r/min stirring at low speed 1min, with 800r/min high-speed stirring 3min, and be warming up to 45 ℃, be preheated to the filling barrier agent (naphthenic oil: industrial oleic acid=3: 1) be injected in above-mentioned shoddy of 50 ℃ by 55 parts, with 800r/min high-speed stirring 2min, air-cooled 3min, temperature is stored 48h after being reduced to 40 ℃, then use two roller mills that premix rubber powder and 15 parts of filling barrier agents are sheared to blend processing, then break up, normal temperature storage 48h, make high-performance high filler loading capacity pitch modified glue powder.60 parts of rubber powders and 1 portion of strengthening agent and 100 parts of matrix pitches are stirred to 15min at 170 ℃, and speed is 800r/min, and under 10000r/min, high speed shear 45min obtains waste rubber powder modified asphalt agglutinate.
Embodiment 3
Press mass fraction, by 100 parts of shoddies in reactor, first with 400r/min stirring at low speed 3min, then use 800r/min high-speed stirring 3min instead, and be warming up to 45 ℃, be preheated to the filling barrier agent (waste-plastic pyrolysis oil: de-matter pitch=4: 1) of 60 ℃ by 70 parts, with 800r/min high-speed stirring 2min, air-cooled 5min, storage 48h, then uses two roller mills that premix rubber powder and the blend of 20 parts of filling barrier agents are carried out to shearing treatment, then breaks up, storage 48h, makes high-performance high filler loading capacity pitch modified glue powder.60 parts of rubber powders and 1 portion of strengthening agent and 100 parts of matrix pitches are stirred to 30min at 180 ℃, and speed is 1200r/min, then shears 45min, and speed is 12000r/min, obtains waste rubber powder modified asphalt agglutinate.
Embodiment 4
Get 3 parts of 60 parts of rubber powders described in embodiment 3, strengthening agent and stir 30min with 100 parts of matrix pitches at 180 ℃, speed is 1200r/min, uses high-shear machine instead and shears 45min with 12000r/min, obtains modifying asphalt agglutinate.
Embodiment 5
Get 5 parts of 60 parts of rubber powders described in embodiment 3, strengthening agent and stir 30min with 100 parts of matrix pitches at 180 ℃, speed is 1200r/min, uses high-shear machine instead and shears 45min with 12000r/min, obtains modifying asphalt agglutinate.
Table 1 is the performance index of rubber powder asphalt sample described in embodiment 1～5
From data, can find out, rubber powder addition has obtained the product of excellent performance when increasing.
Claims (7)
1. a high-concentration crumb rubber modified asphalt, it is characterized in that its composition comprises modified glue powder, strengthening agent and matrix pitch, described modified glue powder is by filling barrier agent and rubber powder forms, described filling barrier agent is linolenic acid, lipid acid, naphthenic oil, white mineral oil, silicone oil, oleic acid, used oil, waste-plastic pyrolysis oil, become one or more in pint matter pitch, described modified glue powder, the weight ratio of strengthening agent and matrix pitch is 45～70:0.5～5:100, the mass ratio of filling barrier agent and rubber powder in described modified glue powder is 100:50～110, described rubber powder is the rubber powder that damaged tire makes, particle diameter is 20～120 orders.
2. a kind of high-concentration crumb rubber modified asphalt according to claim 1, the mass ratio that it is characterized in that described filling barrier agent and rubber powder is 100:70～100.
3. a kind of high-concentration crumb rubber modified asphalt according to claim 1, it consists of grafting ultrahigh molecular weight polyethylene(UHMWPE) to it is characterized in that described strengthening agent.
4. according to the preparation method of the arbitrary described modified glue powder of claim 1-3, it is characterized in that comprising the following steps:
First described filling barrier agent part being in harmonious proportion is sprayed on rubber powder, carries out premix by high-speed stirring, air-cooled after stirring, and places and within 40-60 hour, obtains pre-swelling rubber powder; Then use pre-swelling rubber powder that two roller mills obtain premix to fill barrier agent with residue and shear blend, fully swelling rear use high-speed stirring is stirred to dispersion, and under room temperature, places 40-60h and reach full growth, and makes described modified glue powder; Described filling barrier agent is heated to 50 ℃～60 ℃ while sprinkling, and the whipping temp of filling barrier agent and shoddy is 50 ℃～70 ℃, and air-cooled rear temperature is 30 ℃～40 ℃, air-cooled rear placement 48h, and after disperseing, room temperature is placed 48 hours.
5. the preparation method of modified glue powder according to claim 4, the speed that it is characterized in that described high-speed stirring is 800～1500r/min, the time is 5～30min.
6. the preparation method of modified glue powder according to claim 4, is characterized in that the parameter of described pair of roller mill is set to, and roller spacing is 0.2mm, and temperature is 40 ℃, and rotating ratio is 1.15.
7. the preparation method of modified glue powder according to claim 4, the stirring velocity that it is characterized in that described mixing rear rubber powder is 600r/min, time 3～10min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030462.9A CN102558886B (en) | 2012-02-10 | 2012-02-10 | High-concentration crumb rubber modified asphalt and preparation method thereof |
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| CN201210030462.9A CN102558886B (en) | 2012-02-10 | 2012-02-10 | High-concentration crumb rubber modified asphalt and preparation method thereof |
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| CN102558886A CN102558886A (en) | 2012-07-11 |
| CN102558886B true CN102558886B (en) | 2014-06-04 |
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| CN105001656B (en) * | 2015-08-21 | 2018-07-24 | 西安永和科技有限公司 | Room temperature asphalt modifier, normal temperature modified pitch and warm mix cold laid asphaltic concrete |
| CN105348828A (en) * | 2015-12-01 | 2016-02-24 | 广东省建筑科学研究院集团股份有限公司 | Environment-friendly rubber asphalt and preparation method thereof |
| CN105801006B (en) * | 2016-03-07 | 2017-12-05 | 郑卫忠 | Asphalt for heavy traffic road and preparation method thereof |
| CN107353655B (en) * | 2017-07-26 | 2020-05-08 | 河北省交通规划设计院 | Large-mixing-amount stable rubber powder modified asphalt and preparation method thereof |
| CN107501967B (en) * | 2017-08-25 | 2020-09-11 | 北京中交路通科技发展有限公司 | Asphalt modifier, preparation method and asphalt mixture containing asphalt modifier |
| CN110358164A (en) * | 2019-07-19 | 2019-10-22 | 长安大学 | A kind of application of waste used oil in terms of modified rubber |
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| CN101979440A (en) * | 2010-10-18 | 2011-02-23 | 无锡市同义路面新材料有限公司 | Asphalt modifier and preparation method thereof |
| CN102977438A (en) * | 2012-12-06 | 2013-03-20 | 中橡集团曙光橡胶工业研究设计院 | Aircraft tire flap rubber |
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