CN104830075A - Preparation method and use of low noise asphalt pavement cementing material - Google Patents
Preparation method and use of low noise asphalt pavement cementing material Download PDFInfo
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- CN104830075A CN104830075A CN201510179740.0A CN201510179740A CN104830075A CN 104830075 A CN104830075 A CN 104830075A CN 201510179740 A CN201510179740 A CN 201510179740A CN 104830075 A CN104830075 A CN 104830075A
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- low noise
- bituminous pavement
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- agglutinate
- butyl rubber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention relates to a preparation method and a use of a low noise asphalt pavement cementing material. The method mainly comprises the following steps: carrying out mixing processing on waste butyl rubber through an internal mixer mixing device in the presence of a cracking assistant at 230-300DEG C to degrade the waste butyl rubber, adding 20-50wt% of the degraded waste butyl rubber to heavy duty asphalt, and stirring to obtain the high-damping modified asphalt cementing material. The cementing material can be applied to a dense graded and gap graded asphalt mixture in order to reduce the noise of asphalt pavement. The noise reduction asphalt pavement cementing material has the characteristics of obvious pavement noise reduction performance, good weatherability, easy construction, environmental protection, safety, excellent high and low temperature performances, and good economic and environmentally-friendly benefits.
Description
Technical field
The present invention relates to modifying road asphalt field, especially relate to a kind of preparation method of low noise bituminous pavement agglutinate.
Background technology
Pitch, as a kind of agglutinate, has waterproof, insulation, the advantage such as corrosion-resistant, and has good cohesive action with stone ore material, be extensively used as pavement construction material for a long time.In recent years, along with the increase of the volume of traffic and traffic load, and ur-banization speed is accelerated, and many roads pass through Residential areas, and noise pollution reduces people's quality of life greatly, propose harsher requirement to making asphalt pavement material.
Low noise pavement is the study hotspot in road field always.Because of the characteristic that the braking absorption of bituminous material shakes, the remarkable reduction of the noise ratio cement pavement on plain asphalt road surface, for reducing pavement noise, most road is all designed to bituminous pavement.For reducing the noise of bituminous pavement further, the methods such as the structure on usual employing design improvement road surface and raising Asphalt Pavement Surface Evenness reduce the noise on road surface, such as adopt mushy drainage pavement noise to reduce 2-4dB, but the method is difficult to reduce to a certain extent afterwards again at reduction bituminous pavement noise.In addition, also the method class by changing consolidating material reduces noise, the rubber asphalt such as developed in recent years, the vibrations on automobile and road surface are weakened by the modulus reducing bituminous pavement, thus reduce the noise of bituminous pavement, but the most multipotency of the noise on this road surface reduces 2-4dB, be therefore badly in need of finding a kind of can the novel asphalt agglutinate of low noise of absorbing vibration.
The damping characteristic of isoprene-isobutylene rubber is high, by a large amount of for reducing various vibrations, weaken noise, but because of its price higher, mooney viscosity is high-leveled and difficult with processing dispersion in pitch, is used for bituminous pavement so difficult.China's waste butadiene rubber increases year by year, the solid waste that annual generation is a large amount of.Compare natural rubber, styrene-butadiene rubber(SBR) is main scrap tire rubber, the damping noise-reducing performance of isoprene-isobutylene rubber is more excellent, is necessary that the waste butyl rubber studying low noise is for bituminous pavement modification.At present, because of the resistance to air loss of isoprene-isobutylene rubber excellence, by a large amount of for tube, the waste gas butyl inner tube that gives up is crosslinking structure, and be difficult to be distributed in pitch, in the modifying asphalt of preparation, useless butyl is elastic filler, can not give full play to the advantage that damping sound-absorbing is good.
For improving the dispersiveness of rubber powder in pitch, CN102601975A mono-kind adopts the method for screw extrusion press continuous production liquid regeneration glue, this invention adopts the method for screw extrusion press continuous production liquid regeneration glue, the method utilizes screw extrusion press, adopt the method for physical chemistry interlock, by pretreated shoddy, under the comprehensive action of extruding built-in temperature, pressure, shearing, sweetening agent, the three-dimensional crosslinked network of broken waste rubber, but the production efficiency of this method is low, and the pollution treatment method defectiveness produced in production process.In addition, though this method proposes prepare the high rubber blending of desulphurization, disaggregation degree in pitch, but to the desulfurization of isoprene-isobutylene rubber degraded and for low noise bituminous pavement agglutinate and not mentioned.
Banbury mixer desulfurization is for overcoming the desulfurization regeneration equipment that conventional high-tension dynamic devulcanizer high pressure is dangerous, Screw Extrusion efficiency is low and grow up, and has automatic control and the feature such as output is large.Isoprene-isobutylene rubber just can be processed at 230 DEG C and prepare reclaimed rubber, replace rubber for the manufacture of rubber item to be used as part.As by its raised temperature, add prodegradant, the isoprene-isobutylene rubber of low mooney viscosity is prepared in degraded, then the research of making low noise bituminous pavement agglutinate have not been reported.
CN103194072A, CN103980723A and CN102181163A etc. use the way of activated rubber powder or the rubber powder long-time composite modified asphalt sheared in pitch, and then prepare the composite modified asphalt of steady heat storage.But this processes process is longer, and cost is higher, pollutes large, be not suitable for the bituminous cements preparing low noise.
Summary of the invention
The present invention is in order to overcome above-mentioned deficiency of the prior art, provide a kind of technological process succinctly easy, bituminous cements that can add a large amount of butyl waste rubber, significantly improve traditional asphalt damping sound absorbing power, thus by preparing the approach of high performance low noise agglutinate, greatly reduce the noise of bituminous pavement.
People is for achieving the above object in invention, in conjunction with problem to be solved by this invention, through studying for a long period of time, find that butyl waste rubber is higher than 230 DEG C, particularly about 250 DEG C, under the effect of superoxide, the violent fracture of easy generation molecular chain, now be easy to get the elastomeric material of low mooney viscosity, this rubber is different from a large amount of butyl reclaimed rubber used on market, its sol content high (being greater than 50%), but just because of this point, it is made to add pitch in a large number, play the damping noise-reducing effect of isoprene-isobutylene rubber, the modified asphalt material making preparation novel becomes possibility.Because its viscosity is low and have cohesiveness, therefore there is the feature of class bituminous material.Again because its viscosity is low, this material is not only easily distributed in pitch, and addition content in pitch is large, thus solves traditional isoprene-isobutylene rubber powder difficult dispersion and settlement issues in pitch.Therefore contriver determines degraded waste butyl rubber and asphalt performance feature to combine, and coordinates other rational processing method, prepares the Cost of New Type Asphalt Pavement agglutinate of low noise, reach the technique effect that the present invention wants to reach simultaneously.
The technical solution used in the present invention is:
A preparation method for low noise bituminous pavement agglutinate, is characterized in that, comprise following steps:
(1) waste butyl rubber and cracking auxiliary agent are passed through Banbury mixer decomposition apparatus, at 230-300 DEG C of temperature, process 3-10min, make waste butyl rubber Degradation and Transformation be thick low Mooney rubber;
(2) by weight ratio be the heavy traffic paving asphalt/degraded waste butyl rubber of 80/20-50/50 when temperature is 150-180 DEG C, mix, stir grow, finally obtain waste butyl rubber modifying asphalt, i.e. low noise bituminous pavement agglutinate.This modifying asphalt reduces pavement noise excellent property, 4-6dB lower than plain asphalt pavement noise.
In described step (1), waste butyl rubber cracking being transformed the detailed process obtaining cracking low viscosity rubber is: cracking auxiliary agent waste butyl rubber grain and weight ratio being accounted for the 0.3-2% of waste butyl rubber grain weight amount processes 3-10min at 230-300 DEG C of temperature, makes the cracking of butyl waste rubber be converted into thick low mooney viscosity elastomeric material; As preferably, described cracking auxiliary agent is organo-peroxide, and described superoxide comprises dibenzoyl peroxide, dicumyl peroxide and two 2,5.
As preferably, in step (2), between the stirring growth period, control mixing speed is 300-1000r/min, stirring reaction 30-150min.
As preferably, the waste rubber in described step (1) is the micelle ground after junked tire fragmentation, and order number is 5-10 order.
As preferably, described step (2) first cracking is transformed rubber to add in heating asphalt tank, mixes growth, prepare waste butyl rubber modifying asphalt, be i.e. low noise bituminous pavement agglutinate with pitch at 150-180 DEG C.
As preferably, the heavy traffic paving asphalt described in described step (2) meets the Ministry of Communications JTGF40-2004 requirement.
As preferably, described waste butadiene rubber is the waste and old truck inner tube of a tyre, and wherein isoprene-isobutylene rubber content is greater than 40%.
As preferably, the degraded isoprene-isobutylene rubber sol content obtained in described step (1) is greater than 50%, and mooney viscosity is lower than 40.
Present invention also offers a kind of low noise bituminous pavement agglutinate obtained by the preparation method of above-mentioned waste butyl rubber degradation modification bituminous cements, for the production of preparing low noise bituminous pavement.
The method that the present invention adopts hot Banbury to degrade, be different from traditional rubber thermal cracking temperature up to more than 400 DEG C, obtain pyrolysis gas, pyrolysis oil and carbon black, also conventional regeneration glue reclaiming process is different from, this waste butadiene rubber is about 250 DEG C degradeds, the main chain of crosslinked isoprene-isobutylene rubber and crosslinking sidechain are easy to that chemical bond occurs and destroy, more accelerate under the effect of superoxide and deepen this destruction, the crosslinking structure of rubber is disintegrated, and waste rubber is degraded to the rubber that low mooney viscosity can flow.Because cross-link bond ruptures in a large number, molecular weight rubber diminishes, now sol content is sharply raised to, be greater than 50%, there is high workability and adhesive property, be more conducive to the damping playing isoprene-isobutylene rubber, be also conducive to strengthening the addition of rubber in pitch, play the damping noise-reducing effect of isoprene-isobutylene rubber, in pitch, easily reach uniform and stable dispersion simultaneously.
Compared with prior art, the butyl waste rubber cracking modifying asphalt agglutinate that the present invention obtains, 135 DEG C of viscosity perform according to GB/T0625-2011 standard, and result shows that its viscosity is less than 4Pa.s, has good construction workability.The test of the penetration degree of modifying asphalt, ductility, softening temperature performs according to GB/T0604-2011, GB/T0605-2011, GB/T0606-2011 standard respectively, result shows that the high temperature performance of modifying asphalt is excellent, physical properties meets the bitumen for road use performance index that China specifies, is applicable to producing employing on a large scale.Show by comparing the damping factor change added before and after degraded isoprene-isobutylene rubber modifying asphalt, this agglutinate has very excellent damping capacity, achieves significant technique effect:
1. the present invention is innovatively by the method for high temperature degradation, makes waste and old butyl waste rubber become the low mooney viscosity rubber of high flowing, significantly improves its dispersiveness in pitch.Technique is simple, and successful, environmental protection is easy to control.
2. combined by rational technique with pitch after high temperature degradation by isoprene-isobutylene rubber dexterously, the damping noise-reducing performance that isoprene-isobutylene rubber is excellent, substantially increases the anti-acoustic capability of bituminous pavement again, makes the noise of bituminous pavement reduce 4-6dB.
3., because waste butadiene rubber disperses fine in pitch, also have a large amount of carbon black release, therefore it is conducive to the ageing-resistant of this rubber modified asphalt.Solve a puzzlement difficult problem for a long time in the industry, expand the weather resistance of modifying asphalt.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
Step 1: in massfraction, matrix pitch is SK70 pitch, and test the traditional performance of pitch, damping factor and bituminous pavement noise, be numbered 1, performance is in table 1.
Embodiment 2
Step 1: by the waste and old butyl inner tube micelle of 8 object, join in Banbury mixer, at 250 DEG C, after 6min, waste butyl rubber is become class bituminous material, in mass fraction, by the waste rubber Pintsch process class bituminous material of 30 parts, the SK heavy traffic paving asphalt of 70 parts, waste rubber modification is mixed with in asphalt tank, mixing temperature is 160 DEG C, and rotating speed is 500r/min, and the time is 70min.
Obtained isoprene-isobutylene rubber modifying asphalt is numbered 2, and performance is in table 1.
Embodiment 3
By the waste and old butyl inner tube micelle of 8 object, add the dicumyl peroxide of 0.5%, join in the Banbury mixer of 180 DEG C, be warmed up to 250 DEG C under shearing action at, after 6min, waste butyl rubber is become the elastomeric material of low mooney viscosity, in mass fraction, by the waste rubber Pintsch process class bituminous material of 30 parts, the SK heavy traffic paving asphalt of 70 parts, in asphalt tank, be mixed with waste rubber modification, mixing temperature is 160 DEG C, rotating speed is 500r/min, and the time is 70min.
Obtained isoprene-isobutylene rubber modifying asphalt is numbered 3, and performance is in table 1.
Embodiment 4
By the waste and old butyl inner tube micelle of 8 object, join in Banbury mixer, at 300 DEG C, after 6min, waste butyl rubber is become class bituminous material, in mass fraction, by the waste rubber Pintsch process class bituminous material of 30 parts, the SK heavy traffic paving asphalt of 70 parts, waste rubber modification is mixed with in asphalt tank, mixing temperature is 160 DEG C, and rotating speed is 500r/min, and the time is 70min.
Obtained isoprene-isobutylene rubber modifying asphalt is numbered 4, and performance is in table 1.
The performance of modified bitumen that table 1 embodiment 1-4 obtains
Embodiment 1-4 contrast is visible, and the dissipation factor of waste butyl rubber degraded post-modification pitch is significantly improved, and illustrates that modifying asphalt has good anti-acoustic capability; 5 DEG C of ductilities increase greatly, show good low-temperature performance; 135 DEG C of viscosity are less than 3Pas, also have good construction workability.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (8)
1. a preparation method for low noise bituminous pavement agglutinate, is characterized in that, comprises following steps:
(1) waste butyl rubber and cracking auxiliary agent are passed through Banbury mixer decomposition apparatus, at 230-300 DEG C of temperature, process 3-10min, make waste butyl rubber Degradation and Transformation be thick low Mooney rubber;
(2) by weight ratio be the heavy traffic paving asphalt/degraded waste butyl rubber of 80/20-50/50 when temperature is 150-180 DEG C, mix, stir grow, finally obtain waste butyl rubber modifying asphalt, i.e. low noise bituminous pavement agglutinate.
2. the preparation method of low noise bituminous pavement agglutinate according to claim 1, is characterized in that, the waste butyl rubber in described step (1) is the micelle after junked tire fragmentation, and the order number of micelle is 5-10 order.
3. the preparation method of low noise bituminous pavement agglutinate according to claim 1, is characterized in that, in step (1), described in the cracking auxiliary agent that adds account for the 0.3-2% of waste butyl rubber grain total mass.
4. the preparation method of low noise bituminous pavement agglutinate according to claim 3, is characterized in that, described cracking auxiliary agent is superoxide, and described superoxide comprises dibenzoyl peroxide, dicumyl peroxide and two 2,5.
5. the preparation method of low noise bituminous pavement agglutinate according to claim 1, is characterized in that, the degraded waste butyl rubber sol content obtained in described step (1) is greater than 50%, and mooney viscosity is lower than 40.
6. the preparation method of low noise bituminous pavement agglutinate according to claim 1, is characterized in that, in step (2), between the stirring growth period, control mixing speed is 300-1000r/min, and the stirring reaction time is 30-150min.
7. the preparation method of the low noise bituminous pavement agglutinate according to claim 1-6 any one produces obtained low noise bituminous pavement agglutinate.
8. an application for low noise bituminous pavement agglutinate according to claim 7, is characterized in that, for the preparation of low noise bituminous pavement.
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| CN201510179740.0A CN104830075B (en) | 2015-04-15 | 2015-04-15 | Preparation method and use of low noise asphalt pavement cementing material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700560A (en) * | 2016-12-14 | 2017-05-24 | 宜兴市乐创文化发展有限公司 | Rubber wheel disc |
| CN109735127A (en) * | 2019-02-20 | 2019-05-10 | 翟治国 | A kind of preparation method of high frequency noise reduction pitch |
| CN113174801A (en) * | 2021-04-30 | 2021-07-27 | 上海交通大学 | Durable silent downward-penetrating type pavement structure and construction method thereof |
| CN114316357A (en) * | 2021-12-29 | 2022-04-12 | 江苏宝利国际投资股份有限公司 | Preparation method of reactive rubber for modified asphalt |
| CN114752108A (en) * | 2022-05-13 | 2022-07-15 | 长沙理工大学 | Method for degrading waste tire rubber into asphalt-like material |
| CN115160806A (en) * | 2022-07-18 | 2022-10-11 | 甘肃公航旅低碳科技有限公司 | Preparation method and application of low-carbon asphalt based on recycled resources |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700560A (en) * | 2016-12-14 | 2017-05-24 | 宜兴市乐创文化发展有限公司 | Rubber wheel disc |
| CN109735127A (en) * | 2019-02-20 | 2019-05-10 | 翟治国 | A kind of preparation method of high frequency noise reduction pitch |
| CN113174801A (en) * | 2021-04-30 | 2021-07-27 | 上海交通大学 | Durable silent downward-penetrating type pavement structure and construction method thereof |
| CN113174801B (en) * | 2021-04-30 | 2023-12-15 | 上海交通大学 | Durable mute downward-penetrating type pavement structure and construction method thereof |
| CN114316357A (en) * | 2021-12-29 | 2022-04-12 | 江苏宝利国际投资股份有限公司 | Preparation method of reactive rubber for modified asphalt |
| CN114752108A (en) * | 2022-05-13 | 2022-07-15 | 长沙理工大学 | Method for degrading waste tire rubber into asphalt-like material |
| CN114752108B (en) * | 2022-05-13 | 2023-07-25 | 长沙理工大学 | Method for degrading waste tire rubber into asphalt |
| CN115160806A (en) * | 2022-07-18 | 2022-10-11 | 甘肃公航旅低碳科技有限公司 | Preparation method and application of low-carbon asphalt based on recycled resources |
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| CN104830075B (en) | 2017-05-10 |
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