CN104479376B - Rubber-plastic composite modified asphalt with stable thermal storage and preparation method thereof - Google Patents
Rubber-plastic composite modified asphalt with stable thermal storage and preparation method thereof Download PDFInfo
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- CN104479376B CN104479376B CN201410742568.0A CN201410742568A CN104479376B CN 104479376 B CN104479376 B CN 104479376B CN 201410742568 A CN201410742568 A CN 201410742568A CN 104479376 B CN104479376 B CN 104479376B
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Abstract
The invention discloses rubber-plastic composite modified asphalt with stable thermal storage. The rubber-plastic composite modified asphalt is prepared from matrix asphalt, waste tire rubber powder, polyethylene and a 264 antioxidant, wherein the content of the waste tire rubber powder is 10-35% of the weight of the matrix asphalt, the content of polyethylene is 3-10% of the weight of the matrix asphalt, and the content of the 264 antioxidant is 1.0-5.0% of the weight of the waste tire rubber powder. A preparation method of the rubber-plastic composite modified asphalt comprises the following steps: (1) heating the matrix asphalt into a hot melt state, slowly adding a well weighed mixture of the waste tire rubber powder, polyethylene and 264 antioxidant, and stirring to mix uniformly; and (2) heating the modified asphalt mixture of the step (1) to 170-210 DEG C, and performing high-velocity shearing for 30-120 minutes. The modified asphalt prepared by the method disclosed by the invention improves the high-temperature rut resistance, low-temperature crack resistance and thermal storage stability of asphalt, and is not easy to segregate, so that the cost of the modified asphalt is reduced, and the process is simple and is beneficial for popularization and application of the modified asphalt.
Description
Technical field
The present invention relates to the preparation method of modified pitch, and in particular to one kind has preferable high temperature performance and heat-storage steady
Fixed rubber and plastic compound modified asphalt and preparation method thereof.
Background technology
With increasing rapidly for traffic volume of highway, the phenomenon such as vehicle maximization, heavy duty, overload, canalized traffic becomes increasingly conspicuous,
Destruction is occurred as soon as after causing asphalt concrete pavement current very short time, the normal operation and service life of road is affected.In addition,
The Colophonium sensitivity stronger to temperature causes asphalt concrete pavement high temperature rut, passage, winter occur in summer low temperature occur
Problems of crack.In consideration of it, the temperature sensitivity for improving Colophonium by adding polymer modifiers becomes raising bituminous paving road
With the effective way of performance.
Being presently used for the polymer modifiers of modified pitch mainly has：Thermoplastic elastomer (TPE) class, such as：Styrene-fourth two
Alkene-styrene (SBS), styrene-isoprene-phenylethene (SIS) etc.；Rubber-like, such as：Natural rubber (NR), butadiene-styrene rubber
(SBR), butadiene rubber (BR), isoprene rubber (IR) etc.；Resinae, such as：Polyethylene (PE), Atactic Polypropelene (APP) etc..But
It is that, though above-mentioned most polymer modifiers can be obviously improved the pavement performance of asphalt material, its higher price undoubtedly can
The cost of modified pitch is significantly increased, so as to restrict the popularization and application of modified pitch.
When using waste rubber tyre powder or PE as Colophonium modifying agent when, because waste rubber tyre powder, PE are changing with matrix pitch
Learn and have very big difference on structure, density, viscosity, molecular weight etc., it is thermodynamically extremely incompatible, and then cause waste rubber tyre powder or
All there is steady heat storage sex chromosome mosaicism in PE modified Colophonium.In addition, waste rubber tyre powder, PE granules will be with the sides on reduction system surface
Formula reduces surface energy, and at high temperature mutually collision is assembled to show as granule, after reaching certain particle size, due to polymer and drip
Blue or green density contrast, granule occurs to float or sinks, and its result is that modified pitch is isolated.
The content of the invention
The purpose of the present invention is to overcome defect of the prior art, mainly for lifted bituminous paving high temperature Rut resistance and
The ability of low temperature cracking resistance, there is provided a kind of rubber and plastic for being stably not susceptible to isolate with preferable high temperature performance, heat-storage is combined
Modified pitch and preparation method thereof.
The present invention solves the technical scheme that its technical problem is adopted：A kind of stable rubber and plastic compound modified asphalt of heat-storage,
It is made up of matrix pitch, waste rubber tyre powder, polyethylene and 264 antioxidant, wherein waste rubber tyre powder content is matrix pitch weight
10%～35%, polymerized ethylene content is the 3%～10% of matrix pitch weight, and 264 antioxidant contents are waste rubber tyre powder weight
1.0%～5.0%.
Preferably consist of：Waste rubber tyre powder content is the 15%～30% of matrix pitch weight, and polymerized ethylene content is substrate
The 5%～8% of Colophonium weight, 264 antioxidant contents are the 2.0%～4.0% of waste rubber tyre powder weight.
The needle penetration of the matrix pitch is 40～120dmm, softening point is 30 DEG C～60 DEG C.
Waste rubber tyre powder junked tire Jing powder by made by natural rubber, butadiene-styrene rubber, butadiene rubber or isoprene rubber
Broken to be obtained, the rubber powder granularity of the waste rubber tyre powder is between 20～200 mesh.
The polyethylene waste or used plastics or primary Low Density Polyethylene by made by Low Density Polyethylene are obtained.
The method for preparing the stable rubber and plastic compound modified asphalt of the heat-storage, comprises the steps：
(1) matrix pitch is heated to into heat and melts state, be slowly added to load weighted waste rubber tyre powder, polyethylene and 264 antioxygens
The mixture of agent, stirring makes its mix homogeneously；
(2) when the modified pitch mixture of step 1 being heated to into 170 DEG C～210 DEG C, high speed shear 30～120 minutes, i.e.,
Rubber and plastic compound modified asphalt can be prepared.
The step 1 mesostroma Colophonium heat melts state processing temperature for 120 DEG C～170 DEG C.
The addition time control of waste rubber tyre powder, polyethylene and 264 antioxidant is added to exist in matrix pitch in the step 1
In 10min, the mixture temperature after addition is less than 180 DEG C.
The invention has the beneficial effects as follows：
(1) the density ratio matrix pitch of waste rubber tyre powder is big, easily precipitates in high temperature matrix Colophonium, and low density polyethylene
The density ratio matrix pitch of alkene is little, floats easily in matrix pitch, and by adding 264 antioxidant waste rubber tyre powder, PE and drip are promoted
Cross-linking reaction between green grass or young crops, so as to the waste rubber tyre powder+PE composite modified asphalts for obtaining being difficult to isolate.
(2) waste rubber tyre powder and waste or used plastics are all waste and old salvage material, and its cost is far below modifying agent such as SBS.The present invention
In the waste rubber tyre powder+PE composite modified asphalts of proposition, waste polymer accounts for asphalt quality and may be up to 45%, not only reduces modified
Colophonium cost, and waste rubber tyre powder and useless PE materials have been recycled, reduce its pollution on the environment.
(3) waste rubber tyre powder+PE composite modified asphalts proposed by the present invention possess good high temperature Rut resistance, low temperature cracking resistance
And thermal storage stability, isolation is not susceptible to, processing technique is simple, with good application prospect.
Specific embodiment
With reference to embodiment, the invention will be further described, but not thereby limiting the invention.
According to this patent methods described and step, 5 composite modified asphalt samples, Ju Ti Pei Fang and evaluation are prepared for respectively
Embodiment 1～5 in the results are shown in Table 1；2 comparative examples for preparing with step in the same way, Ju Ti Pei Fang and evaluation knot
Comparative example 1,2 in being really shown in Table 1.Concrete preparation method is operated in accordance with the following steps：
(1) matrix pitch is heated to into heat and melts state, processing temperature scope is 145 DEG C～160 DEG C.It is slowly added to weigh
Waste rubber tyre powder, PE and 264 antioxidant mixture, the addition time should be controlled in 10min.Low velocity shear stirring mixes it
Close uniform, shear rate is 1500～2000r/min, and the temperature control of mixture is below 180 DEG C.Wherein 264 antioxidant are
Universal phenolic antioxidant, chemical name is 2,6- di-tert-butyl-4-methy phenols, and molecular formula is C15H24O, structural formula is
(2) when asphalt mixture being heated to into 185 DEG C～190 DEG C, high-speed shearing machine shear rate is adjusted to 3000～
4000r/min, shears 45～60min, prepares waste rubber tyre powder+PE composite modified asphalts.
The different formulations performance of modified bitumen contrast table of table 1
Method of testing：1st, modified pitch softening point, DEG C：ASTM D36, Chinese T 0606-2000
2nd, modified pitch BBR index Ss, MPa, m：AASHTO：TP1-98
3rd, modified pitch isolation experiment, DEG C：Chinese T 0661-2011
4th, modified pitch DSR indexs G*/sin δ, kPa：AASHTO TP5-93
By table 1 isolate experiment △ t, DSR and BBR indexs can be seen that it is useless with traditional waste rubber powder modified asphalt or routine
Tire rubber powder+PE modified pitch (comparative example 1, comparative example 2) is compared, waste rubber tyre powder+PE composite modified asphalt energy proposed by the present invention
Improve high temperature, cryogenic property and the thermal storage stability energy of Colophonium simultaneously, be not susceptible to isolation, isolation experiment softening point difference △ t
2.5 DEG C are smaller than, Chinese modified pitch related specifications are met.Therefore, the composite modified asphalt for being prepared with the present invention can be complete
Portion or moiety substituent matter Colophonium and polymer modified asphalt are applied to the fields such as road, building, water conservancy.
Claims (7)
1. the stable rubber and plastic compound modified asphalt of a kind of heat-storage, it is characterised in that：By matrix pitch, waste rubber tyre powder, polyethylene
Make with 264 antioxidant, wherein waste rubber tyre powder content is the 10%～35% of matrix pitch weight, and polymerized ethylene content is substrate drip
The 3%～10% of blue or green weight, 264 antioxidant contents are the 1.0%～5.0% of waste rubber tyre powder weight；
The rubber and plastic compound modified asphalt is obtained by following methods：
(1) matrix pitch is heated to into heat and melts state, be slowly added to load weighted waste rubber tyre powder, polyethylene and 264 antioxidant
Mixture, stirring makes its mix homogeneously；
(2) when the modified pitch mixture of step (1) being heated to into 170 DEG C～210 DEG C, high speed shear 30～120 minutes, you can
Prepare rubber and plastic compound modified asphalt.
2. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1, it is characterised in that：By matrix pitch,
Waste rubber tyre powder, polyethylene and 264 antioxidant are made, and wherein waste rubber tyre powder content is the 15%～30% of matrix pitch weight, poly- second
Alkene content is the 5%～8% of matrix pitch weight, and 264 antioxidant contents are the 2.0%～4.0% of waste rubber tyre powder weight.
3. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1 or 2, it is characterised in that：The base
Matter penetration of bitumens is 40～120 dmm, softening point is 30 DEG C～60 DEG C.
4. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1 or 2, it is characterised in that：It is described useless
Tire rubber powder junked tire by made by natural rubber, butadiene-styrene rubber, butadiene rubber or isoprene rubber is size-reduced to be obtained, the damaged tire
The rubber powder granularity of rubber powder is between 20～200 mesh.
5. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1 or 2, it is characterised in that：It is described poly-
Ethylene waste or used plastics or primary Low Density Polyethylene by made by Low Density Polyethylene are obtained.
6. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1 or 2, it is characterised in that：The rubber
In the preparation method of modeling composite modified asphalt, step (1) mesostroma Colophonium heat melts state processing temperature for 120 DEG C～170 DEG C.
7. the stable rubber and plastic compound modified asphalt of heat-storage according to claim 1 or 2, it is characterised in that the rubber
In the preparation method of modeling composite modified asphalt, waste rubber tyre powder, polyethylene and 264 antioxygens are added in matrix pitch in step (1)
In 10min, the mixture temperature after addition is less than 180 DEG C to the addition time control of agent.
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| CN201410742568.0A CN104479376B (en) | 2014-12-08 | 2014-12-08 | Rubber-plastic composite modified asphalt with stable thermal storage and preparation method thereof |
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| CN104479376B true CN104479376B (en) | 2017-04-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604397A (en) * | 2012-02-15 | 2012-07-25 | 上海交通大学 | Polyolefin hybrid asphalt with stable thermal storage and preparation method thereof |
| CN103360774A (en) * | 2013-08-08 | 2013-10-23 | 山东建筑大学 | Asphaltized rubber modified asphalt and preparation method thereof |
| CN103554937A (en) * | 2013-11-18 | 2014-02-05 | 宁波市政工程建设集团股份有限公司 | Anti-rut agent, asphalt material added with anti-rut agent and preparation method thereof |
| CN103709770A (en) * | 2013-12-26 | 2014-04-09 | 中华人民共和国泰州出入境检验检疫局 | Polyethylene/rubber powder blend modified asphalt and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604397A (en) * | 2012-02-15 | 2012-07-25 | 上海交通大学 | Polyolefin hybrid asphalt with stable thermal storage and preparation method thereof |
| CN103360774A (en) * | 2013-08-08 | 2013-10-23 | 山东建筑大学 | Asphaltized rubber modified asphalt and preparation method thereof |
| CN103554937A (en) * | 2013-11-18 | 2014-02-05 | 宁波市政工程建设集团股份有限公司 | Anti-rut agent, asphalt material added with anti-rut agent and preparation method thereof |
| CN103709770A (en) * | 2013-12-26 | 2014-04-09 | 中华人民共和国泰州出入境检验检疫局 | Polyethylene/rubber powder blend modified asphalt and preparation method thereof |
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