CN103881405A - Waste rubber powder modified asphalt and preparation method thereof - Google Patents
Waste rubber powder modified asphalt and preparation method thereof Download PDFInfo
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- CN103881405A CN103881405A CN201410137564.XA CN201410137564A CN103881405A CN 103881405 A CN103881405 A CN 103881405A CN 201410137564 A CN201410137564 A CN 201410137564A CN 103881405 A CN103881405 A CN 103881405A
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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 discloses a waste rubber powder modified asphalt relating to the technical field of asphalt compositions. Raw materials are composed of the following materials by weight ratio: asphalt, waste rubber powder, a desulfurizing agent, a softening agent, a vulcanizing agent and a vulcanization accelerator. A preparation method comprises the following steps of (1) pouring the asphalt into a reaction kettle, heating, adding the waste rubber powder, the desulfurizing agent and the softening agent into the reaction kettle to uniformly mix, and raising the temperature; and (2) smashing the waste rubber powder to 150-200 meshes to be added to a vulcanizing tank and adding the vulcanizing agent and the vulcanization accelerator. According to the preparation method, the waste rubber powder is directly added into the asphalt and then the desulfurizing agent is added so that the rubber powder is heated for swelling and desulfurized simultaneously in the reaction kettle, production equipment is saved, special rubber powder desulfurizing equipment is not used, the mixing amount of the waste rubber powder is large, the production cost is reduced, the production processes are reduced, the desulfurizing time is long, desulfurization is complete, and the production efficiency is high.
Description
Technical field
The present invention relates to bituminous composition technical field.
Background technology
Along with socioeconomic development, road Traffic Volume is increasing, and axle is heavy also more and more heavier, and road pavement infringement is larger, has a strong impact on work-ing life and the socioeconomic development of road.Occur that this situation is relevant with the matrix material-pitch on road surface to a great extent, therefore must carry out improved properties to pitch, to improve above-mentioned condition.
Adopt various polymer modified asphalts can greatly improve the use properties of bituminous pavement, the high temperature anti-current of polymer modified asphalt is dropped down compared with plain asphalt, low temperature cracking resistance ability can improve greatly, ageing-resistant and weathering resistance strengthens, and the adhesive capacity of building stones also strengthens.With improving significantly permanent deformation resistance, temperature resistance draw ability and antifatigue cracking ability in the road surface of polymer modified asphalt making.Due to the generation of these premium propertiess, polymer modified asphalt becomes important in road oil, is bringing into play more and more important effect in highway pavior.
Conventional polymkeric substance is SBS at present, SBR, and EVA, the materials such as PE, these all belong to the starting material of basic industry, expensive, and pitch modification technique complexity.According to document announcement, interpolation waste rubber powder can be improved the quality of pitch.Waste rubber powder is as resource reutilization, in improving asphalt quality, reduced product cost, alleviated environmental stress, realized and turning waste into wealth.
Rubber is a kind of polymer mesh material, is the elastomerics that force of cohesion is huge under normality, depends merely on simple heat energy, mechanical energy and is difficult to a large amount of rubber powders to be scattered in equably in pitch.Conventional method is first by rubber powder desulfurization in special sweetener, and then the rubber powder after desulfurization is added in pitch and produced, produce like this rubber modified asphalt complex process, need special sweetener, not only production cost is high, and production efficiency is low, also increase the probability of environmental pollution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of rubber crumb modified asphalt and preparation method thereof, directly rubber powder is added and in pitch, add again sweetening agent, rubber powder is heated in swelling in reactor and carry out desulfurization, avoid first rubber powder being carried out to desulfurization in traditional method and added again the wasting of resources causing in pitch, method has been saved production unit, do not use special rubber powder sweetener, and waste rubber powder volume is large, not only reduce production cost, reduce production process, and desulfurization time is long, desulfurization is abundant, production efficiency is high.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 60～70% waste rubber powder 25～35% sweetening agent 1～2% tenderizer 3～5% vulcanizing agent 0.5～1% vulcanization accelerators 0.3～0.8%.
Sweetening agent is 4-tert.-butylbenzene thiophenol zinc, pentachlorothiophenol, Diphenyl disulfide compound, 2,2-dibenzamidodiphenyl disulfide or endor.
Tenderizer is C 9 petroleum resin.
Vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator.
Vulcanizing agent is sulphur.
The preparation method of rubber crumb modified asphalt, comprises the following steps:
(1) by weight ratio pitch is dropped in reactor, be heated to 160～180 ℃, waste rubber powder, sweetening agent, tenderizer are added in reactor, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) by high-speed shearing machine, the waste rubber powder in said mixture is crushed to 150～200 orders, the mixture after pulverizing is added in vulcanizing boiler, and add vulcanizing agent and vulcanization accelerator, stir and vulcanize.Rubber is a kind of polymer mesh material.Under normality, be the elastomerics that force of cohesion is huge, depend merely on simple heat energy, mechanical energy and be difficult to a large amount of rubber powders to be scattered in equably in pitch.Detection and the Experiment Road of chamber to rubber modified asphalt material shows by the result of Performance Detection by experiment, and volume and the uniformity coefficient of waste rubber powder in pitch understood quality and the pavement performance that directly affect pitch.
Conventional rubber crumb modified asphalt is first by the rubber powder desulfurization of thin (60～80 order) of fineness, then add in pitch by stirring, mix and heating swelling forming, waste rubber powder is filled in the middle of pitch with the solid particulate state suspending, the mechanical property of high molecular polymer can not be given full play to, can not form the degree of freedom that string bag effect limits pitch, therefore can not improve better the quality of pitch.Because solid particulate filling suspends, its system rather unstable, is easy to cause laminated segregation, and volume little (generally only can mix to 15～20%).
The inventive method is by chemical energy, heat energy and the mechanical energy reasonable disposition that mutually combines.Concrete way is: first heavy traffic paving asphalt is added in reactor, the auxiliary agent such as waste rubber powder, sweetening agent, tenderizer that drops into again fineness thick (20～30 order) while being heated to 160～180 ℃, heated and stirred, makes its swelling, desulfurization, make S-S key, S-C bond rupture.The tridimensional network of rubber powder becomes linear structure gradually, molecular weight from large to small, the elasticity of waste old powder particles will slowly lose, molcohesion also reduces gradually, now just can be by rubber powder fragmentation with very little mechanical force, use high speed shear function to hand over rubber powder to be trimmed to 100～150 orders and finally make rubber molecule be scattered in equably in pitch with linear structure.For making rubber recover original good physics, mechanical characteristic, then add vulcanizing agent, vulcanization accelerator to vulcanize (crosslinking reaction) to rubber, make the rubber molecule of linear structure again be cross-linked into tridimensional network by S-S key, S-C key.Doing like this rubber is to be dispersed in the middle of pitch with molecularity, can fully demonstrate the mechanical characteristics such as soft, the bullet of rubber, the quality of pitch is fully improved, and waste rubber powder volume is large, can reach 35%.
In actual production, the economic fineness of producing waste rubber powder is 20～30 orders, if exceed 40 orders, the production efficiency of waste rubber powder will sharply decline, production cost improves a lot, produces one ton of 60～80 object rubber powder and improves approximately 1000 yuan more than than producing 20～30 object rubber powder costs, take rubber powder average content 30% as example, produce one ton of rubber modified asphalt, cost will improve 300 yuan of left and right.And the present invention is by Hybrid Heating such as rubber, pitch and sweetening agents, then with shears, 20～40 object rubber powders are cut into 100～150 orders, only 5 yuan of institute per ton power consumption expenses, can reduce costs and can greatly improve the incorporation of waste rubber powder.
Conventional sulfur method is rubber powder to be passed through in special sweetener to high temperature desulfurizing, and desulfurization time is long, and environment is had to pollution.Then the rubber powder after desulfurization is added in pitch, to reheat swellingly, repeat like this long-time heating, energy consumption is high, and production efficiency is low, and production cost is high.The long-time heat of rubber powder will cause rubber degraded excessively, larger to rubber molecular chain infringement.The inventive method directly adds rubber powder in pitch and adds sweetening agent again, rubber powder is heated in swelling in reactor and carry out desulfurization, and such method has been saved production unit, not only reduce production cost, reduced production process, and desulfurization is abundant, production efficiency is high.
Diphenyl disulfide compound can be accelerated by chemical action the fracture of rubber molecule, can obviously improve rubber plastic solution efficiency, thereby saves the energy, and this material is nontoxic, pollution-free, mould and separate effectively, and ageing of rubber performance, without impact, is specially adapted to high temperature and moulds solution.
The beneficial effect that adopts technique scheme to produce is:
The inventive method directly adds rubber powder and in pitch, adds sweetening agent again, rubber powder is heated in swelling in reactor and carry out desulfurization, avoid first rubber powder being carried out to desulfurization in traditional method and added again the wasting of resources causing in pitch, saved production unit, do not used special rubber powder sweetener, and waste rubber powder volume is large, can reach 35%, not only reduce production cost, reduce production process, and desulfurization time is long, desulfurization is abundant, production efficiency is high.
Embodiment
Embodiment 1
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 68% waste rubber powder 25% sweetening agent 2% tenderizer 3.5% vulcanizing agent 1% vulcanization accelerator 0.5%.
Sweetening agent is Diphenyl disulfide compound, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 68Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 25Kg waste rubber powder, 2Kg sweetening agent, 3.5Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, said mixture is added in vulcanizing boiler, and in vulcanizing boiler, add 1Kg vulcanizing agent and 0.5Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Embodiment 2
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 62.5% waste rubber powder 30% sweetening agent 2% tenderizer 4% vulcanizing agent 1% vulcanization accelerator 0.5%.
Sweetening agent is Diphenyl disulfide compound, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 62.5Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 30Kg waste rubber powder, 2Kg sweetening agent, 4Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, the mixture after pulverizing is added to vulcanizing boiler, and in vulcanizing boiler, add 1Kg vulcanizing agent and 0.5Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Embodiment 3
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 60% waste rubber powder 35% sweetening agent 1% tenderizer 3% vulcanizing agent 0.5% vulcanization accelerator 0.5%.
Sweetening agent is Diphenyl disulfide compound, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 60Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 35Kg waste rubber powder, 1Kg sweetening agent, 3Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, mixture after pulverizing is added in vulcanizing boiler, and in vulcanizing boiler, add 0.5Kg vulcanizing agent and 0.5Kg vulcanization accelerator, stir, vulcanize 30 minutes.
Embodiment 4
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 63.5% waste rubber powder 30% sweetening agent 1% tenderizer 4% vulcanizing agent 1% vulcanization accelerator 0.5%.
Sweetening agent is Diphenyl disulfide compound, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 635Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 300Kg waste rubber powder, 10Kg sweetening agent, 40Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, the mixture after pulverizing is added in vulcanizing boiler, and in vulcanizing boiler, add 10Kg vulcanizing agent and 5Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Waste and old rubber modified asphalt to embodiment 1 to 4 preparation has carried out a large amount of tests, test method is undertaken by the relevant rules of the ministerial standard JTJ052-2000 of the Ministry of Communications " highway engineering Asphalt Mixture Experiment rules ", test-results detects index by the related request of the ministerial standard JT/T798-2001 of Department of Transportation " highway engineering waste rubber tyre powder rubber asphalt ", and experimental result is as shown in the table:
As seen from the above table, rotary viscosity, penetration degree, softening temperature, recovery of elasticity, the ductility indices of the waste and old rubber modified asphalt that formula of the present invention and preparation method produce meets the related request of traffic ministerial standard JT/T798-2001 " highway engineering waste rubber tyre powder rubber asphalt ", illustrates that this product has good pavement performance.
Embodiment 5～10
A kind of rubber crumb modified asphalt, raw materials by weight composition sees the following form, and preparation method and all the other parameters are with embodiment 1.
Detection to rubber modified asphalt material and Experiment Road show by the result of Performance Detection by experiment, and volume and the uniformity coefficient of waste rubber powder in pitch understood quality and the pavement performance that directly affect pitch.Under same test conditions, the testing data of different rubber powder volumes refers to following table:
Conventional rubber crumb modified asphalt is that waste rubber powder is swelling by simple physical mixed and heating, waste rubber powder is filled in the middle of pitch with the solid particulate state suspending, the mechanical property of high molecular polymer can not be given full play to, the degree of freedom that string bag effect limits pitch can not be formed, and the quality of pitch can not be improved better.Because solid particulate filling suspends, its system rather unstable, is easy to cause laminated segregation, and volume little (generally only can mix to 15～20%), rubber crumb modified asphalt prepared by the present invention, and the volume of waste old can reach 35%.
Embodiment 11
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 68% waste rubber powder 26% sweetening agent 1.1% tenderizer 3.9% vulcanizing agent 0.6% vulcanization accelerator 0.4%.
Sweetening agent is 4-tert.-butylbenzene thiophenol zinc, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 68Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 26Kg waste rubber powder, 1.1Kg sweetening agent, 3.9Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, said mixture is added in vulcanizing boiler, and in vulcanizing boiler, add 0.6Kg vulcanizing agent and 0.4Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Embodiment 12
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 62.5% waste rubber powder 30% sweetening agent 2% tenderizer 4% vulcanizing agent 1% vulcanization accelerator 0.5%.
Sweetening agent is pentachlorothiophenol, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 62.5Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 30Kg waste rubber powder, 2Kg sweetening agent, 4Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, the mixture after pulverizing is added to vulcanizing boiler, and in vulcanizing boiler, add 1Kg vulcanizing agent and 0.5Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Embodiment 13
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 61% waste rubber powder 33% sweetening agent 1.3% tenderizer 3.4% vulcanizing agent 0.7% vulcanization accelerator 0.6%.
Sweetening agent is 2,2-dibenzamidodiphenyl disulfide, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 61Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 33Kg waste rubber powder, 1.3Kg sweetening agent, 3.4Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, mixture after pulverizing is added in vulcanizing boiler, and in vulcanizing boiler, add 0.7Kg vulcanizing agent and 0.6Kg vulcanization accelerator, stir, vulcanize 30 minutes.
Embodiment 14
A kind of rubber crumb modified asphalt, raw material is made up of following material by weight ratio: pitch 63.5% waste rubber powder 30% sweetening agent 1% tenderizer 4% vulcanizing agent 1% vulcanization accelerator 0.5%.
Sweetening agent is endor, and tenderizer is C 9 petroleum resin, and vulcanizing agent is sulphur, and vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator; Rubber powder is the rubber powder of junked tire fragmentation, and fineness is 20～40 orders; Pitch is heavy-duty road asphalt.
Preparation method, comprises the following steps:
(1) 635Kg heavy-duty road asphalt is dropped in reactor, while being heated to 160～180 ℃, drop into 300Kg waste rubber powder, 10Kg sweetening agent, 40Kg tenderizer, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) fineness that is trimmed to waste rubber powder in said mixture by high-speed shearing machine is 150～200 orders, the mixture after pulverizing is added in vulcanizing boiler, and in vulcanizing boiler, add 10Kg vulcanizing agent and 5Kg vulcanization accelerator, stirs, sulfuration 30 minutes.
Claims (6)
1. a rubber crumb modified asphalt, is characterized in that: raw material is made up of following material by weight ratio: pitch 60～70% waste rubber powder 25～35% sweetening agent 1～2% tenderizer 3～5% vulcanizing agent 0.5～1% vulcanization accelerators 0.3～0.8%; The granularity of waste rubber powder is 20～40 orders.
2. rubber crumb modified asphalt according to claim 1, is characterized in that described sweetening agent is 4-tert.-butylbenzene thiophenol zinc, pentachlorothiophenol, Diphenyl disulfide compound, 2,2-dibenzamidodiphenyl disulfide or endor.
3. rubber crumb modified asphalt according to claim 1, is characterized in that described tenderizer is C 9 petroleum resin.
4. rubber crumb modified asphalt according to claim 1, is characterized in that described vulcanization accelerator is that dithiocar-bamate is vulcanization accelerator.
5. rubber crumb modified asphalt according to claim 1, is characterized in that described vulcanizing agent is sulphur.
6. the preparation method of the rubber crumb modified asphalt described in any one in claim 1 to 5, is characterized in that comprising the following steps:
(1) by weight ratio pitch is dropped in reactor, be heated to 160～180 ℃, waste rubber powder, sweetening agent, tenderizer are added in reactor, stir above-mentioned substance is mixed, heat up 10～30 ℃;
(2) by high-speed shearing machine, the waste rubber powder in said mixture is crushed to 150～200 orders, the mixture after pulverizing is added in vulcanizing boiler, and add vulcanizing agent and vulcanization accelerator, stir and vulcanize.
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| CN104130482A (en) * | 2014-08-12 | 2014-11-05 | 天津海泰环保科技发展有限公司 | Pasty liquid rubber and preparation method thereof |
| CN104693817A (en) * | 2015-02-12 | 2015-06-10 | 北京路德永泰环保科技有限公司 | Composite-waste-rubber-powder-particle modified asphalt capable of being stored stably and preparation method thereof |
| CN105733275A (en) * | 2014-12-10 | 2016-07-06 | 中国石油天然气股份有限公司 | Rubber asphalt and preparation method thereof |
| CN107325569A (en) * | 2017-08-22 | 2017-11-07 | 四川知行路桥股份有限公司 | A kind of modifying agent for high viscosity compound rubber asphalt |
| CN109384894A (en) * | 2018-09-19 | 2019-02-26 | 张青美 | A kind of processing method of waste tire rubber |
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| CN110698871A (en) * | 2019-11-26 | 2020-01-17 | 北京中交桥宇科技有限公司山东分公司 | Direct-throwing waste rubber powder SBS composite asphalt modifier and preparation method and application thereof |
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| CN104130482A (en) * | 2014-08-12 | 2014-11-05 | 天津海泰环保科技发展有限公司 | Pasty liquid rubber and preparation method thereof |
| CN105733275A (en) * | 2014-12-10 | 2016-07-06 | 中国石油天然气股份有限公司 | Rubber asphalt and preparation method thereof |
| CN105733275B (en) * | 2014-12-10 | 2019-07-05 | 中国石油天然气股份有限公司 | Rubber asphalt and preparation method thereof |
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