CN112778776A - Waste rubber powder modified asphalt for roads and preparation method and equipment thereof - Google Patents
Waste rubber powder modified asphalt for roads and preparation method and equipment thereof Download PDFInfo
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- CN112778776A CN112778776A CN202011624652.4A CN202011624652A CN112778776A CN 112778776 A CN112778776 A CN 112778776A CN 202011624652 A CN202011624652 A CN 202011624652A CN 112778776 A CN112778776 A CN 112778776A
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- asphalt
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- rubber powder
- coupling agent
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- 239000002699 waste material Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 21
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- 239000012744 reinforcing agent Substances 0.000 claims abstract description 20
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 239000006229 carbon black Substances 0.000 claims abstract description 8
- UZGARMTXYXKNQR-UHFFFAOYSA-K 7,7-dimethyloctanoate;neodymium(3+) Chemical compound [Nd+3].CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O.CC(C)(C)CCCCCC([O-])=O UZGARMTXYXKNQR-UHFFFAOYSA-K 0.000 claims abstract description 5
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- 238000010528 free radical solution polymerization reaction Methods 0.000 claims abstract description 5
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- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 5
- ARWCRSVRKCNEDI-UHFFFAOYSA-K neodymium(3+);octanoate Chemical compound [Nd+3].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O.CCCCCCCC([O-])=O ARWCRSVRKCNEDI-UHFFFAOYSA-K 0.000 claims abstract description 5
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- 239000000377 silicon dioxide Substances 0.000 claims description 12
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 8
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- 239000000806 elastomer Substances 0.000 claims description 8
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- 229920000131 polyvinylidene Polymers 0.000 claims description 6
- 239000006235 reinforcing carbon black Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 4
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- -1 alkylaluminum compound Chemical class 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 4
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a waste rubber powder modified asphalt for roads and a preparation method and equipment thereof, wherein the modified asphalt comprises a coupling agent, a color former and a reinforcing agent, and the coupling agent is constructed to increase the wear resistance of tires; the color former is configured to be rigid to the tire; the reinforcing agent is configured to interact with the reinforcement of the rubber of the tire with the carbon black. The coupling agent comprises a cis-1, 4-polybutadiene product in organic solvent solution polymerization reaction of 1, 3-butadiene monomer, and a catalyst is added into the coupling agent, wherein the catalyst comprises neodymium neodecanoate, neodymium octoate and neodymium Vaseline. The coupling agent, the color former and the reinforcing agent can obviously improve the high-temperature stability and the elastic recovery capability of the asphalt, reduce the melt viscosity of the styrene-butadiene-styrene block copolymer and improve the fluidity of the polymer; the crude saturated components in the asphalt are mutually soluble with the asphaltenes, so that the dispersion degree of the asphaltenes is improved, and the low-temperature performance of the asphalt is improved, thereby improving the low-temperature crack resistance of the asphalt mixture.
Description
Technical Field
The invention relates to asphalt modification, in particular to waste rubber powder modified asphalt for roads and a preparation method and equipment thereof.
Background
The rubber powder prepared from the waste tires can fully utilize resources and reduce environmental pollution, the ageing resistance and the fatigue resistance of the asphalt prepared from the rubber powder modified asphalt are generally superior to those of common asphalt mixtures, and the high-temperature stability, the low-temperature crack resistance and the ageing resistance of the asphalt can be improved after the asphalt is fully mixed and developed.
For example, the prior art of CN101555355B discloses a waste rubber modified asphalt, and at present, the rubber powder modified asphalt is concerned and paid attention to by people with excellent performance and resource environmental protection property and is gradually raised in China, but the rubber powder modified asphalt has the defects of unstable performance (poor storage stability), high design requirement of mixture mixing ratio and the like. The modified asphalt is widely used due to its excellent combination of properties, but it also has the disadvantages of high price and poor aging resistance. Another typical epoxy rubber asphalt modified coating disclosed in the prior art of WO2016078156a1 and a preparation method thereof, and a polymer modified asphalt disclosed in the prior art of WO2011057443a1 and a preparation method thereof, the existing coating has certain defects, the asphalt in the coating is easy to cold and crisp, crack and have hot flowing property, but the asphalt has the advantages of water resistance and impermeability, and the existing coating has the advantages of the asphalt and cannot avoid the disadvantages of the asphalt, and has poor high-temperature stability, good construction easiness and difficulty in paving.
The invention is made in order to solve the problems of lack of manufacturing equipment, uneven mixing, easy crack stability and poor storage stability, etc. which are common in the field.
Disclosure of Invention
The invention aims to provide a waste rubber powder modified asphalt for roads and a preparation method and equipment thereof, aiming at the defects existing in the utilization of the prior rubber waste.
In order to overcome the defects of the prior art, the invention adopts the following technical scheme:
a waste rubber powder modified asphalt for a road, comprising a coupling agent, a color former and a reinforcing agent, the coupling agent being configured to increase wear resistance of a tire; the color former is configured to provide stiffness to the tire; the reinforcing agent is configured to interact with the reinforcement of the rubber of the tire with the carbon black.
Optionally, the coupling agent comprises a cis-1, 4-polybutadiene product in an organic solvent solution polymerization reaction of 1, 3-butadiene monomer, and a catalyst is added to the coupling agent, wherein the catalyst comprises at least one of neodymium neodecanoate, neodymium octoate and neodymium vaseline acid.
Optionally, the color former comprises 1, 4-polybutadiene elastomer, polyvinylidene elastomer, rubber reinforcing carbon black and precipitated silica and a specified silica coupling agent, wherein the polyvinylidene elastomer comprises at least one of cis-1, 4-polyisoprene, styrene/butadiene, isoprene/butadiene and 3, 4-polyisoprene elastomer.
Optionally, the reinforcing agent comprises 30 to 90phr of the rubber reinforcing carbon black and 10 to 70phr of the precipitated silica, wherein a masterbatch for making a tire may comprise 100phr of a rubber reinforcing carbon backing.
Alternatively, the 1, 4-polybutadiene has a microstructure consisting of 90% to 99% of cis-1, 4-isomer units, a number average molecular weight in the range of 90,000 to 180,000, and a heterogeneity index (Mw/Mn) in the range of 2.5/1 to 5/1.
Optionally, the catalyst is in the presence of a catalyst consisting of a neodymium compound, optionally together with an alkylaluminum compound and an aluminum chloride transfer compound.
In addition, a waste rubber powder modified asphalt preparation device for roads is provided, the preparation device comprises a screening device, a mixing device, an adjusting device, a heating device, an early warning device and a processor, wherein the screening device is configured to screen the rubber powder, the mixing device is configured to mix the rubber particles and asphalt, and the adjusting device is configured to dynamically adjust the mixing ratio of the rubber particles and the asphalt; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust a ratio of the adjustment device based on detected data.
The beneficial effects obtained by the invention are as follows:
1. the shearing device is used for cutting or shearing rubber, so that the rubber can be changed into rubber powder, and the rubber powder is used for preparing rubber asphalt and applied to adhesive layer pavement engineering, so that the adhesive layer service performance can be improved, resources can be saved, and the environment can be protected;
2. the early warning device is adopted to send out an early warning or regulating instruction, the parameters of the heating device, the mixing device and the adjusting device are fed back, dynamic adjustment is realized, the modified asphalt can be uniformly mixed, the stability is good, the storage stability can be improved, and the optimal use state is achieved;
3. an operation for mixing rubber powder and asphalt by using the heating device and an operation for heating the mixed modified asphalt product based on the purpose of the asphalt to be performed;
4. through the matching use between the adjusting component and the circulating mechanism, redundant rubber particles or asphalt can be transported through the circulating device;
5. the rubber granules can be thinner under the further shearing operation of the shearing component arranged in the shearing cavity by adopting the spacing component which is configured to the shearing cavity and the mixing cavity;
6. the angle of the first and second screening nets is adjusted by the offset member so that the filtering operation of the rubber particles can be adjusted according to actual needs, for ensuring that the rubber particles can be screened out.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic control flow diagram of the present invention.
Fig. 2 is a schematic structural view of the mixing device.
Fig. 3 is a schematic view of the structure at a-a in fig. 2.
Fig. 4 is a schematic cross-sectional view of the metering mechanism and the circulation mechanism.
Fig. 5 is a schematic cross-sectional view of the adjustment plate and the adjustment track.
Fig. 6 is a schematic right view of the tiling member.
Fig. 7 is a schematic top view of the tiling member.
The reference numbers illustrate: 1-a shearing cavity; 2-a partition plate; 3-a spacer member; 4-a shearing member; 5-a mixing member; 6-a mixing chamber; 7-a circulation channel; 8-a poking plate; 9-a transportation track; 10-an adjusting plate; 11-an adjusting seat; 12-a position marker; 13-a metering tube; 14-a plugging unit; 15-a sliding track; 16-a supply tank; 17-a flat board.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper" and "lower" and "left" and "right" etc., it is only for convenience of description and simplification of the description based on the orientation or positional relationship shown in the drawings, but it is not indicated or implied that the device or assembly referred to must have a specific orientation.
The first embodiment is as follows: a waste rubber powder modified asphalt for a road, comprising a coupling agent, a color former and a reinforcing agent, the coupling agent being configured to increase wear resistance of a tire; the color former is configured to provide stiffness to the tire; the reinforcing agent is configured to interact with the reinforcement of the rubber of the tire with the carbon black.
The coupling agent comprises a cis-1, 4-polybutadiene product in organic solvent solution polymerization reaction of 1, 3-butadiene monomer, and a catalyst is added into the coupling agent, wherein the catalyst comprises at least one of neodymium neodecanoate, neodymium octoate and neodymium vaseline acid.
The color former includes 1, 4-polybutadiene elastomer, polyvinylidene elastomer including at least one of cis-1, 4-polyisoprene, styrene/butadiene, isoprene/butadiene and 3, 4-polyisoprene, rubber reinforced carbon black and precipitated silica and specified silica coupling agents.
The reinforcing agent comprises 30 to 90phr of the rubber reinforcing carbon black and 10 to 70phr of the precipitated silica, wherein a masterbatch for making a tire may comprise 100phr of a rubber reinforcing carbon backing.
The 1, 4-polybutadiene has a microstructure composed of 90% to 99% of cis-1, 4-isomer units, a number average molecular weight in the range of 90,000 to 180,000, and a heterogeneity index (Mw/Mn) in the range of 2.5/1 to 5/1.
The catalyst is optionally together with an alkylaluminum compound and an aluminum chloride transfer compound in the presence of a catalyst consisting of a neodymium compound.
In addition, a waste rubber powder modified asphalt preparation device for roads is provided, the preparation device comprises a screening device, a mixing device, an adjusting device, a heating device, an early warning device and a processor, wherein the screening device is configured to screen the rubber powder, the mixing device is configured to mix the rubber particles and asphalt, and the adjusting device is configured to dynamically adjust the mixing ratio of the rubber particles and the asphalt; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust a ratio of the adjustment device based on detected data.
Example two in real time: the rubber powder prepared from the waste tires can fully utilize resources and reduce environmental pollution, the ageing resistance and the fatigue resistance of the asphalt prepared from the rubber powder modified asphalt are generally superior to those of common asphalt mixtures, and the high-temperature stability, the low-temperature crack resistance and the ageing resistance of the asphalt can be improved after the asphalt is fully mixed and developed.
The prior art for modifying the asphalt by the waste rubber powder has the defects of lack of manufacturing equipment, uneven mixing, poor cracking stability, poor storage stability and the like.
A waste rubber powder modified asphalt for a road, comprising a coupling agent, a color former and a reinforcing agent, the coupling agent being configured to increase wear resistance of a tire; the color former is configured to provide stiffness to the tire; the reinforcing agent is configured to interact with the reinforcement of the rubber of the tire with the carbon black.
The coupling agent comprises a cis-1, 4-polybutadiene product in organic solvent solution polymerization reaction of 1, 3-butadiene monomer, and a catalyst is added into the coupling agent, wherein the catalyst comprises at least one of neodymium neodecanoate, neodymium octoate and neodymium vaseline acid.
The color former includes 1, 4-polybutadiene elastomer, polyvinylidene elastomer including at least one of cis-1, 4-polyisoprene, styrene/butadiene, isoprene/butadiene and 3, 4-polyisoprene, rubber reinforced carbon black and precipitated silica and specified silica coupling agents.
The reinforcing agent comprises 30 to 90phr of the rubber reinforcing carbon black and 10 to 70phr of the precipitated silica, wherein a masterbatch for making a tire may comprise 100phr of a rubber reinforcing carbon backing.
The 1, 4-polybutadiene has a microstructure composed of 90% to 99% of cis-1, 4-isomer units, a number average molecular weight in the range of 90,000 to 180,000, and a heterogeneity index (Mw/Mn) in the range of 2.5/1 to 5/1.
The catalyst is optionally together with an alkylaluminum compound and an aluminum chloride transfer compound in the presence of a catalyst consisting of a neodymium compound.
In addition, a waste rubber powder modified asphalt preparation device for roads is provided, the preparation device comprises a screening device, a mixing device, an adjusting device, a heating device, an early warning device and a processor, wherein the screening device is configured to screen the rubber powder, the mixing device is configured to mix the rubber particles and asphalt, and the adjusting device is configured to dynamically adjust the mixing ratio of the rubber particles and the asphalt; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust a ratio of the adjustment device based on detected data.
The embodiment has the following technical effects: the coupling agent, the color former and the reinforcing agent can obviously improve the high-temperature stability and the elastic recovery capability of the asphalt, reduce the melt viscosity of the styrene-butadiene-styrene block copolymer and improve the fluidity of the polymer; the coupling agent, the color former and the reinforcing agent can promote the mutual solubility of the crude saturated components in the asphalt and the asphaltene, improve the dispersion degree of the asphaltene and improve the low-temperature performance of the asphalt, thereby improving the low-temperature crack resistance of the asphalt mixture; the coupling agent, the color former and the reinforcing agent can reduce the high-temperature viscosity of the asphalt, further reduce the mixing and compacting temperature of the asphalt mixture and solve the problem of higher construction temperature of the existing high-viscosity asphalt modifier. The preparation method of the coupling agent, the color former and the reinforcing agent adopts fed batch, can avoid the agglomeration phenomenon of each component, and can ensure the short-term aging performance of the prepared modified asphalt by separately melting; the mixture of the coupling agent, the color former and the reinforcing agent prepared by the invention has greatly improved low-temperature deformation capability and fatigue cracking resistance compared with the common modified asphalt mixture on the basis of ensuring high-temperature stability, and effectively improves the conditions that the common modified mixture is easy to crack at low temperature and fatigue cracking.
Example three: the present embodiment should be understood to include at least all the features of any one of the foregoing embodiments and further improve on the same, and in particular, provide a method and an apparatus for preparing asphalt modified with waste rubber powder for roads, the apparatus includes a screening device, a mixing device, an adjusting device, a heating device, an early warning device and a processor, the screening device is configured to screen the rubber powder, the mixing device is configured to mix the rubber particles and asphalt, and the adjusting device is configured to dynamically adjust the mixing ratio of the rubber particles and asphalt; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust the proportion of the adjustment device based on detected data; specifically, the screening device and the mixing device are matched for use, so that the properties of the asphalt can be accurately determined after the operations of screening and mixing the rubber powder and the asphalt piece are performed; in this embodiment, the adjusting device and the heating device are used in a matching manner, so that the heating device and the early warning device are used in a matching manner, and the detection device is dynamically adjusted and operated by regulating and controlling the devices if the finished products between the asphalts are detected by the early warning device and do not meet the set requirements or the finished products, thereby effectively ensuring that the whole asphalt preparation process can be efficiently unfolded; the processor is respectively in control connection with the screening device, the mixing device, the adjusting device, the heating device and the early warning device, and is used for performing centralized control on all the devices under the control of the processor and ensuring that the asphalt is prepared or the asphalt property is effectively developed and detected; in this embodiment, the preparation equipment further comprises a shearing device, wherein the shearing device is configured to cut or shear rubber, so that the rubber can be changed into rubber powder, and the rubber powder is used for preparing rubber asphalt and applied to a bonding layer pavement project, so that the use performance of the bonding layer can be improved, resources can be saved, and the environment can be protected; the rubber asphalt can be used as a cementing material for various road surfaces, and can obviously reduce traffic noise by 5-8 dB; the aging of the asphalt adhesive layer is slowed down, and the service life is prolonged; the adhesive force is strong, the wear resistance and the water stripping resistance are greatly improved; the tear resistance of the pavement in winter and the melting deformation resistance of the pavement in summer are improved; the adhesiveness of the modified asphalt and the acidic stone is improved;
the screening device comprises a vibration mechanism, a screening mechanism and a supply mechanism, wherein the vibration mechanism is configured to be in driving connection with the screening mechanism, and the supply mechanism is configured to transport the rubber particles; the screening mechanism comprises a first screening net, a second screening net and a biasing member configured to adjust an angle between the first screening net and the second screening net; the first screening net and the second screening net are coaxially arranged, and the first screening net is arranged right above the second screening net; specifically, the vibration mechanism comprises a plurality of vibration rods, a vibration seat and a vibration driving mechanism, one end of each vibration rod is connected with the vibration seat, and the vibration driving mechanism is configured to be in driving connection with each vibration rod; the vibrating seat is configured to be connected with the screening mechanism; specifically, the screening mechanism is used for screening the rubber particles or the rubber powder, and adjusting various types of rubber based on production requirements, so that the rubber can be screened out; in this embodiment, the first screening net and the second screening net are stacked on each other, so that the operation of screening rubber granules with different granule sizes is realized under the shifting operation of the shifting member; in the screening process, the first screening net and the second screening net are mutually crossed to form a through hole, and the size of the through hole can be adjusted according to the offset component; in this embodiment, the vibration mechanism is configured to vibrate the screening mechanism, so that the rubber particles can be screened out; in the embodiment, if the rubber particles pass through the passing hole, the rubber particles larger than the passing hole are retained above the passing hole for processing again; one end of each vibrating rod is connected with the vibrating seat, the screening device is arranged in the vibrating seat, and the screening operation of the rubber particles is realized under the vibration operation of the vibrating mechanism; in this embodiment, the vibration mechanism further comprises a vibration sensor configured to detect a magnitude of vibration of the vibrating bar and transmit a signal of the vibration to the processor such that the magnitude of vibration of the vibration mechanism is detected; the offset member is configured to adjust the angles of the first and second screening nets so that the rubber granule filtering operation can be adjusted according to actual needs for ensuring that the rubber granules can be screened out; reprocessing the rubber granules by the screened rubber granules so as to enable the rubber granules to reach proper particle sizes;
additionally, in this embodiment, the supply mechanism includes a transport belt and a transport drive mechanism configured to be drivingly connected to the transport belt; specifically, the rubber crumb or the asphalt can be supplied by the supplying means so that the rubber crumb or the asphalt can be supplied; the conveying belt is in driving connection with the conveying driving mechanism, so that the conveying belt can convey the rubber particles and the asphalt to the screening mechanism for screening operation, and meanwhile, if the unqualified rubber particles exist, the rubber particles are conveyed to the cutting equipment device again through the conveying mechanism for cutting operation;
the mixing device comprises a stirring mechanism and a force detection mechanism, wherein the force detection piece is configured to be arranged on the stirring mechanism, and the force detection mechanism is configured to detect the stirring speed or the stirring force of the stirring mechanism; the stirring mechanism comprises a shearing cavity, a mixing cavity, a shearing member and a mixing member, wherein the shearing member is configured to be arranged in the shearing cavity and cut the rubber strip in the shearing cavity, the mixing member is configured to mix the asphalt and the rubber powder, and the shearing mechanism is arranged above the mixing member; specifically, the mixing device receives the rubber particles or the asphalt from the screening device, and the asphalt and the rubber particles are mixed under the mixing operation of the mixing device; meanwhile, in the embodiment, the mixing device can perform the operation of re-cutting or mixing the materials stored in the shearing cavity and the mixing cavity during the use process; in this embodiment, the stirring mechanism and the mixing mechanism operate simultaneously, and both shearing and mixing operations are considered; in the present embodiment, the shearing chamber is disposed above the mixing chamber, a spacing member is disposed between the shearing chamber and the mixing chamber, the spacing member is configured to enable the shearing chamber and the mixing chamber to enable the rubber particles to be finer under a further shearing operation of the shearing member disposed in the shearing chamber, and the spacing member spaces the rubber particles during the cutting operation; after the rubber particles are sheared in the shearing cavity, the spacing member releases the rubber particles so that the rubber particles enter the mixing cavity; the shearing member is arranged in the shearing chamber and the stirring member is arranged in the mixing chamber, in particular the stirring member and the shearing member are arranged coaxially, i.e.: the stirring member and the shearing member are driven by the same driving mechanism; in addition, the stirring component comprises a stirring rod and a pressure sensor, and the pressure sensor is arranged on the stirring rod and used for detecting the hysteresis force of the stirring rod in the stirring process; in addition, the spacing member comprises a spacing plate and a spacing driving mechanism, and the spacing plate realizes the operation of spacing the shearing cavity and the mixing cavity under the driving operation of the spacing driving mechanism; in this embodiment, the shearing chamber or the mixing chamber is provided with a cavity for the partition member to move, and during the action, the partition plate is driven by the partition driving mechanism to block the shearing chamber and the mixing chamber;
the adjusting device comprises a metering mechanism and a circulating mechanism, wherein the metering mechanism is used for metering the asphalt or the rubber particles, and the circulating mechanism is used for adjusting the redundant content in the metering mechanism; the metering mechanism comprises a metering pipe, a metering component and an adjusting component, wherein the metering component and the adjusting component are arranged in the metering pipe, the metering component comprises a plurality of position marks, a metering rod and a metering driving mechanism, the position marks are distributed at equal intervals along the length direction of the metering pipe, one end of the metering rod is in driving connection with the metering driving mechanism, and the other end of the metering rod extends out in a direction far away from the inner wall of the metering pipe; the adjusting member is configured to adjust the surplus asphalt or the rubber powder; specifically, the adjusting member includes an adjusting rail configured to be disposed on an inner wall of the metering tube, an adjusting seat configured to be slidably connected to the adjusting rail, an adjusting plate configured to be connected to the adjusting seat and to slide in a direction of the adjusting rail by a driving operation of the adjusting driving mechanism, an adjusting plate adapted to a circumferential diameter of the metering tube, a sensing member configured to sense positions of the adjusting plate and the metering mechanism, and an adjusting driving mechanism, the sensing member being disposed on the adjusting plate and the metering rod, respectively; specifically, the metering member and the adjusting member are used in cooperation for detecting or measuring the rubber particles and the asphalt, in this embodiment, the metering member and the adjusting member are both disposed in the metering pipe and are used for measuring the substance stored in the metering pipe, meanwhile, the adjusting member and the metering member are used in cooperation with each other, and after the metering member detects the current usage amount, the excess rubber powder or the asphalt is removed by the adjusting member; a passing hole and a plugging unit are arranged on a plate body of the adjusting plate, and the passing hole is used for passing the rubber particles or the asphalt; the adjusting member comprises an adjusting seat, an adjusting track and an adjusting driving mechanism, the adjusting plate is hinged with the adjusting seat and is used for realizing the metering operation of the metered objects under the driving operation of the adjusting driving mechanism, and the metered objects comprise rubber particles and asphalt; the adjusting drive mechanism is configured to adjust an angle of the adjusting plate and to cause the rubber pellets or the asphalt to be poured toward the circulation pipe;
in the using state, the passing hole is in an open state, so that the rubber particles and the asphalt can pass through, and after the metering component sends a metering signal, the blocking unit can block the passing hole, so that the accuracy of the metering operation is ensured; in the present embodiment, the plugging unit includes the plugging plate and a plugging driving mechanism configured to drive the plugging plate so that the plugging plate performs a plugging operation on the passing hole; in this embodiment, the blanking plate is fitted to the through hole; in the embodiment, through the matching use between the adjusting member and the circulating mechanism, the redundant rubber particles or asphalt can be transported through the circulating device; in this embodiment, the circulation mechanism includes a circulation passage and a transport member configured to be disposed in the circulation passage, both ends of the circulation passage being connected to the mixing device and the adjusting device, respectively; the transportation member comprises a poking plate, a transportation rail and a transportation driving mechanism, wherein the poking plate is configured to be in driving connection with the transportation driving mechanism to form a transportation part, and the transportation part is configured to slide along the orientation of the transportation rail; the conveying track is arranged along the length direction of the circulating channel; the poking plate pokes the objects in the circulating track so that the conveying component can convey the rubber particles and the asphalt; in this embodiment, the poking plate slides along the transportation track, and the operation of transporting the rubber particles and the asphalt stored in the transportation track is realized under the action of the poking plate; in this embodiment, the striking plate is disposed at an end close to the regulating member, and is disposed at an initial position; when the poking plate is poked for one time, the poking plate returns to the initial position and waits for the next poking operation;
the heating device comprises a heating cavity, a temperature detection piece and a turnover mechanism, wherein the turnover mechanism is configured to be arranged in the heating cavity, and the temperature detection piece is configured to detect the temperature of the heating cavity; the turnover mechanism comprises a turnover rod and a turnover driving mechanism, one end of the turnover rod is in driving connection with the turnover driving mechanism, the other end of the turnover rod vertically extends towards one side far away from the turnover driving mechanism, and the temperature detection piece is arranged at the end part of one end, in contact with the asphalt, of the turnover rod; specifically, the heating device is used for the operation of mixing the rubber powder and the asphalt and the operation of heating the mixed modified asphalt product based on the purpose of the asphalt to be performed; the rubber particles and the asphalt are mixed in the heating cavity, and meanwhile, the temperature in the heating cavity is detected by the temperature detection piece; in this embodiment, the heating device further includes a heating pipe configured to adjust the temperature in the heating chamber, so that the heating chamber can be heated and the heating operation of the rubber particles and the asphalt is realized under the action of the temperature; in this embodiment, a feedback system is formed among the heating chamber, the heating pipe, the temperature detector and the processor, when the temperature detector detects that the temperature in the heating chamber does not conform to the set temperature, the processor will increase or decrease the heating power of the heating pipe, so that the heating element can adjust the temperature value of the heating chamber, and at the same time, the temperature detector will detect the temperature value of the heating chamber in real time and feed back the temperature value to the processor, and the processor performs a dynamic adjustment operation on the heating chamber; in this embodiment, the turnover mechanism disposed in the heating chamber is used to adjust the positions of the rubber particles and the asphalt stored in the heating chamber, so that the temperature values at the respective positions can be detected to achieve the effect of uniform temperature; meanwhile, the temperature detection piece can also be arranged on the end part of one side of the turnover rod far away from the turnover driving mechanism,
the temperature value can be accurately detected;
the early warning device comprises an early warning unit and a regulation and control unit, the early warning unit is configured to collect parameters of a processing process and trigger an early warning signal according to an early warning strategy based on the collected parameters, and the regulation and control unit is configured to regulate the parameters of the heating device, the mixing device, the regulating device and the screening device based on the early warning signal; specifically, the early warning device is used for early warning that the heating device, the mixing device and the adjusting device can be adjusted, so that the produced modified asphalt can meet the requirements; in addition, the control unit is configured to adjust parameters of the heating device, the adjusting device and the screening device, so that a mixing ratio of the rubber particles and the asphalt or a size of particles of the rubber particles, or processing temperatures of the rubber particles and the asphalt are adjusted; in this embodiment, the early warning device further includes a detection mechanism, where the detection mechanism is configured to detect modified asphalt, and is configured to detect a property of the asphalt and a tolerance level of the asphalt, and send out an early warning or regulation instruction, and feed back parameters of the heating device, the mixing device, and the adjustment device, and implement dynamic adjustment, so as to ensure that the modified asphalt can be uniformly mixed, has good stability, and can improve storage stability, thereby achieving an optimal use state; the detection mechanism comprises a detection probe and a detection plate, and the detection probe is configured to be arranged right above the detection plate and used for detecting the modified asphalt; in this embodiment, a product heated by the heating device is flatly laid on the detection plate, and the detection probe detects the modified asphalt on the detection plate, so as to ensure that the performance of the modified asphalt is collected by the detection probe; and the dynamic detection effect of the regulating unit element is achieved.
Example three: the present embodiment should be understood to include at least all the features of any one of the foregoing embodiments and further improve on the same, and in particular, provide a method and an apparatus for preparing asphalt modified with waste rubber powder for roads, the apparatus includes a screening device, a mixing device, an adjusting device, a heating device, an early warning device and a processor, the screening device is configured to screen the rubber powder, the mixing device is configured to mix the rubber particles and asphalt, and the adjusting device is configured to dynamically adjust the mixing ratio of the rubber particles and asphalt; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust the proportion of the adjustment device based on detected data; specifically, the screening device and the mixing device are matched for use, so that the property of the asphalt can be accurately determined after the operations of screening and mixing the rubber powder and the asphalt piece are performed; in this embodiment, the adjusting device and the heating device are used in a matching manner, so that the heating device and the early warning device are used in a matching manner, and the detection device is dynamically adjusted and operated by regulating and controlling the devices if the finished products between the asphalts are detected by the early warning device and do not meet the set requirements or the finished products, thereby effectively ensuring that the whole asphalt preparation process can be efficiently unfolded; the processor is respectively in control connection with the screening device, the mixing device, the adjusting device, the heating device and the early warning device, and is used for performing centralized control on all the devices under the control of the processor and ensuring that the asphalt preparation or modification can be effectively developed; in this embodiment, the preparation equipment further comprises a shearing device, wherein the shearing device is configured to cut or shear rubber, so that the rubber can be changed into rubber powder, and the rubber powder is used for preparing rubber asphalt and applied to a bonding layer pavement project, so that the use performance of the bonding layer can be improved, resources can be saved, and the environment can be protected;
the rubber asphalt can be used as a cementing material for various road surfaces, and can obviously reduce traffic noise by 5-8 dB; the aging of the asphalt adhesive layer is slowed down, and the service life is prolonged; the adhesive force is strong, the wear resistance and the water stripping resistance are greatly improved; the tear resistance of the pavement in winter and the melting deformation resistance of the pavement in summer are improved; the adhesiveness of the modified asphalt and the acidic stone is improved;
the early warning device comprises an early warning unit and a regulation and control unit, the early warning unit is configured to collect parameters of a processing process and trigger an early warning signal according to an early warning strategy based on the collected parameters, and the regulation and control unit is configured to regulate the parameters of the heating device, the mixing device, the regulating device and the screening device based on the early warning signal; specifically, the early warning device is used for early warning that the heating device, the mixing device and the adjusting device can be adjusted, so that the produced modified asphalt can meet the requirements; in addition, the control unit is configured to adjust parameters of the heating device, the adjusting device and the screening device, so that a mixing ratio of the rubber particles and the asphalt or a size of particles of the rubber particles, or processing temperatures of the rubber particles and the asphalt are adjusted; in this embodiment, the early warning device further includes a detection mechanism, where the detection mechanism is configured to detect modified asphalt, and is configured to detect a property of the asphalt and a tolerance level of the asphalt, and send out an early warning or regulation instruction, and feed back parameters of the heating device, the mixing device, and the adjustment device, and implement dynamic adjustment, so as to ensure that the modified asphalt can be uniformly mixed, has good stability, and can improve storage stability, thereby achieving an optimal use state; the detection mechanism comprises a detection probe and a detection plate, and the detection probe is configured to be arranged right above the detection plate and used for detecting the modified asphalt; in this embodiment, a product heated by the heating device is flatly laid on the detection plate, and the detection probe detects the modified asphalt on the detection plate, so as to ensure that the performance of the modified asphalt is collected by the detection probe; and the dynamic detection effect of the regulating unit element is achieved; the detection mechanism comprises a tiling component and a sliding unit, wherein the sliding unit is configured to slide the tiling component so that the tiling unit can perform a tiling operation on finished modified asphalt, so that the property of the asphalt can be detected; the slide unit includes a slide rail and a slide drive mechanism configured to be drivingly connected to the tiling member and to perform a sliding operation along an orientation of the slide rail; in this embodiment, the paving member includes a paving plate, a supply tank, and a thickness detector, the supply tank is configured to store the modified asphalt, the supply tank is configured to be disposed on the paving plate, the paving plate is configured to be disposed above the detection plate so that the modified asphalt can be paved above the detection plate, the thickness detector can also detect the paved modified asphalt, and the thickness of the paving member can be detected during paving the asphalt; simultaneously, detecting the asphalt through the detection probe; in addition, in the process that the asphalt is tiled by the tiling component, the thickness detection piece can dynamically detect the tiling component so as to ensure that the property or parameter of the modified asphalt can be captured by the detection probe;
the detection mechanism further comprises a detection algorithm, wherein the detection algorithm is used for detecting the modified asphalt and collecting the modified asphalt spread on the detection plate; arbitrarily taking any starting point and end point position parameters collected by the detection probe and substituting the parameters into the following formula to distinguish the original image data S received by the detection probe,
the distinguishing characteristic of the image is distinguished from the surrounding interference characteristic, and the pixel value of the detection characteristic can be detected through the formula; in the formula (1), u is an initial reference point, L is a terminal point, u belongs to S, L belongs to S, and a function Sgn is a symbolic function and is used for judging a sampling point of image data and filtering miscellaneous points; y isi(u) is a function of image dissimilarity,
wherein (x)i，yi) Coordinates of the end point of the abnormal image are obtained;
by detecting image data of a probe, extracting or analyzing image features, acquiring m x n image data from the probe,
if f (x, y) is the pixel value at the (x, y) position in the image, and the number of gray scale levels is p, the image W (x, y) of the pixel is adjusted according to the following formula (2),
wherein, KgIs the number of grey levels, dminIs a minimal imagePrime point, dmaxIs the largest pixel.
Example four: the present embodiment should be understood to include at least all the features of any one of the foregoing embodiments, and further improvements are made thereon, and specifically, to provide a waste rubber powder modified asphalt for roads and a preparation method thereof, wherein the base asphalt with a temperature lower than 170 ℃ is heated to about 190 ℃ to 210 ℃ by a rapid heating device; metering the matrix asphalt by an asphalt flowmeter, and adding the matrix asphalt into a mixing device; the rubber powder is weighed by a weighing device and then is simultaneously conveyed to a mixing device in proportion; stirring and shearing the rubber scraps and the matrix asphalt at a high speed in a mixing device, and uniformly mixing; the uniformly stirred mixture is circularly input into a mixing device through a special rubber asphalt pump; the mixture is stirred in a mixing device, is kept at the temperature of 190-210 ℃ and is swelled for about 2-6 hours, and the processing time can be adjusted according to the actual application or the time can be adjusted according to the production capacity; and (4) filling the qualified rubber asphalt binder into a finished product storage tank or transporting the finished product to a road hardening site through a transport vehicle.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
In summary, according to the waste rubber powder modified asphalt for roads and the preparation method and equipment thereof, the shearing device is adopted to cut or shear the rubber, so that the rubber can be changed into rubber powder, the rubber powder is used for preparing the rubber asphalt and is applied to the adhesive layer pavement engineering, the adhesive layer service performance can be improved, the resources can be saved, and the environment can be protected; the early warning device is adopted to send out an early warning or regulating instruction, the parameters of the heating device, the mixing device and the adjusting device are fed back, dynamic adjustment is realized, the modified asphalt can be uniformly mixed, the stability is good, the storage stability can be improved, and the optimal use state is achieved; an operation for mixing rubber powder and asphalt by using the heating device and an operation for heating the mixed modified asphalt product based on the purpose of the asphalt to be performed; through the matching use between the adjusting component and the circulating mechanism, redundant rubber particles or asphalt can be transported through the circulating device; the rubber granules can be thinner under the further shearing operation of the shearing component arranged in the shearing cavity by adopting the spacing component which is configured to the shearing cavity and the mixing cavity; the angle of the first and second screening nets is adjusted by the offset member so that the filtering operation of the rubber particles can be adjusted according to actual needs, for ensuring that the rubber particles can be screened out.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (7)
1. A waste rubber powder modified asphalt for a road, comprising a coupling agent, a color former and a reinforcing agent, the coupling agent being configured to increase wear resistance of a tire; the color former is configured to provide stiffness to the tire; the reinforcing agent is configured to interact with the reinforcement of the rubber of the tire with the carbon black.
2. The waste rubber powder modified asphalt for roads of claim 1, wherein the coupling agent comprises a cis-1, 4-polybutadiene product in an organic solvent solution polymerization reaction of 1, 3-butadiene monomer, and a catalyst is added to the coupling agent, wherein the catalyst comprises at least one of neodymium neodecanoate, neodymium octanoate and neodymium vaseline acid.
3. The asphalt modified with waste rubber powder for road use according to claim 1, wherein said color-former comprises 1, 4-polybutadiene elastomer, polyvinylidene elastomer, rubber-reinforced carbon black and precipitated silica and specified silica coupling agent, wherein the polyvinylidene elastomer comprises at least one of cis-1, 4-polyisoprene, styrene/butadiene, isoprene/butadiene and 3, 4-polyisoprene elastomer.
4. The waste rubber powder modified asphalt for roads of claim 1, wherein the reinforcing agent comprises 30 to 90phr of the rubber reinforcing carbon black and 10 to 70phr of the precipitated silica, and wherein a master batch for making a tire may contain 100phr of the rubber reinforcing carbon back.
5. The waste rubber powder-modified asphalt for roads as claimed in claim 1, wherein the 1, 4-polybutadiene has a microstructure consisting of 90% to 99% of cis-1, 4-isomer units and a number average molecular weight in the range of 90,000 to 180,000 and a heterogeneity index (Mw/Mn) in the range of 2.5/1 to 5/1.
6. The waste rubber powder-modified asphalt for roads of claim 1, wherein the catalyst is in the presence of a catalyst consisting of a neodymium compound, optionally together with an alkylaluminum compound and an aluminum chloride transfer compound.
7. An apparatus for producing waste rubber powder-modified asphalt for roads using the waste rubber powder-modified asphalt for roads according to any one of claims 1 to 6, comprising a screening device configured to screen the rubber powder, a mixing device configured to mix the rubber pellets and asphalt, an adjusting device configured to dynamically adjust a mixing ratio of the rubber pellets and asphalt, a heating device, a warning device, and a processor; the heating device is configured to heat the mixed rubber crumb and asphalt; the early warning device is configured to detect a finished asphalt product and adjust a ratio of the adjustment device based on detected data.
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| CN202011624652.4A CN112778776A (en) | 2020-12-30 | 2020-12-30 | Waste rubber powder modified asphalt for roads and preparation method and equipment thereof |
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Application publication date: 20210511 |