CN104693820A - Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof - Google Patents
Composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a composite-waste-rubber-powder-particle modified asphalt mixture capable of being stored stably and a preparation method thereof. The preparation method comprises the steps of firstly carrying out deep-desulfurization degradation on low-mesh rubber powder so as to prepare high-desulfurization-degree reclaimed rubber, then, mixing high-mesh rubber powder, the high-desulfurization-degree reclaimed rubber and a small amount of cross-linking agent according to a certain ratio so as to prepare composite waste-rubber-powder particles, then, mixing the composite waste-rubber-powder particles and matrix asphalt, so as to prepare modified asphalt, and mixing the modified asphalt and aggregate, thereby preparing the modified asphalt mixture. According to the composite waste-rubber-powder particles, linear macromolecules in the high-desulfurization-degree reclaimed rubber are uniformly attached to the surface of the rubber powder, and meanwhile, a linear macromolecule-cross-linked structured core-shell structure is formed by using the micro-crosslinking action of the cross-linking agent. Due to the structure, a large number of linear molecules can intermesh in asphalt, and then, a stable rubber powder-asphalt mesh structure is formed, so that the aim of preparing the stably-stored rubber powder modified asphalt mixture is achieved.
Description
Technical field
The present invention relates to particle modified asphalt of a kind of compound shoddy and preparation method thereof, belong to the recycling field of waste rubber.
Background technology
Polymer modified asphalt and polymer modified asphalt compound, because of the high temperature performance of its excellence, be generally acknowledged excellent ground surface material, and waste rubber powder modified asphalt are the focuses of research in recent years.Domestic and international rubber powder modified asphalt compound laying highway has history for many years.Especially the Successful Practice of the U.S. shows: waste Crumb rubber modified asphalt road surface half more thinning than unfilled bitumen road surface, and its work-ing life doubles, it can improve heat-resisting, the winter hardiness on road surface, and can reduce noise, anti-wet and slippery, trash ice snow, improve safety coefficient, especially cheap.Adding of shoddy can strengthen toughness, and the oily wax in the effective adsorptive pitch of energy, reduce the content of free wax, the temperature sensibility of pitch is declined, cohesiveness improves.With waste rubber powder modified asphalt not only low price, and some performance is better than SBS modifying asphalt.
In recent years, China also had carried out some research work to rubber powder modified asphalt.However; domestic test work shows; it is seriously aging to there is rubber powder in modifying process in rubber powder modified asphalt; rubber powder not easily disperses; the poor fluidity that modifying asphalt high temperature viscosity is large and cause; in storage process rubber powder easily and pitch due to interface cohesion not good and cause the subject matter such as rubber powder and pitch laminated segregation; although domestic waste rubber powder modified asphalt has small-scale application; but because these problems are difficult to solve; even to this day, do not have plantmix's rubber powder modified asphalt of large-scale to produce to emerge.
Rubber powder modified asphalt thermmal storage instability is mainly manifested in:
(1) rubber powder causes rubber powder and pitch laminated segregation with asphalt interface in conjunction with bad
(2) rubber powder modified asphalt heat deposits the decay causing the indices such as the softening temperature of modifying asphalt in process due to the continuation degraded of rubber powder.
At present, further research has also been carried out in the improvement both at home and abroad for rubber powder modified asphalt performance, but still there is various problem.CN101805524 discloses a kind of waste Crumb rubber modified asphalt preparation method of high-temperature storage property.First the method utilizes the blended effect of twin screw to make a certain proportion of plastic waste (PE) and rubber powder blending extrusion rubber plastic blend particle under 100-180 DEG C of condition, then a certain proportion of rubber powder and above-mentioned rubber plastic blend particle doped matrix pitch is prepared modifying asphalt.The plastic waste containing higher proportion of the method rubber plastic blend particle, although with the addition of a small amount of compatilizer, but due to the low temperature brittleness of PE and incompatible with the extreme of pitch, can directly affect the low-temperature ductility of modifying asphalt and then affect the low-temperature performance of asphalt.CN103146206A discloses a kind of preparation method of composite modified asphalt of stable storing.The method first utilizes the blended effect of twin screw by a certain proportion of SBS and rubber powder compound is blended prepares SBS/ rubber powder particle, then a certain proportion of SBS and SBS rubber powder composite particles doped matrix pitch is prepared modifying asphalt.The SBS mixing part in the method process can directly cause the cost of modifying asphalt to increase, simultaneously, composite S BS and rubber powder under the high temperature of 180-300 DEG C, Strong shear condition, directly can cause the degraded of SBS, directly affects this part SBS effect in modifying asphalt.CN101824226A discloses a kind of preparation method of appts of modified asphalt by utilizing waste tyre rubber powder of steady heat storage.First the method utilizes the aqueous solution of silane coupling agent to apply rubber powder, then carries out asphalt modification to the rubber powder after coating.The method utilizes the aqueous solution to apply rubber powder, a large amount of aqueous solution can remain between rubber powder, these moisture rapidly evaporation can form a large amount of steam when modifying asphalt, cause the pitch tank that overflows and form industrial accident, and expensive silane coupling agent can direct lifting modifying asphalt cost simultaneously.
Summary of the invention
The object of the invention is to the deficiency overcoming the problems referred to above, propose a kind of can the modified asphalt mixture of compound shoddy particle that stores of dispersed in pitch, high-temperature stable and preparation method thereof.Present method technological process is simple, and environmental protection, not only can consume waste rubber in a large number, and eliminate the secondary pollution in waste rubber recycling process, can realize modifying asphalt continuous prodution simultaneously, modified asphalt mixture property indices is excellent, and high-temperature storage is stablized.
Technical solution of the present invention is as follows:
A preparation method for the particle modified asphalt of compound shoddy that Absorbable organic halogens stores, is characterized in that comprising the steps:
(1) be the low mesh number rubber powder of 100:3-20:0.3-4 by mass ratio, softening oil, activator join the first rank screw extrusion press in homogenizer after pre-treatment, material pressure, at 2-20MPa, extrudes high desulfurization degree regenerated rubber from mouth mould after reaction 5-20min continuously;
(2) described high desulfurization degree regenerated rubber is added second-order screw extrusion press, add high order number rubber powder and linking agent again, wherein the mass ratio of high order number rubber powder, high desulfurization degree regenerated rubber, linking agent is 20-50:50-80:0.1-0.6, barrel pressure 2-20MPa, extrude, preparation compound shoddy powder; Wherein said low mesh number rubber powder is 5-30 order, and high order number rubber powder is 40-200 order;
(3) matrix pitch is heated to 160-200 DEG C, stir and add the described compound shoddy particle heat-insulating premix 5-100 minute that the mass percent accounting for matrix pitch is 20-50%, utilize colloidal mill to shear subsequently, grind 10-50min, adding the mass percent accounting for matrix pitch in process is the stablizer of 0.1-3%; Grow 60-300 minute with 100-500 rev/min of rapid stirring insulation, prepare modifying asphalt;
(4) described modifying asphalt is joined gather materials in obtained modified asphalt mixture, described in gather materials and the bitumen aggregate ratio of modifying asphalt is 5.3-5.7.
Screw extrusion press is twin screw extruder or single screw extrusion machine.
Preferably described first rank screw extrusion press is equidirectional parallel double-screw extruder, length-to-diameter ratio 20-60, screw diameter 30-120, controls the different zone temperatures of twin screw at 100-380 DEG C, controls screw speed at 10rpm-300rpm; Described second-order screw extrusion press is single screw extrusion machine, length-to-diameter ratio 15-40, screw diameter 50-120, controls barrel zone temperature at 80-200 DEG C, screw speed 10-200rpm.
Described pre-treatment preferably stirs 10-30min at 50-100 DEG C.
Described rubber powder is preferably one or more in damaged tire, useless hand cart tyre, useless conveying belt, scrap rubber footwear.
Described softening oil is preferably one or more in Stockholm tar, naphthenic oil, Yatall MA, aromatic hydrocarbon oil, rosin.
Described activator is preferably one or more in phenyl disulfide, thiophenol, polyalkylbenzene phenol disulphide, octadecylamine.
The sol content of preferred described high desulfurization degree regenerated rubber is greater than 80%, and mooney viscosity is less than 1, and Sol molecular weight is greater than 10,000, and gel cross-linkage density is lower than 5 × 10
-5, polydispersity coefficient PDI is greater than 5.
Described linking agent is preferably one or more in SULPHUR POWDER, short M, TMTD, metal oxide.
According to the particle modified asphalt of compound shoddy prepared by above-described preparation method.
Beneficial effect:
The present invention proposes the high temperature, the Strong shear effect that utilize twin screw extruder and first deep desulfuration degraded is carried out to the rubber powder of low mesh number, prepare high desulfurization degree reclaimed rubber, and then utilizing the low temperature of single screw extrusion machine, blended effect admixture height order number rubber powder and high desulfurization degree reclaimed rubber and a small amount of linking agent according to a certain percentage, preparation compound shoddy particle also obtains modified asphalt mixture further.This compound shoddy particle, the linear macromolecule in high desulfurization degree reclaimed rubber is evenly wrapped up in and is invested vulcanized rubber powder, utilizes micro-crosslinked action of linking agent simultaneously, forms " nucleocapsid " structure of a kind of linear macromolecule-crosslinking structure.A large amount of linear molecules in this structure mutually can tangle in pitch, then form stable rubber powder-pitch reticulated structure, reach the object of the rubber powder modified asphalt compound of preparation stable storage.Specific as follows:
(1) utilize twin screw extruder to prepare high desulfurization degree regenerated rubber, effectively can control the waste water, waste gas etc. " secondary pollution " that produce in traditional waste rubber recycling process, the waste rubber environment-friendly type regeneration belonged to truly utilizes;
(2) the dispersed of single screw extrusion machine is utilized, high desulfurization degree reclaimed rubber can be wrapped up in and is attached to rubber powder particle surface by physics uniformly, utilize the micro-crosslinked of linking agent simultaneously, high desulfurization degree reclaimed rubber and rubber powder particle is impelled to form micro-chemically crosslinked, then stable " nucleocapsid " structure is formed, this " nucleocapsid " structure is mutually tangled in pitch, forms stable reticulated structure, reaches the object improving rubber powder modified asphalt storage stability;
(3) high desulfurization degree regenerated rubber, linear molecule content high (higher than 80%), molecular-weight average large (being greater than 10,000), polydispersity coefficient large (PDI > 5), gel cross-linkage density is little.Because PDI is large, small-molecular-weight colloidal sol is wherein similar with fragrant part of matrix pitch, can supplement the fragrant part disappearance caused because rubber powder particle is swelling, improve the high temperature viscosity of modifying asphalt, be convenient to modifying asphalt and produce, transport and mix when modifying asphalt;
(4) high desulfurization degree regenerated rubber, it is apparent very glutinous, and mooney viscosity is very low, is not easy to store, transport, and after adding the mixing of common rubber powder, granulation, can solve a this difficult problem, be convenient to the packaging of high desulfurization degree reclaimed rubber, storage and transport.
Embodiment
In order to more clearly understand content of the present invention, will be illustrated in further detail by specific embodiment.
Below by the comparative example 1,2 by only using General Purpose Rubber powder, carry out with the rubber powder particle prepared according to the inventive method the embodiment 1-11 that modification obtains modified asphalt mixture to contrast, the performance difference using the particle modified asphalt of rubber powder of the present invention and common rubber powder modified asphalt compound is shown.
Stablizer in following examples adopts the one package stabilizer of SULPHUR POWDER, zinc oxide, stearic acid, TMTD, its mass ratio is: SULPHUR POWDER 80wt%, zinc oxide 5wt%, stearic acid 10wt%, TMTD5wt%, stablizer also can be the mixture of one or more in SULPHUR POWDER, sulfocompound.Linking agent adopts SULPHUR POWDER.
Rubber powder prepared by following examples camber desulfurization regeneration glue is 5 object full tire meridian glue rubber powder, also can be car tire, hand cart tyre, conveying belt rubber powder.
In following examples, the high order number rubber powder of modifying asphalt is 40 object full tire meridian glue rubber powder, also can be car tire, hand cart tyre, conveying belt rubber powder.
The softening oil of following examples camber desulfurization regeneration glue is environment-friendly type Stockholm tar, also can be the one in Yatall MA, naphthenic oil, rosin, aromatic hydrocarbon oil.
The activator of following examples camber desulfurization regeneration glue is 420, also can be 450,480 or Diphenyl disulfide, thiophenol, one or more mixtures in octadecylamine.
In following examples, by rubber powder, softening oil, activator according to weight ratio in homogenizer at about 80 DEG C pre-treatment about 20min, be metered into the first rank twin screw extruder, control the different zone temperatures of twin screw at 100-380 DEG C.Wherein, first paragraph: 150-200 DEG C, second segment: 250-300 DEG C; 3rd section: 300-350 DEG C; 4th section: 300-350 DEG C; 5th section: 150-200 DEG C.Control screw speed at 20-70rpm.Height desulfurization regeneration glue is extruded continuously from mouth mould after reaction 5-20min.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor.Be metered into the uniform mixture of high order number rubber powder and linking agent simultaneously by hopper, control extruder cylinder of single screw extruder temperature at 100-150 DEG C; Control screw speed 30-100rpm.After evenly extruding, through water-cooled preparation compound shoddy particle.
Comparative example 1:
20%40 order rubber powders are taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Comparative example 2:
25%40 order rubber powders are taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 1:
By 5 order rubber powders, softening oil, activator according to weight ratio be 100:5:2 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 80:20:0.1 adds 40 order rubber powders according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 2:
By rubber powder, softening oil, activator according to weight ratio be 100:10:1 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 70:30:0.3 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 3:
By rubber powder, softening oil, activator according to weight ratio be 100:15:3 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 60:40:0.5 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30.2% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 4:
By rubber powder, softening oil, activator according to weight ratio be 100:5:1 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 60:40:0.6 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 5:
By rubber powder, softening oil, activator according to weight ratio be 100:5:3 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 80:20:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 6:
By rubber powder, softening oil, activator according to weight ratio be 100:18:0.5 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 75:25:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.35.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 7:
By rubber powder, softening oil, activator according to weight ratio be 100:3:4 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 70:30:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.40.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 8:
By rubber powder, softening oil, activator according to weight ratio be 100:20:0.3 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 65:35:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.40.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 9:
By rubber powder, softening oil, activator according to weight ratio be 100:5:2 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 60:40:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.35.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 10:
By rubber powder, softening oil, activator according to weight ratio be 100:5:2 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 55:45:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.30.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Embodiment 11:
By rubber powder, softening oil, activator according to weight ratio be 100:5:2 in homogenizer at 70 DEG C of pre-treatment 15min, be metered into the first rank twin screw extruder, through shear, reaction after from die extrusion height desulfurization regeneration glue.Subsequently, height desulfurization regeneration glue is metered into second-order single screw extrusion machine by junctor, adjust hopper feed speed is that 50:50:0.2 adds 40 order rubber powder and linking agents according to height desulfurization regeneration glue, 40 order rubber powders, linking agent weight ratio simultaneously, Homogeneous phase mixing, to extrude, through water-cooled preparation composite glue powder particle.25.1% composite glue powder particle is taken by matrix pitch weight ratio, join rapid stirring 15min in matrix pitch, stir the stablizer adding 0.4% subsequently, colloidal mill is utilized to grind 1 time (10min), and 4 hours are bred at 170-175 DEG C, obtained modifying asphalt also tests performance of modified bitumen.
Table 1 high desulfurization degree reclaimed rubber physicals
Table 2 performance of modified bitumen
Join in asphalt by modified asphalt material in embodiment, by Marshall experiment, high-temperature stability experiment, water stability experiment, crack resistance at low-temperature experiment, experimental result is as shown in table 3:
Table 3
Table 1 and table 2 can be found out, the hot storage stability of high desulfurization degree reclaimed rubber and rubber powder composite particles modifying asphalt obviously will be better than the hot storage stability of common rubber powder modified asphalt, simultaneously, every modifying asphalt index of composite glue powder particle of the present invention is better than or is not worse than common rubber powder modified asphalt and volume greatly can promote and not affect high temperature viscosity, is convenient to production and construction and prepares compound further.There is impact to the hot storage stability of rubber powder composite particles in the linking agent of different addition quantity, too high or too low linking agent directly can affect hot storage stability and the modifying asphalt high temperature performance of modifying asphalt.In addition, the reclaimed rubber composite glue powder particle of different desulfurization degree is to the high temperature performance of modifying asphalt, particularly remarkable on the impact of modifying asphalt high temperature viscosity and hot storage stability.The indices of ratio on modifying asphalt of the high desulfurization degree reclaimed rubber in composite glue powder particle has the impact of highly significant, and the impact of softening temperature, low-temperature ductility and hot storage stability is particularly remarkable.More high and low temperature ductility is better for the ratio of the high desulfurization degree reclaimed rubber in composite glue powder particle, and hot storage stability also improves thereupon.But, cross the convenience that a high proportion of height desulfurization regeneration glue can affect the packaging of rubber powder composite particles, storage and transport.In a word, in the framework of the present definition, each performance can obtain a comprehensive raising, thus ensures that the performance of modified asphalt mixture also can get a promotion.
Table 3 can be found out, compared with common waste rubber powder modified asphalt compound (comparative example 1,2), the bitumen aggregate ratio of asphalt prepared by the present invention maintains an equal level substantially with it, possesses good economy.Meanwhile, compared with common waste rubber powder modified asphalt compound (comparative example 1,2), the water stability of asphalt prepared by the present invention is more excellent, and high temperature resistance rutting resistance and cold cracking property index also more excellent.
The particle modified asphalt of composite glue powder of the present invention well solves the not good problem of the hot storage stability of simple rubber powder modified asphalt compound, the obvious entirety of properties performance index of its modified asphalt mixture is better than common rubber powder modified asphalt, also solves the packaging of height desulfurization regeneration glue, storage, a transport difficult problem.
The above is only the preferred embodiment of the present invention, adopts aforesaid preferred processing condition, mass ratio and different additive component to carry out organizing test more, all can obtain the result of above-mentioned improvement.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a preparation method for the particle modified asphalt of compound shoddy of Absorbable organic halogens storage, is characterized in that comprising the steps:
(1) be the low mesh number rubber powder of 100:3-20:0.3-4 by mass ratio, softening oil, activator join the first rank screw extrusion press in homogenizer after pre-treatment, material pressure, at 2-20MPa, extrudes high desulfurization degree regenerated rubber from mouth mould after reaction 5-20min continuously;
(2) described high desulfurization degree regenerated rubber is added second-order screw extrusion press, add high order number rubber powder and linking agent again, wherein the mass ratio of high order number rubber powder, high desulfurization degree regenerated rubber, linking agent is 20-50:50-80:0.1-0.6, barrel pressure 2-20MPa, extrudes, preparation compound shoddy particle; Wherein said low mesh number rubber powder is 5-30 order, and high order number rubber powder is 40-200 order;
(3) matrix pitch is heated to 160-200 DEG C, stir and add the described compound shoddy particle heat-insulating premix 5-100 minute that the mass percent accounting for matrix pitch is 20-50%, utilize colloidal mill to shear subsequently, grind 10-50min, adding the mass percent accounting for matrix pitch in process is the stablizer of 0.1-3%; Grow 60-300 minute with 100-500 rev/min of rapid stirring insulation, prepare modifying asphalt;
(4) described modifying asphalt is joined gather materials in obtained modified asphalt mixture, described in gather materials and the bitumen aggregate ratio of modifying asphalt is 5.3-5.7.
2. preparation method according to claim 1, is characterized in that screw extrusion press is twin screw extruder or single screw extrusion machine.
3. preparation method according to claim 2, it is characterized in that described first rank screw extrusion press is equidirectional parallel double-screw extruder, length-to-diameter ratio 20-60, screw diameter 30-120, control the different zone temperatures of twin screw at 100-380 DEG C, control screw speed at 10rpm-300rpm; Described second-order screw extrusion press is single screw extrusion machine, length-to-diameter ratio 15-40, screw diameter 50-120, controls barrel zone temperature at 80-200 DEG C, screw speed 10-200rpm.
4. preparation method according to claim 2, is characterized in that described pre-treatment for stir 10-30min at 50-100 DEG C.
5. preparation method according to claim 1, is characterized in that described rubber powder is one or more in damaged tire, useless hand cart tyre, useless conveying belt, scrap rubber footwear.
6. preparation method according to claim 1, is characterized in that described softening oil is one or more in Stockholm tar, naphthenic oil, Yatall MA, aromatic hydrocarbon oil, rosin.
7. preparation method according to claim 1, is characterized in that described activator is one or more in phenyl disulfide, thiophenol, polyalkylbenzene phenol disulphide, octadecylamine.
8. preparation method according to claim 1, it is characterized in that the sol content of described high desulfurization degree regenerated rubber is greater than 80%, mooney viscosity is less than 1, and Sol molecular weight is greater than 10,000, and gel cross-linkage density is lower than 5 × 10
-5, polydispersity coefficient PDI is greater than 5.
9. preparation method according to claim 1, is characterized in that described linking agent is one or more in SULPHUR POWDER, short M, TMTD, metal oxide.
10. according to the particle modified asphalt of compound shoddy prepared by the arbitrary described preparation method of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510075193.1A CN104693820B (en) | 2015-02-12 | 2015-02-12 | It is a kind of can stable storage the particle modified asphalt of compound shoddy and preparation method thereof |
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| CN201510075193.1A CN104693820B (en) | 2015-02-12 | 2015-02-12 | It is a kind of can stable storage the particle modified asphalt of compound shoddy and preparation method thereof |
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| CN104693820A true CN104693820A (en) | 2015-06-10 |
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| CN109053033A (en) * | 2018-06-20 | 2018-12-21 | 河南城建学院 | Waste and old reclaimed rubber sole powder composite waste clothing regenerated fiber enhancing asphalt and preparation method thereof |
| CN110343304A (en) * | 2018-04-02 | 2019-10-18 | 北京路德永泰环保科技有限公司 | Using the method for scrap rubber preparation rubber latex and by the rubber latex of this method preparation |
| CN111909529A (en) * | 2020-06-10 | 2020-11-10 | 北京克林泰尔环保科技有限公司 | Desulfurized waste tire rubber powder crosslinked modified asphalt and preparation method thereof |
| CN115746774A (en) * | 2022-11-19 | 2023-03-07 | 东南大学 | Normal-temperature fast-curing crack repairing agent, preparation method and application thereof |
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| CN104693820B (en) | 2018-08-24 |
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