CN111234544A - Smc normal-temperature asphalt modifier and preparation method thereof - Google Patents
Smc normal-temperature asphalt modifier and preparation method thereof Download PDFInfo
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- CN111234544A CN111234544A CN202010186212.9A CN202010186212A CN111234544A CN 111234544 A CN111234544 A CN 111234544A CN 202010186212 A CN202010186212 A CN 202010186212A CN 111234544 A CN111234544 A CN 111234544A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
- B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention belongs to the technical field of asphalt processing, and particularly relates to a smc normal-temperature asphalt modifier and a preparation method thereof; the material comprises the following raw materials in parts by weight: rubber oil: 40-55 parts; carbon black: 15-25 parts; modified epoxy resin: 16-26 parts; curing agent: 4-12 parts; rock wool fiber: 3-10 parts; the method comprises the following steps: s1, pretreatment of raw materials: s2: crushing raw materials: putting the cleaned rubber tire in the step S2 into a crushing box, wherein a cutting roller which is arranged above the crushing box in a rotating way in the same direction can cut the unfolded rubber tire into a strip-shaped structure to form a rubber tire strip; then, the rubber tire strip with the strip-shaped structure can be crushed by a differential speed and reverse rotation crushing roller arranged below the cutting roller, and the grinding plate can be bonded to form carbon black powder; the cutting roller is arranged on the crushing box to rotate in the same direction, so that the cutting knife on the cutting roller can conveniently cut the rubber tire up and down simultaneously; s3: extracting the gum oil: s4: and (4) mixing and preparing.
Description
Technical Field
The invention belongs to the technical field of asphalt processing, and particularly relates to a smc normal-temperature asphalt modifier and a preparation method thereof.
Background
The asphalt is a waterproof, moistureproof and anticorrosive high-viscosity organic material, is composed of hydrocarbons with different molecular weights and non-metallic derivatives thereof, and is mainly used for paving road surfaces and the like. The asphalt can be divided into hot-mix, warm-mix and cold-mix asphalt mixtures according to the mixing temperature. With the development of traffic construction in China, the asphalt pavement which is too heavy under heavy traffic pressure needs to be continuously renovated.
The chemical modifier for modifying asphalt is prepared with thermoplastic chemical components and rubber and plastic as supplementary material and through medium temperature lipolysis and high temperature polymerization.
Chinese patent also discloses an SMC normal temperature asphalt modifier, the application number is CN2018102742019, the modifier of the invention uses the following raw materials: SMC: 50-80 parts; epoxy resin: 30-65 parts of a binder; curing agent: 2-12 parts of a solvent; auxiliary agent: 0.5-5 parts; the modifier can be used as a normal-temperature asphalt modifier for asphalt mixing, the mixing temperature is reduced by 40-80 ℃, the safety and the environmental protection are realized, the construction temperature is reduced, and the construction flexibility is improved.
The invention patent only solves the problems that the conventional asphalt modifier does not have the effects of reducing the stirring and mixing temperature and the construction temperature after being used for stirring and mixing asphalt; however, when the asphalt modifier is mixed in asphalt and laid on the ground, the asphalt and the modifier contain a large amount of rubber and plastic, so that the asphalt is easy to age and reduce the high-temperature resistance when being used for a long time under the ultraviolet irradiation, and the service life of the asphalt is further influenced.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides the SMC normal temperature asphalt modifier and the preparation method thereof, and the invention is mainly used for solving the problems that the conventional asphalt modifier is not used for reducing the stirring and mixing temperature and the construction temperature after being used for stirring and mixing asphalt; however, when the asphalt modifier is mixed in asphalt and laid on the ground, the asphalt and the modifier contain a large amount of rubber and plastic, so that the asphalt is easy to age and reduce the high-temperature resistance when being used for a long time under the ultraviolet irradiation, and the service life of the asphalt is further influenced.
The technical scheme adopted by the invention to solve the technical problem is as follows: the invention relates to a smc normal-temperature asphalt modifier which comprises the following raw materials in parts by weight:
rubber oil: 40-55 parts;
carbon black: 15-25 parts;
modified epoxy resin: 16-26 parts;
curing agent: 4-12 parts;
rock wool fiber: 3-10 parts.
The carbon black has good dispersibility, particularly high-structure carbon black, and is prepared into slurry to be mixed into the rubber oil, so that the modifier can be effectively and fully dispersed into the asphalt raw material, and the construction convenience of the asphalt binder under the normal temperature condition is further improved; meanwhile, the modified epoxy resin is added into the modifier, so that the effects of strong acid and alkali resistance, corrosion resistance, high temperature resistance, high hardness and no deformation when the asphalt binder and the modifier are mixed and paved on the ground are further improved; simultaneously the cooperation of rock wool fibre and carbon black, the carbon black has certain light stability, light can make rubber plastics ageing, especially ultraviolet ray in the sunshine can accelerate rubber plastics's ageing, rock wool fibre can play good thermal-insulated effect of heat preservation, make smc normal atmospheric temperature pitch modifier not only can play the effect of construction to the pitch binder under normal atmospheric temperature, can play good high temperature resistant to pitch simultaneously, ultraviolet resistance's function, prevent because contain a large amount of rubber plastics in the pitch, after further improving pitch and constructing in normal atmospheric temperature environment, the life of pitch.
Preferably, the rubber oil is a product extracted from a waste steel ring-free rubber tire by a cracking reaction kettle; the carbon black is a waste product left by a cracking reaction kettle and a raw material extraction device; the rock wool fiber is a product extracted from waste rock wool products; the rubber oil and the carbon black are extracted from the waste rubber tire without the steel ring, so that the waste rubber tire can be fully utilized; meanwhile, the carbon black is a waste product lifted from the cracking reaction kettle and the raw material extraction device, so that the production cost of the raw material in the smc normal-temperature asphalt modifier is reduced, and the waste generated in the production of the raw material in the smc normal-temperature asphalt modifier can be recycled to the raw material, so that the production cost of the smc normal-temperature asphalt modifier is further reduced.
The invention relates to a preparation method of a smc normal temperature asphalt modifier, which is used for producing the smc normal temperature asphalt modifier and comprises the following steps:
s1, pretreatment of raw materials: firstly, putting the collected waste rubber tires without steel rings into a washing tank, and simultaneously unfolding the waste rubber tires through a flattening device; removing sundries, dust and metal adhered to the outer wall of the waste rubber tire in a rinsing and magnetic attraction mode; the waste rubber tire without the steel ring is adopted, so that the rubber tire is conveniently and rapidly crushed and decomposed in the step S2, steel wires in the rubber tire are not required to be taken out, and the production and processing speed of raw materials is improved; meanwhile, dust and sundries of the waste rubber tires are removed in a rinsing and magnetic attraction mode, so that the phenomenon that melanin on the rubber tires is removed by a brush or other cleaning devices is avoided, and further the full extraction of raw materials in the waste rubber tires is influenced; the rubber tires are unfolded, so that the rubber tires can be conveniently rinsed, and the rubber tires can be conveniently crushed by the crushing box 1;
s2: crushing raw materials: putting the cleaned rubber tire in the step S2 into a crushing box, wherein a cutting roller which is arranged above the crushing box in a rotating way in the same direction can cut the unfolded rubber tire into a strip-shaped structure to form a rubber tire strip; then, the rubber tire strips with strip-shaped structures can be crushed by the crushing rollers which are arranged below the cutting rollers and rotate in the opposite directions at different speeds to form rubber blocks; rolling and rubbing the rubber block by a rolling plate to enable the rubber block to generate flocculent rubber clusters, and simultaneously bonding the rolling plate to form carbon black powder; the cutting roller is arranged on the crushing box to rotate in the same direction, so that the cutting knife on the cutting roller can conveniently perform simultaneous vertical cutting operation on the rubber tire, and the phenomenon that the rubber tire slides downwards or upwards due to the cutting force in the same direction of the effective cutting knife when the cutting knife cuts the unfolded rubber tire in the same direction is prevented, and the rapid cutting operation of the rubber tire is further influenced; the rubber tire strips cut into strips are crushed in a differential mode, so that the shearing force of the crushing roller to the rubber tire strips can be improved, and the crushing and shearing effect of the crushing roller to the rubber tires with strip-shaped structures is further improved;
s3: extracting the gum oil: putting the flocculent rubber mass rolled and kneaded in the step S2 into a cracking reaction kettle, adding a small amount of catalyst into the cracking reaction kettle, heating to raise the temperature to 150-210 ℃ for catalytic cracking reaction, and condensing mixed steam generated after the reaction by a condensing device to form cracked rubber oil; simultaneously extracting carbon black generated after the cracking reaction kettle is cooled; the crushed flocculent rubber mass is subjected to cracking reaction through the cracking reaction kettle, and the rubber tire of the flocculent rubber mass not only improves the cracking speed of the cracking reaction kettle, but also reduces the use of a catalyst; meanwhile, carbon black generated after the cracking reaction kettle is cracked and cooled can be used in the raw material of the smc normal-temperature asphalt modifier, so that the product extracted from the waste rubber tire is fully utilized;
s4: mixing preparation: the rubber oil, the carbon black and other raw materials prepared in the step S3 are added into a stirring kettle according to the proportion, and the raw materials are mixed and stirred by a stirring device arranged in the stirring kettle for 40-60 minutes; the reaction temperature is gradually increased from 30 ℃ to 160 ℃ to obtain a product;
the crushing box in the S2 is internally provided with a cutting and crushing device, and the cutting and crushing device comprises a cutting roller, a rotating shaft, a cutting knife, a rotating gear, a crushing roller, a crushing block, an engaging gear and a connecting belt; a feed inlet is formed in the upper end in the crushing box, a cutting roller is symmetrically and rotatably mounted at the position of the feed inlet through a rotating shaft, and a cutting knife is arranged on an outer wall lane of the cutting roller; rotating gears are mounted at the end parts of the rotating shafts of the symmetrically arranged cutting rollers, and the symmetrically arranged rotating gears are meshed with each other through driven gears; the other end of the rotating shaft is connected with the output end of a driving motor, and the driving motor is arranged on the outer wall of the crushing box; a crushing roller is rotatably arranged under the cutting roller through a rotating shaft, and crushing blocks are symmetrically arranged on the crushing roller; meshing gears are sleeved on rotating shafts of the symmetrically arranged crushing rollers, and the symmetrically arranged meshing gears are in meshing transmission with each other; the rotating shaft on the driven gear is in transmission connection with the rotating shaft of the crushing roller through a connecting belt; a grinding mechanism is arranged right below the grinding roller; when the rubber tire crusher works, when the rubber tire after being unfolded and cleaned needs to be crushed, one end of the rubber tire is inserted into the feed inlet, then the driving motor rotates, the driving motor can drive the cutting rollers which are symmetrically arranged to rotate in the same direction, the cutting knife arranged on the cutting roller arranged on one side of the feed inlet can rotate from top to bottom and cut the rubber tire, the cutting knife arranged on the cutting roller arranged on the other side of the feed inlet can rotate from bottom to top in a crossed manner and cut the rubber tire into strip-shaped rubber tire strips, then the rubber tire strips can move to the middle of the crushing rollers which are symmetrically arranged, the crushing blocks on the crushing rollers can cut the rubber tire strips into block-shaped rubber tire blocks, then the rubber tire blocks can be rolled and kneaded by the rolling mechanism to form rubber tire masses, and the rubber tire masses can generate rubber oil and carbon black after being catalytically cracked by the cracking reaction kettle, thereby facilitating the extraction and separation of the raw materials.
Preferably, the rolling mechanism comprises a rolling plate, a supporting plate, a rotating column, a rotating disc, a connecting rod, a supporting block and a rubber soft rod; the grinding plates are symmetrically arranged below the grinding rollers; the supporting plate is fixedly arranged in the crushing box, and a rotating column is rotatably arranged on the supporting plate through a supporting block; the rotating column is connected with a rotating shaft on the crushing roller through a connecting belt, and a rotating disc is arranged on the rotating column; the outer circular wall of the rotating disc is rotatably provided with a connecting rod, and the connecting rod is fixedly connected to the side wall of the rolling plate; supporting blocks are symmetrically arranged on the supporting plate, and rubber soft rods are symmetrically arranged on the side walls of the supporting blocks; the rubber soft rods which are symmetrically arranged are respectively connected to the upper end surface and the lower end surface of the rolling plate; when the rubber tire strip grinding machine works, when the crushed massive rubber tire blocks need to be ground, the reversely rotating crushing rollers drive the rotating columns to rotate through the connecting belts, the rotating columns can drive the connecting rods to swing through the rotating discs, the swinging of the connecting rods can drive the symmetrically arranged grinding plates to swing oppositely, further, the rubber tire strips crushed through the crushing rollers can be ground through the symmetrically swinging grinding plates, meanwhile, the grinding plates are connected through the symmetrically arranged rubber soft plates, when the rotating discs drive the connecting rods to rotate to the highest position, the grinding plates can generate extrusion force on the rubber soft rods connected at the upper ends, meanwhile, the rubber soft rods arranged on the lower end faces can push the bottom ends of the grinding plates, so that the symmetrical grinding plates can roll the rubber tire blocks while receiving materials, and meanwhile, the grinding force of the grinding plates on the rubber tires can enable carbon black on the rubber tires to be separated, thereby facilitating the collection operation of the carbon black on the rubber tire; further improves the effect of forming lumps in the rubber tire and further improves the cracking effect of the rubber tire.
Preferably, the cutting knife is arranged in an arc structure, and the cutting knife is movably arranged on the cutting roller; the diameter of the meshing gear sleeved on the rotating shaft of one crushing roller is larger than that of the meshing gear sleeved on the rotating shaft of the other crushing roller; the cutting knife is movably arranged on the cutting roller, and when the cutting roller rotates rapidly, the cutting knife can rapidly cut the outer wall of the rubber tire under the rotating centrifugal force of the cutting roller, so that the rapid cutting effect of the cutting knife on the rubber tire is further improved; the diameter variation of the meshing gear who sets up simultaneously improves the high-speed shearing force of opposite direction rotation crushing roller to rubber tire for crushing operation can be carried out rubber tire fast with the crushing roller.
Preferably, the bottom end of the crushing box is provided with an elastic filter screen, and the elastic filter screen is arranged at the bottom end of the crushing box in a sliding manner; a sealing plate is movably arranged at the bottom end of the crushing box; the bottom end of the rolling plate is provided with an elastic extrusion rod, and the elastic extrusion rod is in extrusion contact with the upper end surface of the elastic filter screen; when the rubber tire rolling machine works, when rubber tire balls rolled by the rolling plate fall onto the elastic filter screen, the elastic filter screen can perform brushing and selecting operation on carbon black on the rubber tire balls, so that the carbon black and the rubber tire balls are separated, and the carbon black is convenient to extract; simultaneously when the board is swinging when rolling, the elasticity filter screen can be extruded to the elasticity extrusion pole that the board bottom set up of rolling for the elasticity filter screen can produce the vibration, further improves the quick filtering operation of elasticity filter screen to the carbon black.
The invention has the following beneficial effects:
1. according to the invention, through the matching of the rock wool fiber and the carbon black, the carbon black has certain light stability, rubber plastics can be aged by light, especially the ageing of the rubber plastics can be accelerated by ultraviolet rays in sunlight, the rock wool fiber can play a good heat preservation and insulation effect, so that the smc normal-temperature asphalt modifier can play a role in construction of an asphalt binder at normal temperature, and can play a good high-temperature-resistant and ultraviolet-resistant function on asphalt, and the service life of the asphalt is further prolonged after the asphalt is constructed in a normal-temperature environment because the asphalt contains a large amount of rubber plastics.
2. According to the invention, the cutting roller rotates on the crushing box in the same direction, so that the cutting knife on the cutting roller can conveniently perform simultaneous vertical cutting operation on the rubber tire, and the phenomenon that the rubber tire slides downwards or upwards due to the cutting force in the same direction of the effective cutting knife when the cutting knife cuts the unfolded rubber tire in the same direction is prevented, and the rapid cutting operation on the rubber tire is further influenced; the rubber tire strips cut into strips are crushed in a differential mode, the shearing force of the crushing roller to the rubber tire strips can be improved, and the crushing and shearing effect of the crushing roller to the rubber tires with strip-shaped structures is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of the crush box of the present invention;
FIG. 3 is an assembly view of the cutting and grinding mechanism of the present invention;
FIG. 4 is a cross-sectional view of the crush box of the present invention;
in the figure: crushing box 1, feed inlet 11, cutting and crushing device 2, cutting roller 21, rotating shaft 22, cutting knife 23, rotating gear 24, crushing roller 25, crushing block 26, meshing gear 27, connecting belt 28, driven gear 29, rolling mechanism 3, rolling plate 31, supporting plate 32, rotating column 33, rotating disc 34, connecting rod 35, supporting block 36, soft rubber rod 37, elastic filter screen 4, sealing plate 5 and elastic extrusion rod 6.
Detailed Description
An smc normal-temperature asphalt modifier and a preparation method thereof according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
The invention relates to a smc normal-temperature asphalt modifier which comprises the following raw materials in parts by weight:
rubber oil: 40-55 parts;
carbon black: 15-25 parts;
modified epoxy resin: 16-26 parts;
curing agent: 4-12 parts;
rock wool fiber: 3-10 parts.
The carbon black has good dispersibility, particularly high-structure carbon black, and is prepared into slurry to be mixed into the rubber oil, so that the modifier can be effectively and fully dispersed into the asphalt raw material, and the construction convenience of the asphalt binder under the normal temperature condition is further improved; meanwhile, the modified epoxy resin is added into the modifier, so that the effects of strong acid and alkali resistance, corrosion resistance, high temperature resistance, high hardness and no deformation when the asphalt binder and the modifier are mixed and paved on the ground are further improved; simultaneously the cooperation of rock wool fibre and carbon black, the carbon black has certain light stability, light can make rubber plastics ageing, especially ultraviolet ray in the sunshine can accelerate rubber plastics's ageing, rock wool fibre can play good thermal-insulated effect of heat preservation, make smc normal atmospheric temperature pitch modifier not only can play the effect of construction to the pitch binder under normal atmospheric temperature, can play good high temperature resistant to pitch simultaneously, ultraviolet resistance's function, prevent because contain a large amount of rubber plastics in the pitch, after further improving pitch and constructing in normal atmospheric temperature environment, the life of pitch.
As an embodiment of the invention, the rubber oil is a product extracted from a waste steel ring-free rubber tire by a cracking reaction kettle; the carbon black is a waste product left by a cracking reaction kettle and a raw material extraction device; the rock wool fiber is a product extracted from waste rock wool products; the rubber oil and the carbon black are extracted from the waste rubber tire without the steel ring, so that the waste rubber tire can be fully utilized; meanwhile, the carbon black is a waste product lifted from the cracking reaction kettle and the raw material extraction device, so that the production cost of the raw material in the smc normal-temperature asphalt modifier is reduced, and the waste generated in the production of the raw material in the smc normal-temperature asphalt modifier can be recycled to the raw material, so that the production cost of the smc normal-temperature asphalt modifier is further reduced.
As shown in fig. 1 to 4, the preparation method of the smc normal temperature asphalt modifier is used for producing the smc normal temperature asphalt modifier, and comprises the following steps:
s1, pretreatment of raw materials: firstly, putting the collected waste rubber tires without steel rings into a washing tank, and simultaneously unfolding the waste rubber tires through a flattening device; removing sundries, dust and metal adhered to the outer wall of the waste rubber tire in a rinsing and magnetic attraction mode; the waste rubber tire without the steel ring is adopted, so that the rubber tire is conveniently and rapidly crushed and decomposed in the step S2, steel wires in the rubber tire are not required to be taken out, and the production and processing speed of raw materials is improved; meanwhile, dust and sundries of the waste rubber tires are removed in a rinsing and magnetic attraction mode, so that the phenomenon that melanin on the rubber tires is removed by a brush or other cleaning devices is avoided, and further the full extraction of raw materials in the waste rubber tires is influenced; the rubber tires are unfolded, so that the rubber tires can be conveniently rinsed, and the rubber tires can be conveniently crushed by the crushing box 1;
s2: crushing raw materials: the cleaned rubber tire in the step S2 is put into a crushing box 1, and the cutting roller 21 which is arranged above the crushing box 1 in the same direction can cut the unfolded rubber tire into a strip-shaped structure to form a rubber tire strip; then, the rubber tire strips with strip-shaped structures can be crushed by the crushing roller 25 which is arranged below the cutting roller 21 and rotates in the opposite direction at a different speed to form rubber blocks; rolling and rubbing the rubber block by using a rolling plate 31 to enable the rubber block to generate flocculent rubber clusters, and simultaneously bonding the rolling plate 31 to form carbon black powder; the cutting roller 21 is arranged on the crushing box 1 to rotate in the same direction, so that the cutting knife 23 on the cutting roller 21 can conveniently cut the rubber tire up and down simultaneously, and the phenomenon that the rubber tire slides downwards or upwards due to the cutting force in the same direction of the effective cutting knife 23 when the cutting knife 23 cuts the unfolded rubber tire in the same direction is prevented, and the rapid cutting operation of the rubber tire is further influenced; the rubber tire strips cut into strips are crushed in a differential mode, so that the shearing force of the crushing roller 25 on the rubber tire strips can be improved, and the crushing and shearing effect of the crushing roller 25 on the rubber tires with strip structures is further improved;
s3: extracting the gum oil: putting the flocculent rubber mass rolled and kneaded in the step S2 into a cracking reaction kettle, adding a small amount of catalyst into the cracking reaction kettle, heating to raise the temperature to 150-210 ℃ for catalytic cracking reaction, and condensing mixed steam generated after the reaction by a condensing device to form cracked rubber oil; simultaneously extracting carbon black generated after the cracking reaction kettle is cooled; the crushed flocculent rubber mass is subjected to cracking reaction through the cracking reaction kettle, and the rubber tire of the flocculent rubber mass not only improves the cracking speed of the cracking reaction kettle, but also reduces the use of a catalyst; meanwhile, carbon black generated after the cracking reaction kettle is cracked and cooled can be used in the raw material of the smc normal-temperature asphalt modifier, so that the product extracted from the waste rubber tire is fully utilized;
s4: mixing preparation: the rubber oil, the carbon black and other raw materials prepared in the step S3 are added into a stirring kettle according to the proportion, and the raw materials are mixed and stirred by a stirring device arranged in the stirring kettle for 40-60 minutes; the reaction temperature is gradually increased from 30 ℃ to 160 ℃ to obtain a product;
wherein, in the S2, a cutting and crushing device 2 is arranged in the crushing box 1, and the cutting and crushing device 2 comprises a cutting roller 21, a rotating shaft 22, a cutting knife 23, a rotating gear 24, a crushing roller 25, a crushing block 26, a meshing gear 27 and a connecting belt 28; a feed inlet 11 is formed in the upper end of the crushing box 1, cutting rollers 21 are symmetrically and rotatably mounted at the feed inlet 11 through rotating shafts 22, and cutting knives 23 are arranged on outer wall lanes of the cutting rollers 21; the end parts of the rotating shafts 22 of the symmetrically arranged cutting rollers 21 are respectively provided with a rotating gear 24, and the symmetrically arranged rotating gears 24 are mutually meshed through a driven gear 29; the other end of the rotating shaft 22 is connected with the output end of a driving motor, and the driving motor is arranged on the outer wall of the crushing box 1; a crushing roller 25 is rotatably arranged under the cutting roller 21 through a rotating shaft 22, and crushing blocks 26 are symmetrically arranged on the crushing roller 25; the rotating shafts 22 of the symmetrically arranged crushing rollers 25 are sleeved with meshing gears 27, and the symmetrically arranged meshing gears 27 are in meshing transmission; the rotating shaft 22 on the driven gear 29 is in transmission connection with the rotating shaft 22 of the crushing roller 25 through a connecting belt 28; a rolling mechanism 3 is arranged right below the crushing roller 25; when the rubber tire crusher works, when the rubber tire after being unfolded and cleaned needs to be crushed, one end of the rubber tire is firstly inserted into the feed inlet 11, then the driving motor rotates, the driving motor can drive the cutting rollers 21 which are symmetrically arranged to rotate in the same direction, the cutting knife 23 arranged on the cutting roller 21 arranged on one side of the feed inlet 11 can rotate from top to bottom to cut the rubber tire, the cutting knife 23 arranged on the cutting roller 21 arranged on the other side of the feed inlet 11 can rotate from bottom to top in a crossed manner to cut the rubber tire into strip-shaped rubber tire strips, then the rubber tire strips can move to the middle of the crushing rollers 25 which are symmetrically arranged, the crushing blocks 26 on the crushing rollers 25 can cut the rubber tire strips into block-shaped rubber tire blocks, then the rubber tire blocks can be rolled and kneaded by the rolling mechanism 3 to form rubber tire groups, the rubber tire groups can generate rubber oil and carbon black after being subjected to catalytic cracking by the cracking reaction kettle, thereby facilitating the extraction and separation of the raw materials.
As an embodiment of the present invention, the rolling mechanism 3 includes a rolling plate 31, a support plate 32, a rotating column 33, a rotating disk 34, a connecting rod 35, a support block 36 and a soft rubber rod 37; the rolling plates 31 are symmetrically arranged below the crushing rollers 25; the supporting plate 32 is fixedly arranged in the crushing box 1, and the supporting plate 32 is rotatably provided with a rotating column 33 through a supporting block 36; the rotating column 33 is connected with the rotating shaft 22 on the crushing roller 25 through a connecting belt 28, and a rotating disc 34 is arranged on the rotating column 33; a connecting rod 35 is rotatably mounted on the outer circular wall of the rotating disc 34, and the connecting rod 35 is fixedly connected to the side wall of the rolling plate 31; the supporting plate 32 is symmetrically provided with supporting blocks 36, and the side walls of the supporting blocks 36 are symmetrically provided with rubber soft rods 37; the rubber soft rods 37 which are symmetrically arranged are respectively connected to the upper end surface and the lower end surface of the rolling plate 31; when the rubber tire rolling machine works, when a crushed massive rubber tire block needs to be rolled, the crushing roller 25 which rotates reversely can drive the rotating column 33 to rotate through the connecting belt 28, the rotating column 33 can rotate to drive the connecting rod 35 to swing through the rotating disc 34, the connecting rod 35 can swing to drive the rolling plates 31 which are symmetrically arranged to swing oppositely, then the rubber tire strip crushed through the crushing roller 25 can be rolled through the rolling plates 31 which swing symmetrically, meanwhile, the rolling plates 31 are connected through the rubber soft plates which are symmetrically arranged, when the rotating disc 34 drives the connecting rod 35 to rotate to the highest position, the rolling plates 31 can generate extrusion force on the rubber soft rods 37 which are connected at the upper end, meanwhile, the rubber soft rods 37 which are arranged at the lower end face can push the bottom end of the rolling plates 31, so that the symmetrical rolling plates 31 can roll the rubber tire block while receiving the material, meanwhile, the rolling force of the rolling plate 31 on the rubber tire can separate the carbon black on the rubber tire, so that the carbon black on the rubber tire can be conveniently collected; further improves the effect of forming lumps in the rubber tire and further improves the cracking effect of the rubber tire.
As an embodiment of the present invention, the cutting knife 23 is provided with an arc structure, and the cutting knife 23 is movably mounted on the cutting roller 21; the diameter of the meshing gear 27 sleeved on the rotating shaft 22 of one of the crushing rollers 25 is larger than that of the meshing gear 27 sleeved on the rotating shaft 22 of the other crushing roller 25; the cutting knife 23 is movably arranged on the cutting roller 21, and when the cutting roller 21 rotates rapidly, the cutting knife 23 can rapidly cut the outer wall of the rubber tire under the rotating centrifugal force of the cutting roller 21, so that the rapid cutting effect of the cutting knife 23 on the rubber tire is further improved; the diameter of the meshing gear 27 that sets up simultaneously is big or small different, improves the high-speed shearing force of the rotatory crushing roller 25 of subtending to rubber tire for crushing operation can be carried out rubber tire fast with crushing roller 25.
As an embodiment of the invention, the bottom end of the crushing box 1 is provided with an elastic filter screen 4, and the elastic filter screen 4 is arranged at the bottom end of the crushing box 1 in a sliding manner; a sealing plate 5 is movably arranged at the bottom end of the crushing box 1; the bottom end of the rolling plate 31 is provided with an elastic extrusion rod 6, and the elastic extrusion rod 6 is in extrusion contact with the upper end surface of the elastic filter screen 4; when the rubber tire rolling machine works, when rubber tire groups rolled by the rolling plate 31 fall onto the elastic filter screen 4, the elastic filter screen 4 can perform brushing and selecting operation on carbon black on the rubber tire groups, so that the carbon black and the rubber tire groups are separated, and the carbon black is convenient to extract; simultaneously when rolling board 31 is when the swing, the elasticity extrusion pole 6 that rolling board 31 bottom set up can extrude elasticity filter screen 4 for elasticity filter screen 4 can produce the vibration, further improves the quick filtering operation of elasticity filter screen 4 to the carbon black.
The embodiment of the smc normal-temperature asphalt modifier provided by the invention is as follows:
the first embodiment is as follows: the invention relates to a smc normal-temperature asphalt modifier which is prepared from the following raw materials in parts by weight: rubber oil: 40 parts of a mixture; carbon black: 15 parts of (1); modified epoxy resin: 16 parts of a mixture; curing agent: 4 parts of a mixture; rock wool fiber: 3 parts of a mixture; preparing the asphalt modifier by adopting the preparation method of the smc normal-temperature asphalt modifier;
example two: the invention relates to a smc normal-temperature asphalt modifier which is prepared from the following raw materials in parts by weight: rubber oil: 45 parts of (1); carbon black: 18 parts of a mixture; modified epoxy resin: 19 parts of a mixture; curing agent: 7 parts; rock wool fiber: 5 parts of a mixture; preparing the asphalt modifier by adopting the preparation method of the smc normal-temperature asphalt modifier;
example three: the invention relates to a smc normal-temperature asphalt modifier which is prepared from the following raw materials in parts by weight: rubber oil: 50 parts of a mixture; carbon black: 21 parts of (1); modified epoxy resin: 22 parts of (A); curing agent: 9 parts of (1); rock wool fiber: 8 parts of a mixture; preparing the asphalt modifier by adopting the preparation method of the smc normal-temperature asphalt modifier;
example four: the invention relates to a smc normal-temperature asphalt modifier which is prepared from the following raw materials in parts by weight: rubber oil: 55 parts of (1); carbon black: 25 parts of (1); modified epoxy resin: 26 parts of (1); curing agent: 12 parts of (1); rock wool fiber: 10 parts of (A); preparing the asphalt modifier by adopting the preparation method of the smc normal-temperature asphalt modifier;
ultraviolet resistance test:
experimental equipment: four fields are needed, and the size of the field is 1 square meter; 4 high-temperature ultraviolet devices; 4 shots of the same weight; 4 graduated scales;
taking the mass parts of the raw material of the smc normal-temperature asphalt modifier in the embodiments 1 to 4 as four groups of experimental data, and preparing the four groups of raw materials of the smc normal-temperature asphalt modifier according to the production process and the four groups of experimental data; mixing the prepared four groups of smc normal-temperature asphalt modifiers with pre-prepared asphalt, respectively paving the asphalt mixture on a preset ground with the size of 1 square meter, and then simulating ultraviolet rays at 80 ℃ to irradiate the four groups of experimental groups for 3 hours; after the irradiation time is over, four auxiliary personnel hold the shot, the height of the shot from the asphalt plane is measured by a scale to be 1.2m, then the auxiliary personnel are informed to drop the shot by the experimenter, and the experimenter observes the sinking degree of the asphalt plane after the shot falls on the asphalt plane; the degree of the depression is divided into shallow trace, deep trace and deep trace; the raw material composition table (table 1) for the four experimental groups is as follows:
TABLE 1 raw material composition table (parts by weight) of four experimental groups
According to the experimental table, the aging resistance and the ultraviolet resistance of the asphalt are gradually improved after the asphalt is mixed with the modifier along with the increasing of the content of the carbon black and the rock wool fiber, so that the service life of the asphalt in a high-temperature environment is prolonged, and the construction operability of the asphalt in a low-temperature environment is improved; when the content of the carbon black and the rock wool fibers reaches the maximum value, the carbon black and the rock wool fibers can influence the curing effect of the curing agent on the modified epoxy resin, and further influence the hardness and the high-temperature resistance of the asphalt in a high-temperature environment.
In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. An smc normal temperature asphalt modifier is characterized in that: the material comprises the following raw materials in parts by weight:
rubber oil: 40-55 parts;
carbon black: 15-25 parts;
modified epoxy resin: 16-26 parts;
curing agent: 4-12 parts;
rock wool fiber: 3-10 parts.
2. The smc normal temperature asphalt modifier of claim 1, which is characterized in that: the rubber oil is a product extracted from a waste steel ring-free rubber tire through a cracking reaction kettle; the carbon black is a waste product left by a cracking reaction kettle and a raw material extraction device; the rock wool fiber is a product extracted from waste rock wool products.
3. A preparation method of smc normal temperature asphalt modifier is characterized by comprising the following steps: the method is suitable for preparing the smc normal-temperature asphalt modifier in the claims 1-2; the method comprises the following steps:
s1, pretreatment of raw materials: firstly, putting the collected waste rubber tires without steel rings into a washing tank, and simultaneously unfolding the waste rubber tires through a flattening device; removing sundries, dust and metal adhered to the outer wall of the waste rubber tire in a rinsing and magnetic attraction mode;
s2: crushing raw materials: the cleaned rubber tire in the step S2 is put into a crushing box (1), and a cutting roller (21) which is arranged above the crushing box (1) in a same-direction rotating mode can cut the unfolded rubber tire into a strip-shaped structure to form a rubber tire strip; then, the rubber tire strip with the strip-shaped structure can be crushed by a crushing roller (25) which is arranged below the cutting roller (21) and rotates in a differential speed reverse direction to form a rubber block; rolling and rubbing the rubber block by using a rolling plate (31) to enable the rubber block to generate flocculent rubber clusters, and simultaneously bonding the rolling plate (31) to form carbon black powder;
s3: extracting the gum oil: putting the flocculent rubber mass rolled and kneaded in the step S2 into a cracking reaction kettle, adding a small amount of catalyst into the cracking reaction kettle, heating to raise the temperature to 150-210 ℃ for catalytic cracking reaction, and condensing mixed steam generated after the reaction by a condensing device to form cracked rubber oil; simultaneously extracting carbon black generated after the cracking reaction kettle is cooled;
s4: mixing preparation: the rubber oil, the carbon black and other raw materials prepared in the step S3 are added into a stirring kettle according to the proportion, and the raw materials are mixed and stirred by a stirring device arranged in the stirring kettle for 40-60 minutes; the reaction temperature is gradually increased from 30 ℃ to 160 ℃ to obtain a product;
wherein, a cutting and crushing device (2) is arranged in the crushing box (1) in the S2, and the cutting and crushing device (2) comprises a cutting roller (21), a rotating shaft (22), a cutting knife (23), a rotating gear (24), a crushing roller (25), a crushing block (26), a meshing gear (27) and a connecting belt (28); a feed inlet (11) is formed in the upper end of the crushing box (1), a cutting roller (21) is symmetrically and rotatably mounted at the position of the feed inlet (11) through a rotating shaft (22), and a cutting knife (23) is arranged on an outer wall roadway of the cutting roller (21); rotating gears (24) are mounted at the end parts of rotating shafts (22) of the symmetrically arranged cutting rollers (21), and the symmetrically arranged rotating gears (24) are meshed with each other through driven gears (29); the other end of the rotating shaft (22) is connected with the output end of a driving motor, and the driving motor is arranged on the outer wall of the crushing box (1); a crushing roller (25) is rotatably arranged under the cutting roller (21) through a rotating shaft (22), and crushing blocks (26) are symmetrically arranged on the crushing roller (25); meshing gears (27) are sleeved on rotating shafts (22) of the symmetrically arranged crushing rollers (25), and the symmetrically arranged meshing gears (27) are in meshing transmission with each other; the rotating shaft (22) on the driven gear (29) is in transmission connection with the rotating shaft (22) of the crushing roller (25) through a connecting belt (28); and a rolling mechanism (3) is arranged under the crushing roller (25).
4. The preparation method of the smc normal temperature asphalt modifier of claim 3, which is characterized in that: the rolling mechanism (3) comprises a rolling plate (31), a support plate (32), a rotating column (33), a rotating disc (34), a connecting rod (35), a support block (36) and a rubber soft rod (37); the grinding plates (31) are symmetrically arranged below the grinding rollers (25); the supporting plate (32) is fixedly arranged in the crushing box (1), and the supporting plate (32) is rotatably provided with a rotating column (33) through a supporting block (36); the rotating column (33) is connected with a rotating shaft (22) on the crushing roller (25) through a connecting belt (28), and a rotating disc (34) is arranged on the rotating column (33); a connecting rod (35) is rotatably arranged on the outer circular wall of the rotating disc (34), and the connecting rod (35) is fixedly connected to the side wall of the rolling plate (31); supporting blocks (36) are symmetrically installed on the supporting plate (32), and rubber soft rods (37) are symmetrically installed on the side walls of the supporting blocks (36); the rubber soft rods (37) which are symmetrically arranged are respectively connected to the upper end face and the lower end face of the rolling plate (31).
5. The preparation method of the smc normal temperature asphalt modifier of claim 3, which is characterized in that: the cutting knife (23) is arranged to be of an arc-shaped structure, and the cutting knife (23) is movably arranged on the cutting roller (21); the diameter of the meshing gear (27) sleeved on the rotating shaft (22) of one crushing roller (25) is larger than that of the meshing gear (27) sleeved on the rotating shaft (22) of the other crushing roller (25).
6. The preparation method of the smc normal temperature asphalt modifier of claim 4, which is characterized in that: the bottom end of the crushing box (1) is provided with an elastic filter screen (4), and the elastic filter screen (4) is arranged at the bottom end of the crushing box (1) in a sliding manner; a sealing plate (5) is movably arranged at the bottom end of the crushing box (1); the bottom of the rolling plate (31) is provided with an elastic extrusion rod (6), and the elastic extrusion rod (6) is in extrusion contact with the upper end face of the elastic filter screen (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010186212.9A CN111234544A (en) | 2020-03-17 | 2020-03-17 | Smc normal-temperature asphalt modifier and preparation method thereof |
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| CN202010186212.9A CN111234544A (en) | 2020-03-17 | 2020-03-17 | Smc normal-temperature asphalt modifier and preparation method thereof |
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