153 results about "Waste rubber" patented technology

The invention belongs to the technical field of RAP recycled asphalt mixtures, and particularly relates to a high-dosage RAP recycled asphalt mixture for alpine regions and a preparation method of the high-dosage RAP recycled asphalt mixture. The high-dosage RAP recycled asphalt mixture for the alpine region is characterized by comprising the following components in percentage by mass: 50-60% of RAP, 3-6% of mineral powder, 1-3% of new asphalt, 1-2% of a composite regenerant, 1-2% of a modifier and the balance of a new aggregate, the composite regenerant is composed of pine tar, plant-based epoxy ester oil, cashew nut shell oil and a penetrant. The modifier is prepared from regenerated low-density polyvinyl chloride, hyperbranched epoxy resin and liquid polybutadiene rubber coated waste rubber powder. According to the technical scheme provided by the invention, the technical problems of poor low-temperature performance, water stability and freeze-thaw cycle stability when a high-dosage RAP recycled asphalt mixture is used in an alpine region are solved.

The invention relates to the technical field of road engineering, in particular to an all-solid waste rubber-based composite modified foam cold recycled asphalt mixture and a preparation method thereof, and the all-solid waste rubber-based composite modified foam cold recycled asphalt mixture comprises the following components in parts by mass: 150-200 parts of graded precisely-controlled recycled aggregate, 10-25 parts of recycled mineral activity enhancing powder, 5-10 parts of an industrial solid waste reinforcing agent and 20-40 parts of solid waste-based recycled foam asphalt. The mixture utilizes various solid wastes for recycling, has excellent pavement performance, high strength, crack resistance and durability, can be constructed at normal temperature or low temperature, and is low in energy consumption and environment-friendly. Through composite modification of foamed asphalt and rubber powder, early strength and stability are significantly improved, the problem of slow development of early strength of a cold recycled material is overcome, the construction period is shortened, and traffic is quickly opened. The method is simple in process, low in cost and convenient to construct, meets the requirements of green and low-carbon construction, provides a new way for the double-carbon target in the traffic field, and is remarkable in economic and social benefits and wide in application prospect.

The present application relates to the technical field of rubber crushing, in particular to a waste rubber pyrolysis and crushing processing equipment, which comprises a base, a lower hopper, a crushing unit and a receiving hopper, positioning pin shafts are fixedly installed on both sides of the base, a transmission shaft is rotatably connected to the top of the base, a driving motor is installed on the top surface of the base, the output end of the driving motor is rotatably connected to the bottom end of the transmission shaft, and the number of the crushing units is three.In the present application, the material is extruded towards the conical screen mesh through the rotation of the tile ring, so that part of the blocky material passes through the screen holes on the conical screen mesh to the inside of the conical screen mesh, and the part of the material passing through the conical screen mesh is cut when the execution module rotates, thereby realizing the cyclic cutting and crushing of the material.The present application utilizes the elasticity of waste rubber itself, extrudes the material through the tile ring in cycles, and cuts the part protruding to the inside of the conical screen mesh, thereby realizing the multiple crushing of the blocky material.

The utility model discloses a rubber breaking mechanism for rubber mixing, which belongs to the field of waste rubber recovery and comprises a box body, four corners of the bottom of the box body are fixedly connected with supporting legs, the top of the box body is fixedly connected with a protective cover, the bottom of the box body is provided with a blanking component, and a rubber breaking component and a cleaning component are arranged in the box body. The cleaning assemblies comprise cleaning rollers rotationally connected between the inner walls of the box body, ventilation cavities are formed in the cleaning rollers, a plurality of air blowing holes are formed in the outer walls of the cleaning rollers, air supply assemblies are arranged on the side walls of the box body, and the air supply assemblies are used for supplying air into the ventilation cavities formed in the cleaning rollers. The rubber cleaning device has the beneficial effects that air is supplied to the interior of the cleaning roller through the air supply assembly, air is blown to the rubber breaking roller in the rotating process of the cleaning roller, on one hand, softened rubber can be conveniently cooled to be conveniently cleaned after being solidified, on the other hand, the rubber clamped in the rubber breaking roller is loosened through air blowing, and the cleaning efficiency is improved.

The application relates to the technical field of composite asphalt materials, in particular to a composite asphalt material based on modified SBS and a preparation method thereof, which comprises the following steps: S1. After heating, base asphalt is added with aromatic oil, and stirring is carried out for 15-20 min to obtain softened asphalt; S2. Preparation of modified SBS; S3. Modified SBS is gradually added into the softened asphalt, and shearing is carried out for 30-40 min; S4. Modified waste rubber powder is added, and after continuous shearing, sulfur is added, development is carried out at a rotating speed of 800-1000 rpm for 50-60 min, and the composite asphalt material based on modified SBS is obtained after standing and defoaming. Through the synergistic effect of modified SBS, modified waste rubber powder and modified additives, the synchronous improvement of high-temperature performance, low-temperature performance and fatigue resistance is realized, the performance attenuation rate of the composite asphalt material under the conditions of thermal oxygen aging and ultraviolet aging is reduced, and the service life of the asphalt pavement is prolonged.

This application discloses an automated control method and system for waste rubber recycling equipment, relating to the field of waste rubber recycling technology. It is used to control the initial pyrolysis process in a pyrolysis reactor. The method includes the following steps: before the waste rubber enters the pyrolysis reactor, obtaining the effective moisture content and bound water content level of the waste rubber; selecting a corresponding initial pyrolysis treatment strategy based on the effective moisture content and bound water content level to suppress pressure fluctuations and energy consumption surges caused by rapid moisture evaporation during the initial pyrolysis process; and adjusting the temperature rise management curve, pressure relief management threshold, pressure relief management method, and waste rubber feeding management rate of the initial pyrolysis process according to the selected initial pyrolysis treatment strategy to achieve heating control, pressure control, and feeding control of the initial pyrolysis process. This application can effectively suppress pressure fluctuations and energy consumption surges caused by rapid moisture evaporation during the initial pyrolysis process, reducing the probability of production interruption.

The application provides a high-strength and high-toughness PVC profile and a preparation method thereof. The high-strength and high-toughness PVC profile comprises a first high-strength layer, a first fiber layer, a PVC layer, a second fiber layer and a second high-strength layer in sequence. The first high-strength layer and the second high-strength layer each comprise the following components in parts by weight: PVC resin 100-150 parts, calcium-zinc stabilizer 3-5 parts, reinforcing particles 15-20 parts, internal lubricant 0.5 part, external lubricant 0.5 part and stearic acid 0.2 part. The reinforcing particles are modified waste rubber particles. The first fiber layer and the second fiber layer are formed by rolling PVC slurry on fiber fabric, so that the comprehensive performance of the PVC profile is effectively improved.

The present application relates to the technical field of modified asphalt, and relates to cottonseed biological oil pre-desulfurization rubber powder modified asphalt and a preparation method thereof, wherein cottonseed oil residues containing unsaturated fatty acids are used to pre-swelling desulfurization of waste rubber powder, a three-dimensional cross-linking network of the rubber powder is effectively destroyed, functional group reconstruction is promoted, the compatibility and interface physical embedding of the rubber powder and base asphalt are improved, and the problem of easy delamination is overcome; the lubricating and diluting effects of the biological oil can reduce the tackifying effect of the rubber powder and reduce the structural viscosity of the modified system; the swelling rubber powder forms a dense elastic network in the matrix, which not only retains strong high-temperature anti-rutting and anti-permanent deformation capability, but also reduces the low-temperature stiffness modulus, improves the low-temperature flexibility and stress relaxation capability of the asphalt; the preparation method realizes high-value utilization of waste tires and oil refining waste residues, and has environmental protection and economic benefits.

The utility model provides an automatic feeding device for waste rubber oil refining, the automatic feeding device for waste rubber oil refining comprises an automatic feeding device body, the automatic feeding device body comprises a material rack, a material box, a rotating mechanism and a moving mechanism, the material rack is connected with the material box, an extrusion mechanism is arranged in the material box, and the rotating mechanism is connected with the moving mechanism. The material frame is connected with the fixing frame through a rod piece, the fixing frame is connected with the moving mechanism, and the bottom of the fixing frame is connected with the supporting column. The moving mechanism is matched with the rotating mechanism, so that the push rod moves back and forth repeatedly, the intermittent feeding effect is achieved, and material accumulation caused by continuous feeding is prevented; and a push plate is arranged on a push rod, so that materials which fall into a containing groove and are not placed correctly can be corrected, when the materials in the material box are blocked and cannot fall off through the extrusion mechanism, the materials can be extruded downwards through cooperation of a screw and a pressing plate in the extrusion mechanism, the materials fall off, and the device can operate normally.

The utility model discloses a waste discharge adhesive tape winding mechanism and a GDL cutting forming device. The waste discharge adhesive tape winding mechanism comprises a fixing frame, a winding assembly and a broken tape detection assembly. The winding assembly comprises an air swelling shaft, a winding torque motor and a plurality of winding units, the winding torque motor is hung below the fixing frame, one end of the air swelling shaft is connected with the winding torque motor, and the air swelling shaft is sleeved with the winding units; the winding unit comprises an assembly inner ring, an assembly outer ring, a friction plate and a plurality of adjusting screws, the assembly inner ring is sleeved and fixed on the air expansion shaft, the assembly outer ring is sleeved on the assembly inner ring, a ball bearing is arranged between the assembly outer ring and the assembly inner ring, the friction plate is sleeved on the air expansion shaft, and the adjusting screws are arranged on the air expansion shaft. The friction plate is arranged in the assembling inner ring and attached to one side of the assembling inner ring and one side of the assembling outer ring, and the adjusting screw penetrates through the friction plate and is embedded into the assembling inner ring. According to the utility model, the winding efficiency of the waste discharge adhesive tape is effectively improved.

The utility model relates to the field of waste rubber processing especially, and more particularly to a kind of auxiliary waste rubber mechanochemical regeneration extruder, including base, shell, feed inlet, discharge plate and plasticizing mouth etc., multiple bases are connected in shell lower side, feed inlet is connected in shell left part upper side, discharge plate is rotatably connected in shell right upper portion, plasticizing mouth is clamped in shell right part upper side, and plasticizing mouth is contacted with discharge plate.The utility model pours waste rubber and softener into shell and is devulcanized or degraded, is heated by heating ring, is broken by extruding lever rotation, is filtered after flowing through filter screen, then is extruded into shape from plasticizing mouth, then is moved by push block, and the filter screen used is removed and is replaced by impurity, so that waste rubber can be treated and filtered, and extruded at the same time, convenient filter screen switching use and removal, convenient filter screen loading and unloading, cleaning and replacement, impurity cleaning is facilitated, cleaning efficiency is improved, and it is convenient to use.

The utility model relates to the technical field of crushing and grinding, specifically to a kind of crushing and grinding device for waste rubber tire recycling and processing, including the box of one end open one end closed, first through-hole is set up in the box, the first through-hole is set up in the box, two first sliding slots are set up, the screening assembly includes two sliding strips, sieve plate, extension plate, collection plate and two first limiting plates, extension plate slides, because sieve plate is fixed on sliding strip, make sieve plate slide along first sliding slot, by extension plate quick shaking, realize vibration, because sieve plate is inclined design, make unqualified rubber powder move to the other side, make rubber powder slowly from collection plate into secondary grinding, to unqualified rubber powder secondary grinding, solve the problem that filter is damaged due to serious blockage, prevent large rubber into subsequent production link, make final product appear more balanced, improve the quality and performance of product.

The application provides a method for preparing anti-permeation anticorrosive filler from waste rubber and anticorrosive paint, and belongs to the technical field of paint, which comprises the following steps: crushing and sieving waste rubber to obtain rubber particles, then sequentially performing acid pickling, alkali washing and water washing, and drying, then adding the rubber particles into tetrachloroethylene for chlorination, then removing flocculent products by using a blast rotary furnace, then adding the rubber particles into tetrachloroethylene again for chlorination and performing bubbling operation, and then draining to obtain the anti-permeation anticorrosive filler. The anti-permeation anticorrosive filler prepared by the method has improved chlorine content and enhanced corrosion resistance, the anticorrosive coating prepared by using the filler can effectively solve the diffusion problem of water molecules, can effectively inhibit the permeation and migration of corrosion medium chloride ions, and can greatly improve the anti-permeation performance.

This invention discloses a long-life pavement material for extreme and complex conditions and its preparation method. Modified asphalt pavement material is prepared using ultra-deeply decrosslinked rubber as the main raw material (with a content greater than 50%). Through specific processes and formulations, this pavement material retains excellent self-healing properties even under extreme low-temperature conditions (< -10 °C), with a healing efficiency greater than 50%, and a healing efficiency greater than 30% after aging, resulting in a long service life. This invention not only solves the problem of easy cracking in asphalt pavements and significantly improves their service life, but also enables the high-value resource utilization of waste rubber, resulting in significant environmental and economic benefits.

The application discloses a recycling method of valuable metals in lithium ion batteries, and relates to the technical field of battery recycling. The application adopts waste rubber particles as fuel and reducing agent, mixes the waste rubber particles with lithium ion battery electrode powder to granulate, and then carries out one-time and two-time roasting pyrolysis, so that the gas generated by the waste rubber particles has high calorific value and strong reducibility, the ternary lithium battery electrode powder can be reduced into soluble lithium oxide, and the lithium metal can be recycled through water immersion, the metal recovery rate is high, the energy consumption is low, the resource recycling rate can be improved by using the waste rubber particles, and the method is economical and environment-friendly.

The invention discloses a chemical treatment method for refining waste rubber powder particles, and belongs to the technical field of solid waste resource utilization. According to the chemical treatment method disclosed by the invention, coarse rubber powder obtained by recycling waste rubber products is taken as a raw material, and refined rubber powder with uniform particle size is finally obtained through a multi-step chemical treatment process of raw material pretreatment, chemical crosslinking bond breakage, surface modification and ultrasonic-assisted cleaning and drying. According to the method, the problems of high energy consumption, non-uniform particle size and rubber powder performance degradation caused by excessive etching of a chemical method in a traditional physical grinding method are solved, the particle size of the prepared superfine rubber powder can be stably controlled to be 0.1-50 microns, and the method can be widely applied to the fields of rubber regeneration, asphalt modification and the like.

This application provides a low-temperature matrix asphalt modifier and its preparation method, belonging to the field of road materials. The low-temperature matrix asphalt modifier is prepared from raw materials comprising the following components in parts by weight: SBR latex: 18-25 parts; waste rubber powder: 22-30 parts; base plasticizing resin: 18-22 parts; compatibilizer: 25-32 parts; crosslinking agent: 2-3 parts; stabilizer: 1.5-3.5 parts; high-adhesion resin: 5-8 parts; anti-aging agent: 0.05-0.15 parts; wherein the base plasticizing resin is a C5 / C9 copolymer petroleum resin with a softening point... 90~110℃; waste rubber powder is modified with vinyl polysiloxane, with a particle size of 80~120 mesh and a grafting rate of ≥85%; the compatibilizer is a compound of naphthenic oil and aromatic oil; the high-adhesion resin is C9 petroleum resin with a softening point of 110~130℃; the anti-aging agent has a melting point of 110~115℃ and excellent compatibility, which can significantly reduce the mixing temperature of asphalt mixtures, greatly reduce energy consumption during construction, and enable construction in environments above -10℃.

The invention belongs to the technical field of solid waste resource utilization and fuel preparation, and particularly relates to a method for preparing fuel oil from waste plastics or waste rubber. Comprising the following steps: S1, pretreating raw materials; s2, loading materials; s3, mechanochemical conversion: carrying out mechanical ball milling to break and convert molecular chains of the waste plastics or the waste rubber; and S4, product separation: carrying out solid-liquid separation on the ball-milled system, and collecting to obtain the hydrocarbon mixed fuel oil which is in a liquid state or a half-flow state at normal temperature. The method can be used for treating polyolefin and rubber wastes and a mixed system thereof, and is close to an actual complex waste plastic source; additional high temperature and organic solvents are not needed, the process is simplified, and energy consumption and environmental burden are reduced; under the synergistic effect of mechanochemistry and catalytic regulation, a normal-temperature flowable oil product can be stably obtained, and the carbon number and molecular weight distribution are more adaptive to the application scene of fuel oil; and reduction and high-value utilization of the waste plastics are realized, and a supplementary source is provided for fuel oil.

The utility model discloses a gas-solid separation device for waste rubber pyrolysis gas, which comprises a separation box (1), a separation cavity (2) is formed in the middle of the separation box (1), a waste gas inlet and a waste gas outlet are respectively arranged at two ends of the separation box (1), and a waste gas inlet pipe (3) and a waste gas outlet pipe (4) are respectively connected onto the waste gas inlet and the waste gas outlet. The end part of the waste gas inlet pipe (3) extends into the separation box (1) and is connected with a shutter guide plate (5), the end part of the waste gas outlet pipe (4) extends into the separation box (1) and is connected with an anti-vortex device (6), and a carbon black outlet pipe (7) is arranged on the side wall of one end, close to the waste gas outlet, of the separation box (1). According to the utility model, the waste gas filtering effect can be improved, and the centralized collection of carbon black particles is realized.

The utility model relates to the technical field of rubber decomposition, and discloses rotary type waste rubber cracking environment-friendly equipment which comprises a heating box, a rotary drum is movably connected to the middle of the heating box in a sleeved mode, an arc plate is fixedly installed on the left portion of the rotary drum, racks are fixedly installed on the inner side and the outer side of the arc plate respectively, and a fixing base is arranged on the left portion of the rotary drum. A motor is fixedly installed on the upper portion of the fixing base, an output shaft of the motor is movably connected with the fixing base in a sleeved mode, the output shaft of the motor is fixedly connected with a first gear in a sleeved mode, the first gear is located on the right side of the fixing base, the right portion of the fixing base is movably connected with a second gear in a sleeved mode through a shaft, and the outer edge of the second gear is meshed with the first gear. A moving ring is driven by a motor, an electromagnet is adjusted to enable the two sets of third gears to provide power back and forth, reciprocating rotation of the rotary drum is achieved, the flexibility of the rotary drum is improved, waste rubber is prevented from being heated unevenly, cracking is more sufficient, the reaction time is shortened, and the working efficiency of the device is improved.

This invention relates to a modified asphalt and its preparation method, comprising: (1) mixing styrene tar with a pretreatment solvent, allowing it to stand and separate into upper and lower liquid layers; (2) removing the pretreatment solvent from the upper and lower liquid layers respectively to obtain liquid phase Y1 and liquid phase Y2; (3) mixing waste rubber powder with liquid phase Y1 and reacting them, followed by solid-liquid separation to obtain solid phase G1, while simultaneously recovering the separated liquid phase Y3; (4) mixing solid phase G1 with liquid phase Y2 to obtain mixture G2; and (5) adding mixture G2 to the base asphalt to obtain modified asphalt. This invention pretreatment of hazardous waste styrene tar before its use as an additive improves the mixing effect of waste rubber powder and base asphalt, ensures product quality, realizes the resource utilization of styrene tar, and reduces production costs.

The application discloses a modular manhole cover based on waste recycling, which comprises a waste reinforcement mesh frame, a waste cover plate arranged on the upper part of the waste reinforcement mesh frame, a reflective warning layer arranged on the upper surface of the waste cover plate, waste rubber arranged on the outer periphery of the waste cover plate and the waste reinforcement mesh frame, a waste reinforcement handle arranged on the waste cover plate, a waste reinforcement hook arranged on the lower part of the waste reinforcement mesh frame, and a waste counterweight barrel hung on the waste reinforcement hook. The application has the advantages that the comprehensive utilization rate of waste is greater than or equal to 90%, construction waste is reduced, the modular design is convenient to assemble and disassemble, the size is flexible, the cover can be used for the protection of manholes with different sizes, the multiple protection mechanism is wind-resistant and stable, the waste on a construction site is utilized, material cost is saved, the maintenance cost is very low, the waste cover can be replaced locally when a wood plate or a rubber strip is damaged, the waste cover does not need to be scrapped as a whole, and the waste cover can be recycled repeatedly.

The utility model discloses a waste rubber crushing and screening device, which relates to the technical field of rubber crushing devices and comprises a support frame, a crushing box mounted at the top end of the support frame, a feeding hopper fixedly mounted at the top end of the crushing box, a discharging hopper fixedly mounted at the bottom end of the crushing box, and an impurity removing and screening mechanism communicated with the bottom end of the discharging hopper. Waste rubber is crushed into rubber particles through the crushing box, the rubber particles are subjected to efficient impurity removal treatment through a belt magnetic separator and a high-pressure air pipe in the impurity removal screening mechanism, impurities in the rubber particles are removed, and then grading treatment is conducted through a screen plate; according to the waste rubber processing device, the impurity removal efficiency in the waste rubber processing process can be effectively improved, the scraper blade is matched with high-pressure airflow to clean the lower surface of the belt conveyor, dust adhesion is effectively reduced, and the cleanliness of rubber is further guaranteed.

The application relates to the field of road engineering materials, and particularly discloses a highway disease repairing material and a repairing method. The repairing material comprises the following raw materials: SBS modified asphalt, waste rubber powder, tackifier, composite fiber stabilizer, mineral filler and reinforcing filler. The tackifier is epoxy acrylate resin, the composite fiber stabilizer comprises hydroxypropyl methyl cellulose and modified microcrystalline cellulose / talc powder compound. The modified microcrystalline cellulose / talc powder compound is prepared by the following steps: talc powder is treated by gamma-methacryloxypropyl trimethoxysilane and 3-allyloxy-2-hydroxy-1-propane sulfonic acid sodium salt, then mixed with microcrystalline cellulose, and then reacted with terephthalic acid and glycine. The repairing method comprises the following steps: removing redundant fragments; smearing tack layer oil, then mixing and paving the repairing material in a pit; rolling and leveling the highway pavement. The application has the characteristics of prolonging the service life of the repaired pavement.

This application discloses a high-weather-resistant and high-durability asphalt concrete and its preparation method. On one hand, this application provides a high-weather-resistant and high-durability asphalt concrete, wherein the weight proportions of its components include: 38-44 parts coarse aggregate, 18-24 parts fine aggregate, 8-12 parts ultrafine filler, 6-10 parts SBS modified asphalt, and 6-8 parts asphalt modifier; the weight proportions of the asphalt modifier include: 20-24 parts carboxymethyl chitosan microcapsules coated with aromatic oil repair agent, 6-10 parts waste rubber powder, 10-12 parts epoxy resin, 4-8 parts nano-silica, and 8-12 parts basalt short fibers. On the other hand, this application also provides a method for preparing the above-mentioned high-weather-resistant and high-durability asphalt concrete. This application has relatively low cost, can effectively improve low-temperature crack resistance and high-temperature rutting resistance, and has strong anti-aging properties and durability.

The invention discloses a high-solid-waste-content soft porcelain material suitable for pavements as well as raw materials and a preparation method thereof, and relates to the technical field of soft porcelain materials. The high-solid-waste-content soft porcelain material suitable for the pavement comprises a bottom-layer raw material and a surface-layer raw material, wherein the bottom-layer raw material comprises coupling-agent-modified rammed earth, a graphene-oxide-modified first emulsion, a second emulsion, water, a dispersing agent, a curing agent, a coalescing agent and a water reducing agent; the surface layer is prepared from the following raw materials: inorganic powder, modified rubber particles, graphene oxide modified first emulsion, second emulsion, water, a dispersing agent, a coupling agent, a curing agent, a coalescing agent and a water reducing agent. By adopting the raw material of the soft porcelain material provided by the invention, the accumulation of solid waste materials such as rammed earth, granite and waste rubber can be reduced, the multifunctionality of the soft porcelain material is increased, and the prepared soft porcelain material has the characteristics of hard bottom and soft and moist surface, can be applied to a road surface, and can be directly paved on the road surface after being prepared, so that the construction period is greatly shortened.

The invention discloses a method for co-processing waste incineration fly ash based on ultrafast carbon thermal reduction, organic solid wastes such as waste rubber and plastic are converted into graphene by utilizing high-voltage instantaneous current, and ultrafast carbon thermal reduction processing of the waste incineration fly ash is realized by utilizing excellent conductivity and reducibility of the graphene. According to the present invention, the waste incineration fly ash is subjected to detoxification so as to ensure the efficient and synchronous removal of the heavy metal and the dioxin in the waste incineration fly ash, the detoxified product is applied to the cement-based composite material so as to optimize the pore structure of the cement binder system and improve the hydration process, and the mechanical property of the building material product is improved, such that the harmless treatment and the resource utilization of the waste incineration fly ash are achieved. The material can be heated to over 3000 DEG C within an extremely short time, internal chemical bonds of the material in a non-equilibrium state are initiated to break and recombine, and evaporation removal of non-carbon elements such as heavy metal and thermal degradation of dioxin are promoted. And the environmental risk of the waste incineration fly ash is remarkably reduced, and co-treatment of the waste incineration fly ash, waste rubber and plastic and other high-carbon organic solid waste can be achieved.

The application provides a high-strength rubber mortar material and a preparation method thereof, and belongs to the technical field of rubber mortar. According to the weight parts, the raw materials include cement 80-120 parts, sand 240-350 parts, water 50-65 parts, water reducing agent 0.5-1 part, and alkaline microbeads 1-12 parts. The shell material of the alkaline microbeads includes chitosan 18-22 parts, polyvinylpyrrolidone 0.1-1 part, emulsifier 1-3 parts, water 18-22 parts, and acetic acid 18-22 parts. The core material includes initiator 0.1-1 part, rubber powder 1-3 parts, emulsifier 0.5-2 parts, water 18-22 parts, and acetic acid 18-22 parts. The rubber is wrapped in the shell of the microbead, so that the rubber powder can be prevented from agglomerating during the preparation of the mortar. The emulsion is prepared by using ultrasonic waves, the porosity of the mortar is effectively reduced, the problem that the rubber powder affects the hydration of cement is solved, the strength of the rubber mortar product is improved, and the recycling of waste rubber is realized.

The invention relates to the technical field of recycling of high polymer materials and blending modification of elastomers, and discloses a preparation method of thermoplastic vulcanized rubber for automobile sealing strips based on waste EPDM (Ethylene-Propylene-Diene Monomer) modification, which comprises the following steps: carrying out high-shear mixing and pre-swelling on waste EPDM rubber powder, liquid high vinyl polybutadiene and a peroxide initiator to obtain a system A; uniformly mixing the primary polypropylene, the primary ethylene propylene diene monomer and the bridging agent dry powder master batch to obtain a system B; synchronously adding the system A and the system B into a main feeding hole of a double-screw extruder for melt blending and dynamic vulcanization reaction; the first antioxidant and the second antioxidant are mixed into a system C, the system C is pressed in through a side feeding opening for blending after dynamic vulcanization, devolatilization and pelletizing are conducted, and the thermoplastic vulcanized rubber is prepared. According to the invention, liquid high-vinyl polybutadiene and a peroxide initiator are adopted to carry out high-shear pre-swelling on the waste ethylene-propylene diene rubber powder, so that reactive alkadiene permeates into micropores of the waste rubber powder, and an interpenetrating network is formed through in-situ cross-linking polymerization during subsequent extrusion and heating.

This invention provides a photocatalytically modified asphalt based on waste rubber powder and its preparation method. The modified asphalt achieves this by precisely controlling the ratio of waste rubber powder, matrix asphalt, and a smoke suppressant made of graphite-phase carbon nitride. Simultaneously, a segmented gradient temperature-controlled calcination process is employed to prepare graphite-phase carbon nitride with a specific band gap. This ensures good interfacial compatibility among the raw material components, stable system formulation, and uniform and controllable precursor pyrolysis and polymerization reactions. Consequently, the graphite-phase carbon nitride possesses both porous physical adsorption and visible light photocatalytic activity. This allows for efficient adsorption and long-lasting photocatalytic degradation of asphalt fumes while fully preserving the excellent road performance and workability of the waste rubber powder-modified asphalt. The final product is a photocatalytically modified asphalt with simple components, controllable cost, excellent compatibility, long-lasting and stable smoke suppression effect, good process repeatability, and suitability for industrial mass production and widespread application in highway pavement engineering.