413 results about "Waste rubber" patented technology

The invention discloses sound-insulation and heat-insulation building mortar and a preparation method thereof, and relates to the technical field of building materials, the sound-insulation and heat-insulation building mortar comprises, by weight, 42-48 parts of a cementing material, 15-25 parts of an auxiliary material, 17-22 parts of lightweight aggregate, 30-35 parts of a functional filler, and 1-2 parts of an additive; the cementing material is a mixture of sulphoaluminate cement and Portland cement; the auxiliary material is a mixture of fly ash and quartz sand, the lightweight aggregate is a mixture of 20-40-mesh hollow vitrified microbeads and 70-90-mesh hollow vitrified microbeads, and the mass ratio of the hollow vitrified microbeads to the hollow vitrified microbeads is 1: (2-3); the functional filler is a mixture of modified waste rubber particles and modified fibers; the additive is a mixture of a polycarboxylate superplasticizer and hydroxypropyl methyl cellulose ether. The mortar disclosed by the invention is good in thermal insulation performance and excellent in mechanical property, the method disclosed by the invention is simple to operate and low in cost, and the prepared mortar is excellent in performance.

The invention discloses ceramsite lightweight aggregate structural concrete and a preparation method thereof, and belongs to the technical field of concrete. The ceramsite lightweight aggregate structural concrete is prepared from the following raw materials in parts by mass: 240 to 270 parts of cement, 25 to 35 parts of mineral powder, 80 to 95 parts of fly ash, 210 to 250 parts of coal gangue crushed materials, 725 to 805 parts of modified coal gangue ceramsite, 10 to 30 parts of waste rubber materials, 3.5 to 5 parts of water reducing agents and 165 to 180 parts of water. The modified coal gangue ceramsite is obtained by coating the surface of a coal gangue ceramsite matrix with an epoxy resin layer and then grafting a hydrophilic polymer, the porosity of the coal gangue ceramsite matrix is 40-60%, and the aperture ratio is 1.5-6%. The epoxy resin layer on the surface of the modified coal gangue ceramsite provides an anti-permeability barrier, the hydrophilic polymer on the surface adjusts the wettability of the ceramsite, the binding force with other components of the concrete is improved, and the concrete has excellent shrinkage and dry crack resistance.

The present invention discloses a pyrolysis oil and gas cutting device and method, comprising a waste rubber pellet pyrolysis module, a pyrolysis oil and gas high-efficiency cutting module, a pyrolysis oil and gas condensation module, a Roots blower, a non-condensable gas pressure-stabilizing and conveying module, and a control module. By spraying cooling water and circulating non-condensable gas onto the high-temperature pyrolysis oil and gas, the present invention utilizes the vaporization of the cooling water to absorb a large amount of latent heat of phase change, fully condensing the high-temperature pyrolysis oil and gas. Furthermore, the generated water vapor and non-condensable gas reduce the partial pressure of low-flash-point components in the oil and gas, causing them to continuously migrate from the liquid phase to the gas phase. While ensuring that the oil product flash point meets standards, the minimum flash point cutting temperature required for condensation of high-flash-point oil is lowered, thereby increasing the yield of high-flash-point oil.

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 paper conveying, in particular to a stacking, forming and assembling mechanism for paper preparation and conveying, which comprises a machine main body, a conveying roller is rotatably connected in the machine main body, the conveying roller comprises end plates rotatably connected with the inner wall of the machine main body, and a roller body is fixedly connected between the end plates. A rolling shaft with the two ends rotationally connected with the end plates is arranged in the roller body, a rubber layer is wound on the surface of the rolling shaft, an opening is formed in the bottom of the roller body, an auxiliary shaft is rotationally connected to one side in the opening, and a turning plate is hinged to the other side in the opening. The rolling shaft is arranged in the roller body of the conveying roller to roll the rubber layer, the bottom opening is matched with the turning plate and the first spring buffer, fixing and replacing of the rubber layer are facilitated, the first telescopic rod, the rolling shaft, the clamping opening, the electromagnet and the first clamping plate of the rolling mechanism cooperate, the waste rubber layer is rapidly recycled, a new layer is pulled out, shutdown is reduced, and the effects of improving efficiency and reducing cost are achieved.

The invention relates to OCA die cutting equipment and technology, and relates to the technical field of OCA die cutting equipment and technology, the OCA die cutting equipment and the OCA die cutting technology are included, and the OCA die cutting equipment and the OCA die cutting technology are sequentially subjected to the steps of selecting an OCA optical cement material and a release film, checking all parts of a die cutting machine and checking whether the equipment runs stably or not; the method comprises the following steps: loading an OCA (Optical Clear Adhesive) coiled material onto a die-cutting machine through an automatic feeding device, and slitting the OCA material; carrying out die cutting on the OCA optical cement material; in the die cutting process, a negative-pressure adsorption type waste discharging device is adopted to absorb and remove waste rubber part; the OCA optical cement material is sliced; carrying out quality inspection on the sliced OCA material; the inspected product is packaged; a complete product is produced through a complete die cutting process; through the complete die cutting process, a complete product is produced, the situation that the product subjected to die cutting slightly deforms can be avoided, when the product is detected, the detection error is large easily, and smooth die cutting and the qualified rate of the product are guaranteed.

The application relates to the technical field of pavement materials, and particularly discloses a high-strength asphalt-based pavement material and a preparation method and application thereof. The high-strength asphalt-based pavement material comprises the following raw material components in mass fractions: waste rubber powder 60-80 parts, base asphalt 20-50 parts, sodium lignosulfonate modified petroleum resin 10-20 parts, deacidified waste oil 5-15 parts and solid filler 20-30 parts; wherein the raw material components of the solid filler comprise furan resin glass fiber reinforced material, cement kiln dust, blast furnace slag and coal gangue powder. The high-strength asphalt-based pavement material provided by the application has excellent road performance, can maintain good stability at low temperatures, is not prone to cracking, the raw material components are cheap and easy to obtain, the preparation cost is low, and the treatment pressure of solid waste can be effectively relieved.

The invention provides a waste rubber and plastic pyrolysis system and application thereof.The waste rubber and plastic pyrolysis system comprises a feeding unit comprising a feeding bin, a material conveying mechanism and an anaerobic protection mechanism, a pyrolysis reaction unit comprising a first-stage pyrolysis reactor and a second-stage pyrolysis reactor, and each pyrolysis reactor at least comprises a heating cavity, a material conveying device and a heating source; the heating cavity provides a closed high-temperature environment under the action of the heating source, the material conveying mechanism pushes materials in the heating cavity in the preset direction, and an outlet of the first-stage pyrolysis reactor communicates with an inlet of the second-stage pyrolysis reactor, so that the materials sequentially pass through the first-stage pyrolysis reactor and the second-stage pyrolysis reactor to be subjected to multi-stage pyrolysis. The product recycling structure comprises a pyrolysis gas purifying and condensing device, the pyrolysis gas purifying and condensing device is connected with the second-stage pyrolysis reactor, and by applying the technical scheme, the technical problem that in the prior art, waste rubber and plastic pyrolysis and equipment carbon residue treatment are difficult can be effectively solved.

The invention discloses basalt fiber reinforced low-carbon environment-friendly asphalt and a construction method of the basalt fiber reinforced low-carbon environment-friendly asphalt on a high and cold road surface, and relates to the technical field of road engineering. The basalt fiber is subjected to ultrasonic treatment by a silane coupling agent KH-550 hydrolysate and dried, and the low-carbon additive is prepared from waste rubber powder and biological asphalt and is matched with an anti-stripping agent; adding biological asphalt, stirring at a high speed, adding basalt fibers in three times, stirring at a high speed, and finally adding an anti-stripping agent to prepare an asphalt composition; adding an asphalt composition for wet mixing, and then adding fibers for continuous mixing to obtain a mixture; after the lower bearing layer is preheated, a crawler-type paver paves at the temperature of 155-165 DEG C, and the speed and the loose paving coefficient are controlled; initial pressing, re-pressing and final pressing are carried out, and a double-steel-wheel and rubber-wheel road roller is used for rolling according to the temperature and the speed; and after compaction, the heat-insulating tarpaulin is covered. The low-temperature crack resistance and freeze-thaw resistance of the basalt fiber reinforced asphalt, the carbon emission reduction of the waste rubber powder and the biological asphalt and the construction quality guarantee through dynamic temperature control and intelligent compaction are realized, and the construction method is adaptive to the alpine regions and meets the requirements of green road construction.

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 invention discloses a multifunctional foam pad made of a regenerated composite material and a production process of the multifunctional foam pad, and belongs to the technical field of production of regenerated composite materials. The surface of the recycled PET non-woven fabric printing layer is provided with 50 + / -5 [mu] m micropores, the cat palm bionic gradient foaming layer (the density is 0.15-0.35 g / cm < 3 > gradient distribution) is formed by blending and foaming PVC recycled materials, PET bottle chips and waste rubber powder, and the glass fiber net reinforced rubber matrix layer and the triangular pyramid micro-sucker bottom layer are arranged from top to bottom. The preparation process comprises the steps of waste material near-infrared sorting and pretreatment, multi-stage dynamic blending granulation, supercritical CO2 gradient foaming, bionic calendaring forming and laser positioning hot-pressing compounding, high-valued utilization of multi-element waste materials is achieved through combination of bionic structure design and a green process, the product has sound insulation, buffering and anti-skid performance, the tear resistance is improved by 150%, and the service life of the product is prolonged. The problems that a traditional foaming cushion depends on raw plastic, is single in function and causes manufacturing pollution are solved, and resource circulation and function strengthening unification are achieved.

The invention provides an upgrading and purifying method for waste tire pyrolysis carbon black, and belongs to the technical field of upgrading, purifying and high-value utilization of waste tires and waste rubber pyrolysis carbon black. The upgrading and purifying method comprises the following steps: carrying out wet magnetic separation on waste tire pyrolysis carbon black to obtain pyrolysis carbon black subjected to magnetic separation; mixing the cracked carbon black subjected to magnetic separation with hydrobromic acid for acid leaching to obtain first acid leaching filtrate and a first carbon black product; adding zinc particles into the first acid leaching filtrate to obtain second filtrate; evaporating and crystallizing the zinc bromide solution to obtain zinc bromide; zinc bromide is prepared into heavy liquid, the first carbon black product is subjected to reselection, and a pure carbon black product and silicon dioxide tailings are obtained; introducing hydrogen sulfide gas into the ferric ion solution for purification and absorption to obtain sulfur and a third filtrate; and the third filtrate is subjected to electrolytic regeneration, and a regenerated ferric ion solution and hydrogen are obtained after electrolytic regeneration is finished. According to the method, the acid leaching byproduct zinc bromide is used as a reselection medium, and resource recycling is achieved while efficient separation and impurity removal are achieved.

The invention relates to the technical field of pavement materials, and particularly discloses a high-strength asphalt-based pavement material as well as a preparation method and application thereof. The high-strength asphalt-based pavement material is prepared from the following raw material components in parts by mass: 60 to 80 parts of waste rubber powder, 20 to 50 parts of matrix asphalt, 10 to 20 parts of sodium lignin sulfonate modified petroleum resin, 5 to 15 parts of deacidified waste grease and 20 to 30 parts of solid filler, wherein the solid filler comprises the following raw material components: a furan resin glass fiber reinforced material, cement kiln ash, blast furnace slag and coal gangue powder. The high-strength asphalt-based pavement material provided by the invention has excellent pavement performance, can keep good stability at low temperature, is not easy to crack, is low in raw material components and easy to obtain, is low in preparation cost, and can also effectively relieve the treatment pressure of solid wastes.

The invention relates to the technical field of pavement materials, and particularly discloses an all-solid waste asphalt mixture as well as a preparation method and application thereof. The all-solid waste asphalt mixture is prepared from the following raw material components: activated waste rubber powder, waste rubber powder modified emulsified asphalt, a waste asphalt-based pavement material, aggregate, a fiber material and an additive, wherein the aggregate comprises coal gangue powder, waste magnesia carbon brick powder, nut shell powder, coarse aggregate, steel slag powder and fine aggregate; the fiber material comprises activated aramid fiber and waste rubber powder modified glass fiber reinforced plastic fiber; the additive comprises a smoke suppression viscosity reducer and a styrene-butadiene-styrene block copolymer. The all-solid waste asphalt mixture with excellent pavement performance is prepared by utilizing the synergistic effect of all the component raw materials, and the problem that the pavement performance of an asphalt regenerated mixture is poor due to the fact that existing solid waste is poor in compatibility with other components when being applied to the asphalt regenerated mixture is effectively solved.

The invention relates to the technical field of pavement materials, in particular to an all-solid-waste imitation asphalt material as well as a preparation method and application thereof. The all-solid-waste asphalt-imitating material is prepared from the following raw material components: waste rubber powder, waste plastics, kitchen waste grease, waste petroleum resin and waste filler, wherein the waste filler is prepared from the following raw material components in percentage by mass: 20 to 30 percent of waste glass fiber, 15 to 20 percent of straw residue, 15 to 20 percent of spent bleaching clay and the balance of coal gangue powder. The all-solid-waste asphalt-imitating material provided by the invention has excellent pavement performance, and the raw material components are wastes, so that the preparation cost is low, the raw material components are easy to obtain, and the treatment pressure of the wastes can be effectively relieved. According to the technical scheme, the problems that in the prior art, the preparation cost of an imitated asphalt material is high, and the material performance cannot reach the traditional asphalt level, so that the mechanical performance of an imitated asphalt mixture prepared from the imitated asphalt material is poor are effectively solved.

The invention belongs to the technical field of biomass and solid waste resource utilization, and particularly relates to a biomass activated waste rubber powder material and a preparation method and application thereof. Biomass, acetic acid and water are mixed, a reaction mixture is obtained through a hydrothermal reaction and acetone flushing, a moisture-containing biochar solid and a bio-oil-containing liquid are obtained through vacuum filtration, the moisture-containing biochar solid is dried to obtain biochar, a part of biochar is selected to be ground and dialyzed to obtain biomass carbon dots, and the biomass carbon dots are prepared into biomass carbon dots. Drying the liquid containing the bio-oil to obtain the bio-oil; mixing the obtained bio-oil, biochar, biomass carbon dots and waste rubber powder, and performing microwave activation to obtain biomass activated waste rubber powder. The regenerated asphalt can be obtained by doping the biomass activated waste rubber powder into the waste asphalt. The method provided by the invention can greatly reduce the stockpiling amount of biomass, waste tires and waste asphalt mixtures, improve the ecological environment of the expressway and reduce carbon emission, and has important significance for popularization and application of multi-source solid wastes in highway engineering.

The invention relates to the technical field of asphalt pavement materials, and provides a preparation method of low-temperature rubber composite modified asphalt, which comprises the following steps: modifying matrix asphalt, adding vulcanized rubber powder, a network building agent and a cross-linking agent, uniformly stirring, and shearing at a high speed; carrying out swelling development after shearing is completed, then adding a plasticizer, and uniformly stirring to obtain rubber modified asphalt; and adding the premixed composite warm mixing agent into the rubber modified asphalt, and shearing to obtain the warm mixing type rubber composite modified asphalt. By combining a dual viscosity reduction mechanism of porous adsorption of the warm-mixing material A and microcrystalline lubrication of the warm-mixing material B, the mixing amount of the waste rubber is remarkably increased, performance degradation caused by high-temperature desulfurization is avoided, and the technical problem that the construction workability and pavement performance of the warm-mixing rubber asphalt are difficult to consider at the same time is effectively solved.

The invention provides a method for preparing anti-permeation anti-corrosion filler by using waste rubber and anti-corrosion paint, and belongs to the technical field of paints.The method comprises the steps that the waste rubber is smashed and sieved to obtain rubber particles, then the rubber particles are sequentially subjected to acid pickling, alkali washing and water washing and dried, then the rubber particles are added into tetrachloroethylene to be chlorinated, flocculent products are removed through an air blowing rotary furnace, and the anti-permeation anti-corrosion filler is obtained; and adding the rubber particles into tetrachloroethylene again for chlorination, carrying out bubbling operation, and draining to obtain the anti-permeation and anti-corrosion filler. The chlorine content of the impermeable anticorrosive filler prepared by the method is increased, the corrosion resistance is enhanced, and an anticorrosive coating prepared from the filler can effectively solve the problem of diffusion of water molecules, also can effectively inhibit permeation and migration of corrosive medium chloride ions, and can greatly improve the impermeability.

The invention discloses a method for modifying asphalt by desulfurizing waste rubber powder through a ternary eutectic solvent, and belongs to the technical field of preparation of modified asphalt. The invention aims to solve the problem that a safe and rapid desulfurization method for destroying the cross-linked structure of the waste rubber powder, enhancing the interaction between the waste rubber powder and asphalt and improving the storage stability of the waste rubber powder modified asphalt is lacked in the prior art. The method comprises the following steps: 1, preparing a ternary eutectic solvent; 2, desulfurizing the waste rubber powder by using a ternary eutectic solvent; and 3, preparing the modified asphalt. The method is used for the ternary eutectic solvent desulfurization waste rubber powder modified asphalt.

The invention discloses an environment-friendly red mud-based solid waste cementing material and a preparation method thereof, and belongs to the technical field of solid waste recycling. The environment-friendly red mud-based solid waste cementing material is prepared from the following raw materials: modified red mud, slag, gypsum, ceramic waste and an exciting agent. The red mud is synergistically modified by utilizing the rubber powder and the fly ash in a specific ratio, the curing effect of soluble sodium can be remarkably improved, meanwhile, the activity of aluminosilicate substances in the red mud can be effectively promoted, and the gelling activity of the red mud is improved. Various solid wastes (rubber powder obtained by grinding red mud and waste rubber, ceramic waste and slag) are added into the prepared cementing material, so that resource recycling of the various solid wastes can be realized. The prepared cementing material has high mechanical strength, the 28d breaking strength of the cementing material can reach 15.4 MPa to the maximum, the 28d compressive strength of the cementing material can reach 58.4 MPa to the maximum, and the preparation process is simple and suitable for large-scale application and popularization.

The invention discloses waste rubber-plastic composite modified asphalt as well as a preparation method and application thereof, and relates to the technical field of modified asphalt materials, the waste rubber-plastic composite modified asphalt comprises the following components in parts by weight: 90-115 parts of matrix asphalt, 30-45 parts of a modified rubber-plastic composite material, 1-5 parts of naphthenic rubber oil and 0.2-0.7 part of sulfur. According to the invention, a CO2 supercritical fluid carrying ionic liquid swelling treatment process and a microwave plasma treatment process are mainly adopted to carry out combined synergistic treatment on the rubber-plastic mixture, so that the problem that the storage stability, the temperature resistance and the like of the rubber-plastic mixture in asphalt are obviously reduced due to overhigh doping content is effectively solved; on the premise of ensuring that the performance of the asphalt required by the road engineering material meets the standard, the recycling rate of the waste rubber powder and the waste plastic is remarkably improved, and a new means is provided for preparation of the modified asphalt and cyclic utilization of waste resources.

The invention discloses a preparation method of high molecular weight waste rubber powder carboxylation modification and dynamic cross-linked rubber, and belongs to the technical field of high molecular weight waste rubber powder carboxylation modification and dynamic cross-linked rubber preparation. The preparation method comprises the following steps: S1, dispersing high-molecular-weight waste rubber powder in a solvent, adding acrylic acid and an initiator, and heating and stirring to obtain carboxylated waste rubber powder; s2, plastifying the matrix rubber on an open mill for roll coating, adding the carboxylated waste rubber powder in batches, and adding a cross-linking agent and an anti-aging agent at the same time to obtain masterbatch; s3, putting the master batch into an internal mixer, raising the temperature of the master batch to a preset dynamic crosslinking temperature, adding sulfur, an accelerant and other vulcanizing aids, and vulcanizing. Compared with the prior art, reversible chemical bonds can be formed at the interface of rubber powder particles and matrix rubber, and the chemical bonds can be temporarily broken during high-temperature processing and can be re-formed after cooling, so that the strength and the elasticity of the material are recovered.

The invention discloses high-weather-resistance and high-durability asphalt concrete and a preparation method thereof. On one hand, the invention provides the asphalt concrete with high weather resistance and high durability, and the asphalt concrete is prepared from the following components in parts by weight: 38 to 44 parts of coarse aggregate, 18 to 24 parts of fine aggregate, 8 to 12 parts of superfine filler, 6 to 10 parts of SBS (Styrene Butadiene Styrene) modified asphalt and 6 to 8 parts of asphalt modifier; the asphalt modifier is prepared from the following components in parts by weight: 20 to 24 parts of carboxymethyl chitosan microcapsules coated with an aromatic hydrocarbon oil repairing agent, 6 to 10 parts of waste rubber powder, 10 to 12 parts of epoxy resin, 4 to 8 parts of nano silicon dioxide and 8 to 12 parts of basalt short fibers. On the other hand, the invention further provides a preparation method of the high-weather-resistance and high-durability asphalt concrete. According to the present invention, the cost is relatively low, the low-temperature crack resistance and the high-temperature rutting resistance can be effectively improved, and the anti-aging performance and the durability are strong.

The invention discloses a basalt fiber reinforced asphalt mixture based on solid waste synergy and a preparation method of the basalt fiber reinforced asphalt mixture, and belongs to the field of asphalt mixtures. The basalt fiber reinforced asphalt mixture based on solid waste synergy is prepared from the following raw material components in parts by mass: 1000 to 1200 parts of aggregate, 3 to 5 parts of modified basalt fiber, 50 to 73 parts of waste rubber modified asphalt, 2 to 4.38 parts of amphiphilic epoxy resin, 0.7 to 1.5 parts of curing agent and 0.06 to 0.13 part of accelerant, the modified basalt fiber is obtained by modifying triethoxysilyl butyraldehyde, 3-mercaptopropyltrimethoxysilane and allyl-1, 3-sultone, and the modified basalt fiber is prepared by modifying the triethoxysilyl butyraldehyde, the 3-mercaptopropyltrimethoxysilane and the allyl-1, 3-sultone; the amphiphilic epoxy resin is obtained by reacting dodecyl succinic anhydride, polyethylene glycol monomethyl ether 2000 and epoxy resin; m-phenylenediamine and 2-amino-4-cyanopyridine are adopted as the curing agent; n-methylimidazole is adopted as the accelerant; the asphalt mixture prepared by the invention has good rut resistance, crack resistance and water stability.

The invention belongs to the technical field of asphalt processing, and discloses high-viscosity rubber modified asphalt and a preparation method thereof.The high-viscosity rubber modified asphalt is prepared from 70 # matrix asphalt, graded vulcanized rubber powder, a linear SBS polymer, C5 petroleum resin type terpene resin, cycloalkane oil, polyisobutene modified nano-zinc oxide and a sulfur cross-linking stabilizer; by combining a three-dimensional network structure formed by the cross-linking stabilizer, the layering risk caused by density difference is remarkably reduced, the factory production and transportation period is prolonged, the anti-aging performance is further improved through the synergistic effect of the nanometer material and vulcanization, the asphalt is endowed with better elastic recovery and anti-fatigue capacity, and the service life of the asphalt is prolonged. And the whole formula breaks through the limitation of the mixing amount of the traditional rubber powder, the fluidity of the mixture is optimized while the high viscoelastic characteristic is ensured, the problems of wheel sticking during paving and non-uniform void ratio are solved, the construction efficiency and the pavement durability are considered, and the efficient cyclic utilization of waste rubber resources is promoted.

The invention discloses a rubber recovery method and heat-resistant reclaimed rubber. The rubber recovery method specifically comprises the following steps: 1) recovering rubber to prepare modified SBR (Styrene Butadiene Rubber) master batch; 2) a preparation method of heat-resistant reclaimed rubber; the preparation method comprises the following steps: firstly, desulfurizing crushed colloidal particles by using ozone to generate active functional groups, then esterifying and grafting 4-bromonaphthol to obtain a modified SBR master batch, banburying and vulcanizing the modified SBR master batch, and carrying out nucleophilic substitution on bromine by a vulcanizing agent to form a cross-linked network. By modifying the waste styrene-butadiene rubber and reconstructing a molecular cross-linked network of the rubber, the mechanical property and the thermal stability of the reclaimed rubber are greatly improved, particularly, the heat resistance reaches the level of native styrene-butadiene rubber, and the method is an optimal scheme for recycling the waste rubber.

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.

The utility model relates to the technical field of waste rubber regeneration, in particular to a mixing device for devulcanizing and plasticizing waste rubber, which comprises a mixing barrel, a crushing and stirring component rotatably arranged in the mixing barrel, a driving component vertically and slidably arranged on the mixing barrel, and a lifting component arranged on the mixing barrel and positioned below the driving component, the driving assembly is in transmission connection with the crushing and stirring assembly, the driving assembly drives the crushing and stirring assembly to rotate, the lifting assembly is connected with the driving assembly, and the lifting assembly drives the driving assembly to vertically slide; the motor drives the transmission shaft to rotate so as to drive the crushing cutter arranged at the upper part of the filter screen to crush the waste rubber raw material again, so that the situation that some waste rubber fragments which are not crushed thoroughly influence and reduce the quality and performance stability of regenerated rubber is prevented; an electric push rod is started to drive a moving plate to move upwards, and then a transmission shaft connected through a synchronous rod is driven to move upwards, so that the filter screen is moved to the outside of the mixing barrel, and a worker can conveniently clean the filter screen.