526 results about "Crumb 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 provides a leakage point pressure difference response high-strength blocking agent based on iron ion dynamic cross-linked latex and a preparation method thereof, and the raw materials comprise the following components in parts: 60-120 parts of latex, 60-120 parts of deionized water, 5-15 parts of an activator, 5-10 parts of a defoamer, 100 parts of a terminator, 100 parts of a stabilizer, 10 parts of a 20% ferric chloride solution, and the balance of water. Rubber particles are dynamically crosslinked through ferric ions, and the plugging strength is remarkably improved. Compared with a traditional differential pressure plugging agent, the plugging strength for small holes with the diameter of 0.5 mm reaches 35.67 MPa and is improved by about 238%, and the plugging strength for large holes with the diameter of 1 mm reaches 9.68 MPa and is improved by about 428%. And the plugging device is suitable for plugging conditions with higher leakage point pressure difference. In addition, the plugging agent can realize rapid and high-strength plugging of an underground pipe column, and provides a more efficient and more reliable solution for well site construction.

The invention discloses a rubber modified asphalt product and a preparation method thereof. The rubber modified asphalt product comprises the following raw materials in parts by weight: 55-60 parts of base asphalt, 15-20 parts of rubber particles, 12-14 parts of a hybrid-based modified filler, 8-11 parts of aromatic oil, 5-8 parts of an additive, 2-3 parts of microcrystalline wax, 2-3 parts of a silane coupling agent and 2-4 parts of an antioxidant. According to the rubber modified asphalt product disclosed by the invention, the base asphalt is matched with the rubber particles, the aromatic oil, the microcrystalline wax, the silane coupling agent and the antioxidant to serve as functional aids, and meanwhile, the hybrid-based modified filler and the additive are added to serve as synergists, so that the base asphalt and the additive are coordinated to achieve a synergistic effect and jointly achieve a synergistic effect; the obtained modified asphalt product has harmonious improvement on elastic recovery, track dynamic stability and bending strain, and also has remarkable water resistance, ultraviolet resistance and cold and heat resistance stability effects.

The invention discloses an anti-skid and noise-reduction multifunctional road hot melt coating and a gradient forming process thereof, and relates to the technical field of hot melt coatings. Comprising the following components in percentage by mass: 25-28wt% of bio-based resin, 8-12wt% of a noise reduction material, 15-20wt% of nano composite rubber particles and 5-8wt% of internally mixed reflective glass beads. The bio-based resin is used as a base material of the hot melt coating, the superfine bamboo fibers and the polyurethane elastomer are combined to serve as noise reduction materials, and honeycomb-shaped pores with the diameter of 0.1-1 micron exist in the superfine bamboo fibers, so that a coating produced by construction of the hot melt coating has good noise reduction performance; meanwhile, coarse-grade glass beads and fine-grade glass beads are introduced into the material, the coarse-grade glass beads provide basic light reflection, gaps are filled with the fine-grade glass beads to form a compact reflection layer, the coarse-grade glass beads and the fine-grade glass beads synergistically act to enable incident light to generate a composite effect of diffuse reflection and specular reflection, the retroreflection coefficient of the coating is increased by utilizing the effect, the light reflection performance in rainy days is further improved, and the safety is improved; and the hot-melt coating mostly adopts an environment-friendly material, is easy to degrade and is beneficial to environment protection.

The invention discloses a waste rubber sealing element recovery treatment all-in-one machine, and relates to the technical field of waste recovery, the waste rubber sealing element recovery treatment all-in-one machine comprises a treatment box, the outer wall of the front side of the treatment box is fixedly connected with a feeding hopper, the inner wall of the treatment box is fixedly connected with a sieve plate, and the outer wall of the front side of the treatment box is provided with a discharge port corresponding to the sieve plate. When the rubber sealing element is processed, the first driving motor drives the roller to rotate, rubber particles are screened through the screen holes, the particles meeting the size are thrown out, the particles which do not meet the standard are taken back through the blocking plate to be smashed again, the particle size uniformity is ensured, meanwhile, the knocking block is matched with the triggering rod, the sealing element accurately falls onto the smashing roller, deviation is avoided, and the screen holes are prevented from being blocked. And in addition, an inner gear ring and a third gear synchronously drive a rotating rod to rotate, a power-on guide column is matched with a magnetic attraction ring, the magnetic attraction ring moves in a reciprocating mode to attract metal impurities, the impurities fly into a magnetic collecting barrel after power failure, and the impurity removal efficiency and the rubber recovery purity and quality are improved.

According to the caisson wharf and the construction method thereof, a layered structure of a steel slag-rubber particle composite lower layer and a regenerated resin-basalt fiber composite upper layer is adopted for a base, and interface bonding is enhanced in combination with a silane coupling agent; the foundation bed is assembled by precast concrete modules and is poured by nano mortar; the caisson main body is provided with a positioning plate which is inserted into the guide groove, the caisson main body is filled with multi-graded steel slag fragments, and an independent airbag cavity is pre-buried in a bottom plate; the buoyancy control system dynamically adjusts the water injection rate based on multi-sensor data; the ecological permeable pipeline network adopts a diatomite-zeolite coating; the prestressed steel strand towing system is regulated and controlled in real time through the friction damper. The caisson wharf and the construction method thereof have the remarkable advantages in the aspects of structural stability, ecological friendliness, construction efficiency, intelligence and automation, the problems existing in a traditional caisson wharf can be effectively solved, and the requirements of modern port construction are met.

The invention relates to the field of concrete, and particularly discloses anti-crack concrete and a preparation method thereof. The anti-crack concrete is prepared from the following raw material components in parts by weight: 400 parts of cement; 1000 to 1100 parts of coarse aggregate; 730 to 800 parts of fine aggregate; 40 to 50 parts of modified rubber particles; 20 to 25 parts of basalt fiber; 5-6 parts of a water reducing agent; 1.3 to 1.5 parts of SAP resin; 0.015 to 0.02 part of an air entraining agent; 130 to 140 parts of water; a modifier used for preparing the modified rubber particles is sodium hydroxide and a silane coupling agent. The anti-crack concrete disclosed by the invention has good anti-crack capability, the total cracking area does not exceed 35mm < 2 > / m < 2 >, and the 28d compressive strength is not lower than 40MPa.

The invention relates to a process for devulcanizing a vulcanized rubber mixture, comprising the following steps: A) providing or producing a vulcanized rubber mixture, B) comminuting the vulcanized rubber mixture to a granular material composed of vulcanized rubber particles, where the vulcanized rubber particles have a maximum particle diameter of 100 mm, C) extruding the vulcanized rubber particles produced in step B) in a twin-screw extruder at a shear rate of less than 100 s−1, where the temperature of the vulcanized rubber particles during extrusion is less than 200° C., to give a devulcanized rubber mixture having a temperature above 100° C., D) cooling the devulcanized rubber mixture in a further kneading unit, so as to give a devulcanized rubber mixture having a temperature in the range from 50° C. to 100° C. The invention further relates to an apparatus for performing the process and to the use of the apparatus for devulcanization of a vulcanized rubber mixture.

The invention relates to the technical field of rubber pelletizing, and particularly discloses a pelletizer for rubber processing, which comprises a rack, a hobbing cutter I, a hobbing cutter II and a spreading mechanism, the spreading mechanism comprises a material distribution roller, a material distribution part and a material supply part, the material distribution roller is rotatably arranged on the rack, and a plurality of partition plates are uniformly arranged on the peripheral side of the material distribution roller along the circumferential direction; a material containing cavity used for containing talcum powder is formed between any two adjacent partition plates, the outer sides of the partition plates can be tangent to the periphery of the second hobbing cutter, the material distributing roller and the second hobbing cutter synchronously and reversely rotate, the material distributing piece comprises a plurality of material distributing plates and a first driving structure, and each material distributing plate slides in the radial direction of the material distributing roller and is located in the corresponding material containing cavity. The material supply part is used for conveying talcum powder into each material containing cavity in the rotating process of the material distribution roller; by means of rotation of the material distribution roller and radial sliding of the material distribution piece, talcum powder covers the surfaces of cut rubber particles to form an isolation layer, and the adjacent particles are effectively prevented from adhering to one another.

The application discloses a kind of solution polybutadiene rubber particle conveying devices, it is related to conveying technical field, including belt conveyor, and belt conveyor is provided with distributing device and discharging device, and discharging device is located above distributing device, discharging device can quantitatively release rubber particles, and the discharge port of discharging device is provided with multilayer mouth structure, and the outside of multilayer mouth structure is connected with multidirectional traction structure, the present application is quantitatively filled with rubber particles by discharging device and releases, and the released rubber particles are layered and buffered by multilayer mouth structure Release, avoid the direct impact of rubber particles on belt conveyor, resulting in ejection to outside, reduce the waste of rubber particles, and the width of internal communication of multilayer mouth structure is expanded by multidirectional traction structure traction, so that the width of internal communication of multilayer mouth structure is larger, so as to avoid the blockage of rubber particles on discharging device and multilayer mouth structure.

The invention provides a multi-source dynamic disturbance rockburst combined support prevention and control system and method, and relates to the technical field of rockburst disaster prevention and control, the system comprises stress release holes, wave-absorbing grouting holes, energy-absorbing anchor rods and a passive pressure-bearing structure; the stress release holes are formed in a rockburst high-risk area of the tunnel surrounding rock; the wave-absorbing grouting holes are distributed around the rockburst high-risk area in a staggered mode, the wave-absorbing grouting holes are filled with wave-absorbing grouting materials, and a three-dimensional wave-absorbing grouting area is formed; the energy-absorbing anchor rod is arranged in the three-dimensional wave-absorbing grouting area; the passive pressure-bearing structure comprises a quick-setting concrete layer, a concrete layer containing rubber particles, a steel arch and a steel fiber concrete layer, the concrete layer containing rubber particles is arranged behind the reinforcing mesh, the steel arch is arranged behind the concrete layer containing rubber particles, and steel fiber concrete is arranged behind the steel arch. By constructing the pressure relief-wave absorption-energy absorption-passive pressure bearing four-stage combined supporting system, the safety and adaptability of the supporting system for the rockburst high-risk area are remarkably improved.

A ceiling hanger for reducing transmission of vibrations between ceilings and equipment. The ceiling hanger includes a housing and one or more crumb rubber isolators. The housing includes a first surface, a second surface and one or more side walls connecting the first and second surface. The one or more crumb rubber isolators have through holes for receiving a fastener.

The invention provides a light-weight automobile appearance decorating part added with recycled waste and a forming process of the light-weight automobile appearance decorating part, and belongs to the technical field of automobile part manufacturing. The preparation method comprises the following steps: mixing a core layer melt containing polypropylene recycled after consumption, waste tire rubber and a styrene-ethylene-butylene-styrene block copolymer with a supercritical fluid to form a uniform dispersion; after an acrylonitrile-styrene-acrylate copolymer surface membrane is formed in a mold cavity, injecting the uniform dispersion to drive the membrane to extend and fill; and gas is induced to generate heterogeneous nucleation on the surfaces of the waste tire rubber particles through pressure relief and grow into bubbles. On the premise that the surface glossiness is not degraded, light weight and high toughness of the appearance decorating part and efficient utilization of renewable resources are achieved.

The invention provides a bridge anti-disturbance concrete material and a preparation method thereof, and belongs to the technical field of building materials, the bridge anti-disturbance concrete material comprises a gel material, a reinforcing material and a functional additive; the reinforcing material comprises fibers, modified styrene butadiene rubber particles and self-repairing capsules; the self-repairing capsule comprises a water phase and an oil phase, the water phase contains nano calcium oxide, and the oil phase contains an HDI-ethylenediamine copolymer. The invention provides a bridge anti-disturbance concrete material and a preparation method thereof. The adaptability of concrete to high-frequency vibration and extremely low-temperature environments is improved.

The present application provides a bridge deck paving material, a preparation method thereof and a paving method thereof. The bridge deck paving material includes: a first additive, a second additive, a filler and a modified asphalt; the mass ratio of the filler to the modified asphalt is (15-45):(36-90); the first additive is a carbonized porous polymer, the content of the first additive in the total mass is X, the content of the second additive in the total mass is Y, and X and Y satisfy the following relational expressions: 1.2X ≤ X + Y ≤ 5X; 1.4Y ≤ X + Y ≤ 3Y; a paving method in which the content of the heat-conducting fiber powder in the paving material from the lowest paving layer to the topmost paving layer is controlled to decrease successively, and the content of the rubber particles and the polymer material in the paving material from the lowest paving layer to the topmost paving layer is controlled to increase successively; the bridge deck paving material and the paving method provided by the present application have high water stability, high-temperature stability and low-temperature crack resistance.

The invention relates to the technical field of rubber waste recovery, in particular to waste recovery equipment for rubber product processing, which comprises a base and an upper gland, a sliding strip is integrally formed at the bottom of the upper gland, a sliding groove I is formed in the side wall of the base, and the sliding strip is slidably mounted in the sliding groove I; a first spring is arranged between the bottom of the sliding strip and the bottom of the first sliding groove, a limiting ring is integrally formed on the side wall of the base, and the sliding strip is installed in the limiting ring in a sliding mode. By reducing the distance between the first cutter ring and the second cutter ring, the crushing effect on rubber waste is improved, particles obtained after the rubber waste is crushed are refined, rubber particles between the first cutter ring and the second cutter ring can be effectively cleaned through resetting of the first protective ring sleeve and the second protective ring sleeve, and the rubber waste can be effectively crushed. And the eccentric frame drives the crushing roller to rotate and drives the base to vibrate, so that the rubber waste crushing efficiency can be effectively improved, and the cleaning effect on rubber particles between the first cutter ring and the second cutter ring is improved.

The invention discloses a rubber particle preparation method based on recycled tennis balls, an environment-friendly runway construction method and an environment-friendly runway, and belongs to the field of runway construction.The method comprises the following steps that Sa1, the recycled tennis balls with impurities removed are put into a smashing machine at a constant speed, and surface felt and a rubber inner core are smashed and separated through the smashing machine; sa2, disinfection and washing are carried out; sa3, separating the fibers from the rubber particles; sa4, naturally air-drying the fibers and the rubber particles; sa5, classifying and screening; and Sa6, classifying, sealing and storing. By the adoption of the rubber particle preparation method based on the recycled tennis balls, the environment-friendly runway construction method and the environment-friendly runway, vulcanized rubber resources in the waste tennis balls can be efficiently recycled, meanwhile, high-valued application of the resources is achieved through the following environment-friendly runway construction steps, and a complete technical closed loop of recycling, preparation and application is formed.

The invention discloses phase-change self-temperature-regulating rubber powder modified asphalt and a preparation method thereof, and belongs to the field of asphalt pavement materials, the phase-change self-temperature-regulating rubber powder modified asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 1-5 parts of polyethylene glycol, 5-20 parts of rubber powder and an isocyanate-based compound, the matrix asphalt is heated to a molten state, a polyethylene glycol-rubber powder compound is added, mechanical stirring and mixing are performed, and the phase-change self-temperature-regulating rubber powder modified asphalt is obtained. Then putting the mixture into a drying oven for swelling, and finally performing high-speed shearing to obtain the phase-change self-temperature-regulating rubber powder modified asphalt. The isocyanate group in the isocyanate group compound reacts with the chain end of PEG and the hydroxyl group on the surface of CR, and CR and PEG are compounded through a chemical reaction, so that not only is the high-temperature performance of the phase change modified asphalt improved, but also the harm caused by PEG phase change leakage can be relieved, and the pavement quality and the high-temperature pavement performance can be improved.

The utility model discloses an impurity removal device for asphalt recycling processing, including a removal component, which is composed of a screening mechanism and a plurality of removal mechanisms. The screening mechanism is arranged on the left side of the removal component, and is used for screening the size and diameter of the crushed asphalt particles and removing larger impurities. The screening mechanism is provided with a plurality of screening boxes, and each of the screening boxes is connected to the corresponding cleaning mechanism through a connecting pipe, so that each of the cleaning mechanisms can separate and remove impurities mixed with the asphalt particles in different screening boxes. By arranging the removal component on the impurity removal device for asphalt recycling processing, the rotary screening and cyclone separation on the removal component can separate and remove impurities in asphalt particles of different diameters, replacing the original vibration screening removal method, preventing impurities such as residual fabrics and rubber particles from affecting the quality of the recycled asphalt, and improving the impurity removal efficiency of the impurity removal device for the recycled asphalt.

The invention relates to the technical field of road engineering materials, in particular to high-toughness polyurethane concrete and a preparation method thereof. The high-toughness polyurethane concrete is prepared from the following raw materials in parts by weight: 100 parts of mineral aggregates, 10-18 parts of polyurethane, 0.02-0.08 part of carbon nanotubes, 5-10 parts of rubber particles, 0.2-0.3 part of fibers, 0.1-0.5 part of an improving agent and 0.02-0.05 part of a coupling agent. The carbon nano tubes, the rubber particles and the polyurethane are connected in the mixture to form a net-shaped connection structure through the coupling effect of the coupling agent when the carbon nano tubes, the rubber particles and the polyurethane are mixed, so that the impact resistance and the stability of the mixture are enhanced; the high-temperature performance, the low-temperature performance and the anti-cracking performance of the mixture can be remarkably improved through the cooperation effect of the carbon nano tubes and the rubber particles, meanwhile, based on the cooperation effect of the polyurethane, the carbon nano tubes and the rubber particles, under the high-temperature condition, the curing reaction between the polyurethane and the mixture is accelerated, the polyurethane has good bonding force with aggregate, and the coating force on the aggregate is enhanced.

The utility model discloses cutter passivating and polishing equipment capable of automatically recycling fallen materials, and relates to the technical field of cutter passivating and polishing. The sand blasting device comprises a shell, a supporting plate is installed on the inner wall of the shell, a containing assembly is installed on the supporting plate, a sand blasting device is installed at the upper end of an inner cavity of the shell, a filtering assembly is installed in the inner cavity of the shell, the interior of the shell is divided into an upper cavity and a storage bin through the filtering assembly, and a clamping assembly is installed on the containing assembly. The tool can be fixed on the placing assembly through the clamping assembly, and the sand blasting device can perform sand blasting and polishing treatment on any position of the tool by driving the placing assembly to rotate, so that the working efficiency is improved, and various requirements are met; and through the filtering assembly, a mixture of carborundum and rubber particles sprayed by the sand blasting device can be classified and recycled separately, so that the device can autonomously classify and recycle the mixture, secondary utilization is facilitated, the practicability is improved, and the cost is saved.

The invention discloses tire crushing equipment and method for cracking of waste tires, and relates to the technical field of rubber recovery and cracking treatment. A crushing cavity is formed in a lining steel sleeve in a surrounding mode, and an annular side air gap is formed between the lining steel sleeve and the inner wall of a tank body. A cylindrical electromagnet is arranged in the rotating shaft pipe, an electromagnetic control mechanism is arranged above the tank body, and the electromagnetic control mechanism is provided with an electric brush module electrically connected with the electromagnet. A photoelectric sensor module used for sensing and detecting the real-time size of rubber particles in the crushing cavity is arranged on the top side of the tank body. A cooling mechanism is arranged above the tank body, the air inlet end of the cooling mechanism communicates with the crushing cavity, and the air outlet end of the cooling mechanism communicates with the annular side air gap. Precise control over the whole crushing process is achieved, the crushing effect is ensured, the efficiency of the crushing procedure is improved, and the crushing energy consumption is reduced to a certain degree.

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.

A method of functionalising an elastomeric material, such as a rubber particle, is provided. The method comprises the functionalisation of an elastomeric material through the use of an ionic liquid based composition, which comprises a water soluble polymer, a cationic silicate component, and a salt of a vulcanization accelerator, together with a zinc compound, sulphur, and an accelerator. Rubber particles, for example particles from recycled rubber products, functionalised according to the method disclosed can successfully be utilised in virgin rubber masterbatches at concentrations not previously possible.

The invention discloses a preparation process of an energy-absorbing anti-attrition filling material for a buried pipe type waste mine compressed air energy storage system, which comprises the following steps: (1) adding sodium stearate and graphite powder into hot water, stirring until the sodium stearate is fully dissolved, and then adding graphitized coal gangue particles into the obtained liquid phase for ultrasonic treatment; and drying the water in the reaction system by distillation to obtain the pretreated coal gangue particles. And (2) mixing the pretreated coal gangue particles with tetraethoxysilane, performing ultrasonic treatment, and then putting the mixture into saturated lime water for heating and heat preservation to obtain the self-lubricating anti-attrition coal gangue particles. And (3) uniformly mixing the self-lubricating anti-attrition coal gangue particles with rubber particles to obtain the filling material. The portion between the outer wall of the energy storage pipeline and the cavity is filled with the material layer with the energy absorption function, the probability that the energy storage pipeline is damaged can be effectively reduced, friction between the filling material and the outer wall of the energy storage pipeline is reduced, and damage to the outer wall of the energy storage pipeline is reduced.

The invention belongs to the field of concrete, and particularly discloses a method for predicting the splitting tensile strength of concrete. In the prediction method, the formula for calculating and determining the splitting tensile strength of the concrete relates to the maximum particle size of rubber particles in raw material aggregate for preparing the concrete, the minimum particle size of the rubber particles in the aggregate, the volume ratio of the rubber particles in the aggregate, the particle size coefficient of the rubber particles and the maximum particle size coefficient of the rubber particles in the aggregate. According to the prediction method, the synergistic effect of the particle size interval and the substitution rate of the rubber particles in the concrete raw materials can be considered at the same time, a clear strength prediction range can be provided in the design stage, optimization of aggregate selection and material parameter configuration is facilitated, and the design efficiency and the matching reliability are improved.

To provide a construction method of a high-quality outdoor ground or outdoor coat allowing the deformation of an ascon layer expanded or contracted caused by the different thermal expansion coefficients of the ascon layer composed of asphalt or the like and a surface layer.SOLUTION: An outdoor ground or an outdoor coat 1 is constructed by forming a surface layer 5 including rubber chips or a hard coat on an ascon layer 3 for preventing the protrusion and crack of the ascon layer 3 composed of asphalt or concrete. A slit 30 having a different thermal expansion coefficient between the ascon layer 3 and the surface layer 5 and having a gap capable of deforming the ascon layer 3 expanded or contracted caused by warming is formed on an upper surface 31 of the ascon layer 3, and the surface layer 5 is formed on the ascon layer 3 formed with the slit 30 through an insulating sheet.SELECTED DRAWING: Figure 5

The invention relates to the technical field of municipal roads, in particular to an urban road multifunctional environment-friendly noise-reducing pavement material and a preparation method thereof.The urban road multifunctional environment-friendly noise-reducing pavement material comprises a noise-reducing pavement body, and the noise-reducing pavement body comprises a drainage base layer, a bearing base layer, a bonding layer, a wearing layer and a noise-reducing aggregate layer; the bearing base layer is laid on the top of the drainage base layer, the bonding layer is bonded to the top of the bearing base layer, the wearing layer is bonded to the top of the bonding layer, and the noise reduction aggregate layer is laid on the top of the wearing layer; the rubber particles are added into the noise reduction aggregate layer, so that the pavement can effectively consume sound energy in various modes of sound wave absorption, reflection, scattering and the like in the vehicle driving process, the overall noise reduction capability of the pavement material is improved, the noise reduction function is realized, and the interference of traffic noise to people such as residents, students and patients is greatly reduced.

The utility model relates to the technical field of preheating devices, in particular to a preheating device which comprises a preheating assembly, the preheating assembly comprises a heat preservation barrel, a heating barrel is installed at the top end of the inner wall of the heat preservation barrel, the heating barrel comprises a barrel body, a heating cavity is formed in the barrel body, a heating pipe is installed in the heating cavity, and the heating pipe is connected with the heating cavity. A heat guiding tank is connected to the outer side of the heating cavity of the barrel, the tail end of the heat guiding tank penetrates through the top cover or is inserted into the barrel, the top cover covers the surface of the top end of the heat preservation barrel, and a stirring assembly is installed at the top end of the top cover. The barrel body is arranged in the heat preservation barrel, the heating cavity is formed in the inner wall of the barrel body, and the heating pipe is installed in the heating cavity, so that the inner wall of the barrel body is heated, hot air is guided into the inner cavity of the barrel body through the heat guiding tank after the temperature in the heating cavity rises, and then gas in the inner cavity of the barrel body is preheated; and the rubber particles can be quickly heated and melted when entering the cylinder body, so that the melting time of the rubber particles is shortened.

The present invention discloses a rubber composition, a processing method thereof, and rubber product reinforced with silica using the same. The rubber composition comprises a rubber matrix and essential components, wherein, based on 100 parts by weight of the rubber matrix, the rubber matrix comprises, a branched polyethylene with a content represented as A, in which 0<A≤100, and an EPM and an EPDM with a total content represented as B, in which 0≤B<100; and the essential components comprise 1-10 parts of a crosslinking agent and 15-80 parts of silica. The rubber composition can be used for producing high-voltage insulating sheath rubber, high-temperature resistant conveyor belt, waterproof coil, rubber particles for plastic track surface layer, rubber plug, rubber roller, inner tube, tire tread, tire sidewall, and inner rubber layer of air-conditioner hose.