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366 results about "Crumb rubber" patented technology

Crumb rubber is recycled rubber produced from automotive and truck scrap tires. During the recycling process, steel and tire cord (fluff) are removed, leaving tire rubber with a granular consistency. Continued processing with a granulator or cracker mill, possibly with the aid of cryogenics or by mechanical means, reduces the size of the particles further. The particles are sized and classified based on various criteria including color (black only or black and white). The granulate is sized by passing through a screen, the size based on a dimension (1/4 inch) or mesh (holes per inch : 10, 20, etc.). Crumb rubber is often used in artificial turf as cushioning.

Anti-crack concrete and preparation method thereof

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.
Owner:YANGZHOU TIANYE CONCRETE CO LTD

Soluble polybutadiene rubber pellet conveying device

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.
Owner:振华新材料(东营)有限公司

Multi-source dynamic disturbance rockburst combined support prevention and control system and method

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.
Owner:NORTHEASTERN UNIV CHINA

Vibration isolation hanger

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.
Owner:PLITEQ INC

Light-weight automobile appearance decorating part added with recycled waste and forming process of light-weight automobile appearance decorating part

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.
Owner:JIANGSU KEXIN AUTOMOBILE DECORATION PARTS

Bridge anti-disturbance concrete material and preparation method thereof

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.
Owner:SHAANXI TONGREN APPLIED MATERIAL CO LTD

Rubber particle preparation method based on recycled tennis balls, environment-friendly runway construction method and environment-friendly runway

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.
Owner:BEIJING UNIV OF TECH

Cutter passivating and polishing equipment capable of automatically recycling fallen materials

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.
Owner:FADE (ZHEJIANG) MASCH TECH CO LTD

Method for preparing anti-permeation anti-corrosion filler by using waste rubber and anti-corrosion coating

ActiveCN120924081AAnti-corrosive paintsEpoxy resin coatingsTetrachloroethyleneWaste rubber
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.
Owner:XIAN THERMAL POWER RES INST CO LTD +1

Prediction method for splitting tensile strength of concrete

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.
Owner:DONGGUAN UNIV OF TECH +1

Method for constructing outdoor ground or outdoor court

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
Owner:NITSUSHIYOU SUPOOTSU KOUGIYOU KK

Rubber composition, processing method thereof, and rubber product using the same

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.
Owner:HANGZHOU XINGLU TECHNOLOGIES CO LTD +1

Feeding equipment for rubber shock pad processing

The utility model relates to the technical field of rubber processing equipment, and discloses rubber shock pad processing and feeding equipment which comprises a moving table and connecting frames fixed on the front side and the rear side of the upper surface of the moving table, the upper surfaces of the connecting frames are fixedly connected with side plates, and the inner side faces of the side plates are fixedly connected with feeding hoppers. And the bottom of the outer surface of the feeding hopper communicates with a feeding pipe. According to the feeding equipment for rubber shock pad processing, the feeding hopper, the feeding pipe, the storage device and the moving table are used in cooperation, rubber particle raw materials in the storage barrel enter the feeding hopper through a conveying hose, a hydraulic cylinder pushes a sliding table to move, the outlet end of the feeding pipe moves to the position above a mold, then feeding is conducted on the mold, and the rubber shock pad processing efficiency is improved. Therefore, the device can supply common rubber particle raw materials to the mold, the inner diameters of the conveying hose, the feeding hopper and the feeding pipe are large enough, the probability of blockage of the rubber raw materials is further reduced, and the smoothness of rubber feeding is improved.
Owner:常州市华鑫塑胶制品有限公司

High-viscosity asphalt double-layer SMA pavement layer structure and construction process thereof

The invention belongs to the technical field of steel bridge pavement, and particularly discloses a high-viscosity asphalt double-layer SMA pavement layer structure and a construction technology thereof. The high-viscosity asphalt double-layer SMA pavement layer structure comprises an upper pavement layer, a waterproof bonding layer and a lower pavement layer, the upper pavement layer is laid on the lower pavement layer, the upper pavement layer comprises fine aggregate, limestone powder, modified asphalt, basalt fibers and a Wenn glue mixture, the thickness of the upper pavement layer is 35-40 mm, and the thickness of the waterproof bonding layer is 10-20 mm. The waterproof bonding layer comprises modified asphalt, epoxy resin, a silane coupling agent, a curing agent, a curing accelerator, butadiene styrene rubber, a silane coupling agent and talcum powder, the thickness of the waterproof bonding layer is 0.5-1 mm, and the lower pavement layer comprises coarse aggregate, modified asphalt, acrylonitrile-butadiene-styrene copolymer, porous ceramic particles, rubber particles, calcium stearate and waterborne polyurethane. And the thickness of the lower paving layer is 10-15mm. Various raw materials are mixed, so that the strength and durability of the pavement layer structure are improved, and the service life of the pavement is prolonged.
Owner:SHANDONG SHITONG HIGHWAY CONSTR CO LTD

Rubber-bonded cellulose fibers and manufacturing method therefor, resin composition and manufacturing method therefor, and curable resin composition

An object of the present invention is to provide rubber-bonded cellulose fibers that are less likely to cause an increase in viscosity or melt viscosity when added to various resins. Rubber-bonded cellulose fibers that solve the above problem contain cellulose fibers; a plurality of rubber particles disposed on surfaces of the cellulose fibers and having an average particle size of 300 nm or less; and a silane compound that bonds the cellulose fibers and the rubber particles.
Owner:KUREHA CORPORATION +2

A rubber composition

A rubber composition, which allows unexpectedly improved tearability performance while having maintained or improved hysteresis performance, is based on at least an elastomer matrix, a reinforcing filler, a plasticizing agent, and a crumb rubber. A ratio by weight of the total amount of the reinforcing filler to that of the plasticizing agent is less than 4.50. The total amount of the reinforcing filler and the crumb rubber is more than 30 phr and less than 70 phr. A ratio by weight of the total amount of the crumb rubber to that of the reinforcing filler is more than 0.20 and less than 2.50.
Owner:MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)

Freeze-thaw resistant concrete and preparation method thereof

The invention discloses freeze-thaw-resistant concrete and a preparation method thereof. The freeze-thaw-resistant concrete is prepared from the following raw materials: cement, river sand, gravel, water, isoprene rubber particles coated with paraffin on the surfaces and an additive, the preparation method comprises the following steps: uniformly mixing the river sand and the isoprene rubber particles coated with the paraffin on the surface, adding other raw materials, and uniformly mixing. Space generated after the isoprene rubber particles are extruded provides space for freezing expansion of free water, expansion pressure is relieved, the freeze-thaw resistance of concrete is improved, the surfaces of the isoprene rubber particles are coated with paraffin, and under the freeze-thaw condition, the paraffin is solidified, releases heat and reduces osmotic pressure and ice expansion pressure, so that the freeze-thaw resistance of the concrete is improved, and the service life of the concrete is prolonged. The paraffin surrounds the isoprene rubber particles, erosion of water to the isoprene rubber particles can be reduced, aging of the isoprene rubber particles can be inhibited, the thermal conductivity of the paraffin and the isoprene rubber particles is smaller than that of aggregate, temperature reduction of the aggregate can be inhibited, and the freeze-thaw resistance of the concrete is further improved.
Owner:浙江研翔新材料有限公司

High-strength and high-toughness PVC profile and preparation method thereof

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.
Owner:POTENTECH GUANGDONG

High styrene rubber particle drying device based on pneumatic energy recovery

The invention relates to the technical field of rubber particle drying equipment, and discloses a high styrene rubber particle drying device based on pneumatic energy recovery. The device comprises an equipment bin, a fixing plate and a mounting plate are mounted at the end of the equipment bin, and a drying assembly, an air guide assembly and a driving assembly are arranged in the equipment bin. A drying cylinder in the drying assembly pushes materials through a threaded guide plate, when the drying cylinder rotates, a second driving gear on a fixing frame drives a second driven gear, and a centrifugal air guide impeller is driven through a transmission belt to suck water vapor in an equipment bin. Air flow is accelerated through the air guide nozzle with the Venturi effect and then guided into the sealing bin, the driven impeller is driven to rotate, and then automatic discharging of the material pushing plate is achieved. And meanwhile, after being dehumidified and cooled by the water absorption silica gel in the sealing bin, the water vapor cools the discharged materials through the discharge pipe. Pneumatic energy recovery and heat energy gradient utilization are achieved, the energy consumption is reduced, meanwhile, the drying efficiency is improved, and the beneficial effects of being integrated in structure and convenient and fast to maintain are achieved.
Owner:烟台世缘橡胶有限公司

Low-dielectric and high-temperature-resistant modified cyanate ester resin and preparation method thereof

PendingCN121930665ASimple processOptimize network structurePolymer scienceResin matrix
The invention relates to the technical field of high-performance polymer materials, in particular to low-dielectric and high-temperature-resistant modified cyanate ester resin and a preparation method thereof. Advantages and characteristics of bisphenol A type cyanate ester monomers and bisphenol M type cyanate ester monomers are combined, and the dielectric property and the thermal stability are remarkably improved. Diallyl bisphenol A is introduced as a network structure modifier, the phenolic hydroxyl group of the diallyl bisphenol A adjusts the curing reaction rate, and the allyl and bisphenol A structures of the diallyl bisphenol A finely regulate and control the rigid-flexible balance of a cross-linked network through chemical copolymerization, so that the curing process is controllable and the final network structure is optimized. Meanwhile, a toughening system is innovatively designed, epoxy-terminated liquid nitrile rubber is adopted for toughening, stable micron-scale rubber particles are formed in a resin matrix in a chemical bonding mode, and the fracture toughness is improved. The modified resin has excellent dielectric properties, high heat resistance and a wide process window, and meets the strict requirements of a new generation of low observability aircrafts on a bearing-stealth integrated composite material matrix.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Hybrid runway article and method of making the same

The present application provides a hybrid runway article comprising from top to bottom: (I) a topcoat layer made from a first composition comprising an externally emulsified polyurethane dispersion and rubber particles, wherein the externally emulsified polyurethane dispersion is derived from: (Ai) an isocyanate component comprising one or more compounds having at least two isocyanate groups, (Bi) an isocyanate-reactive component comprising one or more compounds having at least two isocyanate-reactive groups, (Ci) an optional catalyst, (Di) an external emulsifier, (Ei) a chain extender, and (Fi) water, and (II) a bottom layer made from a second composition comprising a 1K solventless polyurethane binder and rubber particles.
Owner:DOW GLOBAL TECHNOLOGIES LLC

Rubber production waste recycling device

The rubber production waste recycling device comprises an outer barrel, a second inner barrel located in the outer barrel and a first inner barrel located in the second inner barrel, a feeding opening is formed in the wall body of the outer barrel, a side plate capable of horizontally moving is arranged on one side of the outer barrel, and the first inner barrel is arranged on the side plate. A cutting blade is arranged on the inner wall of the outer cylinder body at the feeding port, a rotating roller is arranged in the first inner cylinder body, a first through groove is formed in the wall body of the first inner cylinder body, a crushing plate is arranged on the rotating roller, and a discharging assembly used for conveying rubber particles is arranged in the rotating roller; a push block is arranged on the outer circle wall of the second inner cylinder, a feeding plate is arranged in the second inner cylinder, and a second through groove is formed in the wall body of the second inner cylinder. According to the device, rubber is firstly frozen at low temperature, then the rubber can be smashed into particles through beating and impacting of the smashing plate, and therefore recycling of rubber waste is achieved.
Owner:HUBEI KAILIANG NEW MATERIAL TECH CO LTD

Solid waste flexible landfill reinforcing mechanism

ActiveCN224678754UCarbon fibersBasalt fiber
The utility model relates to flexible landfill reinforcement technical field, concretely relates to a kind of solid waste flexible landfill reinforcement mechanism, including side weir, composite reinforcement mechanism is provided in the inside of side weir, composite reinforcement mechanism includes the carbon fiber geogrid of several groups being laid in the inside of side weir, the top of carbon fiber geogrid is fixedly connected with flexible layer, flexible layer is composed of rubber particle and bentonite, basalt fiber is mixed in the inside of flexible layer, the top of flexible layer is fixedly connected with steel fiber concrete layer, the surface of steel fiber concrete layer is provided with four groups of installation slot. The utility model cooperates through side weir and composite reinforcement mechanism, provides high-strength tensile property through carbon fiber geogrid, effectively resists tensile deformation caused by uneven settlement of landfill, utilizes flexible layer to be made of rubber particle-bentonite-basalt fiber composite, and has elastic deformation capacity and impermeability.
Owner:YANGZHOU JIEJIA IND SOLID WASTE HANDLING CO LTD

Rubber carpet injection molding device

The utility model relates to rubber carpet processing technical field especially rubber carpet glue injection forming device, including bottom plate and the processing frame of setting at the top of bottom plate, the left and right ends of processing frame are connected with auxiliary block, the outer end sliding connection of auxiliary block has the push -back, the top of push -back is provided with the slot, the rear end of push -back is connected with the hopper, the rear end of hopper is connected with the connecting plate, the bottom of connecting plate is connected with the scraper, the inside sliding connection of push -back has the baffle, the front end of baffle is connected with the pull -out plate, and the baffle is used for stopping the hopper bottom, and the slot is used for moving push -back and sliding on the auxiliary block, the utility model discloses the coordination and cooperation of material guide and scraping flat structure, significantly improve the uniformity and pressing quality of rubber particle filling, effectively reduce the finished product defect rate, guarantee the stability and consistency of the forming process.
Owner:GUANGZHOU GOOD PLASTICPRODUCTS CO LTD

Polyurethane rubber as well as preparation method and application thereof

The invention discloses polyurethane rubber as well as a preparation method and application thereof, and belongs to the field of road engineering materials. The polyurethane rubber is prepared from the following components in parts by weight: 4 to 6 parts of polyether polyurethane adhesive, 90 to 96 parts of aggregate, 2 to 6 parts of mineral powder, 5 to 25 parts of rubber particles and 0.3 to 1.5 parts of calcium hydroxide, and the aggregate comprises coarse aggregate A with the particle size of 9.50 to 13.20 mm, coarse aggregate B with the particle size of 4.75 to 9.50 mm, coarse aggregate C with the particle size of 2.36 to 4.75 mm and fine aggregate with the particle size of less than 2.36 mm. The polyurethane rubber provided by the invention can achieve the effects of excellent noise reduction performance and excellent mechanical durability.
Owner:YANGZHOU UNIV

Combined type plastic track buffer structure

The utility model relates to the field of plastic runways, and discloses a combined type plastic runway buffer structure which comprises a supporting assembly and a positioning assembly, the positioning assembly is installed at the bottom of the supporting assembly, the supporting assembly comprises a bottom plate and a waterproof film, the top of the waterproof film is coated with a bonding layer, and the bonding layer is arranged on the bottom plate. Sealing sleeves are connected to the positions, close to the two sides, between the bottom plate and the waterproof film, the top of the bottom plate is filled with an elastic plastic layer, the top of the elastic plastic layer is filled with a rubber particle layer, and a plurality of rubber columns are installed in the elastic plastic layer and the rubber particle layer in a penetrating mode. The rubber columns are sealed, so that the overall buffering is improved, external moisture is prevented from entering, and the expansion can be adapted in the buffering process; and through the grating plate and the leveling layer, the adhesive force of the grating plate is increased, overall supporting and fixing are improved, and separation caused by sliding between the grating plate and the ground is prevented.
Owner:SHANDONG DONGHAI GRP CO LTD

Multi-source power rock burst disturbance combined supporting prevention and control system and method

The application provides a multi-source power disturbance rock burst combined supporting prevention and control system and method, relates to the rock burst disaster prevention and control technical field, and comprises a stress release hole, a wave absorbing grouting hole, an energy absorbing anchor rod and a passive pressure bearing structure; the stress release hole is arranged in a rock burst high risk area of tunnel surrounding rock; the wave absorbing grouting holes are arranged staggeredly around the rock burst high risk area, 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 rapid setting concrete layer, a rubber particle containing concrete layer, a steel arch and a steel fiber concrete layer, the rubber particle containing concrete layer is arranged behind the steel mesh, the steel arch is arranged behind the rubber particle containing concrete layer, and the steel fiber concrete is arranged behind the steel arch. The four-level combined supporting system of pressure relief-wave absorbing-energy absorbing-passive pressure bearing is constructed, and the safety and adaptability of the supporting system of the rock burst high risk area are remarkably improved.
Owner:NORTHEASTERN UNIV CHINA

Preparation method of photo-thermal double-excitation self-repairing rubber modified asphalt

The invention discloses a preparation method of photo-thermal double-excitation self-repairing rubber modified asphalt, and belongs to the technical field of road engineering materials. The method comprises the following steps: firstly, dissolving 8.8-10 parts by weight of 2, 2 '-diaminodiphenyl disulfide and 10-12 parts by weight of vanillin in ethanol, carrying out reflux reaction at 80-85 DEG C for 8-12 hours, and washing and drying to obtain a double-dynamic covalent cross-linking agent with disulfide bonds and imine bonds; secondly, carrying out internal mixing and hot press molding on 90-110 parts by weight of epoxidized natural rubber with the epoxy value of 50 and 4-8 parts by weight of the cross-linking agent, and crushing to obtain photo-thermal double-excitation self-repairing rubber particles; and finally, melting 100 parts by weight of matrix asphalt, adding 4-8 parts by weight of rubber particles in 3-5 times, and performing high-speed shearing at 175-180 DEG C for 30-40 minutes to obtain the modified asphalt. By constructing an imine bond-disulfide bond synergistic dynamic cross-linked network, the asphalt is endowed with excellent photo-thermal double-excitation self-repairing capacity, and meanwhile, the asphalt has good high and low temperature performance and mechanical strength.
Owner:TIANJIN CHENGJIAN UNIV

Backfill composed of mixed industrial waste applied to low load level

The invention relates to the field of construction materials, in particular to a backfill material composed of mixed industrial waste applied to a low load level, the backfill material composed of the mixed industrial waste applied to the low load level comprises broken tempered glass, old plastic and waste tire rubber particles according to the volume ratio of 6: (1-1.5): (2.5-3), the water content of the backfill material is 0.7-1.2%, and the water content of the backfill material is 0.5-1.5%. And when the backfill material is dumped to the backfill area, the ground clearance of the backfill material is 1.5-2m. The backfill material composed of the mixed industrial waste materials applied to the low load level is composed of pure waste materials, the waste materials meet environmental safety, the backfill material only needs to be directly poured into a backfill area at a certain height during use, the compaction degree can be larger than 90% without being compacted, the vertical strain of a formed backfill body under the load of 6 kPa is smaller than 0.42%, and the vertical strain of the backfill body under the load of 6 kPa is smaller than 0.42%. And the method can be applied to low-load-level engineering parts such as municipal pipe gallery backfilling and park greenway lower cushion layers.
Owner:GUANGZHOU MARITIME INST

Method for preparing anti-permeation anticorrosive filler by using waste rubber and anticorrosive coating

ActiveCN120924081BAnti-corrosive paintsEpoxy resin coatingsTetrachloroethyleneWaste rubber
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.
Owner:XIAN THERMAL POWER RES INST CO LTD +1