112 results about "Rubberized asphalt" patented technology

The invention discloses carbon-based material loaded hydrotalcite synergistically modified composite rubber asphalt which comprises the following components in percentage by mass: asphalt, rubber powder, a dispersing agent, a retarder, carbon-based material loaded hydrotalcite, an antioxidant and a heat stabilizer. The carbon-based material loaded hydrotalcite, the antioxidant and the heat stabilizer are compounded, so that the ultraviolet aging resistance, the oxidation aging resistance and the mechanical strength of the composite rubber asphalt can be remarkably improved, the limitation of a single modified material is effectively overcome, and the service life of an asphalt road is greatly prolonged.

The invention provides low-temperature-resistant high-modulus rubber asphalt and a preparation method thereof, and relates to the technical field of rubber asphalt, and preparation raw materials of the low-temperature-resistant high-modulus rubber asphalt comprise the following components: matrix asphalt, rubber powder, a desulfurizer, a free radical type thermal initiation crosslinking agent, a reinforcing agent, a coupling agent, a flexibilizer, a viscosity reducer and an auxiliary agent. According to the low-temperature-resistant high-modulus rubber asphalt provided by the invention, the ductility at 5 DEG C is greater than 30cm, the maximum breaking flexural-tensile strain of a mixture at-10 DEG C is greater than 4000 mu epsilon, the dynamic modulus of the mixture at 15 DEG C is greater than 15000MPa, and the high-temperature performance and modulus of high-modulus asphalt concrete are not reduced while the crack resistance of the high-modulus asphalt concrete is helped to be improved. When being applied to pavement middle layer pavement, the pavement anti-cracking agent can improve the anti-cracking performance of the whole pavement structure, reduce the pavement maintenance cost and improve the driving safety.

The invention provides tail gas treatment equipment for rubber asphalt production, which comprises a treatment tank, and further comprises an inner cylinder arranged on the inner side of the treatment tank, and the upper part of the inner side of the inner cylinder is provided with a fine filter screen and a coarse filter screen; a plurality of cleaning pipes are circumferentially distributed and mounted on the rotating shaft on the upper side of the coarse filter screen, cleaning brushes are mounted on the lower sides of the cleaning pipes, blowing holes are formed in the lower sides of the cleaning pipes, a plurality of reverse blowing pipes are circumferentially distributed and mounted on the rotating shaft on the lower side of the fine filter screen, and blowing heads are mounted on the upper sides of the reverse blowing pipes; the pressure relief reverse blowing mechanism is used for conveying compressed air to the inner cavity of the rotating shaft; and the regulation and control mechanism is used for controlling and regulating air in the inner cavity of the rotating shaft to be conveyed to the cleaning pipe and the reverse blowing pipe. Through graded filtration of the double-layer filter screen and cooperative dust removal of the cleaning brush and the reverse blowing nozzle, particulate matters are effectively intercepted, long-acting smoothness of the filter screen is ensured, and the tail gas purification efficiency and the system operation stability are improved.

The invention relates to the technical field of waterproof coatings, in particular to a photo-initiation cold coating type non-curing rubber asphalt waterproof coating and a preparation method thereof, and the photo-initiation cold coating type non-curing rubber asphalt waterproof coating comprises an asphalt-based main material, a photo-curing agent and epoxy resin; the light curing agent is composed of a photoinitiator, a rubber monomer and a hindered amine light stabilizer, and the photoinitiator comprises a benzothiophene compound; the waterproof coating is in a single-component paste state, can be constructed at normal temperature, and is cured to form a waterproof coating film after being irradiated by ultraviolet rays; according to the technical scheme, a cross-linking system of the light curing agent and the epoxy resin not only keeps the creep deformation and self-healing characteristics of non-cured rubber asphalt, but also improves the heat resistance, acid, alkali and salt resistance and bonding performance of a coating film through a three-dimensional network cross-linking structure, and it is ensured that a waterproof layer adapts to building structure deformation and severe environments for a long time.

The application belongs to the technical field of underground garage civil air defense area raft slab, and particularly relates to a waterproof structure and construction method of an underground garage civil air defense area raft slab of a large urban complex, which comprises a raft slab body, wherein the raft slab body comprises a soil base layer, a waterproof layer, a waterproof protection layer, a steel mesh layer and a concrete layer, the upper surface of the raft slab body is fixedly connected with a civil air defense frame wall, and the front of the civil air defense frame wall is provided with a civil air defense door. The waterproof sealing plate, the water stop ring and the non-solidified rubber asphalt are arranged, the bottom end of the supporting steel pipe can be sealed by the waterproof sealing plate, the water seepage path and the immersion resistance of the supporting steel pipe are increased by the water stop ring, the water seepage resistance of the supporting steel pipe is increased, the waterproof performance of the supporting steel pipe is increased, the sealing property of the supporting steel pipe is increased by the non-solidified rubber asphalt, the water seepage liquid can be effectively prevented from entering the supporting steel pipe, the corrosion of the supporting steel pipe is effectively solved, and the safe and stable use of the civil air defense door is facilitated.

The invention discloses a pavement performance detection device and method for a rubber asphalt stress absorbing layer, the pavement performance detection device comprises a bottom box, an arch-shaped shell is mounted at the top of the bottom box, and a performance detection mechanism is arranged between the interior of the bottom box and the arch-shaped shell to realize clamping tensile detection of the rubber asphalt stress absorbing layer, and the invention relates to the technical field of performance detection. According to the pavement performance detection device and method for the rubber asphalt stress absorbing layer, the performance detection mechanism is arranged, a product is clamped by utilizing the combination of an upper clamping part and a lower clamping part, and the product is kept in the center before being subjected to tensile detection by virtue of the arrangement of a centering unit and a supporting unit; according to the utility model, the stress at each part is consistent during product detection, so that the subsequent detection result is more accurate, the vertical state is kept, the more accurate stretching operation is completed, and the performance detection precision and efficiency are improved.

The invention discloses a foamed rubber asphalt formula determination method. The method comprises the following steps: S1, constructing a molecular model of a foamed rubber asphalt composite system; s2, performing molecular dynamics simulation on the molecular model to obtain a balanced stable structure configuration; s3, based on the stable structure configuration, under the conditions of different rubber mixing amounts, foaming medium mixing amounts and temperatures, calculating the shear modulus, interface adhesion work and fracture energy of the foam rubber asphalt system; and S4, performing multi-objective optimization by taking the shear modulus, the interface adhesion work and the fracture energy as performance indexes, and determining a combination of the temperature, the foaming medium mixing amount and the rubber mixing amount of the optimal formula of the foamed rubber asphalt. According to the method, the combination of the foaming temperature, the foaming medium mixing amount and the rubber mixing amount is determined through molecular modeling and a multi-objective optimization algorithm, and performance prediction and parameter optimization of the foamed rubber asphalt are achieved.

Aiming at the problems that the molecular weight of the existing SBS modified asphalt is broken and the rubber powder of the rubber asphalt is unstable to degrade, the composite modified asphalt binder with a dense molecular structure is prepared by a three-step method of constructing a'molecular grading template ', optimizing a rubber powder analysis process and filling vacancy molecules. The process comprises the following steps: determining an asphalt molecular weight distribution template by taking the optimal rheological property as a target, and regulating and controlling the rubber powder analysis temperature (180-220 DEG C), the time (3-6 hours) and the stirring speed (500-1500 r / min) to ensure that the molecular weight distribution overlapping degree of a rubber powder analysis system and the template is greater than or equal to 85%; and finally, filling corresponding prototype compounds (such as styrene-butadiene block copolymers, antioxidants and the like) according to molecular vacancy types of an analysis system and the template to form a dense molecular structure. The prepared binder is continuous and stable in molecular weight distribution, the high-temperature anti-rutting factor is improved by 40% or above, the anti-aging performance is improved by 30%, the binder is suitable for a highway surface layer with the service life of 30 years, and the service life of a pavement can be remarkably prolonged.

The utility model relates to a tunnel noise-reducing and flame-retardant pavement structure, which aims to solve the problems of high noise and poor flame-retardant property of the conventional tunnel pavement. The tunnel noise-reduction and flame-retardant pavement structure sequentially comprises an upper surface layer, a middle surface layer, a lower surface layer, a base layer, a subbase layer, a stress absorption layer and a tunnel inverted arch from top to bottom, thermal spraying type modified asphalt is adopted between the upper surface layer and the middle surface layer to serve as a first bonding layer, and thermal spraying type modified asphalt is adopted between the middle surface layer and the lower surface layer to serve as a second bonding layer. A broken stone sealing layer is adopted between the lower surface layer and the base layer as a third bonding layer; wherein the upper surface layer is made of a macroporous asphalt mixture doped with a flame retardant, the middle surface layer is made of an asphalt mixture of SBS modified asphalt, and the lower surface layer is made of a rubber asphalt mixture. According to the tunnel noise-reducing and flame-retardant pavement structure, the fire retardant is doped in the surface layer, the ignition point of the pavement is improved, and the pavement surface layer adopts the macroporous asphalt mixture, so that the driving noise of the pavement is reduced, and the influence on driving and pedestrians is reduced.

This invention relates to a stable and durable high-content waste tire rubber powder modified asphalt, its mixture, and a preparation method. The raw materials, by weight percentage, are: 100 parts base asphalt; 40-50 parts waste tire rubber powder; 5-7 parts viscosity reducer; 0.1-0.8 parts crosslinking agent; and 1-2 parts reinforcing agent. The crosslinking agent is ABS, and the viscosity reducer is at least one selected from naphthenic rubber oil, alkane rubber oil, aromatic rubber oil, and polycyclic aromatic rubber oil. In the mixture, 40-mesh and 200-mesh waste tire rubber powder are added. The combination of rubber powder with different particle sizes replaces aggregate and filler in equal amounts, and forms a combination with some incompletely swollen rubber powder in the modified asphalt, achieving stable gradation. This high-content waste tire rubber powder modified asphalt not only significantly increases the waste tire rubber powder content but also exhibits good product stability and can be stored for a longer period. The stability and durability of its modified asphalt mixture are significantly improved, further enhancing the road performance of rubber asphalt and extending the service life of the pavement.

The utility model relates to the technical field of roofs, and discloses a novel assembly type waterproof heat preservation roof which is characterized in that non-cured rubber asphalt waterproof paint is arranged on a roof structural plate; the tire-free self-adhesive waterproof coiled material is arranged on the non-cured rubber asphalt waterproof coating; the double-layer PIR insulation board is arranged on the tire-free self-adhesive waterproof coiled material; the TPO polymer waterproof coiled material is arranged on the double-layer PIR insulation board; the sand cement layer is arranged on the TPO polymer waterproof coiled material; the roof decorative bricks and the pebbles are arranged on the sand-lime layer; the rod body I is arranged on the roof decoration brick through the mounting seat; the first fixing hole is formed in the first rod body; the second rod body is arranged on the first rod body in a sliding mode, a plurality of second fixing holes are formed in the second rod body, and the first fixing holes and the second fixing holes are fixedly connected through bolts and nuts; the rainproof shed is rotationally arranged on the second rod body through a connecting piece. All the components are matched, and the problem that an original roof structure needs to be integrally renovated during maintenance is solved.

The invention discloses a dam leakage disposal self-repairing high polymer grouting material and a dam leakage disposal method, and belongs to the technical field of grouting repair, the dam leakage disposal self-repairing high polymer grouting material comprises a component A resin and a component B; the component A is prepared from the following components in parts by mass: 40 to 60 parts of asphalt, 10 to 20 parts of aromatic hydrocarbon oil for environment-friendly rubber, 8 to 20 parts of rosin polyester polyol, 20 to 40 parts of polyphenylmethane polyisocyanate, 0.1 to 1 part of a catalyst and 5 to 15 parts of an auxiliary agent; the component B is a curing agent; the component A resin also comprises 1.5 to 6.5 parts by weight of isocyanate polar groups; the non-cured rubber asphalt waterproof material disclosed by the invention has excellent self-healing property, adhesive property and wet base layer constructability of a non-cured rubber asphalt waterproof material; the adhesive contains isocyanate polar groups, can form chemical linkage with the surfaces of base materials such as sandy soil, concrete, rock soil and the like, and has a better bonding effect.

The application provides a heating and heat preservation device and a mobile modified rubber asphalt production equipment, and relates to the technical field of asphalt production and heat preservation. The heating and heat preservation device comprises a storage tank and a turnover heat conduction mechanism. A pipe rod is arranged through the axis of the storage tank and rotates, a rotating drive assembly is installed on the driving end shaft of the end of the storage tank and rotates. An oil inlet assembly is rotatably and communicatively arranged with a front pipe cylinder, an oil return assembly is rotatably and communicatively arranged with a rear pipe cylinder, a front coil pipe is symmetrically arranged on both sides of a front shaft, and a rear coil pipe is symmetrically arranged on both sides of a rear shaft. The front coil pipe and the rear coil pipe are arranged in the middle of the storage tank, the rotated front coil pipe and the rear coil pipe further increase the heat conduction area, the front coil pipe and the rear coil pipe can stir the asphalt oil in the storage tank, the heated asphalt oil in the storage tank is more uniform, the uniformity of the rubber powder and the asphalt oil in the storage tank is improved, and the deposition of the rubber powder is reduced.

The invention discloses a pressure type anti-floating anchor rod waterproof construction structure, which comprises a finish rolling twisted steel anchor rod, a pressure type anti-floating anchor rod and a pressure type anti-floating anchor rod, the bottom waterproof material layer is arranged in a circular area above the raft cushion layer and around the finish-rolled twisted steel anchor rod; the first non-cured rubber asphalt layer is arranged above the bottom waterproof material layer and in a circular area around the finish-rolled twisted steel anchor rod; the anchoring plate is arranged on the finish rolling twisted steel anchor rod in a sleeving manner, and is locked to the first non-cured rubber asphalt layer through a first nut after the finish rolling twisted steel anchor rod is tensioned; the steel sleeve is arranged on the anchoring plate and arranged on the outer side of the first nut in a sleeving mode, the steel sleeve is filled with non-cured rubber asphalt, and the steel sleeve and the outer portion of the anchoring plate are integrated with the first non-cured rubber asphalt layer by painting a second non-cured rubber asphalt layer; and the cement mortar waterproof protection layer is of an arc splayed structure and is arranged at the slab staggering position between the anchoring plate and the second non-cured rubber asphalt layer.

The application discloses a kind of off-wall type structure heat preservation waterproof structure, including concrete wall, the concrete wall inside is coated with 1mm thick crystalline waterproof paint for the waterproof protection of concrete wall left side, and concrete wall outside is coated with 20mm thick mortar screed layer can guarantee the flatness of concrete wall right side surface;It also includes: high viscosity anti-slip water rubber asphalt waterproof paint, uniformly coated in the right side of the mortar screed layer, and high viscosity anti-slip water rubber asphalt waterproof paint thickness is 1.5mm.The off-wall type structure heat preservation waterproof structure, by increasing water rock wool plate body, self-adhesive type high polymer waterproof roll material and high viscosity anti-slip water rubber asphalt waterproof paint on the existing off-wall type structure lining, thereby effectively improving the waterproofness and heat preservation performance of existing off-wall type structure, more conducive to building energy consumption control, low-costly solve the lining heat preservation waterproof structure of off-wall type structure, and be applicable to widely popularization and application.

A composite waterproof membrane for waterproofing concrete slabs and foundation walls is disclosed. The waterproof membrane includes: a rubberized asphalt layer; a polymeric adhesive layer having one face bonded to one surface of the rubberized asphalt layer and having an opposite face with surface voids; and a vapor barrier layer bonded to an opposite surface of the rubberized asphalt layer. The surface voids of the adhesive layer allow concrete poured on the adhesive layer to be filled in the voids and anchor the concrete to the adhesive layer, thereby ensuring water tightness between the composite waterproof membrane and the concrete. Methods and systems for waterproofing blind-side building foundations using the waterproofing membranes are also disclosed.

The application provides a water-based non-cured rubber asphalt waterproof coating and a preparation method thereof, and belongs to the technical field of building waterproof materials.The waterproof coating comprises the following raw materials in parts by weight: asphalt 50-60 parts, a compatilizer 20-30 parts, a modifier 9-14 parts, a tackifier 3-5 parts, a coupling agent 1.5-2.5 parts, water 50-60 parts, an emulsifier 3-5 parts and a stabilizer 0.2-0.5 parts; the modifier is a thermoplastic elastomer and a high molecular polymer emulsion.The application also provides a preparation method of the water-based non-cured rubber asphalt waterproof coating.The coating can be applied at normal temperature without heating, the performance of the coating is equivalent to that of a hot-melt non-cured rubber asphalt waterproof coating, and the corrosion resistance, the flame resistance and the adhesion of the base layer of the coating are improved.

The application provides a stable rubber asphalt preparation method and equipment, wherein the weighed base asphalt and rubber powder are poured into an improved mixing device for mixing, the temperature in the improved mixing device is kept at 150±10 DEG C, and the improved mixing device further comprises at least one material lifting unit for lifting the material at the bottom of the device to the upper part for sufficient mixing to obtain a rubber powder mixture. The stable rubber asphalt preparation method can make the material in the mixing device uniformly mixed up and down, improve the mixing efficiency and the product quality, and through the tank body, the stirring part, the lifting part and the dispersing part, the material in the mixing device is mixed up and down, and the material lifted to the top of the tank body is dispersed into the upper material through the dispersing part, the contact range between the parts of the material is improved, and the mixing efficiency and the product quality are improved.

The application discloses a preparation method of rubber asphalt. The acid treatment montmorillonite is modified by a quaternary ammonium salt, so that the montmorillonite forms a microporous and mesoporous multi-dimensional void structure, and the adsorption capacity is improved. Under the action of isocyanate, the montmorillonite is combined with the tire rubber powder. When the asphalt is constructed at high temperature, the hydrogen sulfide scattered by the rubber powder is adsorbed by the montmorillonite and removed by zinc oxide. The modified montmorillonite is designed and pre-combined with the rubber powder. When the asphalt is constructed, the hydrogen sulfide gas scattered by the rubber powder can be effectively removed, the environmental protection requirement is met, and the harm to human bodies is reduced.

The invention discloses a plateau alpine region crack-resistant durable foundation bed surface structure and a laying method thereof, the plateau alpine region crack-resistant durable foundation bed surface structure is arranged between a base plate fixed with a track plate and a foundation bed bottom layer, and the plateau alpine region crack-resistant durable foundation bed surface structure sequentially comprises an asphalt concrete waterproof sealing layer, a rubber asphalt stress absorbing layer and a crack-resistant base layer from top to bottom; the asphalt concrete waterproof sealing layer is obtained by mixing, paving and rolling aggregate and high-viscoelastic rubber modified asphalt; the rubber asphalt stress absorbing layer is obtained by synchronously spraying high-viscoelastic rubber modified asphalt and macadam on a steel wire mesh uniformly paved on the anti-cracking base layer, and the anti-cracking base layer is obtained by paving rubber modified cement stabilized macadam in a layered manner; the high-visco-elastic rubber modified asphalt is asphalt in which the mixing amount of the activated rubber powder is 25%-35%. The device is ingenious in structure and convenient to prepare, all the layers have a synergistic effect, load stress can be effectively dispersed, transmission of base layer concrete cracks is blocked, and therefore generation and expansion of track foundation bed cracks are restrained, and the service life of a track is prolonged.

The utility model discloses a non-curing rubber asphalt waterproof coating operation tool, which belongs to the technical field of waterproof construction and comprises a mounting base plate, an L-shaped connecting frame is fixedly mounted on the mounting base plate, a transverse mounting strip block is fixedly mounted at one end of the L-shaped connecting frame, and a limiting sliding groove is formed in the bottom of the transverse mounting strip block. A transverse moving driving assembly is mounted in the limiting sliding groove, a vertical connecting frame is mounted on the transverse moving driving assembly, a lifting strip block is slidably inserted into the vertical connecting frame, the lifting strip block is fixedly connected with the vertical connecting frame through a plug pin positioning assembly, a blade coating plate is mounted at the bottom of the lifting strip block, and the blade coating plate is in threaded connection with the lifting strip block through a connecting screw rod; according to the utility model, flexible transverse movement and lifting adjustment of the blade coating plate can be realized, the accuracy and efficiency of waterproof coating construction are improved, and the blade coating operation can be flexibly adjusted according to different construction requirements.

Some embodiments relate to a method for producing a rubber-containing asphalt composition. The method for producing the rubber-containing asphalt composition comprises obtaining a rubber component; obtaining an unoxidized asphalt; mixing the rubber component and the unoxidized asphalt to obtain an unoxidized asphalt composition; oxidizing the unoxidized asphalt composition to obtain an oxidized asphalt composition; and forming a roofing shingle from the oxidized asphalt composition.

The invention provides a non-sticking wheel rubber asphalt composite material and a preparation method thereof, and belongs to the technical field of road engineering materials. The preparation method of the non-sticking rubber asphalt composite material comprises the following steps: pre-treating rubber asphalt to obtain pre-treated rubber asphalt, adding a compatilizer into the pre-treated rubber asphalt, carrying out heat preservation, stirring and mixing, carrying out first shear emulsification to form a homogeneous system, adding an additive into the homogeneous system, and carrying out second shear emulsification to obtain the non-sticking rubber asphalt composite material. And carrying out intermittent stirring on the low-viscosity modified rubber asphalt, and carrying out ultrasonic standing, so as to obtain the non-stick wheel rubber asphalt composite material. The oxidized polyethlene wax is uniformly dispersed through a composite process, the dynamic viscosity is remarkably reduced, the softening point is improved, the problem of wheel sticking during construction is effectively solved, and meanwhile, the storage stability of the material is prolonged.

The present application relates to the technical field of asphalt modification, and particularly relates to a self-healing modified asphalt, asphalt mixture and a preparation method thereof. The self-healing modified asphalt comprises the following raw materials: base asphalt, organic modified montmorillonite and bagasse fiber. The added weight of the organic modified montmorillonite accounts for 0.5-5% of the weight of the base asphalt. The particle size of the organic modified montmorillonite is 0.5-30 microns, and the organic modified montmorillonite has a layered structure. The added weight of the bagasse fiber accounts for 0.1-5% of the weight of the base asphalt. The organic modified montmorillonite-bagasse fiber modified asphalt has low viscosity, small softening point and high penetration. The modified asphalt performs well in the crack repair process. The addition of the organic modified montmorillonite and the bagasse fiber significantly improves the self-healing performance of the modified asphalt. The self-healing performance of the organic modified montmorillonite-bagasse fiber modified asphalt is significantly better than that of rubber asphalt.

The utility model discloses a rubber asphalt flue gas development, collection and detection test device, and belongs to the technical field of highway engineering indoor tests. The generating device comprises a numerical control magnetic stirrer, a magnetic stirrer, a cross clamp, a metal support, a numerical control constant-temperature heating sleeve, a reaction bottle, a sealing buckle, a three-opening reaction cover, a rubber plug with a hole and a glass guide pipe; the filtering device comprises a polymer filter and a water vapor filtering box which are connected through a rubber conduit; the cooling device comprises a water container and a cooling ice brick arranged in the water container; and the detection device comprises a water vapor filtering trap and a detector. According to the utility model, the generation device is taken as a core, different detection instruments can be replaced, the generation of flue gas and sulfur-containing compounds generated during the production of rubber asphalt is simulated indoors, the quantitative detection of the concentrations of VOCs and sulfur-containing compounds in the rubber asphalt can be realized, and equipment support is provided for exploring the smoke suppression and odor removal effects of different modifiers on the rubber asphalt.

The invention relates to the technical field of asphalt modification, in particular to self-healing modified asphalt, an asphalt mixture and a preparation method thereof, and the self-healing modified asphalt comprises the following raw materials: matrix asphalt, organic modified montmorillonite and bagasse fiber; the addition weight of the organic modified montmorillonite accounts for 0.5-5% of the weight of the matrix asphalt, the particle size of the organic modified montmorillonite is 0.5-30 [mu] m, and the organic modified montmorillonite is of a layered structure; the adding weight of the bagasse fibers accounts for 0.1-5% of the weight of the matrix asphalt. The organically modified montmorillonite-bagasse fiber modified asphalt has low viscosity, small softening point and high penetration, the modified asphalt has excellent performance in the crack repairing process, and the self-healing performance of the modified asphalt is remarkably improved by adding the organically modified montmorillonite and the bagasse fiber; the self-healing performance of the organic modified montmorillonite-bagasse fiber modified asphalt is obviously superior to that of rubber asphalt.

The utility model relates to the technical field of pitch, concretely relates to rubber pitch mixture ultraviolet ageing performance testing arrangement, including ultraviolet ageing experiment box body, the inner wall of ultraviolet ageing experiment box body is connected with the placing mechanism, the baffle of sliding sleeve is connected in the placing mechanism, the upper end surface of baffle is established with the sliding slot, the inner wall of baffle is connected with the sliding plate, the front of ultraviolet ageing experiment box body is fixedly installed with first support plate, the upper end surface of first support plate is fixedly installed with telescopic pneumatic cylinder, the outer arc face fixedly installed with first moving plate of telescopic pneumatic cylinder telescopic end symmetry both sides. The utility model, through telescopic pneumatic cylinder utilize first moving plate to pull the movable plate, the other end of movable plate pulls the connecting rod, when the connecting rod is stressed, can control the overturning of fluorescent ultraviolet lamp, realizes the ultraviolet ageing performance test to rubber pitch in multiple angles, guarantees more comprehensive when testing.

The utility model relates to the related technical field of asphalt production, in particular to a horizontal tank asphalt production device with a multi-connected mixer, which comprises a horizontal tank main body, a mixing mechanism is arranged on one side of the surface of the horizontal tank main body, and a stirring mechanism is arranged at one end of the horizontal tank main body. According to the horizontal tank asphalt production device with the multi-connected mixer, through the arrangement of the mixing mechanism, a first motor is started, matrix asphalt enters the multi-connected mixer through a matrix asphalt inlet and is pushed towards the left side through a screw, rubber powder enters the mixer through a rubber powder inlet and is mixed with the matrix asphalt, and the rubber powder is gradually and uniformly mixed through a third mixer, a second mixer and a first mixer; the rubber asphalt is conveyed to the rubber asphalt outlet and is sequentially connected with the four cavities, so that the mixing uniformity and sufficiency are ensured, meanwhile, a three-way valve is mounted at an outlet of the rubber asphalt outlet, and the mixed rubber asphalt can enter the stirring cavity through a straight-through pipeline of the three-way valve and can also enter the asphalt filter along another pipeline after the three-way valve is reversed.

This invention relates to the technical field of road engineering, and in particular to a method for converting old road structures into long-life pavement structures based on low-carbon cold recycling, comprising the following steps: S1, milling and recycling of the old pavement layer; S2, conversion of the semi-rigid base course system by vibratory compaction using a road roller to convert the semi-rigid base course into a granular flexible subbase course; S3, injection of a semi-flexible isolation layer; injection of a highly permeable slurry into the crushed base course to form a flexible recycled isolation layer; S4, forming of the flexible recycled base course; uniformly spreading a mixture of milled recycled material and new aggregate on the isolation layer, and simultaneously spraying and injecting bio-based modified emulsified asphalt; S5, laying of a low-carbon surface layer; spraying a modified emulsified asphalt tack coat onto the surface of the flexible recycled base course, followed by spreading a rubber asphalt concrete surface layer, and finally compacting it. The construction method of this invention solves the problems of "high carbon emissions, rapid recurrence of reflective cracks, and short lifespan" in traditional old road reconstruction and expansion.

The invention relates to the technical field of road engineering material preparation, in particular to a low-temperature rubber asphalt waste steel slag mixture preparation device and method, which comprises a tank body and three groups of screening mechanisms, and is characterized by further comprising a mounting seat fixedly mounted at the top of the tank body, and three groups of quantitative conveying mechanisms distributed at the top of the mounting seat at equal intervals, a top cover is fixedly mounted at the top of the mounting seat, a driving mechanism extending into the mounting seat is fixedly mounted at the top of the top cover, a stirring mechanism extending into the tank body is fixedly mounted at the bottom of the driving mechanism, and the driving mechanism drives the three quantitative conveying mechanisms and the stirring mechanism to operate synchronously. And the three groups of running quantitative conveying mechanisms respectively drive the three groups of screening mechanisms to run. Through cooperative work of the quantitative conveying mechanism, the screening mechanism and the stirring mechanism, rubber powder, low-temperature modified asphalt and waste steel slag raw materials can be precisely proportioned and conveyed, and the vibration roller screen improves the waste steel slag screening efficiency and prevents hole blockage.