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46 results about "Wearing course" patented technology
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The wearing course is the upper layer in roadway, airfield, and dockyard construction. The term 'surface course' is sometimes used, however this term is slightly different as it can be used to describe very thin surface layers such as chip seal. In rigid pavements the upper layer is a portland cement concrete slab. In flexible pavements, the upper layer consists of asphalt concrete, that is a construction aggregate with a bituminous binder. The wearing course is typically placed on the binder course which is then laid on the base course, which is normally placed on the subbase, which rests on the subgrade. There are various different types of flexible pavement wearing course, suitable for different situations.
Asphalt pavement paving and compaction cooperative control method
This invention discloses a method for coordinated control of asphalt pavement paving and compaction, relating to the field of asphalt pavement construction technology. Before operation, the invention inputs basic data to the central control unit and calibrates the lower limit of the allowable temperature for compaction. During paving, it collects the three-dimensional position coordinates of the paver, the temperature data of the loose layer, and the thickness data of the loose layer. During compaction, it collects the three-dimensional position coordinates and trajectory of the roller, the temperature data of the compacted layer, and the compaction degree value. The central control unit synchronizes and matches the data, calculates the temperature drop rate, and issues elevation adjustment and additional compaction commands after comparing deviations. This invention enables precise coordination between paving and compaction processes, real-time calculation of the temperature drop rate and remaining compaction time, automatic elevation adjustment, and issuance of additional compaction commands, improving the construction quality and stability of ultra-thin wearing course layers, reducing early-stage defects, and extending the service life of the pavement.
Owner:CCCC THIRD HIGHWAY ENG CO LTD
Modified bitumen for durable thin surfacing and method of making, use, wearing course
The application belongs to the technical field of polymer materials, and discloses a modified asphalt for durable thin-layer pavement, a preparation method, application and wearing layer thereof; the modified asphalt comprises the following components in mass fraction: 100 parts of asphalt, 10-20 parts of thermoplastic elastomer, 2-5 parts of tackifier and an additive; the tackifier is phthalonitrile resin; the thermoplastic elastomer contains not less than 90 wt% of SBS; the modified asphalt is synergistically modified by the tackifier and the thermoplastic elastomer, so that the obtained modified asphalt has excellent high-temperature performance, low-temperature performance and aging resistance, and is particularly suitable for durable thin-layer pavement; and the wearing layer prepared by the modified asphalt has excellent fatigue durability.
Owner:MAINTENANCE BRANCH OF GUANGZHOU HIGHWAY ENGINEERING GROUP CO LTD +2
An asphalt pavement road surface texture modeling method based on a three-dimensional discrete element model
ActiveCN119740450BGeometric CADDesign optimisation/simulationClassical mechanicsStructural engineering
The application relates to a kind of asphalt pavement road surface texture modeling methods based on three-dimensional discrete element model, comprising: step S1: selecting representative coarse aggregate from the aggregate constituting asphalt pavement wearing course, obtaining the surface topography as the first real aggregate profile model after scanning each selected coarse aggregate;Step S2: based on the first real aggregate profile model, the three-dimensional discrete element model of asphalt mixture is constructed as the asphalt pavement model, the micro-mechanical properties between the aggregate particles in the asphalt pavement model are given, and the texture parameters and the inter-particle porosity of the asphalt pavement model are calculated;Step S3: the surface texture parameters and the inter-particle porosity of the real asphalt pavement with the same aggregate and gradation are calculated, and compared with the texture parameters and the inter-particle porosity of the asphalt pavement model, if the error is too large, then return to step S2 to adjust the micro-mechanical properties between the aggregate particles in the asphalt pavement model.Compared with the prior art, the application can accurately simulate pavement texture and establish the corresponding relationship between wearing course texture and skeleton.
Owner:SOUTHEAST UNIV
A detachable combined steel bridge deck pavement structure
The present application relates to a kind of detachable combined steel bridge deck pavement structure, including steel bridge deck, corrugated steel plate, T-shaped stiffener, ribbed steel bar, ultra-high performance concrete, asphalt concrete wearing layer, high-strength bolt;Wherein, the corrugated steel plate is connected with the top plate of steel bridge deck by high-strength bolt in flat section, and corrugated section is arranged corresponding to longitudinal stiffener of steel bridge deck;The web of T-shaped stiffener is perforated, and the weld is connected with the flat section of corrugated steel plate in the direction of bridge;The ribbed steel bar is passed through the web of T-shaped stiffener perforated, then pours ultra-high performance concrete, realizes and steel bridge deck joint action;Finally, pour asphalt concrete wearing layer, form detachable combined steel bridge deck pavement structure.The present application provides a kind of detachable combined steel bridge deck pavement structure design reasonable, with the advantages such as large rigidity, light weight, easy to disassemble, can effectively improve the fatigue performance of steel bridge deck.
Owner:SUZHOU UNIV OF SCI & TECH +1
High-viscoelastic asphalt mixture laying equipment for ultra-thin overlay construction
The utility model is applicable to the technical field of asphalt paving, and provides high-viscoelastic asphalt mixture paving equipment for ultra-thin overlay construction, which comprises a machine body, a conveying chain arranged on the machine body and used for conveying asphalt mixture, and two hoppers arranged on the machine body, overturning driving elements are arranged between the left side surface and the right side surface of the machine body and the lower surfaces of the two hoppers located on the two sides of the conveying chain, retractable baffles are arranged in the sides, close to the conveying chain, of the hoppers, rotating bases are arranged on the front sides and the rear sides of the hoppers, and the rotating bases are installed on the machine body; according to the high-viscosity and high-elasticity asphalt mixture conveying device, high-viscosity and high-elasticity asphalt mixtures in the hopper are blocked through the retractable baffles, the problem that the high-viscosity and high-elasticity asphalt mixtures fall onto a conveying chain, and consequently the conveying chain is bent is solved, and the high-viscosity and high-elasticity asphalt mixture conveying device is simple in structure, convenient to use and high in practicability. And normal conveying of the high-viscoelastic asphalt mixture is ensured.
Owner:河南省光大路桥工程有限公司
Self-adhesive pavement local disease repair blanket
The utility model relates to the technical field of pavement repair, and discloses a self-adhesive pavement local disease repair blanket which comprises a repair blanket body and a limiting device, the repair blanket body comprises an anti-wearing layer, a high-viscosity asphalt layer, an anti-crack layer and a bonding layer, and the anti-wearing layer, the high-viscosity asphalt layer, the anti-crack layer and the bonding layer are sequentially arranged from top to bottom. The top surface of the high-viscosity asphalt layer is bonded with the bottom surface of the anti-wearing layer, the bottom surface of the high-viscosity asphalt layer is bonded with the top surface of the anti-cracking layer, the bottom surface of the anti-cracking layer is bonded with the top surface of the bonding layer, and the limiting device is arranged on the anti-wearing layer. Clamping blocks can be adjusted to different positions through sliding grooves, sliding blocks and first extension springs, repair blanket bodies with different rolling sizes can be conveniently adapted, the distance between two fixing rods can be adjusted according to the use requirements of personnel through arrangement of a connecting assembly, and therefore the repair blanket bodies with different widths can be adapted.
Owner:CHONGQING JIAOTONG UNIV
A road surface wearing layer material based on ceramic solid waste and a preparation method and application thereof
The application discloses a kind of road surface wearing layer materials based on ceramic solid waste and its preparation method and application, belong to the technical field of pavement surface layer material in road engineering.The application solves the defects such as poor bonding effect of ceramic solid waste particles and matrix asphalt in traditional mixture process, significant attenuation of mixture water stability, and utilizes ceramic solid waste to reduce the problems caused by the decline of road performance while fully exerting the advantages of material thermal resistance characteristics and anti-skid characteristics.The application uses thermosetting epoxy asphalt as binder, replaces mineral aggregate with ceramic solid waste broken aggregate, adopts pellet pressing type construction process, so that the prepared road surface wearing layer material has good heat conductivity, and correspondingly improves the fatigue strength of wearing layer material, has excellent anti-skid performance and wear resistance.
Owner:HARBIN INST OF TECH
Construction method for repairing airport pavement and sandwich composite structure
The invention discloses a construction method for repairing a broken slab of an airport pavement and a sandwich composite structure. The construction method comprises the following steps: S1, prefabricating a cement concrete pavement slab serving as a main body of a new pavement slab according to parameters; s2, a cement laitance layer on the surface is removed, and an interface binder is brushed after the cement laitance layer is removed; s3, a wearing layer is poured, and a flexible and elastic polymer composite material is adopted; s4, performing anti-skid treatment on the upper surface of the wearing layer to form an anti-skid layer; s5, the damaged old pavement panel is removed; s6, the interface of the base layer is coated with the interface binder; s7, a bed slurry layer is arranged after the interface binder is brushed; s8, the prefabricated new pavement slab is installed on the bed mortar layer and leveled, and then joints are filled; s9, after standing maintenance, joint cutting is conducted, and joint sealing materials are filled; and S10, opening the traffic after cleaning the site. Compared with the prior art, according to the new pavement formed through construction, the combining capacity of the new pavement slab and the old pavement slab or the base layer serving as the base plane is high, and the overall abrasion resistance and durability are remarkably improved.
Owner:NINGBO ROABY TECH INDAL GROUP
Method for asphalt thin layer overlay construction of cement bridge decks and pavements and a pouring device
The present application relates to a method for asphalt thin layer overlay construction of cement bridge and pavement and a crack pouring device, the method comprising: 1) old cement bridge and pavement detection and treatment; 2) bonding layer construction: spraying modified emulsified asphalt on the old cement bridge and pavement to form a bonding layer, 3) ultra-thin wearing layer paving: using a synchronous paver, paving on the bonding layer to form an asphalt thin layer overlay, the paving thickness is 1.5-2.5 cm; 4) rolling and opening to traffic: using a steel wheel roller to roll the pavement for 2-4 times. The interlayer bonding strength between the added asphalt thin layer overlay and the old cement pavement is greater than or equal to 1.2 MPa, effectively preventing delamination; the asphalt thin layer overlay can effectively inhibit the generation and expansion of reflection cracks, has excellent high and low temperature performance and water stability, the pavement added thickness is significantly reduced, only 1.5-2.5 cm, reducing the material consumption, structural load and highway auxiliary facility adjustment.
Owner:FUJIAN TRANSPORTATION RES INST CO LTD +1
Modified emulsified asphalt mixture and preparation method of ultrathin wearing layer
The invention discloses a modified emulsified asphalt mixture and an ultrathin wearing layer preparation method, and belongs to the field of road engineering, the modified emulsified asphalt mixture is prepared from the following components by weight: 10-16 parts of emulsified asphalt, 6-9 parts of epoxy resin, 3-9 parts of a flexibilizer, 0.1-0.5 part of a coupling agent, 90-110 parts of aggregate, and 10-15 parts of a composite filler; the composite filler is one or a mixture of furnace bottom ash, fly ash and polyamide fiber, and through physical crosslinking of the flexibilizer and chemical curing of the epoxy resin, the toughness and bonding performance of the emulsified asphalt are remarkably enhanced; meanwhile, the basalt aggregate is pretreated by adopting the silane coupling agent, so that the surface characteristics of the aggregate are optimized, the interface bonding force between the aggregate and the modified asphalt is greatly improved, and the problem of insufficient performance of a traditional material under traffic load is fundamentally solved.
Owner:ZHILUTONG TECHNOLOGY CO LTD +1
Large-area bridge deck pavement rapid repairing structure and construction method
The invention discloses a large-area bridge deck pavement rapid repairing structure and a construction method. The structure comprises a re-paved asphalt pavement layer, a high-performance concrete cast-in-place layer, an original concrete leveling layer and a height self-adaptive adjustment support system. An ultra-thin wearing layer or an asphalt concrete surface layer is selected as the re-paved asphalt pavement layer, the high-performance concrete cast-in-place layer is composed of high-performance fiber concrete and a reinforcing mesh, and the height of the support system is matched with the thickness of a bridge deck pavement system so as to ensure that the elevation is not changed before and after bridge deck pavement repair. According to the structure, only the leveling layer of about 1cm is finely milled and planed on the surface layer, the high-performance concrete cast-in-place layer acts together with the original concrete leveling layer and the main beam, and the weight reduction effect of the bridge deck pavement layer is achieved through self-adaptive matching of the height of the support system. The problems that according to a traditional scheme, the construction period is long, the number of on-site operating personnel is large, the clearing volume of construction waste is large, an original bridge is prone to being damaged and the like are solved, and the construction efficiency of the operation expressway bridge floor is seriously influenced are solved.
Owner:山西省交通科技研发有限公司 +1
Rapid maintenance method for pavement pit slot covered with ultra-thin wearing layer
The invention relates to the technical field of pavement pothole rapid maintenance methods, in particular to a pavement pothole rapid maintenance method covering an ultrathin wearing layer, which comprises the following steps: (1) preparing a modified cold patch material; (2) preparing an ultrathin wearing layer material; (3) cleaning the pit slot; (4) coating a bonding layer; (5) filling a cold patch material; (6) laying an ultrathin wearing layer; (7) curing; (8) opening traffic; according to the invention, the modified cold patch material and the ultrathin wearing layer are innovatively combined, so that the contradiction between the material performance and the construction process is ingeniously solved. The use of the modified cold patch material solves the problem of insufficient strength of the traditional cold patch material, and the introduction of the ultrathin wearing layer greatly improves the durability and aging resistance of the repaired area. The multi-layer structural design not only realizes the complementation of the performance of each component, but also generates a remarkable synergistic effect.
Owner:SHANGHAI PUJIANG BRIDGE & TUNNEL OPERATION MANAGEMENT CO LTD +2
High-viscosity and high-elasticity modified emulsified asphalt stirrer for construction of cold-mixed and cold-laid ultrathin wearing layer
The utility model provides a high-viscosity and high-elasticity modified emulsified asphalt stirrer for cold-mixing and cold-paving ultrathin wearing layer construction, which relates to the technical field of stirrers and comprises a stirring disc body, a stirring shaft is rotatably connected in the stirring disc body, a stirring frame is mounted on the stirring shaft, two groups of driving guide rails are arranged on the upper side and the lower side of the stirring frame in parallel, and the driving guide rails are connected with the stirring disc body. A driving guide rail is installed on the upper side of the stirring disc body, a stirring assembly is installed on the driving guide rail in a sliding mode, a driving mechanism is installed on the upper side of the stirring disc body and comprises a driving motor, an eccentric crankshaft and a plurality of driving swing rods, the stirring assembly comprises a driving sliding block, a stirring rod and a plurality of stirring blades, and the driving swing rods are pivoted between the eccentric crankshaft and the driving sliding block. The driving sliding block is installed on the driving guide rail in a sliding mode. The stirring radius of the stirring assembly can be changed by rotating the driving motor, so that the asphalt stirring uniformity is improved.
Owner:NINGXIA HIGHWAY ENG SUPERVISION & CONSULTATION CO
A highway subgrade ultra-thin wearing layer spraying device
The utility model provides a kind of highway subgrade ultra-thin wearing course spraying device, it is related to asphalt pavement repair field, comprising: spraying assembly, the spraying assembly is by holding mechanism and spraying mechanism composition, spraying assembly can be by monitoring the moving state of independent traction vehicle's moving wheel, realize the automation start-stop of material spraying function, to realize the function of automatic material spraying of vehicle, vehicle stops material and terminates spraying, without manual control, it is flexible and convenient to use, and under the action of spraying assembly, spraying rod can always keep fixed interval with roadbed and carry out the function of material spraying, construction quality is high, solve the start-stop of material spraying of existing spraying device, which is manually controlled in cab, which leads to material spraying cannot be started and stopped according to the moving state of vehicle, and it is easy to appear the problem that vehicle stops material and still sprays or vehicle material is not timely sprayed.
Owner:SHANDONG LUTAI HIGHWAY ENG CO LTD
Construction equipment for ultrathin asphalt wearing layer
The utility model relates to the field of ultra-thin asphalt wearing layer construction, in particular to construction equipment for an ultra-thin asphalt wearing layer, which comprises a frame, a front frame, a cleaning roller, a dust cover, a dust suction pipe and a laying mechanism. When the vehicle frame moves forwards, the connecting arm drives the rolling sweeping rolling wheel to be close to the road surface to sweep the road surface, and meanwhile the dust suction pipe sucks dust and garbage swept out by the sweeping rolling wheel into the collecting cavity to be collected. And the laying box rotates downwards around the positioning pin, when the laying box moves along with the vehicle frame, the laying box horizontally clings to the ground and translates, in the process, the asphalt material in the laying box uniformly flows out of the discharging opening, and the asphalt material flowing out can be flatly laid on the road surface through scraping of the laying box at the discharging opening. Before an ultra-thin asphalt wearing layer is laid, the road surface can be automatically swept through the sweeping idler wheel and the dust suction pipe, and sweeping quality and efficiency are improved.
Owner:FUJIAN NANXING CONSTR ENG CO LTD
A chemically modified high-viscosity and tough asphalt and its preparation method
This invention provides a chemically modified high-viscosity and tough asphalt and its preparation method, comprising the following components in parts by weight: 100 parts base asphalt, 3-8 parts styrene-butadiene-styrene block copolymer, 2-10 parts composite petroleum resin, 0.1-4 parts maleic anhydride, 0.1-2 parts polyphosphoric acid, 0.05-0.15 parts crosslinking stabilizer, and 0.1-1 parts composite antioxidant. This modified high-viscosity and tough asphalt, obtained through chemical composite modification, not only possesses excellent high-temperature deformation resistance, elastic recovery performance, low-temperature flexibility, and fatigue resistance, but also exhibits improved compatibility between the asphalt and the modifier through chemical modification. The preparation method of this composite modified high-viscosity and tough asphalt is simple and yields excellent performance, making it suitable for ultra-thin wearing courses, heavy-duty asphalt pavements, bridge deck paving, and other fields.
Owner:GUANGXI COMM PLANNING SURVEYING & DESIGNING INST
Steel bridge deck pavement structure and construction method thereof
ActiveCN115701466Bno flowGuaranteed thicknessIn situ pavingsPaving gutters/kerbsSand blastingBridge deck
The application discloses a steel bridge deck pavement structure and a construction method thereof. The method comprises the following steps: S1, preparing at least two steel bridge deck plates; S2, sequentially performing the following construction procedures on each steel bridge deck plate: (1) performing sand blasting rust removal treatment on the surface of the steel bridge deck plate and welding shear pins; (2) laying transverse steel bars and longitudinal steel bars to form a grid structure layer which is interlaced with each other; S3, arranging reinforcing steel bars and a toothed end mold at the joint of the at least two steel bridge deck plates; S4, respectively pouring the at least two steel bridge deck plates to form an ultra-high performance concrete pavement layer; and S5, laying an abrasion layer on the ultra-high performance concrete pavement layer. The application can improve the compressive strength, shearing strength and fatigue resistance of the ultra-high performance concrete pavement layer and ensure that the ultra-high performance concrete pavement layer does not flow and is not distributed in the pouring process, so that the thickness of the ultra-high performance concrete pavement layer is ensured.
Owner:HONGRUN CONSTRUCTION GROUP CO LTD
Environment-friendly active anti-freezing agent, ultra-thin wearing layer mixture and preparation method of ultra-thin wearing layer mixture
The invention relates to an environment-friendly active anti-freezing agent, an ultrathin wearing layer mixture and a preparation method of the environment-friendly active anti-freezing agent, the environment-friendly active anti-freezing agent has a core-shell structure and is composed of a core material and a shell material, the core material is composed of one or more of potassium formate and calcium magnesium acetate; the shell material is one or more of polyorganohydrogen siloxane and acrylic ester; the anti-freezing agent is prepared by a melt blending-crushing process, and isovolumetrically partially replaces fine aggregate and mineral powder in an asphalt mixture according to particle size distribution. The environment-friendly active anti-freezing agent has the beneficial effects that the environment-friendly active anti-freezing agent provided by the invention is low in preparation cost, environment-friendly and pollution-free, the current situation that chlorine-containing snow-melting agents such as industrial salt are used in the aspect of removing ice and snow on roads at present to corrode the roads and damage the surrounding ecological environment can be avoided, and an anti-freezing effect can be generated for a long time through one-time construction; and a large amount of manpower and material resources can be saved.
Owner:HUBEI ROAD & BRIDGE GRP CO LTD
Permeable paving material and method of installation
A permeable paving structure that includes a stabilizer, a base course layer, and a wearing course layer. The stabilizer is adapted to be engaged with a ground surface in at least two planes. The base course layer operably engages with the stabilizer, and the wearing course layer operably engages with the base course layer and with the stabilizer. The stabilizer is configured to stabilize the base course layer and the wearing course layer in the at least two planes.
Owner:PUREPAVE TECHNOLOGIES INC
Basalt mixture of basalt fiber compounded rock asphalt and construction method of asphalt mixture
The invention relates to an asphalt mixture of basalt fiber compounded with rock asphalt and a construction method of the asphalt mixture. The asphalt mixture is formed by mixing composite modified emulsified asphalt, activated buton rock asphalt, modified basalt fiber, basalt aggregate, mineral powder, cement, water and the like. Through the synergistic enhancement effect of the modified basalt fiber, the rock asphalt and other components, the prepared asphalt mixture can be suitable for a cold-mixed and cold-laid ultrathin wearing layer, and the high and low temperature performance of the asphalt mixture can be enhanced. The construction method comprises the processes of infrared thermal imaging targeted disease treatment, three-sensing integrated intelligent paving, three-stage grading compaction, intelligent health maintenance monitoring and the like. The high-temperature dynamic stability of the mixture is larger than 3000 times / mm, the low-temperature maximum flexural-tensile strain is larger than or equal to 2800mu epsilon, the anti-sliding and wear-resisting performance is excellent, the mixture material and the cold mixing process are low-carbon and environment-friendly, the construction process is accurate and efficient, and the method is suitable for maintenance engineering of highway pavements.
Owner:FUJIAN TRANSPORTATION RES INST CO LTD
Permeable paving material and method of installation
A permeable paving structure that includes a stabilizer, a base course layer, and a wearing course layer. The stabilizer is adapted to be engaged with a ground surface in at least two planes. The base course layer operably engages with the stabilizer, and the wearing course layer operably engages with the base course layer and with the stabilizer. The stabilizer is configured to stabilize the base course layer and the wearing course layer in the at least two planes.
Owner:PUREPAVE TECHNOLOGIES INC
Sealing under mastic asphalt
PendingDE102024137610A1In situ pavingsPolyurea/polyurethane coatingsPolymer sciencePolyaspartic acid
Methods for partial or full-surface sealing of drivable concrete traffic surfaces comprising the following work steps: 1. Substrate treatment with a primer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 2. Application of a liquid sealing layer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 3. Application of an adhesive layer based on aliphatic polyisocyanates and polyaspartic acid ester mixtures 4. Sprinkle quartz sand into the bonding layer 5. Application of at least one mastic asphalt wearing course characterized in that polyaspartic acid ester mixtures are used, containing at least i) a polyaspartic acid ester of the structure ii) at least one further amino-functional polyaspartic acid ester of the general structural formula in which R1 and R2 independently represent a methyl group or an ethyl group and X represents a divalent organic residue formed by removing the amino groups from an amino polyether of the general structural formula, which also includes corresponding constitutional isomers and n represents a number from 2 to 8, preferably 2.5 to 6.5 and particularly preferably 2.5 to 4.5.
Owner:FRANKEN SYST
Ultrathin asphalt wearing layer dynamic stability correction method considering non-uniform load
PendingCN121434523AMaterial heat developmentMaterial strength using tensile/compressive forcesRoad engineeringClassical mechanics
The invention discloses an ultra-thin asphalt wearing layer dynamic stability correction method considering non-uniform load, which comprises the following steps: step 1, comparing vertical stress of a pavement structure containing an ultra-thin wearing layer under the conditions of non-uniform load and uniform load, and calculating a vertical stress influence coefficient, establishing a vertical stress influence coefficient empirical model considering the thickness effect of the ultrathin wearing layer; 2, grading correction factors are selected according to road engineering grades and / or climate conditions; 3, calculating a non-uniform load influence coefficient based on a vertical stress influence coefficient empirical model and a selected grading correction factor; and 4, correcting the dynamic stability of the ultra-thin wearing layer material obtained by carrying out the rutting test by using the non-uniform load influence coefficient to obtain the corrected dynamic stability of the ultra-thin wearing layer material. According to the method, the high-temperature rutting resistance of the asphalt mixture under the action of the non-uniform load can be evaluated, so that the material strength and fatigue design of the ultrathin wearing layer are more accurate.
Owner:SOUTHEAST UNIV +1
Road base construction method
This invention discloses a method for constructing a road base course, comprising: Step 1, removing debris from the surface of the original road base course and horizontally pressing and inserting steel pipe piles from the outside to the inside of the original road base course; Step 2, leveling the surface of the original road base course and setting a drainage layer on the filled surface; Step 3, setting a surface support layer on the surface of the drainage layer; Step 4, setting a surface wear layer on the surface of the surface support layer. This invention can effectively repair subsided road base courses, and by reinforcing the surface layer, it improves strength, increases the stability of the road base course, ensures the structural strength of the road base course, and extends the service life of the road base course.
Owner:CITIC CONSTR
METHOD FOR CONSTRUCTING A WEARING COURSE
The present invention relates to a method for constructing a road surface wearing course, comprising the following steps: preparing a cationic emulsion E1 of hydrocarbon binder, formulated from a hydrocarbon binder having a needle penetration at 25°C less than or equal to 100 1 / 10 mm; applying a layer of cold-mix asphalt to a suitable substrate; compacting the layer applied in step b); applying the cationic emulsion E1 from step a) to the surface of the asphalt layer compacted in step c). The present invention also relates to the wearing course thus obtained and the use of the cationic emulsion E1 of hydrocarbon binder to improve the early-age flaking resistance of cold-mix asphalt.
Owner:VINCI CONSTR
Simultaneous application device for emulsified asphalt mixture paving of ultra-thin wearing course road surface
This utility model discloses a synchronous spraying device for emulsified asphalt in ultra-thin wearing course asphalt mixture paving, solving the problem in the prior art where the number of nozzles remains constant when the spraying width of the outer spraying device is adjusted by rotation, resulting in uneven nozzle coverage density. It includes an outer spraying device positioned on the outer side of the paver's travel path, used to spray emulsified asphalt onto the outer area of the travel path. The outer spraying device is mounted on the paver via a crank. Driven by a rotary drive mechanism, the crank and the outer spraying device rotate as a whole around an axis between the crank and the paver. The axis is vertically oriented, located inside the travel mechanism and close to its center line. When the crank drives the outer spraying device to rotate around the axis, the number of nozzles covering the corresponding outer area on the outer spraying device can increase or decrease accordingly with the direction of rotation.
Owner:中电建路桥集团有限公司
Paving vehicle for surface treatment of cold paving wearing layer
PendingCN121700730AClimate change adaptationRoads maintainenceStructural engineeringMechanical engineering
Owner:YUNNAN FUYAN EXPRESSWAY CO LTD +1
Asphalt pavement wearing layer surface treatment device and treatment method
The invention relates to an asphalt pavement wearing layer surface treatment device and treatment method, and belongs to the technical field of pavement construction. The device comprises a rack, a transmission box, a driving shaft, two cutting assemblies, an outer shell, a crushing assembly and a suspension connecting frame. The driving shaft is driven by power of a tractor, and a spline shaft I and a cutting blade of the cutting assembly are driven to rotate through a gear set in the transmission box and used for cutting a step groove in a road surface. Meanwhile, the driving shaft drives a spline shaft II and a spiral blade of the crushing assembly in the outer shell to rotate through transmission of a chain wheel, a chain and a worm and gear, and is used for cleaning the milling waste in the step groove. The inclination angle of the machine frame and the outer shell is adjusted through the hydraulic cylinder, and continuous operation of cutting and then cleaning is achieved. Precise cutting and efficient cleaning of the step groove can be automatically completed only by means of a single power source of a tractor, the problems that existing equipment is not accurate in operation, low in efficiency and high in cost are effectively solved, and the device is particularly suitable for construction of an ultra-thin wearing layer of an asphalt pavement.
Owner:HUNAN TONGHE ENG CO LTD
Steel bridge deck pavement system and method of construction thereof
This invention discloses a steel bridge deck pavement system and its construction method. The method includes the following steps: S1: Dividing the steel bridge deck pavement system into a main bridge deck and approach bridge decks; S2: Dividing the main bridge deck into six steel panels and performing the following construction procedures: shear stud welding, steel mesh laying, ultra-high performance concrete pouring and curing; S3: Laying the main bridge deck wearing layer; S4: Dividing the approach bridge deck into a first approach bridge deck and a second approach bridge deck and performing the following construction procedures: constructing concrete crash barriers on both sides of the approach bridge deck, shear stud welding, steel mesh laying, ultra-high performance concrete pouring and curing; S5: Laying the first approach bridge wearing layer; S6: Laying the second approach bridge wearing layer. This invention can reasonably process the steel bridge deck pavement system, meet the construction period requirements, improve the compressive and shear strength and fatigue resistance of the pavement layer, and ensure that the pavement layer does not flow or distribute during the pouring process to ensure the thickness of the pavement layer.
Owner:HONGRUN CONSTRUCTION GROUP CO LTD
CMCA ultra-thin wearing layer pavement and construction method thereof
The application discloses a CMCA ultra-thin wearing layer pavement and a construction method thereof. The CMCA ultra-thin wearing layer pavement comprises, from bottom to top, a crack grouting treatment layer, a high-strength bonding layer and a CMCA mixture layer. After disease treatment of the original pavement, the high-strength bonding layer material is uniformly sprayed, and the spraying amount is 0.3-0.6 kg / m2; after the high-strength bonding layer is surface-dried, the 1.5-2.5 cm-thick CMCA mixture layer is uniformly spread; and after the CMCA mixture is surface-dried, the traffic is opened. Compared with the existing cold-mixed and cold-paved ultra-thin overlay maintenance technology, the technology greatly improves the skid resistance and service life of the wearing layer, and the bonding strength is also significantly improved, effectively solving the problems of the current cold-mixed and cold-paved ultra-thin overlay, such as large stone falling, peeling, skid resistance attenuation and crack reflection, and simultaneously having the advantages of long service life, high bonding strength, good water damage resistance and the like of the high-viscosity and high-elasticity ultra-thin hot overlay.
Owner:山西交控科技转化有限公司