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191 results about "Pavement engineering" patented technology
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Pavement engineering is a branch of civil engineering that uses engineering techniques to design and maintain flexible (asphalt) and rigid (concrete) pavements. This includes streets and highways and involves knowledge of soils, hydraulics, and material properties. Pavement engineering involves new construction as well as rehabilitation and maintenance of existing pavements. Maintenance often involves using engineering judgment to make maintenance repairs with the highest long-term benefit and lowest cost. The Pavement Condition Index (PCI) is an example of an engineering approach applied to existing pavements. Another example is the use of a falling weight deflectometer (FWD) to non-destructively test existing pavements. Calculation of pavement layer strengths can be performed from the resulting deflection data. The two methods - empirical or mechanistic is used to determine pavement layer thicknesses.
Permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation
The invention discloses permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation. The permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste is characterized in that recycled coarse aggregates and ceramsites are taken as coarse aggregates of concrete, an appropriate amount of pretreated industrial and agricultural solid waste such as industrial waste, agricultural waste, household garbage and the like is taken as an admixture, a cementing agent is prepared from cement, water, a superplasticizer and a reinforcement material, and the materials are mixed with a preset stirring process and preparation method, so that ecological concrete with good mechanical property, permeable property and durability is produced. According to the concrete, the waste utilization rate is up to about 80%, the concrete is environment-friendly, locally available materials can be used, the economic benefit is remarkable, ceramist pore is smaller, and sewage can be continuously and stably treated, so that the concrete is commonly used in water environment comprehensive improvement engineering; and besides, the concrete has light weight, high strength and good water permeability and can be also used in permeable pavement engineering such as a sidewalk, a parking lot and the like as well as plant engineering such as ecological riverway slope protection, roof landscape planting and the like.
Owner:YANGZHOU UNIV
Method and system for detecting asphalt mixture
InactiveCN101153850AEfficient automatic detectionLow costImage enhancementMaterial analysis by optical meansImaging processingPavement engineering
The invention discloses a detection method of bituminous mixture, including the following steps: digital image collection of bituminous mixture is completed; image processing of the acquired digital image is completed to obtain the content of compositions of the bituminous mixture. Moreover, the invention also discloses a detection system for the bituminous mixture. Both the method and the system can complete effective separation and extraction of bitumen, airgap, aggregate and aggregate particle of different particle diameter and realize direct determination and calculation of volumetric composition characteristic parameter of the bituminous mixture through converting the obtained characteristic parameter into volume ratio; moreover, the invention improves the mechanical property of the bituminous mixture and provides reliable basis for the scientificity in bituminous pavement engineering research.
Owner:CHANGAN UNIV
Asphalt macadam stress absorption layer and construction method thereof
InactiveCN101148856AStress Absorption and ReductionEasy to useIn situ pavingsPolymer modifiedChipseal
The present invention relates to asphalt road engineering, and is especially one stress absorbing asphalt macadam layer and its construction process. The stress absorbing asphalt macadam layer can absorb and reduce the stress of asphalt road surface or composite road surface and weaken the transmission of cracks to the surface asphalt layer. It consists of one macadam layer, one stress absorbing and binding layer and one connecting layer from top to bottom. Its construction process includes the steps of spreading connecting layer material onto the base layer, spreading the stress absorbing and binding layer and spreading the macadam layer. The stress absorbing and binding layer has material of polymer modified emulsified asphalt, high viscosity emulsified asphalt, hot SBS modified asphalt or rubber modified asphalt; and the connecting layer has material of kerosene diluted asphalt, high permeability emulsified asphalt, concrete interface adhesive, polymer modified emulsified asphalt or hot modified asphalt.
Owner:徐培华
High-modulus bituminous mixture additive and preparation method thereof
ActiveCN103773006AImprove dynamic stabilityImprove static modulusBuilding insulationsPolymer sciencePavement engineering
The invention discloses a high-modulus bituminous mixture additive and a preparation method thereof. The high-modulus bituminous mixture additive is composed of a modifying main agent, butadiene styrene rubber, polyethylene paraffin, a filling material, an anti-aging component, and a plasticizing component according to a mass percentage of 100:(10-30):(15-40):(40-80):(2-6):(5-20); wherein the modifying main agent consists of one or more components selected from waste PE, polypropylene, and EVA. The preparation method comprises the following steps: evenly mixing the modifying main agent, butadiene styrene rubber and polyethylene paraffin at a temperature of 160 to 190 DEG C, adding the filling material, anti-aging component and plasticizing component into the mixture, evenly mixing under a certain rotation speed, then extruding the mixture by a screw extruder, cooling at the room temperature, and finally cutting into particles. The high-modulus bituminous mixture additive is mainly applied to pavement projects such as new construction and reconstruction of high grade roads and heavy traffic roads, can improve the dynamic stability, static modulus, dynamic modulus and shearing resistant performance of bituminous mixture, thus prominently reduces the damages of rut, displacement, or the like, and can improve the low-temperature anti-cracking performance of high-modulus bituminous mixture at the same time.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
Road surface structure of felexiable fibre emulsifying asphalt stable material as base and construction method thereof
InactiveCN100999890AReduce dosageSave energy resourcesPaving reinforcementsIn situ pavingsFrostSurface layer
The present invention relates to road structure and construction technology, and is especially road structure with flexible fiber and emulsified asphalt stabilized aggregate layer as the base layer and its construction process. The road structure includes one bottom layer; one base layer and one paved surface layer, and the base layer of rolled flexible fiber and emulsified asphalt stabilized aggregate is formed through mixing flexible fiber, emulsified asphalt, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber and emulsified asphalt stabilized aggregate has improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance, erosion resistance and water stabilty, and doubled antifatigue performance. The road with the said base layer has raised performance and increased service life.
Owner:马银华 +3
Road surface structure of rolling flexiable fibre cement concrete as based and construction method thereof
InactiveCN100999888AReduce plastic shrinkageEnhanced resistance to shrinkage crackingPaving reinforcementsIn situ pavingsSurface layerFrost
The present invention relates to road structure and construction technology, and is especially road structure with rolled flexible fiber cement concrete layer as the base layer and its construction process. The road structure includes one bottom layer; one base layer and one paved surface layer, and the base layer of rolled flexible fiber cement concrete is formed through mixing flexible fiber, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber cement concrete has obviously improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance and erosion resistance, and doubled antifatigue performance. The road with the base layer of rolled flexible fiber cement concrete has raised performance and increased service life.
Owner:易志坚 +3
High modulus asphalt concrete additive agent
The invention discloses a high modulus asphalt mixture additive (Rohillard PAC-M), the formula is as follows: polyethylene PE: 20 to 70 percent, polyester PES: 0.9 to 10 percent, polypropylene PP: 15 to 60 percent, polyvinyl chloride PVC: 20 to 50 percent, chlorinated polypropylene PP-C: 5 to 10 percent, rubber: 3 to 5 percent, asphalt: 1 to 6 percent, cellulose: 1 to 4.5 percent and auxiliary agent: 0.1 to 0.5 percent. The product is characterized in that the polymerization temperature is T, T is not less than 130 DEG C and not more than 190 DEG C, and the particle size d of the product is is not less than 1mm and not more than 6mm, the particles are granular (90 percent of the product). The color / shape of the product is dark brown. The high modulus asphalt mixture additive is mainly applied in the new construction and the overhaul of high-grade highways, heavy traffic roads and transportation main trunk line roads, as well as the curing and other road projects. The high modulus asphalt mixture additive is mainly characterized in that: the high modulus asphalt mixture additive has great advantages of high-temperature rut resistance, low-temperature cracking resistance, prevention of water damage and durability.
Owner:北京玖威信达技术有限公司
Integrated repairing equipment for road surface engineering
ActiveCN107761526AEasy dischargeImprove flood drainage capacityRoad cleaningRoads maintainencePavement engineeringRoad engineering
The invention provides integrated repairing equipment for road surface engineering. The integrated repairing equipment comprises an equipment body, a flood drainage pipeline structure, a fixing clamping ring, an intelligent control alarm device, a road surface level detecting device, a road surface projection polishing device, a broken stone cleaning device, a broken stone collecting device, a water spraying device, front wheels, a car backing camera and a road rolling wheel. The flood drainage pipeline structure is mounted on the outer side of the upper portion of the equipment body through the fixing clamping ring. Rapid pumping, flow guiding and draining of the accumulated water on the road surface are facilitated through arrangement of a flood drainage guide pipe and a water suction pump, and thus the flood drainage effect is improved; impurities in the accumulated water are conveniently prevented from entering the flood drainage guide pipe through arrangement of an adjusting hoseand a filtering head; the projection part on the road surface can be conveniently polished and cleaned through arrangement of a polishing wheel, a stainless steel brush head and a polishing motor, sothat the road surface is more level and smooth; and broken stones are conveniently prevented from hitting against a broken stone collecting frame directly to cause large noise through arrangement of abroken stone containing bag.
Owner:广西长顺建设工程有限责任公司
Anti-lateral seepage asphalt pavement water seepage device with constant-pressure variable head and method
ActiveCN106769774AEliminate the effects ofAvoid influencePermeability/surface area analysisWater conservationWater dischargePavement engineering
Owner:ENG DETECTION & REINFORCING CO LTD OF HENAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD +1
Splicing method and structure for new and old roads in reconstruction and extension of pavement
ActiveCN105926406AImprove stitching qualityStrong shear resistanceIn situ pavingsPaving detailsCarrying capacityChipseal
The invention relates to a splicing method and structure for new and old roads in reconstruction and extension of a pavement. The splicing parts of new and old roads and loading positions of vehicle wheels are staggerly arranged. The base layers and subbase layers of new and old roads are connected in a step manner, so a contact area of the roadbeds of the new and old roads is increased and frictional force at bonding sites is improved. Construction of pavement layers of the new and old roads is carried out in an inverse step manner, and the splicing parts of the pavement layers can be flexibly adjusted to favorable stress states through adjusting the width of step so as to be kept away from wheelmark zones. The thickness of a water-stop belt depends on the height of a longitudinal joint surface where the belt is located, so the functions of sealing and water stopping of the water-stop belt are realized. Ribbed reinforcement nets are laid at the splicing parts on the top of the subbase layers of cement stabilized macadam of the new road to improve the anti-shearing and anti-bending performance of the parts. The splicing method and structure provided by the invention can improve the splicing quality of new and old roads of a pavement reconstruction and extension project and carrying capacity and endurance of an integral pavement project; and the method and structure are simple, practicable, fast in construction speed, labor-saving, time-saving and good in construction quality and allows the pavement to have good anti-shearing and anti-bending performance.
Owner:NO 1 ENG CO LTD OF FHEC OF CCCC
High polymer asphalt modifier and preparation method and application thereof
ActiveCN102786804AExtended storage timeWon't wasteBuilding insulationsMaterials preparationPolymer science
Owner:SICHUAN XINGONGGU BUILDING MATERIALS TECH
Paver
InactiveCN104179114ASimple and fast operationContinuous constructionRoads maintainenceScreedPavement engineering
The invention provides a paver and relates to the field of pavement engineering machinery. The paver comprises a main frame, a buffer cylinder mounted on the front end of the main frame, a swing beam mounted behind the buffer cylinder at the front end of the main frame, an electric appliance control system, a screed plate on the rear end of a draft arm, main frame connecting columns, a road shoulder distributor and a road shoulder forming machine, wherein the main frame connecting columns are correspondingly arranged on the left and right sides of the main frame and behind the swing beam; the road shoulder distributor is arranged between the swing beam of the main frame and the buffer cylinder mounted on the front end of the main frame; the road shoulder forming machine is mounted on the side surface of the screed plate. The paver is capable of completing paving, leveling and punning in one step during road shoulder filling, is simple and convenient to operate and is capable of carrying out continuous construction, the construction quality is improved and the cost is saved.
Owner:刘全
Dynamic measurement system and dynamic measurement method of stabilized soil stirring equipment
InactiveCN101672685AHigh degree of automationWith volume meteringWeighing apparatus for continuous material flowFrequency changerDrive wheel
The invention belongs to road surface engineering machinery and a control method thereof, in particular to dynamic measurement system and dynamic measurement method of stabilized soil stirring equipment. The measurement system comprises a belt conveyer and a hopper, wherein the belt conveyer is driven by a drive motor, the hopper can discharge materials to a material delivery belt of the belt conveyer, a support roller of the material delivery belt is provided with a weighing sensor which can detect the pressure of the support roller, a rotating shaft of a driven wheel of the belt conveyer isconnected with a counting wheel, a speed measurement sensor which is matched with the counting wheel is arranged beside the counting wheel, the detection signals of the weighing sensor and the speed measurement sensor are input into an industrial control computer, and a control signal of the industrial control computer controls the drive motor of the belt conveyer by a frequency converter. The system has double advantages of volume measurement and weighing measurement, enhances the measurement accuracy and the reliability, lowers the equipment cost, can realize real-time automatic control andhas high degree of automation and convenient operation.
Owner:江苏华通动力重工有限公司(中外合资)
Bituminous mixture cold regeneration mixing method
InactiveCN101392488AImprove uniformityTake advantage of reactive featuresRoads maintainencePavement engineeringRoad engineering
The invention belongs to the production technology of a road engineering material, and relates to a cold-regeneration mixing method of asphalt mixture in the cold-regeneration equipment of asphalt mixture. The method comprises the following steps: the mixing process is carried out in a continuous mode mixing bowl and the addition of the various materials comprises the following steps: (1) adding aggregate at the feed inlet of of the initial end of the continuous type mixing bowl and carrying out spraying process to the aggregate simultaneously, then mixing in the mixing bowl, the amount of the spray water accounts for 20-30% of the total water amount; (2) adding cement and powdered ore into the mixing bowl to be mixed with the previously-added materials; (3) adding water for the second time and the amount of the water accounts for 50-60% of the total water amount; (4) spraying emulsified asphalt and mixing continuously; and (5) adding water for the third time and the amount of the water accounts for 10-20% of the total water amount until the asphalt mixture is obtained. The invention not only improves the uniformity of the mixing of the materials, but also fully utilizes the reaction characteristics between various materials, and guarantees the mixing quality of the final product.
Owner:ZHENJIANG HUACHEN HUATONG ROAD MASCH CO LTD
Shakeproof pipe support frame
ActiveCN108302256AWith shockproof effectPipe supportsPipe elementsTransverse groovePavement engineering
The invention relates to the field of pipe pavement engineering, in particular to a shakeproof pipe support frame; heights and left-right positions of device support pipes can be adjusted; and the device can adapt to pavement of inclined pipes with a certain angle from the ground, and achieves a shakeproof effect. The lower end of an U-shaped frame is fixedly connected with a rotating convex base;trapezoidal transverse grooves are formed in the front end and the back end of the lower end of the U-shaped frame; two spring baffle plates are fixedly connected to the front and back ends of the lower end of the U-shaped frame; pipe vertical baffle plates are fixedly connected to the left and right ends of the upper end of the U-shaped frame, and are provided with upper pressing plate chutes; edge stop rods, long screw slots and isosceles trapezoidal grooves are arranged on upper pressing plates; the edge stop rods are fixedly connected to the left and right ends of the upper pressing plates; the left and right ends of the upper pressing plates are slidingly connected to the two upper pressing plate chutes; and the two edge stop rods are bonded with the outer ends of the pipe vertical baffle plates.
Owner:徐州鹏宇液压科技有限公司
Gravity centre adjustment mechanism for spreader
InactiveCN101392491AEasy to adjustReliable adjustmentRoads maintainenceHydraulic cylinderPavement engineering
The invention belongs to road engineering machinery and relates to a regulating mechanism for the centre of gravity of a spreading machine. The mechanism includes a pair of sliding tracks longitudinally arranged on a chassis of the spreading machine; and a clump weight which can move backward or forward along the sliding track is arranged between the two sliding tracks, and is driven by a hydraulic cylinder. The hydraulic cylinder is driven by a hydraulic driving device which is controlled by a controller, and a detection signal input part of the controller is connected with a plurality of pressure sensors, which are distributed at the different positions of the caterpillar of the spreading machine. The invention changes the center of gravity of the whole spreading machine by driving the clump weight to move by the hydraulic cylinder, the center of gravity of the spreading machine can be adjusted at any moment according to the spreading width and the change of an ironing board, the adjustment process can be controlled by the controller according to the real-time signal of the pressure sensor, therefore, the adjustment is convenient and reliable.
Owner:ZHENJIANG HUACHEN HUATONG ROAD MASCH CO LTD
Preparation method of separated plant-mixed warm-hot regenerated asphalt mixed material
InactiveCN106746926AReduce effective utilizationPromote full accessSolid waste managementPavement engineeringBituminous materials
The invention relates to an asphalt material for pavement engineering and in particular to a preparation method of a separated plant-mixed warm-hot regenerated asphalt mixed material. The preparation method comprises the following steps: (1) detecting the asphalt content of a recovered asphalt pavement material, ageing the asphalt performance and mineral aggregate gradation; (2) determining the content of the recovered asphalt pavement material, a novel aggregate, limestone mineral powder, novel asphalt and a regenerator; (3) adding the mixture into a mixing pot for prestirring; (4) adding the regenerator; (5) discharging the obtained product out of a pot and developing at 40-150 DEG C; (6) adding the heated novel aggregate into the stirring pot, adding the developed product in the step (5) and stirring; and (7) adding the novel asphalt and limestone mineral powder into the product obtained in the step (6) and stirring, and then discharging and forming. The asphalt material provided by the invention is simple in process, good in regenerating effect, high in utilization ratio of the regenerator, relatively low in cost and good in comprehensive pavement performance of the product.
Owner:JIANGSU TIANNUO ROAD MATERIAL TECH
Intelligent heater for ironing plate of asphalt spreader
InactiveCN101046083AMeet heating requirementsHeating up fastRoads maintainenceCombustorPavement engineering
The present invention belongs to the field of road engineering machinery, and is especially one kind of intelligent heater for ironing plate of asphalt spreader. The intelligent heater includes several ironing plates comprising one cover and one bottom plate inside the cover each, burner nozzles controlled with the combustion control system and set over the bottom plates, and one far infrared radiation layer made of far infrared radiating material set between the nozzle and the bottom. The intelligent heater has high temperature raising speed, homogeneous temperature, high heat efficiency and capacity of resulting in high asphalt spreading quality.
Owner:ZHENJIANG HUACHEN HUATONG ROAD MASCH CO LTD
Pipe support frame
The invention relates to the field of pipe pavement engineering, in particular to a pipe support frame. The pipe support frame comprises a frame module, a groove rod module, a transverse frame module,a positioning piece and a pipe frame; the height and the left-right position of a support pipe in the device can be adjusted; the device can adapt to pavement of an inclined pipe forming a certain angle with the ground; and the pipe can be rotated on the device to achieve pavement of the pipe needing to be connected through threads. The frame module comprises side plates, trapezoidal convex bars,cylindrical convexes, rectangular convex bars, a front bottom batten and a back bottom batten; the two side plates are provided; the back bottom batten is fixedly connected between the back ends of the lower ends of the two side plates; the front bottom batten is fixedly connected between the front ends of the lower ends of the two side plates; the rectangular convex bars are arranged on the front and back end surfaces of the two side plates; the side plates are arranged on the upper end surfaces of the two side plates; and the cylindrical convex is fixedly connected to the middle positions of opposite surfaces of the two side plates.
Owner:张家港保税区金运通市政建筑工程有限公司
Method for preparing carbon fiber conductive concrete with melting snow and ice function
The invention provides a method for preparing carbon fiber conductive concrete with melting snow and ice function, and belongs to the technical field of concrete. The method for preparing carbon fiber conductive concrete can be widely used for concrete pavement engineering construction of bridge decks and airport runways. The raw materials include cement, short carbon fibers, an admixture, sand, stone, and water, wherein water cement ratio is of 0.55-0.58, the mass of cement, sand and stone respectively account for 18%-25%, 20%-45%, and 20%-45% of total mass of the concrete, and the carbon fibers have a length of 7-13 mm and account for 0.6%-2.0% of the whole volume of the concrete. In the preparation process, the mixed water and admixture are poured into cement mortar, and then the short carbon fibers are added, and finally the stones are added to prepare the carbon fiber conductive concrete. The carbon fibers can be uniformly dispersed in the concrete, and the prepared carbon fiber conductive concrete can make use of the electrothermal effect to melt snow and ice.
Owner:CHINA AIRPORT CONSTR GRP +1
High-speed rail unballasted double-track pavement multifunctional intelligent vehicle
InactiveCN106351094AOvercome deficienciesRailway track constructionPavement engineeringUltimate tensile strength
The invention provides a high-speed rail unballasted double-track pavement multifunctional intelligent vehicle, and relates to the technical field of high-speed rail underground railway track pavement gauge positioning, spike screwing and stepping automation. A system comprises four elastic strip buckle automatic push-in-place device, an intelligent vehicle automatic stepping device, a standard gauge positioning, rectifying and locking device, an intelligent vehicle up and down rail device, a measuring, analyzing, recording and networking device and an intelligent vehicle central processing and decision making module. Spot testing is conducted on tightening torque of current high-speed rail system rail buckle elastic strip spike nut, data is not recorded in, artificial cutting is conducted by various work types, detaching and assembling are repeated multiple times, bolts, nuts and threads are damaged, and driving safety is influenced; due to artificial cutting, the construction period is prolonged, the construction site is disordered, and the multifunctional intelligent vehicle is created. The technical problem that in pavement, the multiple procedures of screwing, detaching and gauge detecting are combined is solved, the rail pavement engineering quality is ensured, production efficiency is improved, the engineering construction period is shortened, and the labor intensity of operators is relieved.
Owner:胡德令
Self-feedback floating scraping system of pavement milling machine
InactiveCN103215883AAppropriate ground pressureGood construction performanceRoads maintainenceTerrainControl system
The invention belongs to the field of pavement engineering machinery, and relates to a self-feedback floating scraping system of a pavement milling machine. The self-feedback floating scraping system comprises a scraping plate and a control system, wherein the scraping plate is arranged on the lower part of a turning body of the pavement milling machine and can lift by being driven by a scraping plate oil cylinder; the control system is used for controlling the lifting of the scraping plate, and comprises a pressure sensor which is arranged on the scraping plate and can detect ground pressure of the scraping plate; the detection signal output end of the pressure sensor is connected to a CPU (Central Processing Unit) capable of processing detection data; and the control instruction output end of the CPU is connected to a scraping plate valve group capable of controlling the action of the scraping plate oil cylinder. The self-feedback floating scraping system disclosed by the invention can keep the appropriate ground pressure all the time for milling in a pulling and scraping operation process by detecting and regulating the ground pressure of the scraping plate in real time, thereby being suitable for the change of pavements with different terrains and improving the construction effect and efficiency.
Owner:ZHENJIANG HUACHEN HUATONG ROAD MASCH CO LTD
Semi-rigid asphalt pavement material and preparation method thereof
ActiveCN106186922AReduce high temperature viscosityIncrease high temperature viscosityCeramicwareCrack resistancePavement engineering
The invention relates to a pavement engineering material, and concretely relates to a semi-rigid asphalt pavement material and a preparation method thereof. The semi-rigid asphalt pavement material comprises, by volume, 75-85% of a macro-porous asphalt mixture and 15-25% of a grouting material; the macro-porous asphalt mixture is obtained through mixing mineral, a filler and rubber high-viscosity modified asphalt; and the grouting material is obtained through mixing fine particle modified emulsified asphalt, PC42.5 composite Portland cement, an active admixture, sands, water, a water reducer, an aluminum powder, an expanding agent, an air entraining agent, an antifoaming agent and limestone mineral powder. The semi-rigid asphalt pavement material has the advantages of good construction workability, strong high-temperature rut resistance and low-temperature cracking resistance, good durability, long fatigue life, good combination property of the macro-porous asphalt mixture with the grouting material, small temperature shrinkage and dry shrinkage cracks, energy saving, environmental protection, and realization of the high cost performance of recycling of solid wastes.
Owner:JIANGSU TIANNUO ROAD MATERIAL TECH
High-strength pavement functional material for laying stress absorption band
ActiveCN104629387AWide variety of sourcesLong-term stable performanceIn situ pavingsBuilding insulationsFiberPavement engineering
The invention belongs to the technical field of pavement material engineering, and particularly discloses a high-strength pavement functional material for laying a stress absorption band. The material is prepared from the following raw materials in parts by weight: 100 parts of asphalt, 6-12 parts of thermoplastic styrene-butadiene rubber (SBS), 0.5-1.5 parts of polyphenylether, 20-30 parts of epoxidized natural rubber and 3-5 parts of fiber. The high-strength pavement functional material has the advantages of high tensile strength, favorable bonding power with the pavement structural layer, temperature change resistance, simple construction process and the like, has favorable effects for treating old cement concrete pavement cracks and asphalt pavement cracks and preventing crack reflection when being used in cement concrete pavement modification combined pavement engineering and asphalt pavement laying engineering, and has important meanings for enhancing the service life and roadability of the combined pavement.
Owner:SHANXI PROVINCIAL RES INST OF COMM +1
Cast-in-situ colored permeable ecological concrete and road surface construction process thereof
The invention relates to concrete, in particular to cast-in-situ colored permeable ecological concrete and a road surface construction process thereof. Each cubic meter of concrete is prepared from the following raw materials by weight: 200 to 350 kilograms of cement, 80 to 150 kilograms of water, 1,200 to 1,550 kilograms of coarse aggregates, 180 to 280 kilograms of fine aggregates, 4.5 to 5.5 liters of ZS series concrete admixture and 10 to 18 kilograms of pigment. The ecological concrete can be mixed by utilizing a mixing plant; and after being conveyed to a construction site by a commercial concrete mixer and added with the admixture, the ecological concrete can be subjected to the pouring constructing of road surfaces directly without vibrating and are only needed to be plastered by a metal trowel, so the construction efficiency is improved greatly. The ecological concrete is used for road surface engineering, uses a small amount of the cement, has high strength and water permeability, and can be widely applied to light traffic road surfaces such as side pavements, parks, neighborhoods and the like.
Owner:SHENZHEN WEIHAI BUILDING MATERIAL
System for identifying and automatically drafting asphalt road surface diseases and method of system
ActiveCN106087679AIntuitive supplementVisual verificationRoads maintainenceDiseaseHorizontal distribution
The invention discloses a system for identifying and automatically drafting asphalt road surface diseases and a method of the system. The method comprises the following steps of collecting initial data of the technical condition of an asphalt road surface by a road comprehensive monitoring vehicle; converting the initial data of the technical condition of the road surface into a normalized engineering object by a road surface engineering converting module; performing manual identification on the road surface diseases by a road surface disease identifying module; automatically generating a road surface disease detail list by a report generation module; and extracting information from the road surface disease detail list by an automatic generation module of road surface disease horizontal distribution CAD drawing sheets, and automatically drafting and generating a road surface disease horizontal distribution CAD drawing sheet. The method disclosed by the invention is free from a conventional method of performing manual investigation and manual recording on the road surface diseases, and then manually drafting the CAD drawing sheet according to the recorded information, so that the efficiency and the accuracy of identifying the asphalt road surface diseases and displaying the distribution of the asphalt road surface diseases are greatly improved, and the generated road surface disease horizontal distribution CAD drawing sheet can be directly used for guiding the maintaining design and the construction of asphalt road surfaces, and the engineering application prospect is wide.
Owner:ZHEJIANG COMM GRP DETECTION TECH CO LTD
Pavement petroleum asphalt high temperature and low temperature using performance rapid detection method
ActiveCN106950118ARapid determinationReduce interactionMaterial strength using tensile/compressive forcesVitrificationDynamic shear rheometer
The invention discloses a pavement petroleum asphalt high temperature and low temperature using performance rapid detection method, and belongs to the field of pavement engineering. According to the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method, a dynamic shear rheometer is adopted, organic combination of time scanning and frequency scanning is realized, and asphalt high temperature performance and low temperature performance are obtained via one time of scanning experiment. The pavement petroleum asphalt high temperature and low temperature using performance rapid detection method comprises following steps: 1, dynamic shear time scanning and frequency scanning of pavement petroleum asphalt are carried out using the dynamic shear rheometer so as to obtain different asphalt frequency scanning curves in a certain temperature range; 2, a temperature-rut factor change curve is drawn for regression analysis, and asphalt high temperature evaluation is carried out; and 4, parallel displacement of different temperature scanning curves is carried out based on time-temperature equivalence principle so as to obtain displacement factors, fitting is carried out based on WLF equation derived formula, pavement petroleum asphalt glass-transition temperature is obtained via back calculation, and low temperature pavement using performance rapid determination is carried out. Compared with the prior art, the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method possesses following advantages: the pavement petroleum asphalt high temperature and low temperature using performance rapid detection method is rapid, and is high in efficiency, credibility, and applicability.
Owner:SHANDONG TRANSPORTATION INST
Regeneration activator for old asphalt mixture of high type asphalt pavement
ActiveCN103360772AHigh flash pointSuitable for thermal recyclingBuilding insulationsChemical compositionPavement engineering
The invention discloses a recycling utilization technology of an old asphalt mixture of a high type asphalt pavement. According to the invention, for the chemical composition change condition of the old asphalt mixture in the asphalt pavement, saturates, aromatics, colloids and asphaltenes in the asphalt are analyzed by a component method; the missing part in the old asphalt is adjusted by adding an activator according to the change of each component of the aged asphalt; the component transfer problem (commonly known as aging) of the old asphalt material in the asphalt pavement is solved from the aspect of recovering the chemical components of the old asphalt; as a result, the chemical components of the old asphalt material are re-activated, the old asphalt mixture is caused to obtain new technological performance, the original mechanical properties and pavement performance indicators of the old asphalt mixture are recovered, and the old asphalt mixture can be better utilized by pavement engineering again.
Owner:石城祥
Mix material of zoology concrete in use for bearing structure and preparation method
InactiveCN1562858AHigh strengthEasy constructionSolid waste managementPavement engineeringRoad surface
The invention is ecological concrete mixture used for bearing structure of civil engineering and prodn. method. It is produced by stirring main raw material regenerated crude aggregate created by grinding discarded concrete, cement, flyash and water.
Owner:TONGJI UNIV
Asphalt foaming agent and preparation method thereof
InactiveCN106496677AHigh expansion rateExtended half-lifeClimate change adaptationBuilding insulationsFoaming agentPavement engineering
The invention relates to manufacturing of a foaming agent applied to foamed asphalt production for pavement engineering, as well as asphalt mixed material warm-mixing construction, asphalt pavement cold-regeneration and modified asphalt technologies, in particular to an asphalt foaming agent for foamed asphalt and modified asphalt, and a preparation method of the asphalt foaming agent. The components of the asphalt foaming agent are natural latex and industrial latex, wherein the mass ratio of the natural latex to the industrial latex is 100:0 to 0:100; and the solid content mass percent is 1 to 80 percent, preferably 30 to 80 percent. The foaming agent provided by the invention not only can increase the expansion rate and the half-life period of asphalt foaming and improve the stability of the foamed asphalt, but also can obviously improve the high and low temperature properties of the asphalt and improve the character of the asphalt.
Owner:JIANGSU TIANNUO ROAD MATERIAL TECH
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