621 results about "Asphalt concrete" patented technology

The invention discloses a road carbon emission evaluation method and system, and relates to the technical field of carbon emission evaluation, and the method comprises the following steps: S1, collecting the traffic flow data and environment data of a target road section in real time through a roadside sensing array; s2, constructing a road body carbon emission calculation model; s3, establishing a maintenance activity carbon emission compensation model; s4, constructing a driving behavior carbon emission correction model; s5, establishing a climate accumulation effect correlation model; and S6, generating a dynamic emission coefficient matrix, and establishing a carbon emission coefficient dynamic correction mechanism of different generations of vehicles. According to the method, the road body carbon emission calculation model is constructed, the unit mileage road maintenance carbon emission factor is dynamically generated, oxygenolysis carbon emission of the asphalt concrete material is considered, the influence of the road surface flatness on the vehicle rolling resistance is also taken into account, and therefore comprehensive and accurate accounting of the road carbon emission is achieved, and the calculation efficiency is improved. And the accuracy of the evaluation result is obviously improved.

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 utility model relates to the technical field of bridge expansion and reconstruction, and discloses a bridge widening corrugated plate splicing structure which comprises a corrugated plate, the corrugated plate connects an old bridge with a steel-concrete composite beam through a connecting piece, the corrugated plate is located between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with asphalt concrete, and the lower portion of the corrugated plate is filled with concrete. The top face of the asphalt concrete is flush with the top face of the old bridge and the top face of the steel-concrete composite beam. The corrugated plate is spliced between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with the asphalt concrete so that the plane of the corrugated plate can be flush with the old bridge and the steel-concrete composite beam, the asphalt concrete and the corrugated plate bear additional internal force generated by the settlement difference of the new bridge and the old bridge together, and the crack resistance of the connecting structure at the splicing position can be effectively improved.

The utility model discloses a steel bridge deck pavement structure, which belongs to the technical field of road pavement, and comprises a steel plate, an anti-corrosion layer, a waterproof bonding layer, a pavement lower layer, an interlayer bonding layer and a pavement upper layer which are sequentially paved from bottom to top, the anti-corrosion layer is epoxy zinc-rich primer, the waterproof bonding layer is epoxy resin adhesive, and the interlayer bonding layer is epoxy resin adhesive. The pavement lower layer is made of epoxy asphalt concrete, the interlayer bonding layer comprises an epoxy asphalt adhesive, a glass fiber grating and broken stone, the pavement upper layer is made of modified asphalt concrete SMA, and the problems of high-temperature pushing, surface layer cracking and the like can be effectively solved.

The utility model relates to the technical field of expansion joints, in particular to a deformed steel-elastic body combined seamless expansion joint structure and a bridge, the expansion joint structure increases the coupling action area and the coupling force of an elastic body and deformed steel through the combined structural design of a deformed plate, the deformed steel, the elastic body and a covering layer, so that the expansion joint structure is more flexible and reliable. The phenomenon that weak connecting surfaces are easy to debond too early is improved, the service life of the structure is prolonged, and the durability of the structure is improved; the deformation direction of the elastic body is controllable, the road surface is prevented from bulging, and the driving safety problems such as bumping are completely eradicated; the covering layer in the expansion joint area can cooperate with the elastic material for tension and compression deformation, meanwhile, it is guaranteed that the rigidity transition from the asphalt concrete layer in the non-expansion area to the covering layer is smooth, and the vicious circle that the bumping phenomenon is caused by the unsmooth road surface, and the local damage of the road surface is more serious due to the impact load under the bumping phenomenon is prevented.

The invention relates to the technical field of anti-seepage protective materials, in particular to a high-toughness high-molecular flexible auxiliary anti-seepage protective material and a preparation method thereof, and the high-toughness high-molecular flexible auxiliary anti-seepage protective material comprises a component A and a component B, the component A at least comprises the following preparation raw materials: first polyol, a chain extender, diisocyanate and an anti-aging agent, the mass ratio of the diisocyanate in the component A is 22-35%, and the mass ratio of the anti-aging agent in the component A is 0.1-1%; the first polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol, and the second polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol; the chain extender is prepared from dipropylene glycol and methyl propylene glycol; the component B is prepared from the following raw materials: second polyol, a plasticizer, a filler and an amine catalyst, and is subsequently coated on the surfaces of base materials such as asphalt concrete and concrete to isolate a bottom structure from the external environment, so that the effects of isolation, seepage prevention, protection, insulation, flame retardance and the like are achieved.

The invention discloses a method for determining the crest elevation of a rolling type earth and rockfill dam in water conservancy and hydropower engineering. Comprising the following steps: collecting meteorological data, determining a calculated wind speed, determining a water area plane, determining an equivalent wind area length, determining a water area average depth, determining an average wave height and an average wave period, determining an average wavelength, determining a designed wave climb height, determining a wind congestion water surface height, determining a safe height, determining a dam body total superelevation, and determining a wave wall height. And determining the dam crest elevation. The method is suitable for earth and rockfill dams such as clay core-wall rockfill dams, asphalt concrete core-wall rockfill dams, asphalt concrete face rockfill dams, concrete face rockfill dams and homogeneous dams. The method not only has scientificity, accuracy, comprehensiveness, systematicness, safety and economical efficiency, but also is easy to popularize and apply, and has important significance for improving the accuracy and safety of dam design.

The invention relates to the technical field of material detection, and discloses an asphalt concrete fluidity detection device which comprises a base, an extension rod is arranged on the outer surface of the driving end of a lifting mechanism, a detection rod fixedly penetrates through the end, away from the lifting mechanism, of the extension rod, and a detection head is fixedly connected to the bottom end of the detection rod. A cleaning assembly is arranged on the side edge of the lifting mechanism, a rotating assembly is arranged between the lifting mechanism and the cleaning assembly, the cleaning assembly comprises an inner ring arranged on the outer surface of the detection rod in a sleeving mode, and an elastic rubber ring is arranged in the inner ring. According to the asphalt concrete fluidity detection device, automatic cleaning of the detection head is achieved by means of an elastic rubber ring outside the detection rod and a reciprocating rotation structure, when the detection head moves upwards, the rubber ring with the larger size is elastically attached to the surface of the detection head to slide, meanwhile, the vertical plate track drives the gear rack to make the rubber ring rotate in a reciprocating mode, and unsolidified asphalt is scraped; and the cleaning effect is enhanced through rotation, attached materials are shaken off, manual cleaning is reduced, and the detection continuity and convenience are improved.

The invention relates to the technical field of asphalt concrete production, in particular to an asphalt mixing plant monitoring system and method. The method comprises the following steps: acquiring real-time production operation data of the asphalt mixing plant, and constructing a real-time production state vector; acquiring production process data of all superior product batches in history as a training data set; performing clustering processing on the training data set to obtain a qualified mode set; when the real-time production state vector does not belong to any qualified production mode cluster, calculating a mode deviation degree, and further calculating a comprehensive risk level; performing grading early warning based on a size relationship between the comprehensive risk grade and a preset risk threshold value, and monitoring the asphalt mixing plant; and the monitoring accuracy of the asphalt stirring process is improved.

The invention relates to the technical field of asphalt concrete quality monitoring, and discloses asphalt concrete quality monitoring equipment which comprises a bottom plate, and a melting component is arranged at the top of the bottom plate; the melting part comprises a monitoring plate, the bottom of the monitoring plate is fixedly connected with the top of the bottom plate, an adaptive groove is formed in the top of the monitoring plate, a supporting rod is fixedly connected to the top of the monitoring plate, a working table is fixedly connected to the top of the supporting rod, and a monitoring frame is fixedly connected to the inner wall of the working table. Heat generated by the heating device can enter the air outlet frame, a fan is started to start operation, heat generated by the fan enters the air outlet frame and enters the monitoring frame through the air outlet frame, and asphalt concrete entering the monitoring frame is heated through the heating device; the asphalt concrete can be molten in the monitoring frame, and the molten asphalt concrete can be attached to the inner wall of the monitoring frame, so that the adhesion of the asphalt concrete can be monitored through the adhesion monitoring component.

The invention relates to the technical field of asphalt concrete production, in particular to a bag-type dust remover for stone dust recycling, which comprises a dust removal bin, a pattern plate is fixedly mounted on the upper side in the dust removal bin, a plurality of mounting holes are formed in the pattern plate, dust removal bags and a bag cage are mounted in the mounting holes, and an air outlet cylinder is rotatably mounted in the bag cage. A plurality of expansion units which are uniformly arranged up and down are mounted on the outer side of the air outlet cylinder, expansion rings are mounted on the expansion units, and the expansion rings are fixedly connected with the cloth bag cage; through radial expansion and retraction of the expansion ring, a hardened layer on the surface of the filter bag can be effectively broken, meanwhile, the subsequent pulse back-blowing dust removal effect is improved, and the dust recovery efficiency is ensured; when the dust collection bag is locally damaged, the dust collection bag can prevent dust-containing air flow from flowing out through the air outlet cylinder, so that the dust collection bag can still maintain a normal filtering function in other areas except the damaged position, thereby reducing environmental pollution and ensuring the dust collection efficiency.

The invention discloses a dust recovery device for asphalt concrete production, and particularly relates to the technical field of dust recovery in asphalt concrete production, the dust recovery device comprises a supporting frame, a one-way mechanism is mounted on the other side of a recovery box, airflow plates are mounted on the front side and the rear side of the recovery box, and an air blower is fixedly mounted at the bottom of the recovery box; a flow guide plate with the arc-shaped bottom is installed in an inner cavity of the recycling box, conveying assemblies are installed on the front side and the rear side of the inner cavity of the recycling box, filter cartridges are arranged on the two sides of the flow guide plate, and a knocking mechanism is arranged on the upper portion of the flow guide plate. According to the dust recovery device for asphalt concrete production, the knocking mechanism drives the internal structure of the one-way mechanism to move while knocking the filter cartridge, and then drives the internal structure of the collecting assembly to rotate in the movement process of the one-way mechanism, so that the dust is recovered; and therefore, dust impurities entering the conveying assembly are conveyed into the storage tank to be collected, and subsequent resource recycling is facilitated.

The invention relates to the field of overlay materials, in particular to a two-component overlay material suitable for a modified asphalt concrete pavement and a preparation method of the two-component overlay material. The two-component overlay material suitable for the modified asphalt concrete pavement comprises the following raw materials: a component A: a polymer emulsion, a composite additive, a silane coupling agent, a film-forming agent, an ultraviolet absorbent, a stabilizer and the like; the component B is a polyisocyanate curing agent. The finally prepared two-component overlay material can simultaneously give consideration to comprehensive properties such as adhesion, hydrolysis resistance, weather resistance and saline-alkaline resistance, the phenomenon that other properties are greatly sacrificed for a certain prominent property is avoided, and the overlay material can be ensured to be popularized and applied in various environments and harsh working conditions; the technical level of modified asphalt concrete pavement maintenance is greatly improved, and the application effect is excellent.

To provide a greening method for poured concrete roofs and rooftops, or asphalt and concrete and the like.SOLUTION: Provided is a greening method, in which a construction area is surrounded by a partition frame, and a root-potted plant is placed in a center of the contact point between laid TK planting mats, a hook-shaped anchor pin is inserted into the contact point between the TK planting mats, a welded wire mesh locking member is used to hold and secure them in place, a looped wire passed through a PVC tube is fastened to an anchor claw on the head of the anchor pin to connect the anchor pins together, a nut on the head of the anchor pin is re-tightened to tighten the looped wire, and the tree is planted and secured to prevent it from falling over.SELECTED DRAWING: Figure 1

The invention provides an asphalt concrete paver, and relates to the technical field of pavers. The paver comprises a vehicle body, a first driving mechanism, a paving mechanism, a first connecting mechanism and a discharging mechanism, the vehicle body comprises a hopper. The first driving mechanism comprises a supporting frame and a driving lead screw which is arranged in the supporting frame in a penetrating mode and driven by a first motor to rotate. The paving mechanism comprises an ironing plate connected with the driving screw rod; the first connecting mechanism comprises a connecting plate connected to a rod body of the driving screw rod, and the other end of the connecting plate is connected with the ironing plate; the discharging mechanism is arranged at the bottom of the car hopper and comprises a first rotating shaft and a plurality of blades, the first rotating shaft penetrates through the discharging channel in the direction perpendicular to the bottom of the car hopper, the blades surround the first rotating shaft and are located in the discharging channel, and one end of the first rotating shaft is connected with the driving lead screw through a linkage structure; and the driving screw rod is used for driving the ironing plate to move and driving the first rotating shaft to rotate through self rotation, so that the paving uniformity and the discharging speed uniformity can be synchronously improved.

The invention belongs to the technical field of crushing equipment, and particularly provides a concrete crushing and screening device and a recycled asphalt concrete production process. The concrete crushing and screening device comprises a multi-stage vibrating screen, a first-stage crusher and a second-stage crusher, and the multi-stage vibrating screen can screen concrete materials into at least three types according to the particle size in advance. In the working process, powder materials which do not need to be crushed repeatedly are directly discharged through the corresponding discharging ports and do not enter the first-stage crusher and the second-stage crusher any more, energy consumption is reduced, and excessive crushing is avoided. Coarse aggregate with large particle size firstly enters the primary crusher through the corresponding discharge port, and then enters the secondary crusher through the discharge channel for secondary crushing. The graded crushing design ensures that the coarse aggregate is fully crushed, the mixing of substandard aggregate or powder materials in a final product is reduced, and the grading uniformity of the recycled aggregate and the quality stability of the product are improved.

The application provides an anti-water freezing type gelling stable phosphogypsum asphalt concrete and a preparation method thereof, and comprises the following steps: 1, obtaining phosphogypsum powder by treating recycled waste phosphogypsum; 2, preparing PU / cement composite modified asphalt; 3, quantitatively taking PU / cement composite modified asphalt, natural aggregate and the phosphogypsum powder obtained in the step 1) (instead of mineral powder); 4, according to the designed mixing ratio, mixing the PU / cement composite modified asphalt, aggregate and phosphogypsum filler to prepare the anti-water / anti-freezing type phosphogypsum asphalt concrete. The composite modification of PU and cement can enhance the adhesion of asphalt to the natural aggregate and the phosphogypsum, significantly improve the water resistance and freezing resistance of the anti-water / anti-freezing type phosphogypsum asphalt concrete, greatly solve the problem that the potential practical engineering application of the phosphogypsum filler is limited due to the poor water stability, relieve the environmental pollution problem, and the production process is simple and easy to operate.

The utility model relates to the technical field of road construction equipment, in particular to a spiral paver for asphalt concrete, which comprises a rack, a spiral paving component, a paving controller and an ironing plate, and the paving controller and the ironing plate are arranged on the rack; the spiral spreading assembly comprises at least two spiral spreading devices which are connected in sequence, each spiral spreading device is connected with the rack through a lifting suspension support, and the spiral spreading devices and the lifting suspension supports are connected with the spreading controller. According to the utility model, the spiral pavers are arranged in sections, and the height of each section of spiral paver is adjusted, so that the uniform paving of the asphalt mixture is controlled, and the problem of segregation of asphalt concrete is solved.

The invention discloses a processing technology of high-durability colored asphalt concrete, belongs to the technical field of asphalt concrete, and aims to solve the technical problem that the color stability, rut resistance, water damage resistance and other properties of colored asphalt concrete in the prior art need to be further improved. The preparation method comprises the following steps: adding emulsified colored asphalt and a curing agent into a stirrer, stirring and mixing, adding coarse aggregate, fine aggregate and an auxiliary additive into the stirrer, raising the temperature of the stirrer to 90-100 DEG C, and stirring and mixing for 40-50 minutes to obtain the colored asphalt concrete. The emulsified colored asphalt is mixed with the filler, so that the stability of the colored asphalt concrete is effectively improved, and the color durability and stability of the colored asphalt concrete are also improved.

The invention discloses an asphalt concrete permeability detection device, and relates to the technical field of concrete detection equipment. The device comprises a measuring cylinder, and a pressurizing assembly is arranged in the measuring cylinder. A threaded rod is driven to rotate by rotating a first rotary knob, so that an adjusting block moves vertically and downwards, a fixing plate and a sealing gasket are driven to move vertically and downwards through a limiting rod and a connecting rod, when the sealing gasket moves to the position below a liquid inlet pipe, the interior of the measuring cylinder is in a closed state, and the sealing gasket continues to move downwards; the pressure in the measuring cylinder is gradually increased, the pressure at the moment is judged through the pressure gauge, when the pressure reaches the standard atmospheric pressure, follow-up detection can be carried out, by arranging the assembly, the problem that the detection result is influenced by the low-pressure environment when the road surface in the high-altitude area is detected is effectively solved, the effect of reducing errors can be achieved, and meanwhile the detection accuracy is improved. The accuracy of a detection result is improved, and evaporation of detection liquid in a low-pressure environment is avoided.

The invention discloses high-weather-resistance and high-durability asphalt concrete and a preparation method thereof. On one hand, the invention provides the asphalt concrete with high weather resistance and high durability, and the asphalt concrete is prepared from the following components in parts by weight: 38 to 44 parts of coarse aggregate, 18 to 24 parts of fine aggregate, 8 to 12 parts of superfine filler, 6 to 10 parts of SBS (Styrene Butadiene Styrene) modified asphalt and 6 to 8 parts of asphalt modifier; the asphalt modifier is prepared from the following components in parts by weight: 20 to 24 parts of carboxymethyl chitosan microcapsules coated with an aromatic hydrocarbon oil repairing agent, 6 to 10 parts of waste rubber powder, 10 to 12 parts of epoxy resin, 4 to 8 parts of nano silicon dioxide and 8 to 12 parts of basalt short fibers. On the other hand, the invention further provides a preparation method of the high-weather-resistance and high-durability asphalt concrete. According to the present invention, the cost is relatively low, the low-temperature crack resistance and the high-temperature rutting resistance can be effectively improved, and the anti-aging performance and the durability are strong.

The invention discloses an anti-cracking phosphoric acid-based geopolymer, an anti-cracking recycled aggregate as well as a preparation method and application of the anti-cracking phosphoric acid-based geopolymer and the anti-cracking recycled aggregate. The method comprises the following steps: by taking a phosphoric acid solution with the mass concentration of 50-60% as a phosphoric acid excitation solution, firstly, adding metakaolin into the phosphoric acid excitation solution, and mixing, so that the aluminum-silicon structure of the metakaolin is fully deconstructed by phosphoric acid; the preparation method comprises the following steps: adding the phosphoric acid into a reaction system, adding fly ash, mixing to enable the phosphorus-aluminum ratio in the reaction system to be 1.2-1.4, magnetically stirring at 70-80 DEG C until the slurry is changed from red brown to gray, and generating an inorganic polymer network mainly comprising P-O-Al and P-O-Si bonds, namely the anti-cracking phosphoric acid-based geopolymer slurry. The modified recycled aggregate prepared by adopting the phosphoric acid-based geopolymer slurry in combination with three-stage maintenance not only has improved cracking resistance, but also has better mechanical properties. The performance of the prepared modified recycled aggregate is close to that of natural aggregate, and the modified recycled aggregate can be applied to asphalt concrete or asphalt pavements.

The invention discloses asphalt concrete recycled material recycling equipment, which belongs to the technical field of asphalt concrete milling material processing and comprises feeding equipment, heating equipment and metering and stirring equipment. The heating equipment comprises a recycled material regeneration heating roller, a combustor and a low-temperature hearth, the feeding equipment is located at the input end of the recycled material regeneration heating roller, and the output end of the recycled material regeneration heating roller is communicated with the combustor through the low-temperature hearth. The feeding direction of the reclaimed material is opposite to the flame direction of the combustor, and the combustor and the reclaimed material regeneration heating roller are transited through the low-temperature hearth, so that direct contact between the reclaimed material and high-temperature flame is avoided. Low-temperature airflow is conveyed to the inner barrel through the backflow cavity, so that the outlet temperature of the low-temperature hearth is kept in a low-temperature state of about 600 DEG C. The recycled material is gradually heated in the recycled material regeneration heating roller, so that the recycled material and asphalt are prevented from being overheated and aged, the heating efficiency is higher, and the heat utilization is more sufficient.

The utility model provides gravel drying equipment with a dust removal function for asphalt concrete production, and relates to the technical field of concrete production, the gravel drying equipment comprises a drying cylinder, a feed port and a discharge pipe, the feed port and the discharge pipe are positioned on two sides of the drying cylinder, a heat supply cylinder is arranged on one side of the feed port, and a dust collection box is arranged on one side of the drying cylinder; a second dust suction hood and a first dust suction hood are respectively arranged at the tops of the feeding hole and the discharging pipe; a dust suction pump is arranged at the top of the dust collection box; suction force is generated in the second dust suction cover and the first dust suction cover by starting the dust suction pump, so that dust generated at the inlet and outlet position of the drying cylinder is sucked and input to one side of the guide hopper in the inner cavity of the dust collection box, the dust generated in the drying process is prevented from being diffused through the positions of the feeding port and the discharging port, and the dust removal quality is improved; and dust in the gas is collected through a dust collection bag in the input dust collection box, so that centralized treatment of the dust is facilitated, and the use effect is improved.

The present invention discloses a method for preventing cracking of cement concrete pavement by adding asphalt concrete, comprising the following steps: construction of pavement base layer; adding measures to prevent uneven settlement of the base layer; construction of cement concrete pavement; cutting of cement concrete pavement; grouting of cement concrete pavement; construction of curbstones; paving of reinforced asphalt concrete pavement; cutting of asphalt concrete pavement; grouting of asphalt concrete pavement. Compared with the prior art, the method of the present invention is not only highly operable, convenient and reliable, but also effectively reduces cracking of the pavement due to various reasons. The permanent and temporary combined roads at the construction site save a series of costs such as demolition and reconstruction, and the maintenance cost of the pavement in the later stage is also greatly reduced. Since the existing pavement is used as the base layer of the new pavement, the construction period is shortened. Compared with cement concrete pavement, the dust suppression and noise reduction functions of asphalt pavement are significantly improved, which has a better effect on protecting the surrounding environment.

The application provides a semi-excavation and semi-filling full-reservoir-pot anti-seepage drainage type, which comprises asphalt concrete panels arranged along the periphery of the reservoir pot and a geomembrane laid on the reservoir bottom, the asphalt concrete panel on one side of the reservoir bank is overlapped with the geomembrane through the arrangement of a reservoir bank concrete gallery, the asphalt concrete panel on the panel rockfill dam is overlapped with the geomembrane through the arrangement of a concrete connecting plate, the connection and fixation of the asphalt concrete panel and the geomembrane are realized through the arrangement of the concrete connecting plate and the reservoir bank concrete gallery, the problems that the concrete panel of a high dam is easily squeezed and damaged and the asphalt concrete panel on the high-filling slag body of the reservoir bottom is difficult to adapt to uneven deformation are solved, a new anti-seepage solution is provided for projects with complex topographic and geological conditions, high dam, deep filling of the reservoir bottom and poor filling materials, a partition monitoring system is formed through the arrangement of the reservoir bank concrete gallery, the reservoir bottom concrete gallery and the front pool concrete gallery, the defect position of the reservoir pot seepage can be quickly and effectively identified, and the operation safety of the project is ensured.

The application relates to high-quality steel slag aggregate and a preparation method and application thereof, the method is a grading carbonization process, which comprises the following steps: (1) primary carbonization and reduction: taking molten steel slag in a state of 1300 DEG C-1500 DEG C as raw material, continuously introducing industrial waste gas into a hot steaming tank for carbonization in a water spraying cooling process for 8h-14h, meanwhile, making the diiron trioxide in the steel slag be reduced into iron single element and magnetite, and obtaining primary carbonized steel slag; the volume ratio of CO2 in the industrial waste gas is 20%-30%, and the volume ratio of CO is 30%-60%; (2) secondary carbonization: selecting the primary carbonized steel slag below 10mm in step (1) as aggregate, spraying the steel slag aggregate according to a preset spraying amount in a closed container, maintaining the pressure in the closed container as 0.3-0.5 Mpa, continuously introducing the same industrial waste gas into the closed container for secondary carbonization, and making the free calcium oxide content in the steel slag aggregate be lower than 3%; and magnetically selecting the high-quality steel slag aggregate after secondary carbonization. According to the method, the high-quality steel slag aggregate meeting the relevant technical requirements can be prepared within 24h, and is used for preparing asphalt concrete.

The present invention provides an automated protective device and method for asphalt core wall rolling construction, comprising a plurality of scaffolds arranged in sequence, each scaffold being provided with a walking device at the bottom for walking along the transition material on both sides of the asphalt core wall; a horizontally arranged covering film shaft is provided on the scaffold located at one end, the covering film shaft being connected to a driving device for realizing automatic winding, the covering film being wound on the covering film shaft, and the covering film actively covering the surface of the asphalt core wall; a scaffold located in the middle being provided with a bottom film pressing roller for pressing the covering film onto the surface of the asphalt core wall; during the construction process, the scaffold moves with the roller and the device. By providing a structure of multiple scaffolds, covering films, and windproof films, the surface of the asphalt concrete can be automatically covered after paving, thereby avoiding excessive temperature loss on the surface of the asphalt concrete. It can also reduce the impact of sand and dust on asphalt concrete paving, significantly reduce the steps of subsequent manual processing, improve safety, and reduce labor intensity.

The invention relates to the technical field of road engineering, in particular to a reinforced concrete stiffening dense rib pile supporting post-tensioning method prestressed road and a construction method. According to the overall technical scheme, dense rib pile multilateral wing beam pile head integrated design is adopted, pile sinking is conducted through a steel casing guide soil squeezing static pressure method, longitudinal and transverse crossed flat and hidden beams cooperatively bear, butt joint steel bars are connected through a full grouting sleeve grouting method, post-tensioning method unbonded prestressed tendon perforation laying is conducted, and double-I-beam pedestal bearing prestress applying and anchoring are conducted; according to the principle of reinforcing the bearing effect of road structure group piles through reinforcing meshes, the rapid mounting and dismounting process of aluminum molds and comprehensive pavement of asphalt concrete surface layers, the bearing capacity of the road structure is improved, the stability and durability are enhanced, meanwhile, the construction efficiency is optimized, and the follow-up maintenance cost is reduced.

The utility model relates to the technical field of asphalt concrete, and discloses a stirring device for asphalt concrete processing, which comprises a stirring tank, the top of the stirring tank is fixedly connected with a feed hopper, the top of the feed hopper is movably provided with a sealing plate, and the inner wall of the feed hopper is fixedly connected with an electric heating layer. A filter pipe is fixedly connected to the interior of the sealing plate, and a stirring rod is rotationally connected to the inner wall of the stirring tank. The asphalt stirring device has the following advantages and effects that blockage during discharging is prevented, asphalt is preheated, after the asphalt and other materials enter the stirring tank, the sealing plate is covered, the stirring rod rotates immediately, the stirring blades are driven to stir, the heating pipe is used for heating, the temperature of the stirring blades is increased, intermediate heating of the asphalt can be promoted, and the asphalt stirring effect is improved. The heat conduction plate is beneficial to heat conduction, asphalt is high in speed and uniform in heating, the stirring efficiency is improved, waste gas generated by heating is filtered and discharged from the filter pipe, and the practicability of the feeding hopper is improved.