126 results about "Bituminous concrete" patented technology

The invention discloses a movable asphalt concrete waste regeneration treatment device, and relates to the technical field of asphalt concrete waste regeneration, the movable asphalt concrete waste regeneration treatment device comprises a base, the top of the base is provided with a box body, and the box body is internally provided with a storage box; the fixed cylinder is fixed to the top of the base, and a stirring assembly is rotationally arranged in the fixed cylinder; the power assembly is arranged at the top of the fixed cylinder, and the power assembly is used for driving the stirring assembly to work; the backflow assembly is arranged at the bottom of the fixed cylinder, and the backflow assembly communicates with the box body; and the asphalt conveying assembly is arranged on the inner wall of the box body. According to the asphalt concrete waste regeneration device, the stirring assembly can be driven to work through the power assembly, and in the working process of the stirring assembly, the asphalt conveying assembly is driven to work, so that asphalt in the storage box is input into the stirring assembly, the asphalt and waste are mixed, and regeneration of the asphalt concrete waste is achieved.

The invention relates to the technical field of asphalt concrete detection, in particular to an asphalt concrete strength detection device which comprises a press machine, an upper pressing plate and a lower placing table, the protective cover is movably arranged in a base of the press machine; the gas injection mechanism is linked with the protective cover and is driven by the upward movement of the protective cover; the annular air bag is arranged on the periphery of the lower placement table and communicated with the air injection mechanism, automatic centering of the concrete sample is achieved through radial pushing of the annular air bag, and the problem that it is difficult to guarantee that the sample and the pressing plate are strictly coaxial through traditional manual placement is solved; the air bag is completely deflated and shrunk before being pressurized and is separated from the side wall of the sample, so that the interference of lateral supporting force on a detection result is thoroughly eliminated, the phenomenon that the strength value is virtually high due to constraint stress is avoided, and the accuracy and repeatability of the compressive strength test are effectively improved.

The invention discloses an asphalt concrete mixing quality evaluation method based on digital twinning. A power sensor, a three-axis vibration acceleration sensor and an infrared temperature sensor array are arranged at key nodes of a stirring cylinder, and multi-physical field data in the stirring process are collected in real time and mapped to a three-dimensional digital twinborn model. A self-adaptive wavelet threshold algorithm is adopted to carry out noise reduction on power and vibration signals, and a dynamic time warping algorithm is utilized to realize time alignment of multi-source signals. High-dimensional features such as fluctuation variance, power spectral density peak ratio, vibration entropy, temperature variation coefficient and the like are extracted, and significant features are screened through an XGBoost model; the method comprises the following steps: constructing a time sequence evolution rule of a long-short-term memory network capture feature with a time attention mechanism, automatically weighting influence weights of different stirring stages, and finally outputting a comprehensive uniformity index to quantitatively evaluate the stirring quality of asphalt concrete, thereby providing technical support for intelligent production and quality online management and control.

The invention relates to the technical field of asphalt concrete, and discloses an asphalt concrete joint processing flatness detection device, which comprises a plurality of support rods I rotatably connected to the outer walls of a plurality of movable rings, and a plurality of support rods II rotatably connected to the outer walls of a plurality of fixed rings; as the linear speed of the wheels running on the old road surface is larger than that of the wheels on the other side, the centrifugal force borne by the balancing weight on the side is large, the balancing weight is far away from the supporting shaft, when the balancing weight moves, the connecting position of the first supporting rod is driven to be far away from the supporting shaft, and at the moment, the second supporting rod rotates around the connecting position of the second supporting rod and the fixing ring; movement of a movable ring drives a movable rod to get close to a side plate, mutual friction between the movable rod and the side plate is caused, finally, the speed of a supporting shaft is reduced, further, the speed of wheels on the side of the old road surface is reduced under the action of the mechanism, and therefore the situation that friction force is different on the new road surface and the old road surface is reduced. And the influence of the deviation of the detection route on the detection result is avoided.

The invention belongs to the technical field of bridge construction, and discloses a fabricated bridge expansion device anchoring structure and a construction technology, the fabricated bridge expansion device anchoring structure comprises a first beam body and a second beam body, the first beam body and the second beam body are respectively provided with a mounting groove, the top of each mounting groove is connected with a plurality of connecting pieces, and the outer sides of the plurality of connecting pieces on the same side share an expansion joint structure; the connecting pieces comprise bottom plates and high-strength bolts, the bottom plates are connected with side plates, bolt holes are formed in the bottom plates, steel bar holes are formed in the side plates, transverse steel bars are slidably connected to the inner walls of the steel bar holes, and the first beam body and the second beam body are each provided with a plurality of mounting holes. The connecting pieces are fixedly connected with the corresponding first beam body and second beam body through the mounting holes and high-strength bolts, and the high-strength bolts are in threaded connection with nuts. According to the method, only the thin asphalt concrete surface layer needs to be cut off, the main body structure of the bridge cannot be damaged, mechanical anchoring is conducted through the connecting pieces and the high-strength bolts, and rapid and reliable connection between the expansion joint structure and the bridge structure is achieved.

The utility model discloses a feeding machine for asphalt concrete production, which comprises a machine body, the inside of the machine body is connected with a fixed block through a lifting mechanism, the fixed block is in sliding connection with a movable plate, and a feeding mechanism is arranged. After a push rod drives a movable plate to slide above a fixed block and a discharging hole in the movable plate coincides with a feeding port above a production device, a second motor drives a lead screw to rotate, so that a transmission belt above the lead screw rotates, and the transmission belt drives the lead screws on the two sides to rotate at the same time; at the moment, a sliding block above a lead screw moves, the sliding block drives a connecting block to be adjusted through a hinge shaft, meanwhile, after the connecting block is adjusted around a supporting rod, the connecting block drives a storage box to be adjusted, at the moment, the angle of the storage box is adjusted, and meanwhile a discharging mechanism is started to discharge materials in the storage box through a discharging port.

There is described a composition for use with aggregate which improves the wetting-out capabilities of bitumen, and therefore the resilience and ageing characteristics of asphalt concrete formed throu

The application discloses a steel bridge deck roller compacted asphalt concrete construction simulation method based on BIM, and relates to the technical field of simulation. The method first analyzes the geometric boundary of the BIM model and constructs an adaptive space-time sampling point set; then constructs a deep neural network introducing Fourier feature mapping, maps low-dimensional space-time coordinates into high-dimensional features to capture high-frequency physical changes; then establishes a composite loss function containing heat conduction, thermal coupling and boundary condition residual error, and uses automatic differentiation technology and an adaptive weight algorithm based on gradient statistics for unsupervised training; finally, the trained lightweight model is integrated into the BIM rendering engine. The application solves the problems of long time consumption of traditional finite element simulation calculation, inability of real-time interaction, and poor generalization ability of pure data-driven AI due to lack of internal measured data, and realizes real-time, high-precision dynamic simulation of the temperature field and stress field of the steel bridge deck pavement.

The invention relates to the technical field of asphalt concrete, in particular to thermally recycled asphalt concrete and a preparation method thereof, and the thermally recycled asphalt concrete is prepared from the following raw materials in parts by mass: 20-65 parts of waste asphalt mixture, 35-80 parts of new aggregate, 4.2-5.5 parts of regenerant, 1.8-2.5 parts of new asphalt and 2.5-3.5 parts of mineral powder, the regenerant is a binary nano composite regenerant, the binary nano composite regenerant is composed of a polyester compound and a nano reinforced phase, the polyester compound accounts for 95%-97% of the total mass of the regenerant, and the nano reinforced phase accounts for 3%-5% of the total mass of the regenerant. The binary nano-composite regenerant is adopted, the performance of old asphalt can be effectively recovered, the strength, high-temperature stability and durability of concrete are improved, the preparation method is reasonable in process, it can be guaranteed that all the raw materials are fully mixed, and the product performance is further improved.

The invention relates to the technical field of engineering materials, and provides anti-cracking steel slag asphalt concrete and a preparation method thereof. The anti-cracking steel slag asphalt concrete is prepared from, by weight, 4-6 parts of asphalt, 5-10 parts of filler and 60-70 parts of aggregate, the filler is prepared from, by weight, 20-30 parts of steel slag powder, 20-25 parts of limestone powder, 0.3-0.5 part of polypropylene fiber and 0.3-0.5 part of dispersing agent, and the polypropylene fiber is composed of first polypropylene fiber and second polypropylene fiber. The elastic modulus and the fiber length of the first polypropylene fiber are different from those of the second polypropylene fiber. According to the technical scheme, the problem of insufficient cracking resistance of the steel slag asphalt concrete in related technologies is solved.

The utility model relates to the technical field of concrete processing equipment, in particular to recycled asphalt concrete hot mixing equipment, which comprises a mixing drum, a gas filtering mechanism and a regenerant spraying mechanism, the gas filtering mechanism comprises a first connecting drum, and the first connecting drum is rotatably connected to the top of the mixing drum. Harmful gas in the mixing drum is sucked into the first connecting drum through the two fans, then the harmful gas is filtered by the filter screen and then discharged from the two air outlet holes, volatile organic compounds generated in the asphalt concrete regeneration process are collected and filtered in time, and environmental pollution is avoided; then the regenerant enters the space between the piston and the first rubber disc, the air cylinder drives the piston to move downwards, the regenerant between the piston and the first rubber disc is pushed into the two spraying pipes, and the regenerant is injected into the stirring barrel through the eight nozzles, so that the regenerant is uniformly dispersed into the material in the stirring process; the regeneration effect of the asphalt concrete is enhanced.

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.

The utility model provides an asphalt concrete sample batching device. The asphalt concrete sample batching device comprises a stirring box and a crushing mechanism, a feeding pipe and a discharging pipe are installed on the stirring box, threaded plugs are connected to the feeding pipe and the discharging pipe in a threaded mode, and a plurality of supporting column legs are fixedly installed below the stirring box; the crushing mechanism is mounted on the stirring box and comprises a crushing protection frame, the crushing protection frame is fixedly mounted at the top of the stirring box, a crushing groove is formed in the crushing protection frame, a driving shaft rod penetrates through the crushing groove, a rotary supporting ball is mounted on the driving shaft rod, and a plurality of uniformly distributed rotary crushing teeth are mounted on the rotary supporting ball; according to the asphalt concrete sample batching device, through the arrangement of corresponding mechanisms, large broken stones are not prone to being directly mixed into an asphalt concrete sample, so that the quality of asphalt concrete is not prone to being reduced, and unnecessary troubles are reduced for a user.

An asphalt concrete product comprising of the following materials: 69.6 grams of bitumen, 734.76 grams of coarse aggregates, 305.21 grams of fine aggregates, 90.43grams of fillers, and 12 grams (1%) to 36 grams (3%) dried cut pieces plastic wastes cooked altogether as asphalting materials conferring to the procedures of making asphalt concrete. The wastes out of plastic and cellophane will replace part of bitumen from 12grams (1%) to 36grams (3%) of the total parts in an asphalt concrete product. The product has the characteristics of significant lesser weight densities ranging from 2.157g / cm3 to 2.280g / cm3 , comparable water absorption rates at percentages from 0.224% to 0.397% and with improved Marshall Stability results from 3,593.64lbs to 3,620.80lbs.

This utility model discloses an asphalt concrete slab casting mold, comprising: a workbench, four templates, and a push-pull mechanism. The top surface of the workbench has a horizontal working plane. The four templates are slidably positioned on the working plane, forming a rectangular casting area. Each template abuts against adjacent templates via its side and inner walls, allowing the length and width of the casting area to be adjusted by sliding the templates. The push-pull mechanism is fixedly connected to the workbench and allows each template to slide along the working plane, thus expanding or shrinking the casting area. This invention solves the problem that existing asphalt concrete slab casting molds cannot adaptively adjust the casting dimensions according to actual needs.

The invention relates to the technical field of waste regeneration treatment, and particularly discloses asphalt concrete waste regeneration treatment equipment which comprises an equipment base, the side face of the equipment base is fixedly connected with a crushing device, the top of the crushing device communicates with a feeding pipe, and the bottom of the inner wall of the equipment base is fixedly connected with a material receiving groove; the bottom of the limiting frame is fixedly connected with a driving motor, the side face of the rotating gear is meshed with a rotating sleeve, the top of the rotating sleeve is fixedly connected with a vibrating frame, the top of the vibrating frame is rotationally connected with an extrusion block, and the bottom of the limiting frame is fixedly connected with a discharging pipe. A driving shaft of the driving motor penetrates through the bottom of the limiting frame and is rotationally connected with the bottom of the limiting frame, the driving shaft of the driving motor is fixedly connected with the bottom of the rotating gear, and the asphalt concrete waste recycling equipment achieves the purpose of crushing and recycling asphalt waste step by step.

The invention provides a preparation method of low-temperature anti-crack ultrathin overlay asphalt concrete. The preparation method comprises the following steps: acquiring stirring torque data and stirring temperature data in a stirring process, and preprocessing; constructing a torque sliding window, calculating a range change rate, and judging whether the modifier and the toughening material reach a dispersed state or not based on the range change rate; constructing a temperature sliding window, calculating an aging cumulative equivalent, and judging the aging risk of the asphalt in the stirring process based on the aging cumulative equivalent; and according to the dispersion state and the aging risk level, determining a stirring preparation completion state and executing a corresponding control strategy. By monitoring the stirring torque and temperature in real time, dynamically evaluating the dispersion degree of the material and the asphalt aging risk, and automatically executing control strategies such as discharging, continuous stirring, cooling stirring or shutdown alarming, asphalt thermo-oxidative aging is effectively inhibited while uniform dispersion of the modifier and the toughening material is ensured; the low-temperature crack resistance and the preparation quality stability of the ultrathin overlay asphalt concrete are improved.

The present application relates to the technical field of road engineering material quality detection, and particularly relates to a method and system for testing the content of lignin fiber in asphalt mixture, wherein the method first extracts an initial sample from a target asphalt pavement and records the sample quality of the initial sample, then crushes the initial sample to obtain a crushed sample, extracts and separates the crushed sample to obtain a first mixture from which asphalt is preliminarily removed, then centrifugally processes the first mixture to obtain a second mixture, removes impurities from the second mixture and purifies the second mixture to obtain lignin fiber to be tested, and finally, after drying the lignin fiber to be tested, the content is calibrated based on the sample quality, and the content of lignin fiber in the target asphalt pavement is calculated. Compared with the prior art, the method is suitable for testing the content of lignin fiber in SMA asphalt concrete and PAC asphalt concrete, and can accurately test samples with a lignin fiber content of 0.1% or more.

The application discloses a multi-branch ditch terrain pumped storage power station reservoir bottom drainage system and a construction method thereof, which comprises a drainage gallery, a gallery cushion and a gravel drainage layer; the drainage gallery is arranged at the bottom of a reservoir bank asphalt concrete panel and located at the joint part of the reservoir bank and the reservoir bottom; the gallery cushion is arranged below the drainage gallery at the branch ditch part and is seated on a weak weathering zone; the gravel drainage layer is arranged on the upstream side and the downstream side of the gallery cushion and is located above the dam foundation excavation line and is in communication with the drainage system of the drainage gallery. The concrete cushion is additionally arranged below the drainage gallery at the branch ditch of the reservoir bottom, so that the bottom of the drainage gallery directly reaches the weak weathering layer, the risk of structural damage of the concrete drainage gallery caused by uneven settlement of the backfilling stone residue at the branch ditch is effectively avoided, and the long-term operation safety of the drainage gallery located in the backfilling stone residue area of the branch ditch dam bottom is obviously ensured.

The utility model relates to the technical field of asphalt concrete mixing dust suppression, and discloses asphalt concrete mixing process dust suppression equipment which comprises a flange plate, an air inlet pipe is fixedly connected to the inner wall of the flange plate, a supporting frame is fixedly connected to the bottom of the air inlet pipe, and the rear end of the supporting frame is in threaded connection with a purification box. And the rear end of the purification box is in threaded connection with an exhaust pipe. When the limiting supporting blocks are rotated on the surface of the rotating frame, the limiting supporting blocks can be taken down from the surfaces of the limiting transverse rods, and then the limiting transverse rods are pulled to be disassembled from the top of the mounting frame and the top of the filter screen plate; a filter screen plate which works for a long time and adsorbs dust can be conveniently mounted and dismounted from the interior of the purification box, so that a worker can conveniently clean the filter screen plate, and the dust suppression efficiency of the equipment is improved.

The utility model relates to the technical field of paving devices, and discloses a paving device for an asphalt concrete surface layer of a municipal road, which solves the problems that the blanking port of the existing paving device is easily blocked by asphalt concrete, so that the blanking cannot be normally carried out, and the construction efficiency is influenced, and comprises a device main body, four universal wheels are rotatably installed at the bottom of the device body, a supporting table is fixedly installed on one side of the top of the device body, a handle is fixedly installed on the top of the device body, a containing tank is fixedly installed on the other side of the top of the device body, a hydraulic cylinder is fixedly installed on one side of the supporting table, and a pressing roller is rotatably installed at the transmission end of the hydraulic cylinder. A connecting frame is fixedly installed on one side of the device body, a servo motor is fixedly installed on one side of the connecting frame, eight stirring rods are arranged on the lower portion in the containing tank, and a discharging barrel is fixedly installed in the middle of the bottom of the containing tank. The discharging opening of the paving device cannot be blocked by asphalt concrete, so that normal discharging is guaranteed, and the construction efficiency is improved.

The utility model discloses a kind of batching devices of belt type asphalt concrete production, including conveyer, the inner side surface of conveyer is provided with transmission belt roller, the outer surface of transmission belt roller is equipped with transmission belt, the upper surface of one side of conveyer is fixedly connected with support seat, the inner side surface of support seat is connected with stirring drum by bearing ring, the inner side surface of stirring drum is fixedly connected with rotating shaft, the inner wall surface of stirring drum is fixedly connected with helical conveying rib piece, the outer end surface of transmission belt roller is fixedly connected with first belt pulley, the outer end surface of rotating shaft is fixedly connected with second belt pulley, the inner side of first belt pulley and second belt pulley is equipped with transmission belt, the outer end surface of transmission belt roller is connected with the drive shaft of motor, by adopting the same drive of conveying belt and stirring subassembly, horizontal stirring feeding is convenient, stirring and conveying adopt the same drive motor equipment, and it reduces overall cost.

The invention relates to a comprehensive rod scene suitable for vehicle-road cooperation and a test method, and relates to the technical field of automatic driving test, and the comprehensive rod scene comprises a section of asphalt concrete pavement, a plurality of variable comprehensive rods vertically arranged along one side of the asphalt concrete pavement at intervals of 50-100 meters, and edge computing servers embedded in the variable comprehensive rods, each variable comprehensive rod comprises a vertical rod, an anti-dazzle street lamp carried on the vertical rod and controlled by an edge calculator, a foldable sign module, a laser radar, a camera, an RSU and a traffic signal lamp, and the foldable sign module is located on the upper side and comprises a plurality of sign boards capable of stretching out and drawing back in the horizontal direction and moving in the vertical direction; the anti-dazzle street lamp is located on the top of the variable comprehensive rod and moves on the spatial three-dimensional coordinates. The method has the beneficial effects that the probability of errors caused by different illumination intensities and positions of the detection signboard and the traffic signal lamp of the automobile automatic driving at night is tested, so that a method for improving the automobile automatic driving is found.

The invention discloses an asphalt concrete feeding process optimization method based on an intelligent algorithm, and relates to the technical field of industrial process control. The method comprises the following steps: step 100, extracting three-dimensional dynamic characteristic data of a raw material; step 200, constructing a three-dimensional dynamic flow field model based on the three-dimensional dynamic characteristic data, realizing global prediction of the raw material flow velocity through the three-dimensional dynamic flow field model, and generating an unloading control instruction in combination with a dynamic pre-compensation logic and a drift adaptive correction logic; and the discharging control instruction is transmitted to the PLC, and a discharging execution mechanism is driven to act through the PLC. High precision, high adaptability and economical efficiency in the asphalt concrete feeding process are achieved, and the product performance stability and the industrial application value are remarkably improved.

The utility model relates to an asphalt concrete temporary storage bin temperature control system, which belongs to the technical field of concrete temporary storage bin temperature control and comprises a concrete foundation, three temporary storage bin bodies are arranged at the top of the concrete foundation, a main shaft is rotatably mounted in each temporary storage bin body, and stirring blades are fixedly mounted on the outer side of each main shaft at equal intervals. Supporting frames are fixedly connected to the two sides of the main shaft at equal intervals. The concrete temporary storage bin has the advantages that the main shaft rotates to drive the multiple supporting frames on the outer side of the main shaft to rotate, concrete attached to the side wall of the temporary storage bin body can be scraped off through the side wall scraping plates, power transmission can be achieved through the effect of the coupler, and the concrete temporary storage bin is convenient to use. In this way, concrete on the bottom wall of the temporary storage bin body can be scraped off through the bottom wall scraping plate, the phenomenon that the concrete is condensed due to the fact that the concrete is not cleaned for a long time is avoided, and the temperature control effect of the monitoring assembly and the heating assembly on the concrete is improved.

The utility model belongs to the technical field of auxiliary detection equipment for constructional engineering, and particularly relates to a drilling and sampling device for a hydraulic asphalt concrete impermeable panel. The drilling sampling device comprises a base, a supporting column, a position adjusting mechanism and a drilling mechanism, an avoiding opening is formed in the base, and the supporting column is fixedly arranged on the base; the position adjusting mechanism is arranged on the supporting column, the movable end of the position adjusting mechanism is connected to the drilling mechanism, the receding opening and the drilling mechanism are oppositely arranged, and the position adjusting mechanism drives the drilling mechanism to be close to or away from the receding opening. In the construction process, the position of the drilling mechanism can be adjusted through the position adjusting mechanism, so that pressure is continuously applied to the drilling mechanism, the drilling mechanism can drill holes in the hydraulic asphalt concrete anti-seepage panel under different conditions, and representative samples are obtained; therefore, the traditional mode that force is applied to the drilling mechanism to conduct drilling manually or through an external driver is replaced, construction safety is guaranteed, construction difficulty is lowered, and construction efficiency is improved.

The invention relates to the technical field of asphalt concrete mix proportion design methods, in particular to a modified hydraulic asphalt concrete mix proportion optimization method based on OED-MNLR-GA-PSO. The method comprises the following specific steps: 1, determining a mix proportion parameter of the modified hydraulic asphalt concrete, and carrying out test design through an orthogonal test; 2, establishing a modified hydraulic asphalt concrete data set by taking the bending strain, the compression resilience modulus and the water stability coefficient as research targets, and obtaining a nonlinear mapping relation function of the bending strain, the compression resilience modulus, the water stability coefficient and the mix proportion by utilizing a multiple regression model; 3, constructing a relational expression between the mix proportion parameters of the modified hydraulic asphalt concrete and the economic cost; and 4, establishing a constraint between the mix proportion and the performance, and realizing multi-objective optimization of the hydraulic asphalt concrete mix proportion based on GA-PSO. According to the design of the method, the mix proportion precision is higher, and the adaptive capacity is improved.

The utility model relates to the technical field of asphalt concrete preparation, and discloses an asphalt concrete anti-caking material preparation device which comprises a tank body used for preparing asphalt concrete, the bottom end of the tank body is provided with a material guide pipe, and the bottom end of the material guide pipe is a discharge port of the tank body; the stirring shaft is rotationally connected into the tank body, a scraper frame is fixedly connected to the peripheral side of the stirring shaft, the outer side wall of the scraper frame is in sliding contact with the inner wall surface of the tank body, and the interior of the scraper frame is of a hollow structure and is used for mixing asphalt concrete; the spiral blade is coaxially and fixedly connected to the bottom end of the stirring shaft, the spiral blade is rotationally connected into the material guiding pipe, and the material guiding pipe has a guiding effect in the direction away from the tank body. The condition that asphalt concrete caking blocks a discharge port can be reduced, and the practical effect of the preparation device is improved.

The application discloses a method for evaluating the durability of asphalt concrete using steel slag aggregate, a method for rapidly detecting the volume stability of steel slag aggregate, a method for detecting the volume stability of steel slag asphalt concrete, a method for detecting the relative strength attenuation of steel slag asphalt concrete after immersion, a method for detecting the relative fatigue life attenuation of steel slag asphalt concrete after immersion, a method for calculating the comprehensive evaluation index of the durability of steel slag asphalt concrete, and a method for calculating the comprehensive evaluation index of the durability of steel slag asphalt concrete.

The utility model discloses a batching device for asphalt concrete production, and particularly relates to the technical field of concrete production, the batching device comprises a mixing box, the upper end of the mixing box is fixedly connected with a protection box, the upper end of the protection box is fixedly connected with an opening and closing device, the upper end of the opening and closing device is fixedly connected with a feeding device, and the upper end of the feeding device is fixedly connected with a discharging device. A flow guiding device is fixedly connected to the interior of the material mixing box, a stirring box is fixedly connected to the lower end of the material mixing box, a third motor is fixedly connected to one side of the stirring box, a screw rod is fixedly connected to the output end of the third motor, and a discharging opening is fixedly connected to the right end of the stirring box. According to the batching device for asphalt concrete production, the feeding part can accurately control the feeding speed and feeding quantity of various raw materials according to the preset concrete mixing proportion, and the filtering part removes impurities in advance, so that the probability of equipment abrasion and failure can be reduced, and the service life of equipment is prolonged.