199 results about "Bituminous concrete" patented technology

The invention relates to an asphalt concrete image segmentation system and method based on a gating fusion mechanism. The system comprises a double-branch image acquisition module; a heterogeneous double-branch feature extraction module; a channel space alignment module; a multiple attention module; a gating fusion module; the invention relates to a lightweight high-resolution decoder module. According to the method, local texture features of a material and global semantic features of a structure are extracted based on double branches, cross-modal channel-space dimension matching is realized through a dynamic feature alignment mechanism, bidirectional cross attention interaction is established in combination with multiple attention collaboration, and then bidirectional cross attention features are dynamically fused by using gating weight, so that the cross attention interaction efficiency is improved. Details are recovered through progressive up-sampling; according to the method, the modal suppression phenomenon can be effectively inhibited, the multi-phase material interface segmentation precision is improved, the pixel-level semantic segmentation of the material microstructure is realized while the video memory efficiency is ensured, and the method is suitable for high-precision image analysis of heterogeneous composite materials such as poured asphalt concrete.

The invention belongs to the technical field of water conservancy projects and pumped storage projects, and discloses a layered injection construction method of a micro-stress ECC parting-free hydraulic anti-seepage panel. Aiming at anti-cracking and anti-seepage challenges of a large-scale seamless hydraulic panel, micro-stress high-ductility injection ECC is injected for multiple times in the thickness direction of the micro-stress ECC parting-free hydraulic panel to form a multi-layer composite integral panel, and transverse and longitudinal joints are not arranged; construction cold joints existing in each spraying layer are covered by the subsequent spraying layers, and the construction cold joints of the adjacent spraying layers do not coincide; and the integral micro-stress ECC joint-free hydraulic panel structure is formed by staggering and overlapping. And by means of the crack control design of staggered joint lap joint and twisting-capturing of the ECC layer face, cooperative improvement of structural bearing and crack resistance and seepage resistance is achieved. Compared with a traditional steel-concrete panel and a traditional asphalt concrete panel, the concrete panel has the advantages of being rigid and flexible, high in construction speed, economical, practical, high in deformation adaptability, resistant to void, resistant to freezing, durable and the like, and the problem that a traditional hydraulic panel gives consideration to crack resistance, seepage resistance and safe service is solved.

The utility model discloses a temperature-controllable asphalt concrete non-contact slope flow instrument device, which comprises a temperature control box and an angle adjusting device, the angle adjusting device comprises a bottom support, an adjusting plate and a base, the left end of the adjusting plate is rotatably connected with the bottom support, the base is arranged below the adjusting plate, a sample table is arranged on the upper surface of the base, and the sample table is connected with the temperature control box. The sample table penetrates to the position above the surface of the adjusting plate, a sample is arranged on the sample table, an adjusting screw is arranged on the upper surface of the base and penetrates to the position above the adjusting plate, an adjusting nut is arranged on the adjusting screw, and a heat insulation glass box is arranged on one side of the upper surface of the adjusting plate. A rechargeable battery, an angle display and a laser displacement sensor are arranged in the heat insulation glass box; according to the structure, an independent heat insulation glass box is adopted, a laser hole and a heat insulation film are arranged, and the heat insulation film is used for reducing errors, caused by refraction, of a laser beam penetrating through the high-temperature-resistant heat insulation glass box on the sample placement position and deformation data of the sample.

The invention discloses an asphalt concrete structure performance quantitative mapping method fusing multi-source parameters, and particularly relates to the field of road engineering materials, and the method comprises the following steps: S1, selecting asphalt concrete test pieces with uniform gradation and the same cementing material type and compaction mode, and carrying out a loading test by adopting a semicircular bending-tensile test, a UTM test system is combined with a DIC system to obtain mechanical response indexes including a macroscopic peak load Fmax and a microscopic maximum level principal strain Exxmax, and a test piece mechanical property response database is constructed; and S2, performing high-resolution image acquisition on the section of the test piece by using a digital image processing technology, and combining gray enhancement, edge detection and morphological operation. According to the method, the technical problems that structural parameter analysis is isolated, a coupling mechanism between parameters is missing, the prediction modeling capability is insufficient, and performance optimization cannot be performed under a fixed material system can be effectively solved.

The invention belongs to the technical field of asphalt concrete, and relates to modified asphalt concrete for a high-temperature-cold-shock environment and a preparation method of the modified asphalt concrete. The invention provides a preparation method of modified asphalt concrete used in a high temperature-cold shock environment, and the preparation method comprises the following steps: mixing basalt fiber, tannic acid and polyaniline, and stirring at 90-120 DEG C at a rotating speed of 150-300 rpm for 1-3 h to obtain modified basalt fiber; the preparation method comprises the following steps: heating asphalt until the asphalt is softened, adding SBS, and stirring and mixing to prepare SBS modified asphalt; and uniformly mixing the modified basalt fiber, the SBS modified asphalt and aggregate to obtain the modified asphalt concrete. The modified asphalt concrete provided by the invention still keeps relatively excellent mechanical and anti-permeability performances in a high-temperature-cold shock environment, and is suitable for an environment with a large cold and hot temperature difference as hydraulic asphalt concrete.

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 present invention discloses a connection structure between the foundation gallery and the cutoff wall of an asphalt concrete core rockfill dam, relating to the technical field of water conservancy and hydropower engineering. The structure comprises an upstream rockfill area and a downstream rockfill area; a transition material, a filter material, a high-plasticity clay area, and a dam foundation cover layer are sequentially arranged between the upstream and downstream rockfill areas from top to bottom; a foundation gallery is located within the high-plasticity clay area; the foundation gallery is connected to the dam foundation concrete cutoff wall, which in turn is connected to the asphalt concrete core wall. The present invention provides safe and reliable anti-seepage protection, strong deformation adaptability, a simple design, and ease of construction, making it suitable for connecting the foundation gallery and the cutoff wall of an asphalt concrete core rockfill dam.

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 present invention discloses an asphalt concrete block crushing device, which relates to the field of concrete recycling technology. The device comprises a base, a crushing piece is fixedly installed on the end of the base, and a protective ring is fixedly installed on one side of the base. The inner wall of the protective ring is clamped with a screening component, and the end of the screening component is connected to the crushing piece. The metal parts in the concrete block are screened out by the screening component. The asphalt concrete block crushing device effectively separates metal from concrete through the screening component, thereby reducing metal pollution and ensuring the purity of the material. At the same time, through magnetic separation, the efficiency of metal recovery can be improved, ensuring that more metal materials are extracted, and further improving the economic value of reuse.

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 invention discloses a production process of high-wear-resistance asphalt concrete, and the asphalt concrete comprises the following raw materials: 70-90 parts of matrix asphalt, 5-8 parts of modified SBS resin, 5-8 parts of organosilicon epoxy resin, 2-3 parts of functional filler, 0.1-0.5 part of benzoyl peroxide, 0.5-1 part of m-phenylenediamine, 1000-1200 parts of sandstone aggregate and 80-120 parts of mineral powder. Materimide on the functional filler can be grafted with a modified SBS resin molecular chain, meanwhile, an epoxy group on the modified SBS resin molecule can be cross-linked with organic silicon epoxy resin, an organic silicon molecular chain segment has very high flexibility, and the flexibility is beneficial to dispersing stress, reducing stress concentration and forming a plurality of cross-linking sites, so that the cross-linking effect is improved, and the service life of the organic silicon epoxy resin is prolonged. The composite structure of the bamboo fibers and the polyhedral oligomeric silsesquioxane can protect the asphalt concrete from cracking, so that the service life of the asphalt concrete is greatly prolonged.

The invention belongs to the technical field of light building materials, and particularly relates to a preparation method of high-crack-resistance nano-modified recycled asphalt concrete. The preparation method comprises the following steps: preheating the asphalt, then adding the modified recycled coarse aggregate, the fine aggregate, the mineral powder and the nanocrystalline cellulose, heating and stirring, and cooling to obtain the high-crack-resistance nano-modified recycled asphalt concrete. Through the synergistic effect of all the components, the anti-cracking performance of the concrete is effectively improved.

The invention discloses a sealed dust-free asphalt concrete mixer which comprises a tank body mechanism, the tank body mechanism comprises a mixing tank, the outer side of the mixing tank is fixedly connected with an outer heat insulation layer, and an assembly cavity is formed between the outer heat insulation layer and the mixing tank. According to the invention, through the arrangement of the dust removal mechanism, when broken stones and powdery raw materials are fed from the feeding hole, air flow can enter from the feeding hole by starting air extraction equipment, and in the process, dust and powdery materials generated by collision among the broken stones can be sucked in through flowing of the air flow, so that the dust is prevented from being splashed out from the feeding hole, and dust-free feeding is realized; the working environment is guaranteed, the use safety is improved, meanwhile, dust can be filtered through filter cloth, it is avoided that the dust is pumped out, and the proportion of raw materials is affected, so that the qualified rate of produced asphalt concrete is guaranteed, the outer ring is limited in an extrusion mode through arrangement of an extension sleeve and an assembly bin, and installation is more convenient.

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.

This invention relates to the field of new materials technology, providing an ultra-high performance asphalt concrete modifier, its preparation, and its application. The asphalt concrete modifier comprises: TPE, UHMWPE, substance A, a compatibilizer, and a dispersant. Substance A is one or more of graphene, graphite nanosheets, and graphene oxide. The TPE is one or more of SBS, SIS, SEBS, TPO, TPV, and TPU. The asphalt concrete modifier is prepared by first adding substance A to the dispersant and mixing thoroughly, then mixing the product with a thermoplastic elastomer, UHMWPE, and the compatibilizer, followed by extrusion granulation at 180–230°C. This asphalt concrete modifier exhibits excellent compatibility and adhesion with asphalt, comprehensively improves the overall performance of the mixture, prevents softening at high temperatures and cracking at low temperatures, significantly enhances fatigue resistance, improves the compaction ease of the mixture, and has a wide range of applications.

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 utility model relates to the technical field of stirring devices, in particular to an energy-saving asphalt concrete feeding and stirring device. Comprising a tank body, a motor and a sliding rail, and further comprises a stirring assembly which comprises a first gear arranged at the output end of the motor, a triangular rotating plate is rotationally installed at the bottom of the first gear, second gears are arranged at three round corners of the triangular rotating plate, third gears are rotationally installed at the bottoms of the second gears, and the third gears are in meshed connection with fourth gears; the stirring assembly is arranged on the equipment, the triangular rotating plate is fixedly installed below the motor, the stirring blades are arranged at the three round corners of the triangular rotating plate, and when the motor works, the three first stirring blades stir at the same time while the second stirring blades stir; the first stirring blade rotates around the first gear while stirring, so that stirring of asphalt concrete by the equipment is accelerated, the stirring time of the equipment is saved, the stirring efficiency is improved, and the equipment is more energy-saving.

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.