3385 results about "Asphalt" patented technology

The invention discloses an asphalt-based hard carbon material as well as a pre-oxidation preparation method and application thereof. Belongs to the technical field of asphalt-based hard carbon materials. The pre-oxidation preparation method comprises the following steps: carrying out primary pre-oxidation treatment on asphalt at 250-400 DEG C in air flow of 50-500mL / min; crushing the obtained primary pre-oxidized asphalt, and then carrying out secondary pre-oxidation treatment at 250-400 DEG C in air flow of 50-500mL / min to obtain secondary pre-oxidized asphalt; and carrying out carbonization treatment on the secondary pre-oxidized asphalt. According to the method, the asphalt can be kept in a solid-phase state to be subjected to efficient and thorough oxidation cross-linking reaction, the production cost is reduced, the obtained asphalt-based hard carbon material has high first coulombic efficiency and high capacity, and powerful support is provided for commercial application of sodium-ion battery negative electrode materials and rapid development of an energy storage technology.

The invention relates to the technical field of sodium-ion batteries, and discloses a super-crosslinked asphalt-based hard carbon material, a preparation method and application thereof, and a sodium-ion battery. Asphalt is subjected to super-crosslinking by adopting a mechanochemical method, and the asphalt, a crosslinking agent and a catalyst realize fracture and recombination of chemical bonds under the action of mechanical shearing force of grinding balls, so that the super-crosslinked asphalt-based hard carbon material is obtained. According to the present invention, the asphalt is subjected to segmented ball milling and super-crosslinking, and then carbonization sintering is performed, such that the asphalt cannot be subjected to molecular rearrangement so as to finally form the hard carbon material with the more suitable microporous structure and the more suitable interlayer spacing, such that the negative electrode ion embedding requirement of the sodium ion battery is met, the excellent sodium storage performance is represented, and the capacity and the first coulombic efficiency of the assembled battery are improved; the performance improvement of the sodium ion battery is integrally promoted. The method is low in energy consumption, short in time consumption, simple in parameter control and suitable for large-scale application and popularization.

The utility model relates to the technical field of asphalt production, and discloses a reaction kettle for asphalt production, which comprises a tank body, a stirring device is arranged in the tank body, and the stirring device comprises a stirring part; the stirring part comprises a stirring plate, a motor, a square rod and a mounting cylinder, the bottom surface of the motor is fixedly connected with the top surface of the tank body, and the mounting cylinder is slidably arranged on the outer surface of the square rod in a sleeving manner. According to the reaction kettle for asphalt production, a hydraulic rod, a connecting plate, a first connecting rod, a sliding block, a sliding rail, a sleeve and a second connecting rod are arranged, the hydraulic rod is controlled to extend, the sliding rail is pushed to move downwards, through the sleeve, the first connecting rod and the second connecting rod, a mounting barrel moves upwards, a stirring plate moves upwards, and asphalt on the upper layer is stirred; meanwhile, when the horizontal plate moves upwards, the asphalt on the bottom layer is pushed upwards, and when the horizontal plate moves downwards, the asphalt on the upper layer moves downwards, so that the asphalt on the upper layer and the asphalt on the lower layer are promoted to be mixed.

The invention relates to the technical field of asphalt production, in particular to a directly modified rubber powder asphalt production reaction device which comprises a reaction kettle, a stirring shaft is rotatably arranged in the reaction kettle, a plurality of stirring rods are arranged on the outer side of the stirring shaft, a plurality of expansion rods are rotatably arranged on the outer sides of the stirring rods, the stirring shaft is of a hollow structure, and the expansion rods are arranged on the outer side of the stirring shaft. An angle adjusting unit for driving the stirring rod to rotate is arranged in the stirring rod, a driving unit for driving the expansion rod to unfold on the outer side of the stirring rod is arranged in the stirring rod, and a plurality of temperature sensors are arranged on the inner wall of the reaction kettle. Diffusion of the modifier on a high-temperature low-viscosity surface layer is accelerated, film formation and gas retention are prevented, and uneven mixing caused by bubbles is reduced; the bottom stirring rods are small in unfolding angle, so that the bottom shearing strength is reduced, excessive stirring of deposited aggregate or modifier particles is avoided, and stable flowing of the bottom layer is maintained.

The invention discloses a mixing parameter regulation and control method and system for an SBS-T modified asphalt mixture and a terminal. The method comprises the following steps: analyzing a modification mechanism through a scanning electron microscope and X-ray photoelectron spectroscopy combined technology, dividing three stages of rapid melting and the like, and establishing a temperature-viscosity model; constructing a multi-scale capture system by using an atomic force microscope, a Fourier transform infrared spectrum and a dynamic shear rheometer; designing a five-factor three-level test matrix by adopting a response surface method, and establishing a road performance prediction model in combination with a BP neural network; mixing parameters are optimized in a multi-objective mode based on a genetic algorithm, and dynamic correction is achieved through an Internet of Things sensor and Kalman filtering. The system comprises a mechanism analysis module, a multi-scale detection module, a terminal integrated storage unit, a processing unit and a man-machine interaction unit. According to the scheme, the limitation of traditional single-factor analysis is broken through, microscopic and macroscopic collaborative optimization and dynamic parameter regulation and control are achieved, and the construction adaptability and precision are improved.

The invention discloses a low-carbon asphalt road periodic maintenance method based on an edge computing gateway, and the method comprises the steps: accessing a multi-source sensing device through the edge computing gateway, collecting road surface images, structural stress, environment and maintenance material carbon emission associated data, and carrying out the shunting conversion; calling a multi-modal feature fusion crack recognition algorithm to extract fusion crack features, and synchronously obtaining historical maintenance carbon footprint data; performing association mapping on the multi-dimensional data and then transmitting the data to a carbon-effect double-target maintenance period prediction model; a period prediction result is output through model feature weighting and dimension recombination, and dynamic correction is carried out in combination with material consumption rate data; calling a performance attenuation early warning algorithm driven by time sequence data to analyze the time sequence relevance, and generating early warning information; the edge cloud end cooperates with the carbon footprint monitoring platform to synchronize information to the terminal, and a maintenance execution scheme is generated in combination with different parameters. According to the method, the dynamic adjustment of the maintenance decision is realized, the road performance requirement is ensured, and the carbon emission minimization is realized.

The invention belongs to the technical field of engineering material detection, and particularly discloses an asphalt mixture dynamic water stability comprehensive detection system which comprises a standard test piece preparation module, a dynamic load loading module, a diffusion behavior analysis module, a sealing failure verification module and a water stability evaluation module. A detection area is limited through closed sealing treatment, a staged progressive increase dynamic load is applied to simulate an actual working condition, a three-dimensional moisture diffusion map is constructed to analyze diffusion behavior parameters, and a dynamic water stability grade evaluation result is generated in combination with an intelligent matching algorithm. According to the method, edge water seepage interference can be effectively avoided, the moisture diffusion process is accurately monitored, the performance of the asphalt mixture is comprehensively evaluated, and a scientific basis is provided for pavement structure design and material optimization.

The invention discloses a bio-based flexible cementing material and a cold-mix asphalt mixture, and relates to the field of adhesives. The bio-based flexible cementing material comprises 80-85 wt% of a component A and 15-20 wt% of a component B, the component A comprises bio-based polyol, natural asphalt, natural rubber, a tackifier and a bio-based plasticizer according to a weight ratio of (160-180): (45-55): (75-85): (140-160): (380-410), and the component B is an isocyanate cross-linking agent. The bio-based flexible cementing material is used as a cementing material of a cold-mixed asphalt mixture, can be directly constructed at low temperature or normal temperature, does not need to be heated to improve the flowability, is convenient to construct, can form a stable skeleton structure through crosslinking, and can form a stable structure under the cooperation of natural rubber and natural asphalt. The bio-based flexible cementing material has both high temperature resistance and low temperature resistance, and the stability of a road structure can be improved.

The invention relates to the field of waste gas treatment, and discloses an asphalt smoke treatment device for highway construction, the asphalt smoke treatment device comprises a spray tower body, a filter unit and a spray unit, the filter unit and the spray unit are both located in the spray tower body, and the filter unit can intercept and filter large particles in asphalt smoke entering the spray tower body. The first filter plate mechanism and the second filter plate mechanism are arranged in the spray tower body, double interception of large particles of asphalt smoke is achieved through an interception plate A and an interception plate B, a guide rod is matched to drive an ejector rod on a blockage clearing disc to accurately penetrate through a filter hole for blockage clearing, and a rotating ring slides and rotates along with the guide rod and drives the clearing plate to scrape impurities at the bottom of the interception plate; the power driving equipment controls the filter plate to deflect to assist in impurity falling, so that the problem that the spraying effect is influenced by increased filtering resistance and non-uniform impurity distribution caused by blockage of filter holes in the background art is effectively solved, the airflow circulation efficiency is guaranteed, and stable conditions are provided for subsequent spraying purification.

The invention belongs to the technical field of asphalt mixed material experiments, and particularly relates to test equipment for measuring the high-temperature stability performance of an asphalt mixed material, the test equipment comprises a test platform, an environment control module and a data acquisition module, the test platform comprises a test bracket, samples to be tested are uniformly arranged on an inclined adjusting plate on the test bracket, and the environment control module is connected with the data acquisition module; the data acquisition module comprises a laser displacement sensor, and the laser displacement sensor is arranged at the position, corresponding to the to-be-tested sample, of the adjusting plate; according to the invention, the laser displacement sensor located in the protection box is started at regular time, and the relative displacement change between the laser displacement sensor and the to-be-tested sample is calculated according to the change of the reflected laser, so that the actual deformation displacement of the to-be-tested sample is accurately measured and recorded and is transmitted to external computer equipment; and real-time and accurate data acquisition of the deformation degree of the to-be-tested sample is realized.

The invention relates to the technical field of waterproof coiled materials, and provides a macromolecule waterproof coiled material with a hook-and-loop fastener and a preparation method thereof.The macromolecule waterproof coiled material with the hook-and-loop fastener sequentially comprises the hook-and-loop fastener, a macromolecule sheet layer, a blocking layer, an upper gluing waterproof layer, a film-based macromolecule layer, a lower gluing waterproof layer and an anti-sticking layer from top to bottom; the upper adhesive waterproof layer and the lower adhesive waterproof layer are both modified self-adhesive asphalt sizing materials, and the modified self-adhesive asphalt sizing materials comprise asphalt, softening agents, styrene-butadiene-styrene block copolymers, butadiene styrene rubber, butyl rubber, tackifying resin, desulfurized rubber powder, filler and compatilizers. The filler is prepared from the following raw materials: carbon black, silicon dioxide, a silane coupling agent and 5-methylphenol-2-calcium sulfonate; the hook-and-loop fastener is a hook-and-loop fastener, the hook-and-loop fastener comprises a hook-and-loop fastener hook surface layer and a hook-and-loop fastener loop surface layer, and by means of the technical scheme, the problem that in the prior art, the high polymer waterproof roll is low in peel strength is solved.

The utility model relates to the technical field of coated asphalt production, in particular to a reaction kettle for heating high-soft-point coated asphalt, which comprises a kettle cover body, a reaction kettle body, a middle stirring shaft and an auxiliary stirring frame, the middle stirring shaft and the auxiliary stirring frame are mounted in the reaction kettle body, a planetary gear driving device is arranged at the upper end of the kettle cover body, and a driving motor is arranged at the upper end of the planetary gear driving device. And the driving motor is connected with the middle stirring shaft and can drive the middle stirring shaft to rotate. The stirring device is reasonable and compact in structure and convenient to use, the auxiliary stirring frame is driven by the planetary gear driving device to rotate, so that asphalt adhered to the side wall is effectively cleaned by the side scraping plate, and the effect of stirring mixed materials can be achieved; the auxiliary frame stirring blades on the auxiliary stirring frame and the middle shaft stirring blades of the middle stirring shaft are alternately distributed and form differential rotation, so that the stirring effect is effectively improved, materials at the bottom of the reaction kettle body are fully stirred through the lower scraping plate, the materials are prevented from sinking to the bottom, and the reaction kettle has the characteristics of high stirring efficiency, good stirring effect, simplicity, convenience, reliability and high efficiency.

The invention discloses a biomass-based hard carbon composite material quantitatively prepared based on a hard carbon pore volume and a method thereof, a negative electrode material and a battery. The method provided by the invention comprises the following steps: firstly, uniformly dispersing a pore-forming agent in biomass powder, pre-carbonizing, and washing to obtain a porous carbon matrix; according to the steps, pore forming is completed while pre-carbonization is completed, the porous carbon matrix with a certain pore volume is prepared, the dosage of the soft carbon precursor is designed based on the total pore volume in the subsequent steps, quantification and rationalization of the dosage of the soft carbon precursor can be achieved, the obtained product is good in performance consistency, and industrial production can be achieved. And the problem that subsequent soft carbon raw materials cannot be scientifically matched due to diversity of raw materials of biomass with different sources can also be avoided. Besides, by utilizing the chemical cross-linking reaction of asphalt and biomass carbon, not only is the carbon residue rate improved, but also a unique structure rich in closed pores and ultra-micropores is constructed, and the problems of low initial coulombic efficiency and insufficient platform capacity of traditional hard carbon are effectively solved.

The invention provides an asphalt mixture production quality defect traceability analysis method, which comprises the following steps of: acquiring time sequence process parameters such as raw material attributes, mixing temperature and paving speed and quality defect characteristics such as segregation degree, void ratio and compaction degree through a distributed sensor network and an image system, and performing filtering, denoising, standardization and characteristic zooming on the parameters; constructing a unified defect-parameter association data set; historical data and expert experience are utilized to establish a process semantic network and an extensible meta-path template, a defect propagation path is dynamically activated, node embedding and path weight are optimized through online comparative learning of a neural network, and defect cause chain visualization and future trend prediction are realized. According to the invention, the accuracy of defect tracing and the quality control efficiency of the production process are improved.

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.

The invention belongs to the technical field of sodium ion battery negative electrode material preparation, and particularly relates to an asphalt-based hard carbon material and a preparation method and application thereof, a negative electrode material and a preparation method thereof, and a sodium ion battery. In order to realize controllable preparation of high-value conversion, highly disordered and low-cost hard carbon of coal pitch, asphalt is used as a precursor material, modified asphalt is synthesized under the action of a solvent, a cross-linking agent and a catalyst, the hard carbon material is prepared through carbonization, and the hard carbon material is large in interlayer spacing and high in disordered degree and is accompanied with defects and closed pores, so that the high-value conversion, highly disordered and low-cost hard carbon is prepared. The preparation method is beneficial to reversible storage of sodium ions and improvement of the electrochemical performance of the sodium-ion battery, so that the sodium-ion battery is fully mixed with a conductive agent, an adhesive and deionized water to prepare slurry, the slurry is uniformly coated on a copper foil in a blade coating manner and is subjected to vacuum drying to prepare a negative electrode material, and the negative electrode material is matched with a corresponding counter electrode, electrolyte and a diaphragm to assemble the battery. The battery is low in cost, high in safety performance, relatively long in cycle life, high in rate capability and good in environmental sustainability.

The invention provides an all-component multi-source solid waste asphalt mixture design method and system, and relates to the technical field of data processing, and the method comprises the steps: carrying out the preprocessing of obtained test proportion data of a solid waste asphalt mixture, and generating a mixture data set; screening the mixture data set by using a preset constraint condition to obtain a plurality of candidate matching points meeting the performance index characteristics; the performance index characteristics comprise gradation structure characteristics related to particle size, bonding system characteristics related to high-temperature fluidity and water sensitivity, molding volume and construction characteristics related to porosity and saturation, and context embedding characteristics related to a service scene; splicing the performance index features and inputting the spliced performance index features into a trained gating expert network to obtain a corresponding performance prediction mean value and a performance fluctuation mean value; and performing reliability analysis on the candidate matching points based on the performance prediction mean value and the performance fluctuation mean value, and determining the candidate matching points of which the reliability is greater than a preset threshold value as target matching points.

The invention belongs to the technical field of RAP recycled asphalt mixtures, and particularly relates to a high-dosage RAP recycled asphalt mixture for alpine regions and a preparation method of the high-dosage RAP recycled asphalt mixture. The high-dosage RAP recycled asphalt mixture for the alpine region is characterized by comprising the following components in percentage by mass: 50-60% of RAP, 3-6% of mineral powder, 1-3% of new asphalt, 1-2% of a composite regenerant, 1-2% of a modifier and the balance of a new aggregate, the composite regenerant is composed of pine tar, plant-based epoxy ester oil, cashew nut shell oil and a penetrant. The modifier is prepared from regenerated low-density polyvinyl chloride, hyperbranched epoxy resin and liquid polybutadiene rubber coated waste rubber powder. According to the technical scheme provided by the invention, the technical problems of poor low-temperature performance, water stability and freeze-thaw cycle stability when a high-dosage RAP recycled asphalt mixture is used in an alpine region are solved.

The invention relates to the technical field of sodium ion batteries, and discloses plant tar phenolic resin in-situ modified asphalt and a method for preparing a hard carbon material by using the plant tar phenolic resin in-situ modified asphalt. The preparation process of the method comprises the following steps: (1) mixing and dispersing; (2) carrying out hydrothermal polymerization; and (3) high-temperature carbonization. The plant tar is used as a raw material, low-cost phenolic resin is prepared through a hydrothermal reaction, asphalt molecules are doped in situ in the synthesis process, the asphalt molecules participate in the cross-linking process, a more complex mixed polymer is formed, the graphitization process in the high-temperature carbonization process is inhibited, and the high-performance phenolic resin is prepared. And finally, the sodium ion battery negative electrode hard carbon material with excellent sodium storage capacity and good cycle performance is prepared. The raw materials are wide in source, the production cost of the hard carbon material is remarkably reduced, the method has a wide mass production prospect, and an economical and efficient technical scheme is provided for industrial application of the hard carbon material.

The invention discloses high-performance asphalt-based porous carbon and a preparation method and application thereof.The preparation method comprises the following steps that refined asphalt is heated and stirred, then oxygen-containing gas is introduced, and oxygen-containing modified pre-oxidized refined asphalt is obtained through segmented heating oxidation treatment; heating the pre-oxidized asphalt to different temperatures in different stages in an inert atmosphere for pre-carbonization; placing the pre-carbonized product in a hydrogen-containing mixed atmosphere, and dynamically regulating and controlling the carbonization process according to asphalt components; and mixing the carbonized product with potassium hydroxide and sodium hydroxide mixed alkali, carrying out multi-temperature-zone stepped activation, washing, and drying to obtain the asphalt-based porous carbon. According to the invention, refined pitch is directly used as a carbon source raw material, pre-oxidation is carried out to obtain a partial oxygen-containing hard carbon structure, low-temperature pre-carbonization is carried out to obtain a carbonized precursor with very few volatile components, porous carbon is subjected to moderate graphitization through carbonization, the conductivity of a skeleton is improved, the skeleton is further subjected to pore forming through activation, and the high-performance porous carbon material is obtained.

The invention relates to the field of modified asphalt mixtures, and provides an SBS / waste tire rubber powder composite modified asphalt mixture and a preparation method thereof. The SBS / waste tire rubber powder composite modified asphalt mixture comprises coarse aggregate, fine aggregate, mineral powder, an SBS modifier, modified waste tire rubber powder, a composite bio-based silane coupling agent and matrix asphalt, wherein the modified waste tire rubber powder is obtained through interface pre-modification; according to interface pre-modification, sulfur-sulfur cross-linking bonds in rubber powder are selectively broken through a regeneration activating agent; enabling the surface of the waste tire rubber powder to be self-assembled through an interface guiding agent to form a nano interface layer; the high-temperature stability, low-temperature crack resistance, water stability and aging resistance of the SBS / waste tire rubber powder composite modified asphalt provided by the invention are remarkably improved, and the SBS / waste tire rubber powder composite modified asphalt is green, environment-friendly and high in fatigue self-repairing capability.

The invention proposes a steel slag asphalt interface adhesion work prediction method based on a physical neural network, and relates to the technical field of deep learning, and the method comprises the steps: obtaining chemical component parameters and environmental impact factors of a steel slag asphalt mixture interface sample; creating an original neural network prediction model based on a diffusion item, a reaction source item, a multi-mechanism dissipation item and a state variable corresponding to spatial-temporal evolution of the adhesion work; inputting the chemical component parameters and the environmental impact factors into an original neural network prediction model, and generating interface adhesion work prediction parameters in combination with physical constraint terms; training the original neural network prediction model by using the interface adhesion work prediction parameters and a gradient descent algorithm to obtain a target neural network prediction model; the physical constraint items comprise data loss, PDE residual error loss, state equation loss and boundary condition loss; and inputting the chemical component parameters and the environmental impact factors of a to-be-tested material into the target neural network prediction model to obtain target prediction parameters.

A fiber asphalt flexible anti-crack seal parameter type selection and design method comprises the following steps: S1, establishing a strength prediction model: combining feature design and a support vector machine algorithm, and constructing nonlinear coupling features of asphalt consumption, fiber consumption and fiber length to obtain a strength prediction model; training the support vector regression model to obtain a prediction model of the tensile strength of the bridge deck waterproof layer under different material combinations; s2, establishing a waterproof performance theoretical model of the waterproof layer: obtaining a function relationship among the equivalent stress length of the waterproof layer, the thickness of the waterproof layer and the tensile strength based on a cracking principle of the waterproof layer and stress balance of the waterproof layer, obtaining a theoretical model of the critical crack width Wt of the waterproof layer and a waterproof performance correlation coefficient of the waterproof layer combined by different materials; and S3, designing the waterproof layer of the bridge deck slab: selecting a material combination of the waterproof layer with the optimal economical efficiency based on the crack width of the bridge deck slab in combination with the prediction model of the tensile strength of the waterproof layer of the bridge deck slab and the waterproof performance theoretical model of the cracked waterproof layer of the bridge deck slab.

The invention relates to the technical field of building materials, in particular to a high-elasticity polyurethane-asphalt composite road crack repair material and a preparation method thereof, and the high-elasticity polyurethane-asphalt composite road crack repair material comprises the following raw materials: an asphalt-based material, functional modified polyurethane, a polyether-polyolefin block copolymer, functional rubber, 2, 6-di-tert-butyl-4-methylphenol and sodium polyacrylate. According to the invention, a lipophilic functional group is introduced into a molecular chain of the functionalized modified polyurethane, so that the functionalized modified polyurethane can interact with alkyl in asphalt to form a more stable synergistic network structure, and the phase separation phenomenon of the polyurethane and the asphalt is effectively reduced; the modified polyurethane not only improves the elasticity, flexibility, temperature resistance and crack resistance of the composite material, but also optimizes the processability of the material, enhances the interface bonding force, and further improves the repair effect and the road durability.

The invention discloses asphalt-based hard carbon, a preparation method thereof and a sodium-ion battery negative electrode material, and relates to the technical field of sodium-ion batteries. The preparation method of the asphalt-based hard carbon comprises the following steps: S1, mixing an asphalt precursor, a sulfur source and a cross-linking agent, and performing cross-linking vulcanization treatment at a first temperature to obtain a primary product; s2, performing carbonization treatment on the primary product at a second temperature to obtain asphalt-based hard carbon; the sulfur source is any one of elemental sulfur, thiourea, dimethyl sulfide and sulfide, or any two of elemental sulfur, concentrated sulfuric acid, thiourea, dimethyl sulfide and sulfide. By adopting the method, the type of the sulfur source is controlled, and the sulfur source and the cross-linking agent are added, so that the reversible capacity and the rate capability of the asphalt-based negative electrode material can be effectively improved, and the application field of the asphalt-based negative electrode material is widened.

The invention discloses a plant oil-based self-healing asphalt modifier based on dynamic crosslinking and a preparation method and application thereof, and belongs to the technical field of plant oil-based modifiers. The preparation method of the plant oil-based self-healing asphalt modifier based on dynamic crosslinking comprises the following steps: fully swelling a styrene thermoplastic elastomer in plant oil; swelling gel is obtained; a cross-linking agent and a vulcanization accelerator are added into the swelling gel, and the plant oil-based self-healing asphalt modifier is obtained through a vulcanization reaction; the plant oil-based self-healing asphalt modifier based on dynamic crosslinking provided by the invention is simple in preparation method, and compared with traditional SBS modified asphalt, the plant oil-based self-healing asphalt modifier has more excellent temperature sensitivity, self-healing property and storage stability, the construction process is lower-carbon and more environment-friendly, and the plant oil-based self-healing asphalt modifier has excellent environmental benefits.

The invention discloses an intelligent temperature control production system for an environment-friendly asphalt cold patch additive, and relates to the technical field of asphalt cold patch additive production, and the system comprises a controller initial modeling module which is used for recording the currently set proportional-integral-differential controller parameters, and constructing a reference control feature vector used for representing the initial response behavior of a controller; and the thermal load response identification module is used for applying micro-amplitude step type temperature disturbance to the to-be-heated environment-friendly asphalt cold patch additive and extracting a thermal load characteristic vector representing the thermal response characteristic of the additive. According to the method, intelligent matching and full-time-domain response evaluation are realized by constructing control and thermal load feature vectors and combining cross-correlation and grey correlation analysis; a sliding spectrum entropy and self-adaptive parameter correction mechanism is introduced, a closed-loop regulation system is constructed, the suitability, stability and additive dispersing performance of a temperature control system are effectively improved, and the problems of control lag and fluctuation are solved.

The invention discloses an environment-friendly construction method for in-situ cold regeneration of foamed asphalt based on old material regeneration, aims to solve the problems of unstable performance of a mixture and insufficient utilization of old materials caused by diverse characteristics of the old materials in a traditional in-situ cold regeneration process of the foamed asphalt, and provides a dynamic adaptive construction method. The method comprises the following steps: firstly, detecting the passing rates of 19mm and 0.075 mm sieve pores of an old material and the penetration of asphalt at 25 DEG C; dividing into three grades according to grading, and dividing the aging degree into three degrees; dynamically adjusting the mix proportion, the pre-wetting parameters of the bio-oil-based regenerant and the old material doping temperature according to grading; according to the method, the performance of the regenerated mixture is ensured, the utilization rate of old materials is increased, and the method has both environmental protection and economic benefits.

The invention belongs to the technical field of asphalt, and particularly relates to modified asphalt and a preparation method and application thereof.The modified asphalt comprises matrix asphalt and a modified asphalt additive, the modified asphalt additive comprises rubber powder, basalt fibers and lignin fibers, and the adding amount of the rubber powder is 24.3%, the adding amount of the basalt fibers is 0.32%, and the adding amount of the lignin fibers is 0.08%. According to the method, statistical analysis, prediction model development and numerical optimization are carried out by utilizing a response surface method (RSM), a formula capable of enabling the softening point to reach the maximum value is determined within the range of 15%-25% of rubber powder mixing amount, 0-0.4% of basalt fiber and 0-0.4% of lignin fiber content, a scientific basis is provided for actual production, and the quality and production efficiency of the modified asphalt are improved.

The invention discloses a multifunctional asphalt mixture rut test method which is implemented by using a device integrating loading and measurement, test piece supporting and temperature control drainage, environment simulation and optical measurement and a central control and data acquisition system. A test piece is arranged in the test piece groove, temperature control is realized through circulating a heat-conducting medium in the temperature-conducting cavity, different gradients are formed through the hoisting mechanism and the angle adjusting assembly, the test wheel is driven to perform one-way circulating loading along a closed track and snub at a preset moment, and rolling and sliding friction forces are synchronously collected; in the test process, rainfall is simulated by adopting the watering assembly, incoming water is recycled by the drainage tank, speckle images are acquired by the high-frequency industrial camera, and surface full-field displacement and strain are obtained through digital image correlation analysis. Through time registration and fusion of temperature, gradient, wheel speed, rainfall and friction-deformation data, rut deformation, skid resistance and apparent structure evolution laws of the asphalt mixture under multi-climate and multi-gradient conditions are obtained.