Preparation process of cold-mixed and cold-paved water-based acrylic acid hybrid epoxy environment-friendly asphalt material

Abstract

The application relates to the technical field of asphalt material preparation, in particular to a cold-mixing and cold-paving water-based acrylic acid hybrid epoxy environment-friendly asphalt material preparation process, which comprises the following steps: physically mixing water-based acrylic acid emulsion and water-based epoxy emulsion to obtain water-based acrylic acid hybrid epoxy emulsion; adding asphalt pavement milling material and an activator into a vibrating stirring device, stirring to obtain activated milling material; after obtaining the activated milling material, continuously adding the water-based acrylic acid hybrid epoxy emulsion, a curing agent and a cold-mixing asphalt modifier into the vibrating stirring device, and stirring at normal temperature to coat; adding pure water into the vibrating stirring device, collecting the torque of the vibrating stirring device and the temperature of the asphalt mixture within a preset time period after the pure water is added; determining a local coating unevenness evaluation value and a viscosity evaluation coefficient of the asphalt mixture; and regulating and controlling the curing reaction in the vibrating stirring device to obtain prepared asphalt material. The application improves the mechanical properties of the prepared asphalt material.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of asphalt material preparation, in particular to a cold-mixing and cold-paving water-based acrylic acid hybrid epoxy environment-friendly asphalt material preparation process. BACKGROUND

[0002] After long-term use of asphalt pavement, diseases such as pits, loose and peeling will occur, and timely repair is needed. There are two types of pavement repair, namely hot repair method and cold repair method. The hot repair method mainly uses hot-mixed asphalt mixture, which needs to be heated at high temperature during production and construction, and emits a large amount of smoke and harmful gas. The remaining materials after repair are wasted, and the construction cannot be carried out in low temperature and rainy weather. The cold-mixing and cold-paving technology usually takes emulsified asphalt as the core, and applies the reclaimed asphalt pavement material (RAP) to the base or surface layer of the highway, which can be constructed at room temperature, simplifies the construction procedure, is easy to operate, and saves energy and resources.

[0003] As a high-performance water-based environment-friendly material that takes into account the weather resistance of acrylic acid and the mechanical strength of epoxy resin, the water-based acrylic acid hybrid epoxy environment-friendly asphalt material needs to introduce a water-reactive cold repair agent into the emulsified asphalt vibration and stirring regeneration vehicle during production and construction. The water-reactive cold repair agent reacts with water to promote the curing of the cold-mixing and cold-paving asphalt material and improve the initial strength and durability. However, the porosity and aging degree of the asphalt pavement milling material (RAP) are different, and the single water addition mode of the emulsified asphalt vibration and stirring regeneration vehicle cannot adapt to the water content fluctuation of the asphalt pavement milling material and the change of environmental temperature and humidity, which directly affects the curing process and effect of the asphalt mixture and finally reduces the product performance of the prepared asphalt material. SUMMARY

[0004] To solve the above technical problems, the application provides a cold-mixing and cold-paving water-based acrylic acid hybrid epoxy environment-friendly asphalt material preparation process to solve the existing problems.

[0005] The cold-mixing and cold-paving water-based acrylic acid hybrid epoxy environment-friendly asphalt material preparation process provided by the application adopts the following technical scheme:

[0006] One embodiment of the application provides a cold-mixing and cold-paving water-based acrylic acid hybrid epoxy environment-friendly asphalt material preparation process, which comprises the following steps:

[0007] First, the water-based acrylic acid emulsion and the water-based epoxy emulsion are physically mixed to obtain a water-based acrylic acid hybrid epoxy emulsion;

[0008] Secondly, the asphalt pavement milling material and the activator are added to the vibration and stirring equipment, and the activated milling material is obtained after stirring. After obtaining the activated milling material, the water-based acrylic acid hybrid epoxy emulsion, the curing agent and the cold-mixing asphalt modifier are added to the vibration and stirring equipment, and the stirring and coating are carried out at room temperature.

[0009] Finally, pure water is added to the vibrating stirring device, and the torque of the vibrating stirring device at each time and the temperature of the stirred asphalt mixture at each time are collected within a preset time period after the addition of the pure water;

[0010] The temperature mutation degree and the proportion of the time at which the temperature mutates at each time are analyzed to determine the temperature sudden rising strength of the asphalt mixture, and the linear change trend of the temperature of the asphalt mixture is combined to obtain a local uneven coating evaluation value of the asphalt mixture;

[0011] The viscosity evaluation coefficient of the asphalt mixture is determined by the difference between the trend characteristics of the torque at each time and the trend characteristics of the torque of the standard asphalt material during preparation.

[0012] The local uneven coating evaluation value and the viscosity evaluation coefficient are used to regulate the solidification reaction in the vibrating stirring device to obtain the prepared asphalt material.

[0013] In one embodiment, the mass ratio of the aqueous epoxy emulsion to the aqueous acrylic emulsion during physical mixing is 3:1 to 5:1.

[0014] In one embodiment, the mass ratio of the asphalt pavement milling material to the activator is 100:7 to 15:1, and the particle size of the asphalt pavement milling material is ≤8 mm.

[0015] In one embodiment, the stirring time after the activated milling material is obtained is 2 to 5 minutes.

[0016] In one embodiment, the mass ratio of the aqueous acrylic hybrid epoxy emulsion to the curing agent is 2:1, the mass ratio of the aqueous acrylic hybrid epoxy emulsion to the asphalt pavement milling material is 20:1, and the mass ratio of the cold-mixed asphalt modifier to the asphalt pavement milling material is 100:1.5 to 100:2.5.

[0017] In one embodiment, the stirring time at room temperature is 2 to 5 minutes, and the curing agent is a polyamide curing agent.

[0018] In one embodiment, the determination of the temperature sudden rising strength includes:

[0019] All collected temperatures at each time are smoothed, the difference between the temperature before smoothing and the temperature after smoothing at each time is calculated, and the time at which the difference is greater than a preset temperature threshold is taken as the sudden rising time.

[0020] The cumulative sum of the difference between the difference value and the temperature threshold at all sudden rising times is calculated, and the temperature sudden rising strength is positively correlated with the cumulative sum and the proportion of the sudden rising time in all times.

[0021] In one embodiment, the determination of the local coating unevenness evaluation value comprises:

[0022] Linear fitting is performed on the smoothed temperature at all times, the mean of fitting errors at all times is calculated, and the local coating unevenness evaluation value is a fusion result of the mean and the temperature surge intensity.

[0023] In one embodiment, the determination of the viscosity evaluation coefficient comprises:

[0024] The trend item of the torque at each time is obtained by using a time series decomposition algorithm, the slope of the trend item at all times is obtained, denoted as a first slope, and correspondingly, the second slope is obtained for the trend item of the torque corresponding to the standard asphalt material during preparation, and the ratio of the first slope to the second slope is taken as the viscosity evaluation coefficient.

[0025] In one embodiment, the regulation of the solidification reaction in the vibrating mixing device comprises:

[0026] The local coating unevenness evaluation value and the viscosity evaluation coefficient of the asphalt mixture are overall evaluated by using a machine learning algorithm, and the evaluation result includes three types of over-solidification, under-solidification and appropriate solidification.

[0027] When the evaluation result is over-solidification, 0.1-0.3% of the total mass of the asphalt mixture is added to the vibrating mixing device as water reducing agent;

[0028] When the evaluation result is under-solidification, 10-20% of the amount of pure water that has been added is added to the vibrating mixing device as pure water;

[0029] When the evaluation result is appropriate solidification, no additional treatment is performed on the solidification reaction in the vibrating mixing device.

[0030] The present application has at least the following beneficial effects:

[0031] The present application monitors the torque of the vibrating mixing device at each time and the temperature of the mixed asphalt mixture at each time, reflects the mixing resistance and temperature change characteristics of the asphalt mixture, determines the local coating unevenness evaluation value and the viscosity evaluation coefficient of the asphalt mixture, evaluates the local coating uniformity and viscosity change of the asphalt mixture, realizes the evaluation and targeted control of the solidification reaction process of the asphalt mixture, regulates the solidification reaction in the vibrating mixing device by using the local coating unevenness evaluation value and the viscosity evaluation coefficient, overcomes the problem that the traditional single water addition mode is difficult to adapt to the water content fluctuation of the asphalt pavement milling material and the change of the environmental temperature and humidity, ensures the stability of the solidification process of the asphalt mixture, improves the control precision of the solidification reaction of the asphalt mixture, and further improves the compactness and strength of the final prepared asphalt material product, significantly enhances the mechanical properties of the asphalt material product.

[0032] The application has weather resistance of acrylic and mechanical strength of epoxy resin by preparing the water-based acrylic hybrid epoxy emulsion, introducing the water reactive cold patching agent and other processes, effectively reduces the porosity, improves the compactness, and has stronger pulling strength and splitting strength, prolongs the service life of the asphalt road, and reduces the subsequent maintenance cost.

[0033] The cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material prepared by the application avoids the problem of emission of a large amount of smoke and harmful gas due to high-temperature heating in the production and construction process of the hot repair method, reduces environmental pollution, and can utilize waste asphalt pavement materials (RAP) for recycling and application in the base or surface layer of the highway, realizing the recycling of resources. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0035] Figure 1 A step flow chart of a cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material preparation process provided by the application;

[0036] Figure 2 A curing reaction control flow chart of the asphalt mixture. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the application to achieve the predetermined invention purpose, the following describes the specific embodiments, structure, characteristics and effects of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material preparation process according to the application in combination with the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs.

[0039] The specific scheme of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material preparation process provided by the application is described in detail below in combination with the drawings.

[0040] Embodiment 1

[0041] Referring to Figure 1 which shows a preparation process flow chart of a cold-mixed and cold-paved water-based acrylic acid hybrid epoxy environmentally friendly asphalt material provided by Embodiment 1 of the present application, the process includes:

[0042] Step S001, physically mix the water-based acrylic acid emulsion and the water-based epoxy emulsion to obtain a water-based acrylic acid hybrid epoxy emulsion.

[0043] First, the water-based acrylic acid emulsion is prepared, specifically as follows:

[0044] The raw material ratio includes: 100 parts of deionized water, 2 parts of emulsifier, 2 parts of pH buffer, 15 parts of styrene, 50 parts of acrylic ester, 10 parts of methacrylic acid, 10 parts of emulsion stabilizer, and 1 part of initiator.

[0045] In this embodiment, the initiator is potassium persulfate; the acrylic ester is a mixture of methyl methacrylate and butyl acrylate; the emulsion stabilizer is allyl glycidyl ether, which has the characteristics of a self-emulsifier due to its hydrophilic-lipophilic property, further improving the stability of the emulsion. The emulsifier includes fatty alcohol polyoxyethylene ether (AEO), alkylphenol polyoxyethylene ether, and sodium alkyl diphenyl ether disulfonate.

[0046] The preparation method of the water-based acrylic acid emulsion specifically includes: taking 1 / 3 of 100 parts of deionized water and mixing methacrylic acid, styrene, and acrylic ester to obtain a mixed monomer; mixing the remaining deionized water with the emulsifier and the pH buffer to obtain an emulsifier solution; taking 75% of the obtained emulsifier solution and mixing the mixed monomer at 30°C, and adding the emulsion stabilizer to obtain a mixed monomer emulsion; heating the mixed monomer solution to 70°C, adding the initiator and the remaining emulsifier solution, and preparing the water-based acrylic acid emulsion.

[0047] Secondly, the latent curing thermoplastic epoxy resin mixture is prepared, specifically as follows:

[0048] The raw material ratio includes: 40 parts of bisphenol A type epoxy resin, 20 parts of bisphenol A, 20 parts of toughening agent, and a catalyst in an amount of 3% of the total amount of the bisphenol A type epoxy resin.

[0049] Among them, the bisphenol A type epoxy resin is specifically E-55, E-51, and E-44 epoxy resin, and the catalyst is triphenylphosphine. The toughening agent is neopentyl glycol diglycidyl ether and 1,4-butanediol diglycidyl ether, which functions to reduce the brittleness of the resin, increase the toughness, improve the load bearing strength, be miscible with the resin, contain active groups that can participate in the curing reaction of the resin, and improve the elongation at break and impact strength.

[0050] The preparation method of the latent curing thermoplastic epoxy resin mixture comprises the following steps: firstly, uniformly mixing the measured bisphenol A type epoxy resin and toughening agent in a reaction container, heating to 75 DEG C, adding bisphenol A, maintaining stirring at 90 DEG C for 1 hour, after the bisphenol A is completely dissolved, adding a catalyst, and stirring and dissolving for about 1 hour, and discharging to obtain the latent curing thermoplastic epoxy resin mixture.

[0051] Further, the water-based epoxy emulsion is prepared, and specifically,

[0052] The raw material ratio comprises 40 parts of the latent curing thermoplastic epoxy resin mixture, 3 parts of the emulsifier, 4 parts of the cosolvent, 40 parts of deionized water, and 1 part of the defoaming agent.

[0053] The cosolvent is ethylene glycol methyl ether or ethylene glycol ether, and the defoaming agent is a polyether siloxane copolymer.

[0054] The preparation method of the water-based epoxy emulsion comprises the following steps: adding the latent curing thermoplastic epoxy resin mixture, the emulsifier, the cosolvent, and the defoaming agent into a reaction container, heating and uniformly dissolving, dispersing by using a high-speed dispersion machine, heating at a temperature of 70 DEG C, adding 1 / 3 of 40 parts of deionized water, continuing to disperse, after the viscosity rises, adding the remaining deionized water dropwise, and completing the dropwise addition in 1 hour, and then cooling to room temperature to obtain the water-based epoxy emulsion.

[0055] Finally, the water-based epoxy emulsion and the water-based acrylic emulsion are physically mixed according to a mass ratio of 3:1 to obtain the water-based acrylic hybrid epoxy emulsion.

[0056] In step S002, the asphalt pavement milling material and the activator are added to the vibration stirring equipment, and the activated milling material is obtained after stirring.

[0057] Firstly, 50 parts of alcohol are added as a solvent into a reaction container, heated to 50 DEG C, 50 parts of stearic acid waste are added into the alcohol, and stirring is started, the rotating speed is 300 rpm / min, 40 parts of anthracene oil are added into the alcohol, and the rotating speed is maintained, an emulsifier is added, the temperature is increased to 70 DEG C, the stirring rotating speed is 1000 rpm / min, and after stirring for 30 min, the activator is obtained.

[0058] Secondly, the vibration mode of the emulsified asphalt vibration stirring regeneration vehicle is started, and the specific parameters are that the vibration amplitude is 1.26 mm, the vibration frequency is 1.18 rad / s, and the stirring rotating speed is 55 r / min.

[0059] 1000 parts of the asphalt pavement milling material and 70 parts of the activator are added into the emulsified asphalt vibration stirring regeneration vehicle for pre-mixing, and after stirring for 2 min, the activated milling material is obtained.

[0060] Step S003, after obtaining the activated milling material, continue to add water-based acrylic hybrid epoxy emulsion, curing agent and cold asphalt modifier to the vibrating stirring device, stir at room temperature after coating, and then add pure water.

[0061] First, 45 parts of No. 70 base asphalt is heated to 135℃, then 40 parts of vegetable oil is poured into the No. 70 base asphalt and stirred evenly, finally, 2 parts of anti-peeling agent and 3 parts of naphthenic acid manganese are added, and continue to stir evenly at a temperature of 60℃, and cool to room temperature to obtain a cold asphalt modifier.

[0062] In the emulsified asphalt vibrating stirring regeneration vehicle, continue to add water-based acrylic hybrid epoxy emulsion, curing agent and cold asphalt modifier, the mass ratio of water-based acrylic hybrid epoxy emulsion and curing agent is 2:1, the mass ratio of water-based acrylic hybrid epoxy emulsion and asphalt pavement milling material is 20:1, the mass ratio of cold asphalt modifier and asphalt pavement milling material is 100:1.5, and stir for 2 minutes at room temperature for coating.

[0063] Finally, add pure water to the emulsified asphalt vibrating stirring regeneration vehicle, the amount of pure water added is 2% of the total mixture in the emulsified asphalt vibrating stirring regeneration vehicle, trigger the curing reaction of the cold patch agent, and control the stirring time to be 2 minutes.

[0064] Among them, the particle size of the asphalt pavement milling material is ≤8mm, the curing agent is a polyamide curing agent, the pure water is specifically clean water with calcium oxide content not exceeding 80mg per liter of water, and the cold asphalt modifier is specifically a water-reactive cold patch agent that promotes curing and improves initial strength and durability when reacting with water.

[0065] Among them, the purpose of adding the activator is to restore the activity of aged asphalt and enhance the compatibility with new materials, and the purpose of adding the water-based acrylic hybrid epoxy emulsion and the curing agent is to introduce the film-forming property and gloss of acrylic acid, and the adhesion and corrosion resistance of epoxy resin, to ensure that the cured environment-friendly asphalt material has both acrylic weather resistance and epoxy resin mechanical strength.

[0066] However, during the curing reaction after adding pure water in the above emulsified asphalt vibrating stirring regeneration vehicle, the porosity and aging degree of the asphalt pavement milling material (RAP) are different, and the single water addition mode of the emulsified asphalt vibrating stirring regeneration vehicle is difficult to adapt to the water content fluctuation of the asphalt pavement milling material (RAP) and the change of environmental temperature and humidity, which directly affects the curing process and effect of the asphalt mixture.

[0067] Based on the above analysis, the following processing is made:

[0068] (1) During the preset time period after adding pure water, the torque of the vibrating stirring device at each time and the temperature of the asphalt mixture stirred at each time are collected.

[0069] The total material after adding pure water in the emulsified asphalt vibrating mixing regeneration vehicle is recorded as asphalt mixture. In order to monitor the fluidity of the asphalt mixture during the vibrating mixing process, a dynamic torque sensor is installed on the mixing shaft of the emulsified asphalt vibrating mixing regeneration vehicle to obtain the torque value at each time during the vibrating mixing process. In order to monitor the temperature of the asphalt mixture during the vibrating mixing process, a PT100 temperature sensor is installed in the emulsified asphalt vibrating mixing regeneration vehicle to obtain the temperature value of the asphalt mixture at each time. The torque value and the temperature value are synchronously collected, and the sampling frequency of the torque sensor and the temperature sensor is 10 Hz, which can be set by the implementer according to the actual situation, and the present embodiment does not limit this.

[0070] In the present embodiment, all torque values and temperature values within 1 min after adding pure water in the emulsified asphalt vibrating mixing regeneration vehicle are obtained, and the torque data sequence and the temperature data sequence are composed in ascending order of time. The 1 min after adding pure water is the preset time period of the present embodiment, and the length of the preset time period can be set by the implementer according to the actual situation, and the present embodiment does not limit this.

[0071] (2) The mutation degree of the temperature at each time and the proportion of the time when the temperature mutates are analyzed to determine the temperature sudden rising strength of the asphalt mixture. Combined with the linear change trend of the temperature of the asphalt mixture, the local uneven coating evaluation value of the asphalt mixture is obtained.

[0072] In the preparation process of the environment-friendly asphalt material, an appropriate amount of pure water is added to activate the resin and curing agent in the asphalt mixture, promote the molecular chains of the resin and the curing agent to cross-link with each other, form a stable network structure, accelerate the curing reaction process, and improve the strength and durability of the asphalt mixture. However, if the pure water is added excessively, the curing reaction is accelerated, a large amount of heat is released, and the short-time temperature suddenly rises.

[0073] In the present embodiment, the temperature data sequence of the asphalt mixture is obtained, the temperature data sequence is taken as the input of the moving average method, the temperature data sequence is smoothed, and the sequence output by the moving average method is taken as the first temperature sequence reflecting the overall change trend of the temperature of the asphalt mixture. The difference between the temperature data in the same order of the temperature data sequence and the first temperature sequence is calculated, which is recorded as the second temperature sequence, reflecting the temperature deviation of the short-time temperature of the asphalt mixture from the overall trend. The time when all elements in the second temperature sequence are greater than the preset temperature difference threshold Th is recorded as the sudden rising time. The greater the temperature difference threshold, the higher the tolerance error of the short-time temperature deviation of the asphalt mixture. The value range of the temperature difference threshold is set to [3, 10], and the temperature difference threshold Th in the present embodiment is 5°C.

[0074] In the present embodiment, the temperature sudden rising strength of the asphalt mixture is calculated by the following formula:

[0075] wherein, is the temperature jump strength of the asphalt mixture, is the element value of the c-th jump moment in the second temperature sequence, is the total number of jump moments in the second temperature sequence, is the proportion of the jump moment in all moments in the second temperature sequence, is a preset temperature difference threshold.

[0076] is used to reflect the short-time temperature jump of the asphalt mixture in the emulsified asphalt vibration mixing regeneration vehicle, is used to reflect the frequency of the temperature jump phenomenon of the asphalt mixture in the resonance mixing process. The higher the frequency, the more the short-time temperature rises, and the greater the temperature jump strength Q.

[0077] The high-frequency vibration in the emulsified asphalt vibration mixing regeneration vehicle can greatly improve the uniformity of the coated activation milling material and the water-based acrylic acid hybrid epoxy emulsion. If the amount of pure water added is too much, the curing reaction will proceed violently in a short time, which can easily lead to uneven stress and pores in the asphalt mixture in a short time, destroy the coating relationship between the emulsion particles and the milling material, and cause local uneven coating. The emulsified asphalt vibration mixing regeneration vehicle has a large volume, and the dynamic torque sensor on the stirring shaft has weak ability to capture the characteristics of local uneven coating, but local uneven coating can easily cause short-time temperature changes of the asphalt mixture, causing overall trend changes.

[0078] In this embodiment, the first temperature sequence of the asphalt mixture is obtained, and the first temperature sequence is taken as the input of the linear fitting algorithm to obtain the fitting straight line of the first temperature sequence. In this embodiment, the least square method is used as the linear fitting algorithm. In this embodiment, the difference between the fitting value of the temperature at each moment in the first temperature sequence on the fitting straight line and the true temperature value in the first temperature sequence is calculated as the fitting error at each moment, the mean value of the fitting errors of all moments in the first temperature sequence is calculated, and the fusion result of the mean value and the temperature jump strength is taken as the local uneven coating evaluation value of the asphalt mixture.

[0079] It should be noted that fusion means combining multiple variables, which can be calculated by addition, multiplication, addition-multiplication mixing, etc. In this embodiment, the product of the mean value and the temperature jump strength is taken as the local uneven coating evaluation value of the asphalt mixture.

[0080] The mean value reflects the degree of change in the overall trend of the temperature of the asphalt mixture, and the temperature rise intensity reflects the short-term temperature rise characteristics of the asphalt mixture during the resonant mixing process. The higher the degree of change in the overall temperature trend of the asphalt mixture on the local part and the stronger the disorder, and the more significant the short-term temperature rise characteristics, the worse the uniformity of the temperature change characteristics of each region of the asphalt mixture, and the more likely the existence of uneven stress and pores in the asphalt mixture, resulting in uneven local coating, and the greater the local coating unevenness evaluation value.

[0081] (3) Determine the viscosity evaluation coefficient of the asphalt mixture by the difference between the trend characteristics of the torque at each time and the trend characteristics of the torque of the standard asphalt material during preparation.

[0082] In the preparation process of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material, the water-based acrylic hybrid epoxy emulsion and the curing agent undergo a curing reaction, causing the irreversible change process of the thermosetting resin. The water-reactive cold patching agent is added to improve the curing reaction activity, so that the asphalt mixture can be cured quickly at room temperature or low temperature, solving the limitation of curing under high temperature conditions. As the curing reaction of the asphalt mixture proceeds, the viscosity of the reaction system continuously increases, and the intermolecular force is enhanced, which will cause the flowability of the asphalt mixture to weaken and increase the mixing resistance of the asphalt mixture.

[0083] The cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material obtained in the historical preparation process, which meets the design standard in performance and has no white material in appearance, is used as a standard asphalt material. The torque data sequence of the standard asphalt material in the preparation process after adding pure water is also obtained as a standard torque data sequence, reflecting the standard mixing resistance feedback condition of the standard asphalt material in the preparation process.

[0084] In this embodiment, the STL (Seasonal and Trend decomposition using Loess) time series decomposition algorithm is used to obtain the trend items of each torque value in the torque data sequence of the asphalt mixture and the standard torque data sequence of the standard asphalt material. Sen's slope estimation method is used to obtain the slope value of the trend items of all torques in the torque data sequence of the asphalt mixture, which is denoted as the first slope. Similarly, Sen's slope estimation method is used to obtain the slope value of the trend items of all torques in the standard torque data sequence of the standard asphalt material, which is denoted as the second slope. The STL time series decomposition algorithm and Sen's slope estimation method are both known technologies, and the specific process is not described in detail.

[0085] The viscosity evaluation coefficient of the asphalt mixture is determined by the difference between the first slope and the second slope.

[0086] It should be noted that the difference represents the difference between the two variables, which can be calculated by absolute value, square value, ratio value, etc. In this embodiment, the ratio of the first slope to the second slope is used as the viscosity evaluation coefficient of the asphalt mixture.

[0087] The greater the actual stirring resistance feedback force is than the standard stirring resistance feedback condition, that is, the greater the ratio of the first slope to the second slope, the greater the stirring resistance of the asphalt mixture, the worse the flowability and the stronger the viscosity of the asphalt mixture, and the greater the viscosity evaluation coefficient. In order to successfully carry out the cold paving process of the water-based acrylic hybrid epoxy environmentally friendly asphalt material, it is necessary to ensure that the asphalt mixture has a certain viscosity without excessive solidification of the asphalt mixture. The closer the viscosity evaluation coefficient is to the constant 1, the better the construction and workability and product quality, and the production of materials that meet the design standards.

[0088] (4) Using the local coating unevenness evaluation value and the viscosity evaluation coefficient, the solidification reaction in the vibrating mixing device is regulated to obtain the prepared asphalt material.

[0089] In this embodiment, the results of normalizing the local coating unevenness evaluation value and the viscosity evaluation coefficient of the asphalt mixture are combined to form a solidification feature vector of the asphalt mixture. The higher the local coating unevenness evaluation value, the faster the molecular chains of the resin and the curing agent crosslink with each other, resulting in a sudden rise in the local temperature of the asphalt mixture. Under the interference of the water content fluctuation of the asphalt pavement milling material (RAP) and the change of the environmental temperature and humidity, the curing reaction may not be uniformly carried out due to the excessive addition of pure water. The higher the viscosity evaluation coefficient, the weaker the flowability of the asphalt mixture. Under the interference of the water content fluctuation of the asphalt pavement milling material (RAP) and the change of the environmental temperature and humidity, the curing reaction process may be faster due to the excessive addition of pure water.

[0090] The curing characteristic vector of the preparation of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material in the historical N times is obtained, wherein there are asphalt material preparation processes of excessive curing, insufficient curing and appropriate curing. Therefore, the curing characteristic vector of the preparation of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material in the historical N times is taken as the training data, the excessive curing, insufficient curing and appropriate curing are taken as the training labels, a training set is constructed in this way, a Support Vector Machines (SVM) linear classifier is used for classification training, a Hinge loss is used as the loss function, and a stochastic gradient descent (SGD) is used as the optimizer, so as to obtain the curing process evaluation model of the asphalt mixture. N is the data sample number of the training set, N = 50 in the embodiment, and the implementer can set it according to the actual situation, which is not limited in the embodiment. The SVM classifier is a known technology, and the implementer can select other feasible classification models, which is not limited in the embodiment.

[0091] The curing characteristic vector of the preparation of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material in the historical N times is obtained, wherein there are asphalt material preparation processes of excessive curing, insufficient curing and appropriate curing. Therefore, the curing characteristic vector of the preparation of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material in the historical N times is taken as the training data, the excessive curing, insufficient curing and appropriate curing are taken as the training labels, a training set is constructed in this way, a Support Vector Machines (SVM) linear classifier is used for classification training, a Hinge loss is used as the loss function, and a stochastic gradient descent (SGD) is used as the optimizer, so as to obtain the curing process evaluation model of the asphalt mixture. N is the data sample number of the training set, N = 50 in the embodiment, and the implementer can set it according to the actual situation, which is not limited in the embodiment. The SVM classifier is a known technology, and the implementer can select other feasible classification models, which is not limited in the embodiment.

[0092] If the classification result of the curing characteristic vector of the asphalt mixture is excessive curing, the amount of pure water added may be too much. In order to prevent the curing reaction rate from being out of control, the asphalt mixture is hardened too early, the temperature rises too high, the asphalt material is pyrolyzed, and the asphalt is aged. In the embodiment, 0.1% of the water reducing agent of the total mass of the asphalt mixture is put into the emulsified asphalt vibrating mixer regenerating vehicle, which is used to reduce the gap between uneven coating, make the internal structure of the asphalt material more dense, and enhance the cold-paving strength and compactness of the asphalt material. The water reducing agent is calcium lignosulfonate water reducing agent.

[0093] If the classification result of the curing characteristic vector of the asphalt mixture is insufficient curing, the amount of pure water added may be too little. In order to prevent the curing reaction from being insufficient, the pulling strength and splitting strength of the asphalt material are affected. In the embodiment, 10% of the pure water of the added pure water is put into the emulsified asphalt vibrating mixer regenerating vehicle, which improves the curing reaction activity and promotes the curing reaction process.

[0094] If the classification result of the curing characteristic vector of the asphalt mixture is appropriate curing, the emulsified asphalt vibrating mixer regenerating vehicle does not need additional treatment. The curing reaction control flow chart of the asphalt mixture is shown in Figure 2

[0095] The curing control of the asphalt mixture is completed, and after 2 minutes of stirring from the first addition of pure water in the emulsified asphalt vibrating mixer regenerating vehicle, the stirring is stopped, and the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material prepared in the embodiment is obtained. ​

[0096] Embodiment 2

[0097] Referring to Figure 1 which shows a step flow chart of a preparation process of a cold-mixed and cold-paved water-based acrylic acid hybrid epoxy environmentally friendly asphalt material provided by Embodiment 2 of the present application, the process comprises:

[0098] In step S001, the water-based acrylic acid emulsion is physically mixed with the water-based epoxy emulsion to obtain a water-based acrylic acid hybrid epoxy emulsion.

[0099] First, the water-based acrylic acid emulsion is prepared, specifically as follows:

[0100] The raw material ratio includes: 100 parts of deionized water, 4 parts of emulsifier, 3 parts of pH buffer, 20 parts of styrene, 70 parts of acrylic ester, 15 parts of methyl methacrylate, 13 parts of emulsion stabilizer, and 3 parts of initiator.

[0101] In this embodiment, the initiator is potassium persulfate and ammonium persulfate; the acrylic ester is a mixture of methyl methacrylate and butyl acrylate; and the emulsion stabilizer is allyl glycidyl ether.

[0102] The preparation method of the water-based acrylic acid emulsion specifically includes: taking 1 / 3 of 100 parts of deionized water and mixing methyl methacrylate, styrene, and acrylic ester to obtain a mixed monomer; mixing the remaining deionized water with the emulsifier and the pH buffer to obtain an emulsifier solution; mixing 80% of the obtained emulsifier solution with the mixed monomer at 50°C and adding the emulsion stabilizer to obtain a mixed monomer emulsion; heating the mixed monomer solution to 80°C, adding the initiator and the remaining emulsifier solution, and preparing the water-based acrylic acid emulsion.

[0103] Second, the latent curing thermoplastic epoxy resin mixture is prepared, specifically as follows:

[0104] The raw material ratio includes: 50 parts of bisphenol A type epoxy resin, 30 parts of bisphenol A, 25 parts of toughening agent, and a catalyst in an amount of 4% of the total amount of the bisphenol A type epoxy resin.

[0105] The bisphenol A type epoxy resin is specifically E-55, E-51, and E-20 epoxy resin, and the catalyst is methyl triphenyl phosphonium bromide. The toughening agent is neopentyl glycol diglycidyl ether and 1,6-hexanediol diglycidyl ether.

[0106] The preparation method of the latent curing thermoplastic epoxy resin mixture includes: first, uniformly mixing the measured bisphenol A type epoxy resin and the toughening agent in a reaction container, heating to 80°C, adding bisphenol A, stirring at 95°C for 1 hour, adding the catalyst after the bisphenol A is completely dissolved, stirring and dissolving for about 1 hour, and discharging to obtain the latent curing thermoplastic epoxy resin mixture.

[0107] Further, the water-based epoxy emulsion is prepared, specifically:

[0108] The raw material ratio includes: 45 parts of latent curing thermoplastic epoxy resin mixture, 4 parts of emulsifier, 4 parts of cosolvent, 45 parts of deionized water, and 3 parts of defoamer.

[0109] The cosolvent is propylene glycol methyl ether or propylene glycol ethyl ether, and the defoamer is polyether siloxane copolymer.

[0110] The preparation method of the water-based epoxy emulsion is as follows: the latent curing thermoplastic epoxy resin mixture, the emulsifier, the cosolvent, and the defoamer are added to a reaction container and heated to dissolve uniformly, a high-speed dispersing machine is used for dispersion, the heating temperature is 80°C, 1 / 3 of 45 parts of deionized water is added, dispersion is continued, after the viscosity rises, the remaining deionized water is added dropwise, and it is added dropwise for 1 hour, then it is cooled to room temperature, and the water-based epoxy emulsion is obtained.

[0111] Finally, the water-based epoxy emulsion and the water-based acrylic emulsion are physically mixed in a mass ratio of 4:1 to obtain the water-based acrylic hybrid epoxy emulsion.

[0112] Step S002, add asphalt pavement milling material and activator to the vibrating stirring equipment, and obtain activated milling material after stirring.

[0113] Firstly, 90 parts of alcohol are put into the reaction container as a solvent, heated to 55°C, 55 parts of stearic acid waste are added into the alcohol, and stirring is started with a speed of 400 rp / min, then 45 parts of anthracene oil are added into the alcohol, and the stirring speed is maintained, an emulsifier is added, the temperature is raised to 75°C, the stirring speed is 1300 rp / min, and after stirring for 30 min, the activator is obtained.

[0114] Secondly, start the vibration mode in the emulsified asphalt vibrating stirring regeneration vehicle, and the specific parameters are that the vibration amplitude is 1.26 mm, the vibration frequency is 1.18 rad / s, and the stirring speed is 55 r / min.

[0115] Put 1300 parts of asphalt pavement milling material and 85 parts of activator into the emulsified asphalt vibrating stirring regeneration vehicle for pre-mixing, stir for 4 minutes, and obtain the activated milling material.

[0116] Step S003, after obtaining the activated milling material, continue to add the water-based acrylic hybrid epoxy emulsion, the curing agent, and the cold-mixed asphalt modifier to the vibrating stirring equipment, and add pure water after stirring and coating at room temperature.

[0117] Firstly, 50 parts of No. 70 base asphalt are heated to 138°C, then 45 parts of vegetable oil are poured into the No. 70 base asphalt and stirred uniformly, finally, 2 parts of anti-stripping agent and 4 parts of naphthenic acid manganese are added, and continue to stir uniformly at a temperature of 65°C, and cool to room temperature to obtain the cold-mixed asphalt modifier.

[0118] In the emulsified asphalt vibration stirring regeneration vehicle, continue to add water-based acrylic hybrid epoxy emulsion, curing agent and cold-mixed asphalt modifier, the mass ratio of water-based acrylic hybrid epoxy emulsion and curing agent is 2:1, the mass ratio of water-based acrylic hybrid epoxy emulsion and asphalt pavement milling material is 20:1, the mass ratio of cold-mixed asphalt modifier and asphalt pavement milling material is 100:2, and stirring is carried out at room temperature for 4 minutes.

[0119] Finally, pure water is added to the emulsified asphalt vibration stirring regeneration vehicle, the amount of pure water is 2% of the total mixture mass in the emulsified asphalt vibration stirring regeneration vehicle, the curing reaction of the cold patch agent is triggered, and the stirring time is controlled to be 2 minutes.

[0120] Among them, the particle size of the asphalt pavement milling material is ≤8mm, the curing agent is a polyamide curing agent, the pure water is specifically clean water with the content of calcium oxide in each liter of water not exceeding 80mg, and the cold-mixed asphalt modifier is a water-reactive cold patch agent which promotes curing and improves initial strength and durability by reacting with water.

[0121] After adding pure water to the emulsified asphalt vibration stirring regeneration vehicle, the curing reaction of the asphalt mixture is controlled according to the same steps and methods as in Example 1, and after stirring is completed, the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material prepared in this example is obtained.

[0122] Example 3

[0123] Please refer to Figure 1 which shows a step flow chart of a cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material preparation process provided by Example 3 of the present application, and the process includes:

[0124] Step S001, physically mix the water-based acrylic emulsion and the water-based epoxy emulsion to obtain a water-based acrylic hybrid epoxy emulsion.

[0125] First, prepare the water-based acrylic emulsion, specifically:

[0126] The raw material ratio includes: deionized water 100 parts, emulsifier 5 parts, pH buffer 4 parts, styrene 25 parts, acrylic ester 80 parts, methyl methacrylate 20 parts, emulsion stabilizer 15 parts, and initiator 4 parts.

[0127] Among them, the initiator in this example is ammonium persulfate; the acrylic ester is a mixture of methyl methacrylate and butyl acrylate; and the emulsion stabilizer is allyl glycidyl ether.

[0128] The preparation method of the water-based acrylic emulsion specifically comprises the following steps: 1 / 3 of 100 parts of deionized water is taken and mixed with methyl methacrylate, styrene and acrylate to obtain a mixed monomer; the remaining deionized water is taken and mixed with an emulsifier and a pH buffer to obtain an emulsifier solution; 85% of the obtained emulsifier solution is taken and mixed with the mixed monomer at 60 DEG C, and an emulsion stabilizer is added to obtain a mixed monomer emulsion; the mixed monomer solution is heated to 90 DEG C, an initiator and the remaining emulsifier solution are added, and a water-based acrylic emulsion is prepared.

[0129] Secondly, the latent curing thermoplastic epoxy resin mixture is prepared, specifically as follows:

[0130] The raw material ratio comprises 60 parts of bisphenol A type epoxy resin, 40 parts of bisphenol A, 30 parts of toughening agent, and a catalyst in an amount of 5% of the total amount of bisphenol A type epoxy resin.

[0131] The bisphenol A type epoxy resin is specifically E-55, E-51, E-44, E-20 epoxy resin, the catalyst is triphenylphosphine, methyltriphenylphosphonium bromide, and the toughening agent is neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether, 1, 6-hexanediol diglycidyl ether.

[0132] The preparation method of the latent curing thermoplastic epoxy resin mixture comprises the following steps: first, the measured bisphenol A type epoxy resin and toughening agent are uniformly mixed in a reaction container, heated to 85 DEG C, and then bisphenol A is added and stirred at 100 DEG C for 1 hour; after the bisphenol A is completely dissolved, the catalyst is added, and stirring and dissolution are maintained for about 1 hour; the latent curing thermoplastic epoxy resin mixture is obtained.

[0133] Further, the water-based epoxy emulsion is prepared, specifically as follows:

[0134] The raw material ratio comprises 50 parts of the latent curing thermoplastic epoxy resin mixture, 5 parts of an emulsifier, 5 parts of a cosolvent, 50 parts of deionized water, and 5 parts of a defoaming agent.

[0135] The cosolvent is ethylene glycol methyl ether, ethylene glycol ethyl ether, propylene glycol methyl ether, and propylene glycol ethyl ether, and the defoaming agent is a polyether siloxane copolymer.

[0136] The preparation method of the water-based epoxy emulsion specifically comprises the following steps: the latent curing thermoplastic epoxy resin mixture, the emulsifier, the cosolvent and the defoaming agent are put into a reaction container and heated to be uniformly dissolved, a high-speed dispersion machine is used for dispersion, the heating temperature is 90 DEG C, 1 / 3 of 50 parts of deionized water is added, and continuous dispersion is carried out; after the viscosity rises, the remaining deionized water is added dropwise, and the dropping is completed in 1 hour; then the water-based epoxy emulsion is cooled to room temperature.

[0137] Finally, the water-based epoxy emulsion and the water-based acrylic emulsion are physically mixed in a mass ratio of 5:1 to obtain a water-based acrylic hybrid epoxy emulsion.

[0138] Step S002, add asphalt pavement milling material and activator to the vibrating stirring device, and obtain activated milling material after stirring.

[0139] Firstly, 120 parts of alcohol as a solvent were put into the reaction container and heated to 60℃, 60 parts of stearic acid waste were added into the alcohol, and the stirring was started with a speed of 500 rp / min, then 50 parts of anthracene oil were added into the alcohol and the stirring speed was maintained, an emulsifier was added, the temperature was raised to 80℃, and the stirring speed was 1500 rp / min, after stirring for 30 min, the activator was obtained.

[0140] Secondly, the vibration mode was started in the emulsified asphalt vibrating stirring regeneration vehicle, and the specific parameters were vibration amplitude of 1.26 mm, vibration frequency of 1.18 rad / s, and stirring speed of 55 r / min.

[0141] 1500 parts of asphalt pavement milling material and 100 parts of activator were put into the emulsified asphalt vibrating stirring regeneration vehicle and uniformly pre-mixed, and after stirring for 5 minutes, the activated milling material was obtained.

[0142] Step S003, after obtaining the activated milling material, waterborne acrylic hybrid epoxy emulsion, curing agent and cold-mixed asphalt modifier were continuously added to the vibrating stirring device, and pure water was added after normal temperature stirring and coating.

[0143] Firstly, 55 parts of No. 70 base asphalt were heated to 140℃, then 50 parts of vegetable oil were poured into the No. 70 base asphalt and stirred uniformly, finally, 3 parts of anti-stripping agent and 5 parts of naphthenic acid manganese were added, and the stirring was continued at a temperature of 70℃ until uniform, and then cooled to room temperature to obtain the cold-mixed asphalt modifier.

[0144] In the emulsified asphalt vibrating stirring regeneration vehicle, waterborne acrylic hybrid epoxy emulsion, curing agent and cold-mixed asphalt modifier were continuously added, the mass ratio of waterborne acrylic hybrid epoxy emulsion and curing agent was 2:1, the mass ratio of waterborne acrylic hybrid epoxy emulsion and asphalt pavement milling material was 20:1, and the mass ratio of cold-mixed asphalt modifier and asphalt pavement milling material was 100:2.5, and the stirring was carried out at room temperature for 5 minutes for coating.

[0145] Finally, pure water was added to the emulsified asphalt vibrating stirring regeneration vehicle, the amount of pure water added was 2% of the total mixture mass in the emulsified asphalt vibrating stirring regeneration vehicle, the curing reaction of the cold patch agent was triggered, and the stirring time was controlled for 2 minutes.

[0146] Among them, the particle size of the asphalt pavement milling material is ≤8 mm, the curing agent is a polyamide curing agent, the pure water is clean water with calcium oxide content not exceeding 80 mg per liter of water, and the cold-mixed asphalt modifier is a water-reactive cold patch agent that promotes curing, improves initial strength and durability when reacting with water.

[0147] After adding pure water into the emulsified asphalt vibration stirring regeneration vehicle, the solidification reaction of the asphalt mixture is controlled according to the same steps and methods as in Example 1 of the present application. After stirring, the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material prepared in this example is obtained.

[0148] In addition, the present application also discloses a construction method of the cold-mixed and cold-paved water-based acrylic hybrid epoxy environmentally friendly asphalt material, specifically comprising the following steps:

[0149] Construction environment: the construction environment requires that the ambient temperature is not lower than 10℃ and not higher than 35℃, and the humidity is not higher than 85%; the loose waste slag on the cold regeneration asphalt pavement is removed and the edge is cut to a solid surface, so that the base is ensured to have no cracks and delamination, and the epoxy permeable primer needs to be sprayed on the smooth or thin base surface;

[0150] Spreading and leveling: the water-based acrylic hybrid epoxy environmentally friendly asphalt material is cold-paved to a thickness of 3-10 cm by manual or mechanical operation, and is initially leveled by using a straight ruler, the joint is treated, and the flatness of the cold-paved material is detected by using a 3 m straight ruler, and the error is required to be ≤3 mm;

[0151] Compaction: the compaction process is divided into three stages of initial compaction, recompaction and final compaction, and the vibration flat compactor is used for layer compaction, the initial compaction is performed by 2-3 times of front static and rear vibration of a double steel roller compactor, the recompaction is performed by 3-4 times of high-frequency and low-amplitude vibration compaction of a single steel roller compactor, the entire section is fully rolled to prevent uneven compaction of different parts, and then the rubber tire road roller is used for 4-6 times of compaction, and the final compaction is performed by 1-2 times of static compaction of the double steel roller compactor to eliminate the wheel marks. The initial compaction speed is controlled to be 1.5-3 km / h, and the recompaction and final compaction speeds are controlled to be 2-4 km / h. It is strictly forbidden to stop, add oil and add water on the newly-paved surface, and it is strictly forbidden to drop diesel oil on the already-paved regenerated asphalt base when adding oil.

[0152] Maintenance: a two-component transparent sealing agent (coating agent) is sprayed to enhance the ultraviolet resistance and wear resistance, and the traffic is closed for ≥24 hours to avoid water accumulation.

[0153] Comparative Example 1

[0154] Comparative Example 1 adopts the same steps and parameters as Example 1 of the present application, except that after adding pure water into the emulsified asphalt vibration stirring regeneration vehicle, the solidification reaction of the asphalt mixture is not controlled, and after 2 minutes of stirring, the asphalt material prepared in Comparative Example 1 is obtained.

[0155] Comparative Example 2

[0156] Comparative Example 2 adopts the same steps and parameters as Example 2 of the present application, except that after adding pure water into the emulsified asphalt vibration stirring regeneration vehicle, the solidification reaction of the asphalt mixture is not controlled, and after 2 minutes of stirring, the asphalt material prepared in Comparative Example 2 is obtained.

[0157] Comparative Example 3

[0158] Comparative Example 3 adopts the same steps and parameters as Example 3 of the present application, except that after adding pure water into the emulsified asphalt vibration stirring regeneration vehicle, the curing reaction of the asphalt mixture is not controlled, and after 2 minutes of stirring, the asphalt material prepared in Comparative Example 3 is obtained.

[0159] The asphalt materials prepared in the examples and comparative examples of the present application are respectively tested for performance, and the test results are shown in Table 1.

[0160] Table 1 Performance comparison results of examples and comparative examples

[0161]

[0162] As can be seen from Table 1, the water-based acrylic hybrid epoxy environmentally friendly asphalt material using the curing control method of the present application effectively reduces the void ratio and improves the compactness of the environmentally friendly asphalt material. Moreover, the tensile strength and splitting strength are stronger, the environmentally friendly asphalt material has stronger bonding ability and better crack resistance, and the environmentally friendly asphalt material obtained by resonance stirring is less likely to appear white material, and the asphalt mixture is more uniform.

[0163] It should be noted that the above-mentioned order of the examples of the present application is only for description, and does not represent the advantages and disadvantages of the examples. The above describes specific embodiments of the present specification. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or can be advantageous.

[0164] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0165] The above-described examples are only used to illustrate the technical solutions of the present application, and not to limit them; modifying the technical solutions described in the above examples, or equivalently replacing some technical features, does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and all should be included in the protection scope of the present application.

Claims

1. A process for the preparation of cold-mixed and cold-laid waterborne acrylic acid hybridized epoxy eco-friendly asphalt material, characterized by, The process comprises: First, physically mix the aqueous acrylic emulsion with the aqueous epoxy emulsion to obtain an aqueous acrylic hybrid epoxy emulsion; Second, add the asphalt pavement milling material and the activator to the vibrating stirring equipment, stir to obtain the activated milling material; after obtaining the activated milling material, continue to add the aqueous acrylic hybrid epoxy emulsion, the curing agent and the cold-mixed asphalt modifier to the vibrating stirring equipment, and stir at room temperature to coat; Finally, add pure water to the vibrating stirring equipment, collect the torque of the vibrating stirring equipment at each time and the temperature of the asphalt mixture at each time within a preset time period after adding the pure water; Analyze the mutation degree of the temperature at each time and the proportion of the time when the temperature mutates to determine the temperature sudden rising strength of the asphalt mixture, and combine the linear change trend of the temperature of the asphalt mixture to obtain the local coating uneven evaluation value of the asphalt mixture; Determine the viscosity evaluation coefficient of the asphalt mixture by the difference between the trend characteristics of the torque at each time and the trend characteristics of the torque corresponding to the preparation of the standard asphalt material; Use the local coating uneven evaluation value and the viscosity evaluation coefficient to regulate the curing reaction in the vibrating stirring equipment to obtain the prepared asphalt material; The process for obtaining the activator is as follows: 90 parts of alcohol are used as a solvent and placed in a reaction container, heated to 55 DEG C, 55 parts of stearic acid waste are added to the alcohol, stirring is started with a speed of 400 rpm / min, 45 parts of anthracene oil are then added to the alcohol, and the stirring speed is maintained; an emulsifier is added, the temperature is raised to 75 DEG C, the stirring speed is 1300 rpm / min, and after stirring for 30 minutes, the activator is obtained; The curing agent is a polyamide curing agent; The process for obtaining the cold-mixed asphalt modifier is as follows: 50 parts of No. 70 base asphalt are heated to 138 DEG C, 45 parts of vegetable oil are then poured into the No. 70 base asphalt and stirred uniformly, and finally 2 parts of anti-stripping agent and 4 parts of manganese naphthenate are added, and the mixture is stirred uniformly at a temperature of 65 DEG C, and then cooled to room temperature to obtain the cold-mixed asphalt modifier; The determination of the local coating uneven evaluation value comprises: Smooth all the collected temperatures, linearly fit the smoothed temperatures at all times, calculate the mean of the fitting errors at all times, and the local coating uneven evaluation value is the fusion result of the mean and the temperature sudden rising strength; The determination of the viscosity evaluation coefficient comprises: Use the time series decomposition algorithm to obtain the trend item of the torque at each time, obtain the slope of the trend item at all times, denoted as the first slope, and correspondingly, for the trend item of the torque corresponding to the preparation of the standard asphalt material, obtain the second slope, and the ratio of the first slope to the second slope is taken as the viscosity evaluation coefficient.

2. A process for preparing a cold-mix and cold-lay waterborne hybrid epoxy asphalt material according to claim 1, characterized in that, The mass ratio of the aqueous epoxy emulsion to the aqueous acrylic emulsion during the physical mixing is 3:1-5:

1.

3. A process for preparing a cold-mix and cold-lay waterborne hybrid epoxy asphalt material according to claim 1, characterized in that, The mass ratio of the asphalt pavement milling material to the activator is 100:7-15:1, and the particle size of the asphalt pavement milling material is ≤8 mm.

4. A process for preparing a cold-mix and cold-lay waterborne hybrid epoxy asphalt material according to claim 1, characterized in that, The stirring time for obtaining the activated milling material is 2-5 minutes.

5. A process for preparing a cold-mix and cold-lay waterborne hybrid acrylic acid-epoxy environmentally friendly asphaltic material as claimed in claim 1, wherein, The mass ratio of the water-based acrylic hybrid epoxy emulsion to the curing agent is 2:1, the mass ratio of the water-based acrylic hybrid epoxy emulsion to the asphalt pavement milling material is 20:1, and the mass ratio of the cold-mixed asphalt modifier to the asphalt pavement milling material is 100:1.5-100:2.

5.

6. A process for preparing a cold-mix and cold-lay waterborne hybrid acrylic acid and epoxy environmentally friendly asphaltic material as claimed in claim 1, wherein, The duration of the normal-temperature stirring is 2-5 minutes.

7. A process for preparing a cold-mix and cold-lay waterborne hybrid acrylic acid and epoxy environmentally friendly asphaltic material as claimed in claim 1, wherein, The determination of the temperature jump strength comprises: calculating the difference between the temperature before smoothing and the temperature after smoothing at each time, and regarding the time when the difference is greater than a preset temperature threshold as a jump time; calculating the cumulative sum of the difference between the difference and the temperature threshold at all jump times, and the temperature jump strength is positively correlated with the cumulative sum and the proportion of the jump time in all times.

8. A process for preparing a cold-mix and cold-lay waterborne hybrid acrylic acid-epoxy environmentally friendly asphaltic material as claimed in claim 1, wherein, The regulation of the curing reaction in the vibrating mixing device comprises: using a machine learning algorithm to evaluate the local uneven coating evaluation value and the viscosity evaluation coefficient of the asphalt mixture as a whole, and the evaluation results include three types of over-curing, under-curing and suitable curing; when the evaluation result is over-curing, 0.1-0.3% of the total mass of the asphalt mixture is added to the vibrating mixing device as a water reducing agent; when the evaluation result is under-curing, 10-20% of the amount of pure water that has been added is added to the vibrating mixing device as pure water; when the evaluation result is suitable curing, no additional treatment is performed on the curing reaction in the vibrating mixing device.

Images