655 results about "Bitumen emulsion" patented technology

Disclosed in the present invention are a water-reactive asphalt cold patch, a preparation method therefor and a use method thereof. The water-reactive asphalt cold patch of the present invention comprises the following components in parts by mass: 1000 parts of aggregates; 50-60 parts of mineral powder, 85-150 parts of emulsified asphalt, 15-30 parts of a demulsifier, and 1-10 parts of a super absorbent resin. The preparation method for the water-reactive asphalt cold patch of the present invention comprises the following steps: 1) adding aggregates to a mixing vessel and mixing uniformly; 2) adding emulsified asphalt to the mixing vessel and mixing uniformly; 3) adding mineral powder and a demulsifier to the mixing vessel and mixing uniformly; and 4) adding a super absorbent resin to the mixing vessel and mixing uniformly. The water-reactive asphalt cold patch of the present invention has the advantages of simple storage, convenient construction, rapid early strength development, good adhesion to the original pavement, strong resistance to water damage, and eco-friendliness, and is suitable for large-scale popularization and application.

The invention relates to the field of performance testing of road engineering materials, and discloses an emulsified asphalt in-situ cold-recycled mixture high-temperature creep test method which comprises the following steps: preparing a test piece: presetting an old material-emulsified asphalt standard test piece, and embedding a moisture regulation and control device to generate a controllable gradient; multi-field loading: coupling an unsteady-state temperature field, a moisture gradient field and a time-varying attenuation stress field to construct a composite loading environment; synchronously aligning data: synchronously acquiring macro strain and micropore data, and realizing cross-scale alignment through a space-time matrix; performing parameter inversion: inverting nonlinear constitutive parameters by combining macro and micro data, and constraining a solution space by using a thermodynamic equation; and intelligent termination output: triggering a termination mechanism based on a multi-dimensional criterion and outputting damage evolution data. Through multi-field coupling loading, cross-scale data fusion and intelligent criterion cooperation, the problems of traditional test environment distortion, parameter deviation and criterion lag are solved, and accurate analysis of the high-temperature creep behavior of the emulsified asphalt reclaimed material and reliable prediction of the performance degradation law are achieved.

The invention discloses a waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention belongs to the technical field of asphalt pavement repairing, and particularly relates to a local repairing technology of an asphalt pavement, which comprises the following specific contents: detecting a disease range by adopting ground three-dimensional laser scanning or ground penetrating radar, determining a repairing boundary, sampling and detecting the aging degree, the moisture content and the grading type of the asphalt of the original pavement, and determining the repairing quality of the asphalt pavement. According to the method, the bonding strength of the repairing material and the asphalt layer of the original pavement is enhanced by heating and activating the interface of the original pavement and emulsifying the asphalt bonding layer, and matching the repairing material with the shrinkage coefficient of the original pavement and reinforcing and compacting the edge, so that the condition that the repaired position is cracked, loosened and damaged in a short time is avoided; warm-mixed asphalt is adopted, the heating temperature is reduced by 40-60 DEG C, cold-mixed emulsified asphalt is popularized, and the asphalt does not need to be heated, so that release of a large amount of volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs) and dust is effectively avoided, and air pollution is avoided.

The invention discloses a cold-mixed and cold-laid ultrathin overlay asphalt mixture which is prepared from the following raw materials in parts by weight: 8-15 parts of rubber powder composite emulsified asphalt; 80 to 90 parts of aggregate; 0.3 to 0.5 part of polymer fiber; 0.5 to 1 part of an interface coupling agent; the invention also provides a construction process of the cold-mixed and cold-laid ultrathin overlay asphalt mixture. The rubber powder composite emulsified asphalt is obtained by emulsifying the composite modified asphalt prepared from the ground rubber powder of the waste tires and the SBS rubber, so that the performance index of the emulsified asphalt is greatly improved, and the bonding performance of a cold-mixed thin-layer asphalt mixture and an original pavement is ensured; in addition, by adding the polymer fibers, the structural strength and the crack resistance of the ultrathin overlay can be remarkably improved. The invention can significantly reduce energy consumption and environmental pollution, and has the advantages of noise reduction, environmental protection, low cost and the like.

The invention discloses a solid waste-based cold-mixed asphalt mixture for preventive maintenance as well as a preparation method and application thereof, and belongs to the technical field of road engineering. The solid waste-based cold-mixed asphalt mixture is prepared from the following components in percentage by mass: 4.7 to 8.6 percent of modified cold-mixed asphalt adhesive, 85.8 to 93.9 percent of aggregate and 1.4 to 5.6 percent of composite filler, the modified cold-mixed asphalt adhesive is prepared from the following components in parts by weight: 86 to 96 parts of emulsified asphalt, 1 to 5 parts of bisphenol A type waterborne epoxy resin emulsion, 0.05 to 1 part of curing agent, 0.01 to 0.05 part of defoaming agent, 1.5 to 8 parts of waterborne polyurethane emulsion and 1 to 3 parts of hydroxypropyl methyl cellulose. The solid-waste-based cold-mixed asphalt mixture prepared by the method shows excellent comprehensive performance in high-temperature rut resistance, water damage resistance, freeze-thaw resistance, skid resistance, volume stability, interlayer shear resistance and the like, promotes reasonable utilization of solid waste resources, and has good economic and environmental benefits.

The invention provides a two-component permeable super-viscous anti-freezing coating and a construction process and equipment. The two-component permeable super-viscous anti-freezing coating comprises a component A, namely a high-permeability super-viscous anti-freezing coating consolidation material (anti-freezing component), and a component B, namely a high-permeability super-viscous anti-freezing coating carrier anti-skid material (carrier component). By utilizing special equipment, an anti-freezing material, emery, a penetrating agent, an adhesive, modified emulsified asphalt and the like are uniformly mixed and spread on an asphalt pavement of a road, and the double-component permeable super-viscous anti-freezing coating has the effects of melting ice and snow, pre-maintaining the pavement, filling tiny cracks and surface gaps, preventing water, inhibiting looseness and the like; the emery can increase the roughness degree of the road surface and play roles in increasing the friction coefficient of the road surface and ensuring the driving safety, so that the anti-skid performance of the road surface is improved, the damage of water, ice, snow and the like is avoided, and the purposes of protecting the structure of the road surface and prolonging the service life of the road surface are achieved; the method is an economical, effective, convenient and fast preventive maintenance measure.

The invention provides a three-order angular distance extraction-based emulsified asphalt polymer distribution uniformity evaluation method, which comprises the following steps of: acquiring a fluorescent microphotograph of an emulsified asphalt polymer modified sample, carrying out RGB three-channel separation, constructing a joint probability matrix with a gray vector on polar coordinates, and simultaneously carrying out normalization processing; and further calculating a first-order angular moment, a second-order angular moment and a third-order angular moment of the fluorescent microscopic image of the emulsified asphalt polymer modified sample according to the joint probability matrix of the gray vector, and evaluating the distribution uniformity of the polymer in the emulsified asphalt matrix. The method can accurately quantify the distribution uniformity of the polymer in the emulsified asphalt, is small in test sampling amount and high in test speed, can be widely applied to quality detection of the emulsified asphalt in road engineering construction and maintenance, and provides an effective technical means for improving the modification effect of the polymer of the emulsified asphalt and guiding optimization of a preparation process of the emulsified asphalt.

The present invention discloses an emulsified asphalt storage stability analysis method and system, the method comprising: judging whether a first diameter difference between a first layer average particle diameter and a second layer average particle diameter is greater than a preset threshold value; if greater than the preset threshold value, selecting a target first layer average particle diameter from other first layer average particle diameters according to a preset selection strategy; subtracting a target second layer average particle diameter corresponding to the target first layer average particle diameter from a second layer average particle diameter to obtain a second diameter difference, and judging whether the second diameter difference is greater than a preset threshold value; assigning weights to the first stability result and the second stability result according to a first ratio of the first diameter difference to the target difference and a second ratio of the second diameter difference to the target difference. The first stability result can be corrected, thereby improving the authenticity of the emulsified asphalt stability determination in a storage tank as much as possible.

The invention relates to the technical field of bridge pavement, in particular to a concrete bridge anti-crack bridge deck pavement structure and a pavement method. A high-elasticity modified asphalt mastic macadam concrete upper surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a fiber high-strength dense water asphalt concrete lower surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a high-toughness asphalt sand stress absorbing layer, a fiber waterborne epoxy anti-cracking waterproof bonding layer and a C50 fiber concrete anti-freezing and anti-cracking layer are sequentially arranged from top to bottom. The durability of the bridge deck pavement structure is improved, and the problem that the service life of the bridge deck pavement structure is short is solved.

The invention discloses flow-state solidified soil based on a waterproof consolidation agent and a preparation method thereof, and relates to the technical field of flow-state solidified soil, the flow-state solidified soil comprises original soil, the waterproof consolidation agent and water; the waterproof consolidation agent comprises a powder consolidation agent and a liquid consolidation agent; the liquid consolidation agent comprises emulsified silicone oil and emulsified asphalt. The powder component and the liquid component serve as the two-component consolidation agent, cement, slag, fly ash and other components in the powder consolidation agent can form a matrix structure in solidified soil, the stability of the solidified soil is improved, the compression resistance and shear strength of the solidified soil are enhanced, and the overall bearing capacity and stability of the solidified soil are improved; the liquid consolidation agent adsorbs the original soil and the powder consolidation agent to form a three-dimensional space framework, connection among soil particles is enhanced, the overall strength of the soil is improved, the compressive strength and the water stability of the solidified soil are better, and then the anti-freezing capacity of the solidified soil is improved.

The invention relates to the technical field of building construction, in particular to an emulsified asphalt mixture paving device which comprises a moving mechanism. The device further comprises a paving mechanism and a conveying mechanism, and the paving mechanism and the conveying mechanism are both installed on the moving mechanism. The conveying mechanism is used for conveying an emulsified asphalt mixture, and the paving mechanism is used for paving the emulsified asphalt mixture; the positions of the conveying mechanism and the paving mechanism are adjusted through the moving mechanism, so that the conveying mechanism discharges an emulsified asphalt mixture to the top of a tunnel, and meanwhile, the emulsified asphalt mixture is uniformly paved on the top of the tunnel through the paving mechanism, so that the practicability of the equipment is improved.

The invention discloses a method for determining the demulsification speed of emulsified asphalt, and relates to the technical field of online detection and intelligent monitoring of road engineering materials, and by integrating a lightweight time sequence prediction model and a self-adaptive processing mechanism, the practicability and reliability of the determination of the demulsification speed of the emulsified asphalt are remarkably improved; in the aspect of portability, an edge model based on a gating circulation unit structure is adopted, so that the dependence on computing resources is reduced, the method can be operated on handheld equipment, the problem that traditional laboratory equipment is heavy is avoided, and construction personnel can conveniently and quickly deploy the equipment on site; the real-time performance is enhanced, the adaptive sliding window dynamically adjusts the window length and step length according to the data stability to ensure that the inference frequency is matched with the demulsification process, and the model can immediately respond to environmental changes such as temperature fluctuation and output a demulsification speed estimated value without obvious delay in combination with an online learning mechanism, so that the paving and compacting opportunities are guided; and construction interruption is reduced.

The invention discloses a preparation method of high-stability modified emulsified asphalt, and particularly relates to the technical field of asphalt materials, which comprises the following steps (by weight): S01, mixing 30-50 parts by weight of styrene-butadiene latex with the solid content of 45-60%, 10-25 parts by weight of acrylate copolymer emulsion with the glass transition temperature of-20-10 DEG C and 0.5-8 parts by weight of silane coupling agent to obtain a mixture A; a mixed emulsion is obtained; s02, adding 8-15 parts by weight of matrix asphalt, 2-8 parts by weight of a maleic anhydride grafted polypropylene compatilizer with the grafting rate of 1.0%-2.5% and a stabilizer into the mixed emulsion, and performing high-speed shearing at the rotating speed of 3000-5000 rpm for 20-40 min to obtain the modified polymer emulsion. According to the invention, the storage stability, the thermal stability and the interface bonding strength are improved.

The invention relates to the technical field of modified steel slag powder, and discloses a preparation method of modified steel slag powder applied to a cold-mixed full-steel-slag asphalt mixture, which comprises the following preparation steps: 1) stirring and mixing 80-90 parts by mass of steel slag, 10-20 parts by mass of waste slurry powder particles and 1-2 parts by mass of triethanolamine in a stirring drum to form a mixture; 2) grinding the mixture in a ball mill for a set time to form powder; 3) drying the powder in a dryer to obtain modified steel slag powder; through the preparation steps, the activity, the particle distribution uniformity, the compatibility with the emulsified asphalt and the chemical stability of the modified steel slag powder are remarkably improved, so that a higher-quality material choice is provided for the application of the cold-mixed full-steel-slag asphalt mixture.

The invention belongs to the technical field of emulsified asphalt recovery devices, and particularly relates to an emulsifying and separating device for waste asphalt regeneration, which comprises a base plate, and a crushing mechanism, an emulsifying mechanism and a centrifugal machine are sequentially arranged on the base plate; a discharge port of the crushing mechanism is communicated with a feed port of the emulsifying mechanism, and a discharge end of the emulsifying mechanism is communicated with the centrifugal machine; the crushing mechanism comprises a crushing box, and the crushing box is sequentially provided with a feeding hopper, a crushing assembly, a smashing assembly and a screening assembly from top to bottom. The emulsifying mechanism comprises a mixing box, a heating unit is arranged on the mixing box, a first stirring assembly and a second stirring assembly are arranged in the mixing box, a driving part is further arranged on the mixing box, and the first stirring assembly and the second stirring assembly are both in transmission fit with the driving part. According to the method, a middle conveying belt conveying link is omitted, the energy consumption and the cost are reduced, resource utilization of the waste asphalt is realized, and remarkable economic benefits are brought to enterprises.

The invention discloses a preparation process of a high-strength anti-crack and anti-seepage vertical shaft lining concrete material, which comprises the following steps: (1) uniformly mixing aggregate with a solution containing copper ions, drying to remove moisture, dropwise adding saturated lime water containing alkaline substances into the mixture, and drying to remove moisture to obtain pretreated aggregate; and (2) the pretreated aggregate is placed in a carbon monoxide atmosphere for reduction treatment, the reduction temperature is higher than the melting point of copper, and the surface modified aggregate is obtained after reduction treatment is completed. The surface modified coarse aggregate and the surface modified fine aggregate are respectively prepared according to the method. And (3) uniformly mixing the cement binding material, the surface modified coarse aggregate, the surface modified fine aggregate, the modified fiber, the solid waste-based powder filler, emulsified asphalt and a water reducing agent, adding mixing water, and uniformly mixing to obtain the concrete material. The concrete material disclosed by the invention has good mechanical strength and crack resistance and also has good water seepage resistance, and the service life of the pumped storage power station vertical shaft is effectively prolonged.

The invention discloses an epoxy resin modified emulsified asphalt micro-surfacing mixture and a preparation method thereof.The preparation method comprises the steps that matrix asphalt is subjected to gradient heating to 75-90 DEG C, nano silicon dioxide is added, stirring and shearing are conducted, and activated matrix asphalt is obtained; preparing a water-borne epoxy resin emulsion with the solid content of 45-50%, and controlling the mass ratio of epoxy resin to an emulsifier to be (8-10): 1 to form a stable dispersion system with the particle size of less than or equal to 1 mu m; preheating the mineral aggregate, adding the activated matrix asphalt while stirring, and continuing stirring; adding the water-borne epoxy resin emulsion, and continuously stirring; adding a vinylamine curing agent, continuously stirring to ensure that the curing agent is uniformly dispersed and avoid partial incomplete reaction, finally adding cement and water, and continuously stirring to form a uniform micro-surfacing mixture. The pavement performance such as high-temperature stability, low-temperature crack resistance and the like is remarkably improved through raw material system upgrading and process innovation, VOCs emission is greatly reduced, and green and environment-friendly effects are achieved.

The invention relates to the technical field of asphalt mixtures, and discloses a preparation method of a cold-mixed full-steel-slag asphalt mixture, which comprises the following preparation steps: 1) adding coarse steel slag and fine steel slag into an asphalt stirring pot according to parts by mass, and stirring to form mixed steel slag; 2) stirring and mixing the modified steel slag powder, polydimethylsiloxane, fly ash, hydrogen peroxide and the mixed steel slag in parts by mass to form a first part of mixture, and taking out the first part of mixture for later use; (3) stirring the emulsified asphalt, the water-borne epoxy resin, the water-borne curing agent and the defoaming agent in parts by mass to form a secondary mixture; 4) stirring and mixing the first part of mixture and the second part of mixture, then adding the modified steel slag powder, and stirring and mixing to form a cold-mixed full-steel-slag asphalt mixture; through specific preparation steps and material proportioning, the performance of the cold-mixed full-steel-slag asphalt mixture is comprehensively optimized, and the construction workability, durability, fatigue resistance and water damage resistance are improved.

The invention relates to the technical field of emulsified asphalt demulsification time determination, in particular to an emulsified asphalt demulsification time determination method, which comprises the following steps: monitoring the potential absolute value and conductivity of an emulsion in real time, and when the potential absolute value is reduced to a set potential absolute value threshold value and the short-term sudden acceleration rate of the conductivity exceeds a set rate threshold value, confirming that demulsification is started. Recording a demulsification starting time point; acquiring particle size parameters of asphalt particles and torque of a stirring shaft in real time; calculating a demulsification progress index based on the variance of the potential absolute value, the variance of the electric conductivity, the variance of the particle size parameter and the variance of the torque; comparing the demulsification progress index with a set progress index threshold value, and judging a demulsification ending time point; calculating a difference value between the demulsification ending time point and the demulsification starting time point to obtain demulsification time; various physical and chemical parameter changes in the demulsification process of the emulsified asphalt are comprehensively considered, limitation of a single index is avoided, and the demulsification starting time and the demulsification ending time are accurately determined, so that the accuracy and the reliability of a measurement result are improved.

The utility model provides an emulsified asphalt heating device which comprises an air heater, a tank body and a heating unit, the air heater introduces hot air into an air inlet pipe, and heat is uniformly transferred to emulsified asphalt through a coil pipe. A stirring assembly in the device is composed of a sleeve, a plurality of stirrers, arc-shaped fan blades, a guide cylinder and the like, and the stirrers are driven to rotate under the action of airflow, so that emulsified asphalt is effectively stirred, and layering is avoided. By optimizing the structural design of the coil pipe and the airflow channel, hot air can be uniformly distributed, the heating process of emulsified asphalt is accelerated, and meanwhile, the heating efficiency is improved. Due to the design of the stirring assembly, the emulsified asphalt is always kept uniform in the heating process, and the defects of non-uniform heating and insufficient stirring possibly occurring in a traditional heating device are overcome. In addition, the device can reduce energy waste and achieve an energy-saving effect by accurately controlling the gas flow and the stirring force. The device has the advantages of reasonable structure, simplicity and convenience in operation and good heating and stirring effects.

The invention provides a modified asphalt anti-collapse plugging agent for drilling fluid and a preparation method of the modified asphalt anti-collapse plugging agent, and belongs to the technical field of drilling plugging materials. The modified asphalt anti-collapse blocking agent for the drilling fluid is prepared from the following components in parts by weight: 42 to 68 parts of emulsified asphalt, 5 to 8 parts of chloroprene rubber, 8 to 12 parts of ethylene propylene rubber, 2 to 8 parts of cationic surfactant, 3 to 6 parts of water-soluble silicone oil, 20 to 35 parts of modified nano silicon dioxide, 0.1 to 1 part of carbon fiber, 1 to 3 parts of dispersing agent and 20 to 40 parts of water. The modified asphalt anti-collapse plugging agent prepared by the invention adopts emulsified asphalt, has small instantaneous filter loss and small high-temperature and high-pressure filter loss, and has a good plugging effect; the plugging agent can be easily dispersed in a drilling fluid, has environmental tolerance and high temperature resistance, can be used for plugging nano cracks and macro-pore stratums, can be applied to various complex stratums, is simple in preparation process and is suitable for industrial production.

The invention provides a solid waste-emulsified asphalt cold recycled mixture and a preparation method thereof, and belongs to the technical field of road engineering materials. According to the invention, asphalt mixture reclaimed materials (RAP), new aggregates, mineral powder, a cementing material, water and emulsified asphalt are used as raw materials, wherein the cementing material adopts blast furnace slag powder and fly ash to replace part of cement. By improving the mixing process, the cold recycling mixture is mixed more uniformly, so that the asphalt film thickness distribution on the surfaces of different types of aggregates after demulsification of the emulsified asphalt is uniform; the macroscopic pavement performance such as volume parameters, mechanical strength, water stability, high-temperature performance and low-temperature performance of the blast furnace slag powder-fly ash-emulsified asphalt cold recycled mixture sample is effectively improved.

The invention relates to the technical field of road materials, in particular to a high-strength composite modified emulsified asphalt material as well as a preparation method and application thereof. According to the high-strength composite modified emulsified asphalt material provided by the invention, a three-dimensional cross-linked network is formed through the cross-linking reaction of the waterborne epoxy resin and the emulsified asphalt, and the addition of the alkaline silica sol further refines the particles of the emulsified asphalt, enhances the interaction among the particles and consolidates the strength of an asphalt matrix; therefore, the emulsified asphalt has remarkable binding power and stability, and shows higher compressive strength and shear strength after being cured. Meanwhile, the micro porosity of the emulsified asphalt is optimized, the permeability of moisture is reduced, the waterproof performance is enhanced, the high temperature resistance and low temperature resistance are improved, and when the emulsified asphalt is applied to a micro-surfacing mixture, the shear strength, durability, binding force with aggregate and water damage resistance of the micro-surfacing mixture are remarkably improved.

The invention discloses an early strength type modified emulsified asphalt mixture and a preparation method thereof, the content of each substance in the asphalt mixture is as follows: 70-80 wt% of aggregate, 8-12 wt% of SBS modified emulsified asphalt, 8-10 wt% of an early strength agent and 4-8 wt% of mineral powder, the addition amount of the early strength agent is increased along with the increase of the addition amount of the SBS modified emulsified asphalt, and the addition amount of the mineral powder is increased along with the increase of the addition amount of the SBS modified emulsified asphalt. When the addition amount of the SBS modified emulsified asphalt is increased by 1 wt%, the addition amount of the early strength agent is correspondingly increased by 0.4-0.6 wt%. The preparation method comprises the following steps: preparing SBS modified asphalt and preserving heat for later use; preparing SBS modified emulsified asphalt, and sealing and storing; preparing an early strength agent and storing at normal temperature for later use; the aggregate, the early strength agent and the mineral powder are put into a mixing pot to be stirred; and adding the SBS modified emulsified asphalt into the mixing pot, and continuously stirring to obtain the early-strength modified emulsified asphalt mixture. The emulsified asphalt mixture prepared by the invention has the advantages of high initial strength, quick strength increase, good pavement performance and the like, can be used for paving an upper surface layer of a high-grade pavement, and can quickly open traffic after paving.

The invention relates to the technical field of road asphalt pavements, in particular to bio-oil regenerated emulsified asphalt with synchronous emulsification and modification regeneration and a preparation method thereof. The regenerated emulsified asphalt comprises the following components in percentage by mass: 30%-35% of new asphalt, 20%-25% of old asphalt, 34.2%-48.8% of water, 0.5%-2.0% of an emulsifier, 0.2%-0.4% of a co-emulsifier, 0.1%-0.4% of acid and 1%-3% of bio-oil. According to the invention, a regeneration process and an emulsified asphalt process are combined to prepare the bio-oil regenerated emulsified asphalt with synchronous emulsification and modification regeneration. The bio-oil regenerated emulsified asphalt with synchronous emulsification and modification regeneration has the characteristics of simple component composition and preparation process, can reduce the aging risk of asphalt, has the basic performance of emulsified asphalt, and conforms to the current strategy of solid waste resource utilization and environmental protection.

The invention relates to a multi-dimensional evaluation method for the non-sticking performance of emulsified asphalt, which comprises the following steps: (1) substrate treatment: selecting a fiberboard as a base material, drying, polishing with abrasive paper to form a test surface with the roughness deviation of + / -0.5 mu m, and spraying a 0.08-0.12 mm silicone oil film to simulate a pavement demolding layer; (2) preparing a test piece: spraying emulsified asphalt at the precision of 480-520g / m, and maintaining at constant temperature and constant humidity until demulsification is completed; (3) simulating a rolling test: dynamically rolling the colored rubber strip-emulsified asphalt interface at the speed of 20-26 times / min by adopting a 590-610N load test wheel; and (4) detecting the adhesion amount: uncovering the rubber strip at a constant speed at an included angle of 55-65 degrees, and calculating the wheel adhesion rate through the mass difference. The method can comprehensively and accurately evaluate the non-sticking performance of the emulsified asphalt, has the characteristics of simple operation steps and capability of highly simulating the real condition of a road surface, not only ensures that the test result is reliable, but also is low in cost and short in time consumption, and has a great significance for research and development, quality control and reasonable application in practical engineering of the emulsified asphalt. And reliable technical support and data reference are provided.

The invention relates to the technical field of asphalt pavement preventability, in particular to a water-based epoxy emulsified asphalt high-skid-resistance thin layer structure and a construction method thereof, and the structure sequentially comprises a water-based epoxy emulsified asphalt waterproof bonding layer and a water-based epoxy emulsified asphalt high-skid-resistance thin layer from bottom to top. And the waterproof bonding layer is formed by mixing emulsified asphalt and water-borne epoxy resin, demulsifying and curing. The high-skid-resistance thin layer is formed by mixing, paving, rolling and curing a wear-resistant aggregate and a water-based epoxy emulsified asphalt cementing material, the cementing material is demulsified and cured to form a three-dimensional cross-linked network structure, and the wear-resistant aggregate is embedded into the cementing material in a point contact manner and partially protrudes out of the surface of the cementing material. Compared with the prior art, the two-layer structure forms chemical bonding and synergistic enhancement through a three-dimensional cross-linked network of epoxy resin, has excellent surface skid resistance, water stability and durability, can effectively solve the problem of insufficient skid resistance of an asphalt pavement, remarkably improves the driving safety, and adopts normal-temperature construction.

The invention aims to provide bio-based modified CNC-Pickering emulsified asphalt and a preparation method thereof, and belongs to the technical field of modified emulsified asphalt. Comprising the following components in parts by mass: 45 to 55 parts of matrix asphalt, 45 to 55 parts of deionized water, 1 to 5 parts of cellulose nanocrystal, 0.5 to 1 part of gamma-aminopropyltriethoxysilane, 0.5 to 1.5 parts of sophorolipid, 0.1 to 0.3 part of sodium citrate, 0.1 to 0.3 part of sodium tripolyphosphate, 0.5 to 2 parts of polyvinyl alcohol, 0.1 to 0.3 part of xanthan gum and 0.05 to 0.1 part of butylated hydroxytoluene. The cellulose nanocrystal and Pickering emulsification technology are combined, so that the stability of the emulsified asphalt can be improved, the ageing resistance, high temperature resistance and low temperature resistance of the emulsified asphalt can be improved, and the high-performance requirement of road engineering on the emulsified asphalt can be met.

The invention discloses phase-change ice-inhibiting and self-repairing double-layer microspheres as well as a preparation method and application thereof, and belongs to the technical field of road engineering materials. According to the phase-change ice-inhibiting and self-repairing double-layer microsphere, a urethane thermal regulation shell sphere wall prepolymer serves as a shell, a self-healing core microsphere serves as an inner core, and a cold-resistant ice-inhibiting agent is clamped between the shell and the inner core, so that a double-layer microsphere structure is formed. Solid-solid phase change and solid-liquid phase change are ingeniously combined, the polyurethane capsule wall is endowed with a phase change function, and a double-layer protection mechanism integrating ice suppression, temperature control and self-repairing functions is comprehensively formed. The pavement crack caused by temperature stress is relieved through phase change self-temperature regulation in severe cold or summer weather, and when the phase change effect fails or cracks occur, the pavement can be timely broken to release a regenerant to repair the cracks. The microspheres can be widely applied to spraying and mixing emulsified asphalt or paving cold-mixed asphalt, can also be used for functional asphalt coatings, provides multiple protection functions of ice inhibition and heat insulation, and enhances the durability and adaptability of pavements.