541 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 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 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 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 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 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 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.

The present invention discloses a crack-resistant and durable long-life asphalt pavement structure and its construction method, which relates to the technical field of asphalt pavement construction. It includes an asphalt surface layer, a reinforcement mesh, positioning piles, and fixing rings. A geotextile stress absorption layer is provided under the asphalt surface layer, and a prime coat is provided under the geotextile stress absorption layer. The prime coat is SBS modified emulsified asphalt. By using polypropylene geotextiles to reinforce the pavement structure and form a composite structure with road materials, it has strong interfacial effects and reinforcement functions, forms a good whole with the surface layer and the base layer, effectively prevents or delays the cracking of asphalt pavements, improves the service life of the asphalt surface layer. After the polypropylene geotextiles are combined with the prime coat oil, it has excellent waterproof effects, prevents surface water from seeping into the pavement structure and eroding the roadbed, and extends the service life of the pavement.

The invention discloses an emulsified asphalt and steel slag ultrathin overlay mixture as well as a preparation method and application thereof, and relates to the technical field of road building materials. The emulsified asphalt and steel slag ultrathin overlay mixture comprises mineral aggregate, emulsified asphalt and cement, the mineral aggregate comprises 30%-35% of modified steel slag aggregate with the particle size of 5-10 mm, 60%-70% of limestone aggregate with the particle size of 0-5 mm and 1%-3% of limestone mineral powder; the preparation method of the modified steel slag comprises the following steps: primarily treating the steel slag with CO2 gas, soaking with cement slurry, soaking with a sulfydryl silane coupling agent, spraying the surface with methyl phenyl silicone resin to enable the steel slag to obtain hydrophobic coating, and finally spraying epoxidized soybean oil. By modifying the steel slag and optimizing mineral aggregate gradation, the ultrathin overlay prepared from the mixture is durable, anti-slip, anti-crack and waterproof, stable in structure and high in overall cohesive force.

The invention relates to the technical field of pavement materials, and particularly discloses an all-solid waste asphalt mixture as well as a preparation method and application thereof. The all-solid waste asphalt mixture is prepared from the following raw material components: activated waste rubber powder, waste rubber powder modified emulsified asphalt, a waste asphalt-based pavement material, aggregate, a fiber material and an additive, wherein the aggregate comprises coal gangue powder, waste magnesia carbon brick powder, nut shell powder, coarse aggregate, steel slag powder and fine aggregate; the fiber material comprises activated aramid fiber and waste rubber powder modified glass fiber reinforced plastic fiber; the additive comprises a smoke suppression viscosity reducer and a styrene-butadiene-styrene block copolymer. The all-solid waste asphalt mixture with excellent pavement performance is prepared by utilizing the synergistic effect of all the component raw materials, and the problem that the pavement performance of an asphalt regenerated mixture is poor due to the fact that existing solid waste is poor in compatibility with other components when being applied to the asphalt regenerated mixture is effectively solved.

The invention belongs to the technical field of emulsified asphalt materials, and particularly relates to a water-resistant emulsified asphalt mixture based on epoxy resin as well as preparation and test methods thereof, and the water-resistant emulsified asphalt mixture comprises the following components in parts by weight: 90-95 parts of aggregate, 3-5 parts of early strength agent, 1-2 parts of water, 2-3 parts of mineral powder and 10-15 parts of modified emulsified asphalt, the modified emulsified asphalt comprises the following components in parts by weight: 45-55 parts of modified asphalt, 3-8 parts of an emulsifier, 20-25 parts of epoxy resin and 15-22 parts of water, wherein the modified asphalt comprises the following components in parts by weight: 80-100 parts of matrix asphalt, 3-5 parts of SBR (Styrene Butadiene Rubber), 2-5 parts of petroleum resin, 1-2 parts of a toughening agent and 5-10 parts of a composite curing agent. Through step-by-step preparation, the mixture has very good low-temperature toughness and mechanical properties, and the water resistance of the material can be improved, so that the emulsified asphalt mixture is applied to a surface layer of an asphalt pavement, and the application scene of the emulsified asphalt mixture is widened.

The invention discloses a cold mixing type road rapid repair material based on a steel slag microwave heat effect and a preparation method thereof, and belongs to the technical field of road repair materials. The method comprises the following steps: reacting bisphenol A epoxy resin E51 with polyethylene glycol PEG-4000 under the action of a catalyst to prepare waterborne epoxy resin; the preparation method comprises the following steps: mixing an amine curing agent, a defoaming agent and BC-1 cationic emulsified asphalt, introducing waterborne epoxy resin, and shearing to prepare a cementing material; the method comprises the following steps: mixing crushed and screened steel slag (with the particle size of 0.6-2.36 mm) with basalt and limestone aggregate according to grading, drying, infiltrating, mixing with a cementing material, and finally heating by microwaves to quickly cure and form. According to the invention, the steel slag is taken as the electromagnetic response aggregate for the first time, the rapid crosslinking characteristic of the water-borne epoxy resin and a microwave heating technology are combined, the early strength, water stability and fatigue resistance of the emulsified asphalt mixture are synergistically improved, and meanwhile, resource utilization of industrial solid waste and reduction of construction energy consumption are realized; and an efficient, convenient, high-strength, good-durability and environment-friendly solution is provided for rapid repair of road damage.

The invention discloses a preparation method of interface-enhanced special emulsified asphalt, which comprises the following steps: taking raw materials such as matrix asphalt, a nano polymer interface enhancer, a modifier and the like in parts by weight, carrying out surface modification by the nano polymer interface enhancer, modifying the matrix asphalt, preparing an emulsified aqueous solution, and mixing the modified enhancer with the emulsified aqueous solution, thereby obtaining the interface-enhanced special emulsified asphalt. And applying a pulsed magnetic field and emulsifying by a colloid mill while mixing to obtain a finished product. Compared with the prior art, the method has the advantages that the interface bonding force is improved through nanometer material surface modification and pulsed magnetic field induced arrangement, the high-temperature performance is improved through the phase change material and the modifier, construction damage is reduced by means of the self-repairing microcapsules, and the method has the advantages of being high in bonding strength, good in high-temperature stability, resistant to construction pollution and the like; the problems that traditional emulsified asphalt is low in bonding strength, poor in high-temperature performance, prone to being damaged during construction and the like can be effectively solved, pollution and damage in the construction process are avoided, and the construction quality is improved.

The invention provides an emulsified asphalt cold-mixing and cold-paving type asphalt pavement material as well as a preparation method and application thereof, and belongs to the technical field of cement-based modified asphalt pavement materials. The material is a composition product comprising an AC-20SBS modified emulsified asphalt cold-mixed and cold-laid asphalt mixture and an AC-25 common emulsified asphalt cold-mixed and cold-laid asphalt mixture. The material can effectively replace a hot mixing type asphalt pavement material; the material has the same asphalt pavement material performance, and the dynamic stability of the material can reach 10500 times. Mm <-1 > and is far beyond the technical requirements; the overall performance is excellent, and the comprehensive durability of the pavement material in the whole life cycle is realized. The preparation method is simple and easy to operate, and heating and mixing treatment is not needed; the preparation cost is low, clean production is realized, and the method is suitable for large-area popularization. The material is applied to a surface layer structure of an asphalt pavement as a middle-lower surface layer structure, and has relatively high pavement wear resistance.

The invention relates to the technical field of steel slag asphalt material detection, in particular to an RAP-steel slag emulsified asphalt cold-recycled mixture expansion rate detection method, which comprises the following steps: firstly, curing a prepared RAP-steel slag emulsified asphalt cold-recycled mixture Marshall test piece, and in the curing process, enabling a resistance strain gauge adhered to the test piece to deform so as to detect the expansion rate of the RAP-steel slag emulsified asphalt cold-recycled mixture. The resistance value is changed; then, calculating a strain value according to the working principle of a resistance strain gauge, and analyzing the expansion strain condition of the test piece at the position; and finally, accurately and efficiently detecting the expansion rate of the RAP-steel slag emulsified asphalt cold recycled mixture according to the calculated strain values at different positions. The method for detecting the expansion rate of the RAP-steel slag emulsified asphalt cold recycled mixture solves the problems that measurement positions of a vernier caliper are different before and after a test piece is soaked in water and measurement is inaccurate due to the fact that water intrudes into a dial indicator in the maintenance process, overcomes the defect of single measurement of soaking expansion, and has the characteristics of high precision, real-time detection and multi-latitude measurement.

The invention provides a polymer cationic asphalt emulsifier as well as a preparation method and application thereof. According to the preparation method of the polymer cationic asphalt emulsifier, three monomers including 9-octadecenoic acid methyl ester, maleic anhydride and p-vinyltoluene are utilized to react to obtain the polymer cationic asphalt emulsifier. Based on a free radical polymerization technology, various functional groups (long-chain alkyl, a methyl styrene chain, imidazoline and the like) are integrated into a single polymer skeleton, so that the interfacial activity of an emulsifier is expected to be improved, the stability and the use performance of emulsified asphalt are improved, high efficiency and economical efficiency are achieved, and the development trend of green road materials is met. Compared with a traditional asphalt emulsifier, the polymer cationic asphalt emulsifier has higher surface activity and excellent high and low temperature stability.

The invention relates to the field of road engineering material detection, in particular to a method for obtaining emulsified asphalt residues and measuring the content through medium and low temperature evaporation. Comprising the following steps: providing an evaporation container assembly containing an emulsified asphalt sample with preset mass, and sequentially weighing the mass of the evaporation container assembly before and after containing; placing the evaporation container assembly and the contents thereof in an environment of 130-140 DEG C for heat preservation for 80-100 min, and stirring the contents at least once in the heat preservation stage; transferring the evaporation container assembly and the contents thereof to an environment at 60-70 DEG C, and preserving heat for 230-250 minutes to obtain emulsified asphalt evaporation residues; and after cooling, weighing the total mass of the evaporation container assembly and the contents of the evaporation container assembly, and calculating the content of the emulsified asphalt evaporation residues. The method overcomes the problems of asphalt aging distortion caused by high temperature in the traditional method and low efficiency, poor accuracy and poor repeatability in the existing medium and low temperature method.