8146 results about "Pitch" patented technology

The invention belongs to the technical field of emulsified asphalt materials, and particularly relates to an emulsified asphalt mixture and a preparation method thereof.The emulsified asphalt mixture is prepared from 95-98 parts of aggregate, 3-5 parts of early strength agent, 0-2 parts of water, 0-3 parts of mineral powder and 10-11 parts of modified emulsified asphalt, the modified asphalt is obtained by compounding and modifying SBS, petroleum resin and rubber powder. Through step-by-step preparation, the mixture has good emulsifying performance and can emulsify SBS and rubber powder, SBS, petroleum resin and rubber powder are organically combined, the mixture has good performance, meanwhile, the early strength agent is used, the early strength agent and modified emulsified asphalt can play a synergistic effect, the performance of the mixture is further improved, and the service life of the mixture is prolonged. All performance indexes of the emulsified asphalt mixture reach or even exceed those of a hot-mix asphalt mixture, and the emulsified asphalt mixture can be applied to a surface layer of an asphalt pavement and has very high actual use value.

The invention provides an asphalt-based closed-pore carbon material, a preparation method thereof and a sodium ion battery, the preparation method of the asphalt-based closed-pore carbon material comprises the following steps: S1, pre-oxidizing an asphalt-based carbon source in an oxidizing gas atmosphere at 200-350 DEG C to obtain a pre-oxidized product; s2, carrying out low-temperature carbonization on the pre-oxidized product in an inert atmosphere at 300-800 DEG C to obtain a first precursor; s3, performing gas activation on the first precursor in an activated gas atmosphere to obtain a second precursor; s4, performing chemical activation on the second precursor by adopting a chemical activating agent to obtain a porous carbon material; s5, dipping the porous carbon material in an asphalt solution, and then separating and drying to obtain a blank; and S6, carbonizing the blank under the protection of inert gas to obtain the asphalt-based closed-cell carbon material. The asphalt-based closed-cell carbon material has the advantages of high capacity, high first efficiency and high stable circularity.

The invention provides a hot in-place recycling asphalt mixture and a construction method, and relates to the technical field of asphalt mixtures, and the hot in-place recycling asphalt mixture is obtained by recycling old asphalt pavement materials in a high proportion, reducing new material consumption and carbon emission, realizing resource recycling and green construction and introducing a regenerant to recover the performance of aged asphalt. The high-temperature rut resistance, the low-temperature crack resistance, the fatigue resistance and the interface bonding strength of the mixture are synergistically improved by matching with the styrene butadiene rubber modifier, the basalt fiber, the nano silicon dioxide and other functional materials, and the mixture is ensured to be uniform and free of segregation through precise feeding sequence, high-pressure atomization spraying and forced stirring parameter control. The defects of gray materials, oil balls and the like are avoided, the compactness, the flatness and the overall structure stability of the regenerated pavement are improved, and the problems of performance degradation and insufficient durability of a traditional regenerated mixture are solved.

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

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

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 provides a quality control system and method for a foamed asphalt mixture, relates to the field of intelligent detection, and adopts an image recognition and detection technology based on machine vision to carry out gridding segmentation and sample performance local image block semantic coding on a sample image after the foamed asphalt mixture is compacted. And then spatial semantic enhancement is carried out on the semantic coding features of the performance local image blocks of each sample, so that whether the material performance meets a preset standard or not is intelligently judged according to energy global aggregation of the semantic enhancement features of the performance local image blocks of each sample after spatial semantic enhancement. Therefore, by analyzing the image of the whole sample area, the quality of the whole material can be comprehensively reflected. And meanwhile, tiny defects possibly neglected by a traditional method can be detected, so that comprehensive, accurate and intelligent quality control of the foamed asphalt mixture is realized.

A method for separating liquid-like (T2e) from solid-like (T2G) 1H NMR transverse relaxation times in porous media uses novel pulse sequences together with a 1H NMR spectrometer optimized for geological core samples. The method is applied to obtain 1D T2 distributions and 2D T1-T2 maps in organic-rich chalks for quantification of liquid-like signal (micropore fluids, meso-macropore fluids, fluids dissolved in organic matter, and clay-bound water) and solid-like signal (kerogen, bitumen, and clay hydroxyls). The novel pulse sequences comprise a solid-echo, which detects more solid-like signal than an FID. The method is used for fluid typing in micro / meso-macro pores, clay mineral identification, determination of kerogen content, and quantification of solvent-extracted bitumen versus bitumen expelled from kerogen due to swelling from dissolved hydrocarbons. The method is used to quantify the asphaltene, resin, aromatic, and / or saturate content of bitumen in the rock.

The invention provides a hard carbon material and a preparation method thereof, and the preparation method comprises the following steps: (S1) crushing asphalt, and carrying out heat treatment in an oxidizing atmosphere to obtain a pre-oxidized precursor; (S2) uniformly mixing the pre-oxidized precursor with a cross-linking agent I, and carrying out primary cross-linking under inert atmosphere and heating conditions to obtain a cross-linked precursor I; the cross-linking agent I is a polymer of which the side chain contains carboxyl; (S3) uniformly mixing the cross-linked precursor I and a cross-linking agent II, and carrying out secondary cross-linking in an inert atmosphere under a heating condition to obtain a cross-linked precursor II; the cross-linking agent II is a micromolecular aromatic hydrocarbon compound (S4) cross-linking precursor II containing a plurality of anhydrides and / or carboxyl groups, calcining, cooling and grinding in an inert atmosphere to obtain the amorphous sodium ion battery negative electrode material. The negative electrode material obtained by the preparation method disclosed by the invention has the advantages of high capacity, high magnification, low cost, simple preparation process, adjustable disorder degree and high carbon yield, and is a carbon material suitable for large-scale production.

The invention relates to the technical field of sodium ion battery research and development, and particularly discloses a strong-oxidizing acidified asphalt-based hard carbon negative electrode material and a preparation method and application thereof, concentrated nitric acid or concentrated sulfuric acid is introduced into asphalt as a cross-linking agent, so that the cross-linking reaction among molecules can be promoted under a low-temperature condition, and the structural stability of the material is greatly improved. Compared with a traditional method, the method has the advantages that the technological process is simplified, only one-step pretreatment is needed before carbonization, and energy consumption and pollution caused by high temperature can be avoided. According to the liquid phase cross-linking strategy, through reconstruction of chemical bonds, the low-softening-point asphalt can form a more compact carbon precursor network structure at low temperature, and formation of a high-performance hard carbon material in the subsequent carbonization process is facilitated.

The invention relates to the technical field of asphalt mixtures, and particularly discloses an asphalt regenerant and a preparation method thereof. The asphalt regenerant comprises the following raw materials in parts by weight: 40-60 parts of base oil, 10-15 parts of a styrene-butadiene-styrene block copolymer, 10-15 parts of microwave activated rubber powder, 5-8 parts of an antioxidant, 10-20 parts of a penetration enhancer and 3-8 parts of a stabilizer, the base oil is at least one of bio-oil and vegetable oil; the bio-oil and the vegetable oil are used for improving the flowability of the regenerant, the regenerant can better permeate into a microporous structure of aged asphalt, and the styrene-butadiene-styrene block copolymer and the microwave activated rubber powder are combined, so that the viscoelasticity and the deformation resistance of the asphalt can be improved; the recovery capability of the regenerant on asphalt with different aging degrees is improved.

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 carbon-carbon heaters, and particularly relates to a preparation method of a carbon-carbon heater. The preparation method of the carbon-carbon heater comprises the following steps: carrying out first vacuum filtration on a dispersion liquid of short carbon fibers in a mold, adding a mixed liquid of phenolic resin and ethanol into the mold, carrying out second vacuum filtration, demolding, curing and molding, dipping an obtained carbon-carbon heater blank in asphalt or phenolic resin, and carbonizing to obtain the carbon-carbon heater. The obtained carbonized blank is subjected to graphitization treatment, vapor deposition densification and purification treatment, and the carbon-carbon heater is obtained. Through vacuum filtration forming, manual knitting errors can be avoided, the uniformity of the product is better, and the conductivity of the prepared carbon-carbon heater is good. And meanwhile, large-batch production can be realized, the productivity is higher, the labor cost is saved, and time and labor are saved. The preparation method is low in raw material consumption, low in cost and convenient to operate, and the carbon-carbon heater is good in integrity, low in impurity content and good in conductivity and mechanical property.

Disclosed in the present invention are an emulsifier type cold-mixed and cold-laid asphalt mixture and a preparation method therefor. The emulsifier type cold-mixed and cold-laid asphalt mixture comprises the following components in parts by mass: 400-600 parts of coarse aggregate, 400-600 parts of fine aggregate, 90-160 parts of modified emulsified asphalt, 10-30 parts of a mineral filler, and 2-8 parts of a water reaction type resin demulsifier, wherein the molecular weight of the water reaction type resin demulsifier is 1 million-10 million. According to the emulsifier type cold-mixed and cold-laid asphalt mixture provided by the present scheme, without using cement, the forming speed of the early strength of the asphalt mixture is increased while ensuring the pavement performance of the asphalt mixture, and the technical problem in the prior art of the reclamation difficulty in a pavement laid by an asphalt mixture in which cement is added is solved, thereby overcoming defects in the prior art.

The invention relates to the technical field of concrete, and provides high-strength asphalt concrete and a preparation method thereof.The asphalt concrete is prepared from, by weight, 18-24 parts of asphalt, 8-16 parts of cement, 80-100 parts of gravel, 20-30 parts of cellulose ester derivatives, 40-50 parts of medium sand and 50-60 parts of mineral fine powder; the cellulose ester derivative comprises cellulose acetate phthalate and cellulose acetate, and the weight ratio of the cellulose acetate phthalate to the cellulose acetate is (1: 9)-(9: 1). According to the technical scheme, the problem of poor mechanical property of asphalt concrete in related technologies is solved.

The invention belongs to the technical field of asphalt recovery and separation, and particularly relates to asphalt reclaimed material multi-stage separation equipment and a separation method.The asphalt reclaimed material multi-stage separation equipment comprises a machine body, a feeding port is formed in the upper surface of the machine body, a crushing roller is rotationally arranged in the feeding port, and a first discharging port is formed in one side of the machine body; a first sieve plate is fixedly connected to the position, corresponding to the first discharging opening, in the machine body; a multi-stage screening assembly is arranged in the machine body and comprises a second screening plate, a second discharging opening is formed in the position, corresponding to the second screening plate, of the machine body, a third screening plate is arranged below the second screening plate, and the third screening plate is fixedly connected into the machine body. Large asphalt and stones often fall down together with a lot of small asphalt stones, so that the problem that the small asphalt blocks do not pass through sieve pores is solved.

The utility model relates to the technical field of asphalt stirring processing, in particular to an asphalt mixture heating regeneration stirring cylinder and stirring equipment. The stirring device comprises a cylinder body, wherein a stirring cavity is formed in the cylinder body; the stirring assembly is arranged in the stirring cavity, the stirring assembly comprises a stirring shaft, the stirring shaft penetrates through the cylinder body and the stirring cavity, a plurality of stirring arms are evenly distributed on the part, located in the stirring cavity, of the stirring shaft, and stirring blades are arranged on the stirring arms; the cover plate is arranged on the stirring cavity, and a microwave heating magnetron is arranged on the cover plate. The microwave heating magnetron is arranged on the cover plate at the top of the stirring cylinder, and microwave energy is converted into heat energy, so that an asphalt mixture in the stirring cylinder is uniformly heated, the flowability of the asphalt mixture is improved, the bonding phenomenon of the inner wall of the stirring cylinder and the stirring shaft is reduced, and the uniform stirring condition of the asphalt mixture is greatly improved; the stirring quality and the production efficiency of the stirring shaft equipment are improved.

The invention belongs to the technical field of asphalt mixtures, and relates to a high-dosage RAP low-temperature hot mix plant recycled SMA-13 asphalt mixture and a preparation process thereof, and the low-temperature hot mix plant recycled SMA-13 asphalt mixture comprises the following components by weight: 50-60 parts of an asphalt mixture reclaimed material; 30-40 parts of modified steel slag aggregate; 3-5 parts of SBS modified asphalt; 0.02 to 0.06 part of a low-temperature asphalt modifier; 3-8 parts of superfine slag powder; 0.2 to 0.5 part of lignin fiber; and 1-2 parts of a self-made asphalt regenerant. The limitation of the traditional RAP doping amount is broken through, the highest doping amount reaches 70%, the steel slag recycled aggregate replaces natural aggregate, the consumption of raw materials and the emission of waste are remarkably reduced, and the steel slag recycled aggregate meets the target requirements of the new era of dual-carbon strategy and sustainable development; and the method is particularly suitable for winter construction, heavy traffic roads and green road construction in iron and steel industry areas, and has technical advancement and engineering practicability.

The invention belongs to the technical field of battery materials, and discloses modified asphalt-based hard carbon as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing asphalt and a nitrogen-containing compound, carrying out a first heating reaction in a protective gas atmosphere, cooling, and carrying out a second heating reaction to obtain doped asphalt, carrying out oxidation treatment on the doped asphalt to obtain an oxidized material; and carrying out pre-carbonization and carbonization treatment on the oxidized material in a protective gas atmosphere to obtain the modified asphalt-based hard carbon. The doping of the gradient heating nitrogen element is beneficial to the construction of a three-dimensional conductive network and a flexible skeleton, and the conductivity and the structural stability of the modified asphalt-based hard carbon are enhanced, so that the electrochemical performance of the modified asphalt-based hard carbon is improved.

The invention relates to high-rubber regenerated composite SBS modified asphalt, and relates to the technical field of asphalt, and the high-rubber regenerated composite SBS modified asphalt comprises the following components by mass: 23-27 parts of modified desulfurized rubber powder, 4-5 parts of modified SBS, 0.5-1 part of a stabilizer, 2-3 parts of rubber oil, 58-62 parts of matrix asphalt, 2-3 parts of a compatibilizer, and 5-8 parts of a modified nano filler. The modified asphalt has the effect of improving the compatibility among the rubber powder, the SBS and the matrix asphalt, a polymer network structure with good stability is formed, and the low-temperature anti-cracking performance, the high-temperature anti-rutting performance and the waterproof performance of the modified asphalt are effectively improved.

A roofing membrane is provided that includes at least one substrate at least partially impregnated with a first asphalt coating composition and a liquid parting agent emulsion applied to the upper surface of the asphalt-coated substrate. The liquid parting agent emulsion comprises one or more thermoplastic polymers and about 15 wt. % to about 40 wt. % of at least one mineral filler, based on the weight of the total solids in the emulsion. The first asphalt coating composition is free of oxidized asphalt.

The invention provides a high-temperature-resistant magnesia-carbon composite refractory brick and a preparation method thereof, and belongs to the technical field of magnesium oxide refractory wall bricks, the refractory brick comprises the following raw materials: double-layer modified magnesium oxide, modified crystalline flake graphite, zircon powder, modified liquid phenolic resin and a benzoxazine cross-linking agent; the double-layer modified magnesium oxide is obtained by firstly coating magnesium oxide with powder phenolic resin, aluminum oxide and zirconium oxide and then coating magnesium oxide with asphalt, micron magnesium oxide, zirconium oxide and calcium oxide; the modified crystalline flake graphite is obtained by coating crystalline flake graphite with strontium hydroxide, asphalt and boron carbide; the modified liquid phenolic resin is formed by mixing liquid phenolic resin with a silane coupling agent and a polyacrylate cross-linked polymer. Double-layer modified magnesium oxide, modified crystalline flake graphite and modified liquid phenolic resin are prepared by adopting special components and a method and are matched with zircon powder and a benzoxazine cross-linking agent for use, and a reasonable forming and sintering process is designed, so that the refractory brick has good high-temperature stability, oxidation resistance, thermal shock resistance and the like.

The invention belongs to the technical field of asphalt mixture strength prediction, and discloses an asphalt mixture strength prediction method and system based on discrete element method simulation. The method comprises the following steps: calculating a bearing capacity index of a compacted and formed asphalt mixture coarse aggregate contact network; establishing a relationship between the interlocking friction characteristic of the coarse aggregate and the high-temperature deformation resistance of the asphalt mixture; establishing an asphalt mortar compactness index calculation model; establishing an asphalt mixture strength prediction model considering a coarse aggregate interlocking friction effect and an asphalt mortar compaction effect; and verifying the reliability of the strength prediction model by adopting an asphalt mixture shear slip test. According to the method, the three-dimensional dynamic virtual compaction model is established through the discrete element method, the strength forming process of the asphalt mixture is accurately simulated, the microcosmic strength characteristics of the asphalt mixture are explored by combining the interlocking friction effect of the coarse aggregate and the bonding and filling effect of the asphalt mortar, and the strength prediction level of the asphalt mixture can be improved.

The invention relates to the technical field of asphalt raw material crushing, and discloses asphalt preparation raw material crushing equipment and a crushing method.The asphalt preparation raw material crushing equipment comprises a crushing box and a material collecting box, a guide hopper is fixedly arranged at the bottom of the crushing box, a discharging pipe is fixedly arranged at the bottom end of the guide hopper, and mounting frames are fixedly arranged on the two sides of the material collecting box correspondingly; a screening barrel is rotationally arranged between the two mounting frames, a feeding pipe is fixedly arranged at the bottom of the mounting frame located on the right side, one end of the feeding pipe is rotationally connected with the middle of one end of the screening barrel, and the other end of the feeding pipe is in sliding fit with the discharging pipe; under the action of the synchronous transmission part, the screening barrel can be synchronously driven to rotate synchronously in the raw material crushing process, the crushed raw materials are screened, the material collecting box and the screening barrel are synchronously driven to move up and down in the rotating process of the screening barrel, and screening holes of the screening barrel are prevented from being blocked by the raw materials; and meanwhile, the impact roller is driven to intermittently vibrate the screening barrel, and the cleaning effect is further achieved.

The invention relates to the technical field of asphalt modifiers, and particularly discloses an asphalt regenerant as well as a preparation method and application thereof. The asphalt modifier comprises an oil phase, a polymer phase, a nano reinforced phase and a functional additive phase, wherein the oil phase comprises petrochemical oil and vegetable oil; the polymer phase comprises four-arm radiation star-shaped SBS and a rubber powder lysis solution; the nano reinforced phase comprises silane coupling agent modified nano montmorillonite and graphene; the functional additive phase comprises maleic anhydride grafted polyethylene and sucrose ester. The asphalt regenerant provided by the invention is suitable for various types of aged asphalt, in particular to aged polymer modified asphalt, each failure phase of the aged polymer modified asphalt is accurately repaired through a multi-phase synergistic mechanism, full-dimension regeneration of the aged polymer modified asphalt from a molecular scale to macroscopic performance is realized, and the asphalt regenerant has a wide application prospect. Excellent applicability and reliability are shown in regeneration of various types of aged asphalt, and a powerful guarantee is provided for high-quality implementation of road engineering.

The invention discloses an asphalt material healing and cracking performance detection method and system based on dynamic surface energy parameters, and particularly relates to the technical field of asphalt material detection. The method comprises the following steps: acquiring a surface energy parameter change curve and an initial surface energy parameter of an asphalt material under the action of different environmental conditions, and calculating in combination with an interface energy change rate in a time step to obtain a dynamic healing ability index and a cracking sensitivity index; in addition, finite element simulation is combined with environment load interaction analysis, the healing and cracking critical value of the material is calculated, and durability prediction parameters are further determined; on the basis, calculating a dynamic healing rate and a crack growth rate, and comparing the dynamic healing rate and the crack growth rate with actually measured cracking conditions under different working conditions so as to optimize a surface energy evolution model; the method can accurately evaluate the healing and cracking behaviors of the asphalt material in a complex environment, optimizes the material formula, improves the durability and service life of a road structure, and provides a scientific basis for engineering application.

The invention discloses a composite modified waste cooking oil biological asphalt mixture and a preparation method thereof. The asphalt mixture comprises the following substances in percentage by mass: 4-7wt% of biological asphalt, 89-92wt% of aggregate, 2-3wt% of mixed mineral powder and 0.5-1.0 wt% of lignin fiber, the biological asphalt is prepared from the following substances in percentage by mass: 50 to 58 weight percent of matrix asphalt, 18 to 20 weight percent of waste cooking oil, 15 to 18 weight percent of mixed rubber powder, 2 to 2.5 weight percent of polymer modifier, 6 to 8 weight percent of mixed resin and 1 to 1.5 weight percent of additive. The preparation method comprises the following steps: preparing biological asphalt; respectively putting the aggregates with various grades of particle sizes, the mixed mineral powder and the biological asphalt into a drying oven for heating; sequentially putting the biological asphalt and the aggregate with various grades of particle sizes into a mixing pot, and mixing; sequentially adding the mixed mineral powder and the lignin fiber into the mixing pot, and continuously mixing to obtain the composite modified waste cooking oil biological asphalt mixture. The biological asphalt is prepared in a layer-by-layer progressive mode, and the technical problem that the doping amount of the waste cooking oil and the performance of the biological asphalt are difficult to achieve balance is solved.

The invention relates to a regenerated rubber and plastic asphalt composite modifier based on shear force-temperature-interface modification as well as a preparation method and application thereof. The regenerated rubber and plastic asphalt composite modifier comprises 65-75 parts of tire rubber powder, 17-25 parts of polyethylene, 8-12 parts of aromatic oil and 0-2 parts of a silane coupling agent (not 0). All the raw materials are mixed and then added into a double-screw extruder, gradient temperature control is conducted through a feeding area, a plasticizing area and a homogenizing area, and finally granulation is conducted to obtain the regenerated rubber and plastic asphalt composite modifier. Compared with the prior art, the invention creatively utilizes the effects of double-screw shear force, high temperature, interface activation of the silane coupling agent, physical melting recombination and chemical interface activation, efficiently improves the integration and activation efficiency and effect of the tire rubber powder and polyethylene, and greatly improves the performance of the modified asphalt.

The invention discloses a cold patch asphalt mixture based on dearomatization solvent oil and a preparation method thereof, the cold patch asphalt mixture comprises the following substances in percentage by mass: 89-91 wt% of aggregate, 2-3 wt% of mineral powder, 2-3 wt% of cement, 0.4-0.6 wt% of bentonite and 4-6 wt% of asphalt cold patch liquid, and D60 dearomatization solvent oil is used as a diluent in the asphalt cold patch liquid. The preparation method comprises the following steps: preparing asphalt cold supplementing liquid, and preserving heat for later use; drying the aggregate, the mineral powder, the cement and the bentonite, and preserving heat for later use; the mixing pot is heated, and the aggregate, the cement and the bentonite are put into the mixing pot to be stirred; adding the asphalt cold supplementing liquid into the mixing pot for stirring; and adding the mineral powder into the mixing pot, and stirring to obtain the cold patch asphalt mixture based on the dearomatization solvent oil. The cold patch asphalt mixture prepared by the invention has excellent comprehensive performance, perfectly meets the performance requirement of a hot mix asphalt mixture, can quickly form strength, can quickly open traffic after repairing pits and slots, and has small influence on road traffic.

The invention relates to the technical field of asphalt performance analysis, in particular to a method for detecting and analyzing physical properties of polymer modified asphalt. According to the invention, the collected asphalt sample is subjected to pretreatment means of vacuum degassing, multi-angle image bubble monitoring and constant-speed stirring, the uniformity of the asphalt sample is judged according to physical state parameters at different positions, the reliability of subsequent detection data is further improved, and a plurality of uniformly-divided target asphalt samples are respectively placed in the constant-temperature containers; the method comprises the following steps: recording the heat conduction temperature of each target asphalt sample at different monitoring points in a constant-temperature water bath in real time, carrying out penetration detection on each target asphalt sample after the sample reaches heat balance, carrying out penetration index analysis according to the incidence relation between the temperature and the penetration, and evaluating the physical properties of the polymer modified asphalt based on the penetration index. The penetration data under different temperature gradients can be accurately obtained, the physical properties of the polymer modified asphalt can be comprehensively and accurately evaluated, and a reliable basis is provided for engineering quality control.