70 results about "Bituminous materials" patented technology

The invention provides an asphalt material softening point prediction modeling method based on an infrared spectrum, and belongs to the technical field of road engineering material performance prediction. The method comprises the following steps: collecting infrared spectrum data of a multi-source asphalt sample and carrying out standardization pretreatment; fusing and extracting functional group quantitative features, wavelet multi-scale features and principal component dimension reduction features; constructing a high-stability feature subset by adopting a progressive feature optimization strategy guided by a physical mechanism; a self-adaptive Stacking fusion model is constructed and trained, the model integrates four base learners including PLSR, SVR, random forest and gradient boosting regression, and Bayesian ridge regression is used as a meta-learner to realize uncertainty quantification of a prediction result. The method can quickly output the predicted value of the softening point without a physical test, solves the technical problems of low efficiency and poor consistency of a traditional method, and is suitable for production quality control, on-site quick detection and formula optimization of asphalt materials.

The application relates to the technical field of composite asphalt materials, in particular to a composite asphalt material based on modified SBS and a preparation method thereof, which comprises the following steps: S1. After heating, base asphalt is added with aromatic oil, and stirring is carried out for 15-20 min to obtain softened asphalt; S2. Preparation of modified SBS; S3. Modified SBS is gradually added into the softened asphalt, and shearing is carried out for 30-40 min; S4. Modified waste rubber powder is added, and after continuous shearing, sulfur is added, development is carried out at a rotating speed of 800-1000 rpm for 50-60 min, and the composite asphalt material based on modified SBS is obtained after standing and defoaming. Through the synergistic effect of modified SBS, modified waste rubber powder and modified additives, the synchronous improvement of high-temperature performance, low-temperature performance and fatigue resistance is realized, the performance attenuation rate of the composite asphalt material under the conditions of thermal oxygen aging and ultraviolet aging is reduced, and the service life of the asphalt pavement is prolonged.

An improved substantially solid brick of non-volatile bituminous material has a shape that is defined by an irregular outer surface to minimize surface contact with nearby bricks when shipped in bulk. The overall shape is preferably that of a modified tetrahedron having three non-planar face surfaces, a top surface, and a surface or point. Both the top and bottom surfaces are preferably modified domed shapes comprised of several sections. The face sections are preferably modified concave surfaces comprised of several triangular sections that can be planar, concave, or convex. The brick is partially or fully encased by a removable wrapper or removable wrapper segments and can further include a skeleton distributed throughout. The skeleton can be a customizable matrix, framework of fiber groups, or other structure and can include customizable buoyant features such as air pockets or capsules.

An asphalt concrete product comprising of the following materials: 69.6 grams of bitumen, 734.76 grams of coarse aggregates, 305.21 grams of fine aggregates, 90.43grams of fillers, and 12 grams (1%) to 36 grams (3%) dried cut pieces plastic wastes cooked altogether as asphalting materials conferring to the procedures of making asphalt concrete. The wastes out of plastic and cellophane will replace part of bitumen from 12grams (1%) to 36grams (3%) of the total parts in an asphalt concrete product. The product has the characteristics of significant lesser weight densities ranging from 2.157g / cm3 to 2.280g / cm3 , comparable water absorption rates at percentages from 0.224% to 0.397% and with improved Marshall Stability results from 3,593.64lbs to 3,620.80lbs.

This invention discloses a method and system for testing and evaluating the rheological properties of lead-zinc tailings modified asphalt materials, relating to the field of tailings recycling technology. The method includes: preparing lead-zinc tailings modified asphalt materials according to different mass ratios and conducting short-term aging simulations; performing rheological tests on a comparative sample set at multiple discrete temperature points; obtaining a comprehensive rheological property dataset and determining the high-temperature performance score, low-temperature performance score, and comprehensive synergistic balance coefficient for each mass ratio; conducting a temperature sensitivity comparative analysis on all mass ratios; identifying the recommended lead-zinc tailings mass ratio that achieves the target synergistic performance state; generating a comprehensive evaluation report containing the recommended mass ratio, high-temperature and low-temperature performance scores for each mass ratio, and the temperature sensitivity comparative analysis results. This invention identifies the modified formulation that achieves the optimal synergistic performance at both high and low temperatures and outputs the temperature sensitivity analysis results, providing a data-driven decision-making basis for modified asphalt formulation design and performance optimization.

The application provides a collection system and method of gaseous volatile components in asphalt. The temperature-controllable asphalt emission detection and collection system developed by the application can realize sampling of gaseous volatile components in the whole life cycle of typical asphalt materials, and simultaneously uses a gas detector to detect and analyze TVOC, SO2, CO and other gaseous inorganic pollutants, thereby enhancing the completeness of asphalt emission detection. Based on the scheme, the sample can be quickly collected for subsequent analysis and use, and the application has small occupied area and is convenient to maintain.

The present application belongs to the technical field of road engineering material testing, and particularly relates to a determination method for judging asphalt similarity based on a rheological curve, which adopts a dynamic shear rheometer to perform frequency scanning at multiple temperature points, and constructs a complex modulus master curve or a phase angle master curve based on the time-temperature equivalence principle. Through calculation of the overlapping degree of the confidence intervals of the difference factor F1, the similarity factor F2 and the WLF temperature sensitivity parameters, quantitative evaluation of the viscoelastic behavior of asphalt materials in the full temperature domain and the full frequency domain is realized. The present application first proposes a double-track determination framework, which can simultaneously reflect the differences in the master curve form and the temperature response characteristics, and supports comparison of multiple states such as unaged, RTFOT aged, PAV aged through a multi-condition batch processing mechanism. The method has high detection efficiency and strong repeatability, and is suitable for engineering application scenarios such as asphalt production quality control, road construction acceptance and oil source compatibility evaluation.

The invention discloses mixing equipment for fog seal material preparation and a using method thereof, and relates to the technical field of asphalt material mixing, the mixing equipment comprises a mounting plate, a connecting unit is arranged on one side of the top of the mounting plate, a mixing unit is arranged on the other side of the top of the mounting plate, and a mixing mechanism is arranged at the front end of the top of the mounting plate. A material spraying unit is arranged in front of the material mixing mechanism, and the material spraying unit and the mounting plate are in threaded connection with an external moving trolley through bolts. The mounting plate is arranged to support the connecting unit, the mixing unit and the mixing mechanism, the connecting unit can be used for limiting a charging barrel of an emulsified asphalt material and is matched with the mixing unit to convey the material, the mixing unit is arranged to mix a demulsifier required by spraying, and wear-resistant materials such as carborundum are added in a linkage manner, so that the spraying efficiency is improved, and the spraying quality is improved. Wherein the materials can be selected regardless of the requirement for uniform viscosity of the emulsified asphalt material, so that the requirements for wear resistance and skid resistance of the pavement are better met.

The utility model relates to the field of waste recovery, and discloses a waste asphalt material feeding device which comprises a supporting frame, a conveying belt is arranged at the top end of the supporting frame, a vibrating and leaking device is arranged on the right side of the supporting frame and comprises a connecting box, and a connecting block is fixedly connected to the upper end of the connecting box. A scraping plate assembly is further arranged on the inner side wall of the left side of the connecting box, the scraping plate assembly comprises an inserting block, the inserting block is elastically connected into the cavity of the connecting box through a spring, a mounting groove is formed in the side wall of the connecting box, and a scraping plate is inserted into the inner wall of the mounting groove. According to the asphalt conveying device, residual asphalt adhered to the conveying belt can be scraped and cleaned by arranging the scraper assembly, the conveying belt is kept smooth, the blocking risk caused by asphalt adhesion is reduced, the scraper can be quickly disassembled and assembled by drawing the insertion block, and a professional tool is not needed. And a worker can conveniently clean and maintain the scraping plate.

The application relates to the technical field of measurement and monitoring of road engineering variables, and a bituminous pavement paving quality management system, which comprises a data acquisition module configured to acquire real-time meteorological data, mixture temperature parameters and pavement quality monitoring data; a viscosity analysis module configured to determine a dynamic viscosity adjustment range of bituminous material based on the real-time meteorological data and the mixture temperature parameters; a temperature control module configured to regulate and control mixing temperature according to bituminous material viscosity change and generate a target paving temperature curve; and a power optimization module configured to match a dynamic adjustment strategy of a paving machine screed heating power based on the target paving temperature curve. Through the system, meteorological and construction data are monitored in real time, bituminous viscosity, screed power and other parameters are dynamically regulated and controlled, closed-loop optimization is realized, paving quality is improved, and intelligent construction is realized.

The utility model relates to the technical field of filling device, concretely is adjustable road surface pit filling device, the utility model discloses a vehicle body, one end of vehicle body is provided with the rotary shaft that helps bearing rotary connection, the both ends fixed connection of rotary shaft have the wheel, the upper end fixed connection of vehicle body has liquefied tank and feed hopper, feed hopper penetrates vehicle body, the lower end fixed connection of vehicle body has the flame -spouting head, the fixed connection of flame -spouting head and liquefied tank has the trachea, by setting the adjusting assembly, when adjusting feed hopper discharge rate, the worker pushes vehicle body, through transmission mechanism, makes drive rod rotate, makes the regulation leaf rotate to the bituminous material in feed hopper is discharged, when the worker pushes vehicle body to be fast, through transmission mechanism, make drive rod rotate fast, make the regulation leaf rotate fast, the bituminous material in feed hopper is discharged fast, and further reach the effect of adjusting feed hopper discharge rate as far as possible.

The present application belongs to the technical field of road material, and particularly relates to a preparation method and evaluation method of a test piece for testing the blocking performance of heavy metal elements in waste fly ash, wherein the preparation method comprises the following steps: mixing different amounts of waste fly ash material with asphalt material respectively, obtaining waste fly ash-asphalt mortar with different doping amounts through 7 steps, and finally obtaining the final test piece. The present application has the following advantages: 1. The present application prepares asphalt mortar pieces with different doping amounts, and then assembles and combines them, so as to analyze the sedimentation trend of waste fly ash in the test piece, and further analyze the blocking effect of the asphalt material. 2. The evaluation test of the present application can avoid the randomness of data, and accurately obtain the heavy metal element penetration under different layer quality tests and different working conditions, so as to objectively evaluate the blocking effect of the asphalt material on the waste fly ash.

A ground compaction system for compacting asphalt material, comprising at least one ground compactor (10) which moves over asphalt material (16) to be compacted, at least one display unit (36) having a display (38) for displaying compaction operation information associated with a ground compaction operation process to be performed, wherein the at least one display unit (36) is designed to display at least one reversal boundary (50, 52) associated with the movement of the at least one ground compactor (10) over the asphalt material (16) to be compacted on the display (38), wherein the at least one reversal boundary (50, 52) indicates a movement boundary of the at least one ground compactor (10) in a movement direction (B1, B2).

The invention provides a cyclic loading-multi-stage intermittent asphalt material fatigue crack critical healing point testing method, and aims to test a material self-healing failure critical point by gradually increasing the fatigue damage degree of an asphalt material. The test method comprises three stages: a lossless load cyclic loading stage, a lossy load cyclic loading stage and a multi-stage intermittent and lossless loading stage. Besides, the damage density variable quantity of the asphalt material after the fatigue crack is healed is used as an evaluation index of the healing critical point, the physical meaning of the damage density variable quantity is the crack area reduction proportion of the asphalt material before and after the intermittent fatigue crack is healed, and the smaller the numerical value is, the closer the material critical healing point is under the current damage degree. The index overcomes the limitation of experience-dependent macro-performance indirect evaluation in the prior art, and provides technical support for healing ability evaluation and material crack resistance optimization design of asphalt materials.

The invention discloses a production method of high-ductility blended asphalt, and belongs to the technical field of asphalt material modification. The method comprises the following steps: preparing a liquid blender; heating the base asphalt to a molten flow state, and mixing the base asphalt with the liquid blender to obtain an asphalt premix; adding a solid blender into the asphalt premix, and reacting; and carrying out constant-temperature curing treatment on the obtained mixture to finally obtain the high-ductility blended asphalt. The process successfully solves the technical bottleneck that the ductility of traditional asphalt is sharply reduced especially in a low-temperature environment, the ductility of the prepared blended asphalt at 10 DEG C can be stably improved to 50 cm or above, meanwhile, good storage stability and construction workability are kept, raw materials are easy to obtain, process conditions are mild and controllable, and the blended asphalt is very suitable for large-scale industrial production and has wide application prospects. Wide application prospects are realized in the pavement of high highways and bridge decks and the construction and maintenance of roads in severe cold areas.

The utility model relates to the technical field of pavement maintenance, in particular to an asphalt pavement old material thermal regeneration maintenance truck which comprises a bottom plate, a gas storage tank is connected to the upper end of the bottom plate, a spray gun is arranged on one side of the gas storage tank, a connecting pipe is connected to one side of the gas storage tank, and a crushing cutter is rotationally arranged at the lower end of the bottom plate. When used materials on the ground are heated, the valve can be opened synchronously to heat the mixing tank, and the mixing tank can be preheated when the used materials do not enter the mixing tank, so that the temperature difference between the used materials and the tank body is reduced, and the situation that the used materials are rapidly cooled due to contact with the low-temperature tank body is avoided; and after the old material enters the mixing tank, a new asphalt material is softened through heating, the viscosity of the new asphalt material is reduced, the old material can be more uniformly mixed with newly added asphalt, a regenerant, a new aggregate and the like, and the thermal regeneration maintenance truck for the old material of the asphalt pavement is realized.

This invention provides a dynamic modulus testing system, method, and prediction method for asphalt mixtures, belonging to the technical field of asphalt material testing. It includes a test chamber for placing multiple asphalt mixture specimens; a strain acquisition component for acquiring the strain of the specimens placed in the test chamber due to load; a temperature acquisition component for acquiring the temperature of the specimens placed in the test chamber; a circulating temperature control device connected to the test chamber for controlling the temperature of the specimens placed in the test chamber, ensuring the dynamic modulus test is performed at a target temperature; and an accelerated loading device including a tire, which accelerates the loading of the specimens placed in the test chamber by adjusting the tire. This invention can simulate the testing of the dynamic modulus of asphalt mixtures under real-world conditions and achieve accurate prediction of the dynamic modulus of asphalt mixtures.

The present invention provides method for manufacturing construction parts from recycled residual bitumen material and recycled polyethylene. The cleaned and shredded residual bituminous material, which is bitumen-containing roofing material, is mixed with shredded recycled polyethylene in a heated mixer. Stabilizers and fillers are added to the mixture. Construction parts are made from the resulting mixture by pressing or molding.

The application discloses a pulling device for detecting the bonding strength of asphalt material, which comprises a base, a vertical column arranged on the base and a crossbeam horizontally arranged on the vertical column, wherein the free end of the crossbeam is provided with a tension sensor for detecting the tension signal generated in the pulling process of the bonding test piece, a pneumatic push rod is arranged below the tension sensor and can realize axial linear movement for providing controllable tension, a displacement sensor for testing the displacement of the pneumatic push rod is arranged on one side of the pneumatic push rod, a pulling head is connected to the end of the pneumatic push rod for connecting with the surface of the bonding test piece and realizing interface separation in the loading process of the pneumatic push rod. The application can realize stable and controllable loading process, accurate force value collection and efficient test process and is suitable for rapid evaluation of the bonding strength of asphalt material.

A system is provided. The system includes a conveyor apparatus configured for conveying an asphalt material and an asphalt cement measurement system positioned about the conveyor apparatus for determining asphalt cement content in the material. A dimension characteristic measurement system for detecting one or more dimension characteristics of the material is provided and a computer device is configured to manipulate data received from the asphalt cement measurement system and the dimension characteristic measurement system to determine an asphalt cement percentage (AC %) of the material.

The application discloses a method for rapidly changing asphalt into thermosetting material, which comprises the following steps: (1) crushing asphalt material into asphalt powder with particle size in micron level; (2) reacting the asphalt powder in step (1) in a pre-oxidation liquid containing hydrogen peroxide and metal-based catalyst for 0.5-1.5 hours, then filtering, rinsing and drying the slurry; (3) heating the dried powder in step (2) to 250-350 DEG C at a heating rate of 5-15 DEG C / min in an oxidizing atmosphere, and keeping the temperature for 0.5-2 hours to obtain thermosetting asphalt material. The method of the application can generate a large number of high-activity hydroxyl radicals by using hydrogen peroxide and metal-based catalyst, so as to accelerate the oxidation cross-linking reaction of asphalt and oxygen, or reduce the temperature of the cross-linking reaction of asphalt and oxygen, thereby shortening the time for changing asphalt from thermoplastic material into thermosetting material, and further effectively reducing the cost.

According to the asphalt material temporary storage moving device for highway expansion joint laying, a stirring and mixing device is additionally arranged in existing similar moving equipment, and under the condition that an original local heating assembly structure is still kept, the stirring and mixing device can be used for stirring and mixing asphalt materials. All asphalt materials stored in the device can be uniformly heated, high fluidity of the materials and performance consistency of all the materials are guaranteed, workers can integrally adjust the performance states of all the asphalt materials conveniently, and meanwhile the local pavement construction quality of a pavement can be improved. The device comprises a bearing platform storage box body, an inclined guide part used for guiding a bottom asphalt material to one side of a lifting opening and closing bin door is arranged in the storage box body, and a heat preservation heating unit is arranged at the lower position, close to the inclined guide part, of the bearing platform; and a stirring and mixing mechanism for upwards lifting and moving the asphalt material at the bottom is also arranged in the storage box body.

The present application relates to the technical field of road engineering, and provides a kind of asphalt peculiar smell feature evaluation method, the method comprises: determining the peculiar smell activity value of various asphalt volatile matter;Various asphalt volatile matter is classified to obtain various components, and the component concentration of various components is determined;According to the peculiar smell activity value of various asphalt volatile matter, the component peculiar smell activity value of various components is added, to determine the component peculiar smell threshold value of various components according to the component peculiar smell activity value of various components and component concentration;According to the component peculiar smell threshold value of various components and component concentration, the approximate peculiar smell activity value is added, and the peculiar smell feature of asphalt is evaluated using the approximate peculiar smell activity value addition.The present application can effectively objectively and accurately evaluate the peculiar smell feature of asphalt material by component peculiar smell threshold value, component concentration and approximate peculiar smell activity value addition, and simplifies the peculiar smell feature evaluation of asphalt.

The application relates to the technical field of asphalt materials, and particularly discloses a road paving asphalt filler and a preparation process thereof. The road paving asphalt filler comprises the following components in parts by mass: 3-4 parts of asphalt, 91-99 parts of aggregate, 1-1.3 parts of composite oil and 9-12 parts of composite filler. The composite oil is a compound of wood wax oil, perilla seed oil and pine oil. The preparation process of the road paving asphalt filler comprises the following steps: step 1), heating and mixing the asphalt and the composite oil to obtain a premix; and step 2), adding the aggregate and the composite filler into the premix and uniformly mixing to obtain the road paving asphalt filler. The application has the advantages that the road paving asphalt filler has improved crack resistance at low temperatures.

The application discloses a kind of mixed fiber recycled asphalt mixture and preparation and application thereof, belong to bituminous material technical field, the mixed fiber recycled asphalt mixture, by mass parts, including new aggregate 50~95 parts, asphalt mixture recycling material 5~60 parts, new asphalt 2~5 parts, fiber 0.1~0.5 parts, regenerant 0.01~0.5 parts and penetration type regenerant 0.005~0.05 parts;The penetration type regenerant is the quaternary ammonium salt structure that amino-containing pyridine is obtained by reaction with halogenated alkane through door Shu Er Jintu reaction;Add regenerant and penetration type regenerant and the aging asphalt in asphalt mixture recycling material, make asphaltene in aging asphalt depolymerization, so that aging asphalt is regenerated;Add fiber to enhance the high-temperature performance, water stability and fatigue performance of recycled asphalt mixture.

The invention provides anti-cracking and anti-ultraviolet aging modified asphalt and a preparation method thereof, and belongs to the technical field of asphalt materials. The anti-cracking and anti-ultraviolet aging modified asphalt is prepared from the following raw materials in parts by mass: 100 parts of matrix asphalt, 1-5 parts of a styrene-butadiene-styrene block copolymer, 1-5 parts of aromatic oil, 0.5-0.7 part of an anti-ultraviolet aging agent and 15-21 parts of waste tire rubber powder, wherein the anti-ultraviolet aging agent is selected from one or more of a UV531 ultraviolet light absorber, a UV326 ultraviolet light absorber and a light stabilizer 770. According to the invention, the comprehensive performance of the asphalt material can be effectively improved, especially the ultraviolet aging resistance and crack resistance.