87 results about "Pavement engineering" patented technology

The invention relates to the technical field of airport pavement project quality acceptance, in particular to an airport pavement project quality acceptance method and system based on three-dimensional laser scanning. The method comprises the following steps: firstly, acquiring an original point cloud data model of an airport pavement to be measured by using a three-dimensional laser scanner, and preprocessing data to generate a standardized three-dimensional point cloud model; according to a preset acceptance requirement, processing data required by acceptance by adopting a TIN construction technology, and extracting an average point location elevation and a plane coordinate of an acceptance area to form an elevation point cloud model; and the elevation point cloud model and the three-dimensional point cloud model are intelligently spliced, and a preset evaluation standard is combined, so that the pavement quality is automatically judged. According to the method, the problem of low data processing efficiency in a traditional acceptance method is solved, accurate modeling of a complex pavement structure is realized through a TIN construction technology, and the reliability of an acceptance result is improved; and more efficient and reliable technical support is provided for quality control of airport pavement engineering.

The invention provides a pavement flatness control system and method, electronic equipment and a storage medium, the system is suitable for a paver, and the system comprises a sensor module used for transmitting the collected height value, slope value and fluctuation change value of a pavement to a central control module; the central control module is used for acquiring a first difference value between the height value and the slope value of the road surface and a preset paving thickness reference and a second difference value between the fluctuation change value and a preset flatness threshold value, acquiring a flatness deviation value based on the first difference value and the second difference value, and generating a regulation and control instruction based on the flatness deviation value; and the execution module is used for adjusting parameters of the paver according to the received regulation and control instruction so as to control the flatness of the pavement. According to the paver, the real-time data of the pavement are collected in real time through the sensor module, the parameters of the paver are adjusted in combination with the central control module and the execution module, full-automatic and high-response pavement flatness control is achieved, the construction quality and efficiency are improved, and the harsh standard of pavement engineering is met.

The invention discloses a method for detecting softening resistance, chlorine salt erosion resistance and frost heaving resistance of aggregate, and relates to the field of performance detection of aggregate for pavement engineering, and the method comprises the following steps: obtaining image information of the preprocessed aggregate, carrying out partition processing on the image information by using an image partition processing technology, and obtaining a classification result of the aggregate according to a processing result; carrying out interval sampling on the aggregate based on the classification result, and carrying out identification analysis on the aggregate in combination with a directional tracking algorithm to obtain a grading result of the aggregate; carrying out softening resistance, chlorine salt erosion resistance and frost heaving performance tests on the aggregate, and summarizing the relationship between the aggregate color and the mass loss to obtain the mass loss result of the aggregate; and performing product performance fitting operation on the aggregate to evaluate the aggregate use performance satisfaction degree under the condition of a corresponding quality loss result so as to optimize the aggregate pretreatment process. According to the invention, softening resistance, chlorine salt erosion resistance and frost heaving performance tests are carried out on the aggregate to obtain the mass loss result of the aggregate, and the quality problem can be identified in advance.

The invention relates to the technical field of airfield pavement engineering design, in particular to an airfield pavement unevenness detection method and system, pavement three-dimensional elevation point cloud data capable of accurately reflecting airfield pavement features are quickly acquired by adopting a laser scanning technology, the data acquisition speed and density are greatly improved, and the detection accuracy is improved. Meanwhile, road surface unevenness information is obtained according to the road surface three-dimensional elevation point cloud data and a road surface reference plane, the airport runway is subjected to strip division according to a preset width, the road surface unevenness information in a strip is sampled, the unevenness representative value of each sampling area is calculated, and the unevenness representative value of each sampling area is calculated; the unevenness of the strip is obtained according to the unevenness representative value of each sampling area and the runway unevenness information, the unevenness condition of a key area where an airplane interacts with a runway is reflected more accurately, and the reliability of an unevenness calculation result is improved; in addition, by constructing the airport runway pavement unevenness information base, the unevenness information can be obtained and updated in time.

The present invention relates to the technical field of pavement engineering. Disclosed are a pavement distress detection method and apparatus, a device and a medium. The method comprises: carrying out distress detection on a pavement radar image respectively on the basis of a well-trained large-object detection model and a well-trained small-object detection model, to correspondingly obtain a large-object detection result and a small-object detection result, respectively; and fusing the large-object detection result and the small-object detection result to determine a distress detection result of the pavement radar image, wherein the large-object detection model comprises a deformable convolution layer, a dual-path detection head, and a soft non-maximum suppression operation layer, and the small-object detection model comprises a multi-scale convolutional layer, a deformable ROI pooling layer, a dual-path detection head, a balanced line loss function, and a soft non-maximum suppression operation layer. The structure and corresponding function of a dual-path object detection model are controlled in a targeted manner, and detection results of the two paths are fused, such that the reliability of a final distress detection result is guaranteed.

The invention discloses a method for microwave catalytic regeneration of a waste epoxy asphalt mixture, which comprises the following steps: crushing and screening the waste epoxy asphalt mixture to serve as a main aggregate, mixing the main aggregate with an iron ore aggregate with strong microwave absorption and ferromagnetic powder, adding a hydroxyl-rich or ester-rich polymer, a catalyst for ester exchange reaction and an asphalt regeneration agent, and carrying out microwave catalytic regeneration to obtain the waste epoxy asphalt mixture. And after preheating and microwave catalysis, compacting and molding to realize regeneration of the waste epoxy asphalt mixture. According to the microwave heating regeneration method of the waste epoxy asphalt mixture, the waste epoxy asphalt mixture milled in pavement engineering can be recycled in situ, and resource utilization of the waste epoxy asphalt mixture is achieved.

The invention discloses a graphene asphalt modifier based on a micelle coating technology and a preparation method thereof, and belongs to the technical field of road materials. The modifier is prepared from reduced graphene oxide (rGO) serving as a core function phase, a micelle coating phase (compounded by polystyrene-polyoxyethylene block copolymer and ionic liquid) and an auxiliary modification phase (nano silicon dioxide and a silane coupling agent) according to the mass ratio of 10: (30-50): (5-10). The preparation method comprises the following steps: preparation and reduction of graphene oxide, preparation of an amphiphilic micelle solution, preparation of micelle-coated rGO composite particles and compounding of an auxiliary modified phase. The modifier can significantly improve the dispersibility and compatibility of graphene in asphalt, effectively prevent agglomeration, and synchronously improve the high and low temperature performance, aging resistance, water damage resistance and self-ice-melting performance of asphalt. The process is simple and convenient, is compatible with an existing asphalt production line, and is suitable for high-grade pavement engineering.

The invention discloses a preparation method of a graphene modified asphalt concentrated solution, and belongs to the technical field of road materials. According to the method, the graphene modified asphalt concentrated solution with high dispersity and high stability is prepared through the optimized component formula and the process steps of stripping firstly and stabilizing secondly. The concentrated solution is prepared from graphene, a dispersing agent, a stabilizing agent and carrier oil, and the mass ratio of the graphene is 1%-15%. The preparation method comprises the following steps: performing mechanical stirring and ultrasonic treatment on the graphene in the carrier oil to realize pre-dispersion and stripping; then adding a stabilizer, and performing high-speed shearing to refine and stabilize; and finally, carrying out homogenization treatment to obtain a finished product. The concentrated solution has excellent storage stability, can be quickly and uniformly dispersed in asphalt, is convenient to use and is suitable for different engineering scenes. When the modified asphalt is used for modifying matrix asphalt, the high-temperature stability, low-temperature crack resistance and aging resistance of the asphalt can be remarkably improved, and the modified asphalt is suitable for long-service-life pavement engineering such as high-grade highways and airport runways.

The invention discloses a pavement load analysis method based on discrete elements and a related device, and the method comprises the steps: collecting geometric features and material parameters of an asphalt pavement, and constructing a discrete element model; based on the constructed discrete element model, creating a rigid load plate in the target area, and simulating a tire-road contact surface; a target load is applied through a rigid load plate, displacement field distribution under the action of the load is calculated based on a discrete element model subjected to the load, and settlement response analysis is achieved. The discrete element model of the asphalt pavement is established on a physical scale closer to reality, and interlayer and particle contact conditions are flexibly defined through fine unit division; on the premise of reducing the cost, the transmission path and the distribution characteristic of the dynamic load in an actual pavement structure and the complex internal mechanical response caused by the transmission path and the distribution characteristic can be more accurately captured, and powerful support is provided for comprehensive improvement of scientificity, reliability and precision of pavement engineering design and accurate prediction of pavement diseases.

The invention discloses a coring manipulator for pavement engineering testing, and relates to the technical field of pavement engineering testing, the coring manipulator comprises a cart and a drilling cutter, a support frame is vertically and slidably connected with a moving block, the support frame is rotatably connected with a first lead screw, and the first lead screw is in threaded connection with a rotating cylinder; the side wall of the rotating cylinder is fixedly connected with a first bevel gear and a second bevel gear, the two sides of the first bevel gear are engaged with third bevel gears, the third bevel gears are fixedly connected with second lead screws, the second lead screws are in threaded connection with spiral sleeves, the spiral sleeves are fixedly connected with limiting blocks, and limiting blocks are slidably connected into the moving blocks. The support frame is fixedly connected with a trigger block; the two sides of the cart are slidably connected with first sliding rods, the first sliding rods are in threaded connection with third lead screws, the second bevel gears are meshed with fourth bevel gears, the first sliding rods are slidably connected with second sliding rods, and the second sliding rods are connected with first clamping blocks. The device has the effect of improving the working efficiency and the road core surface quality.

The invention relates to the technical field of intelligent sensing systems, and discloses a method and a device for detecting the bearing capacity of a pavement engineering construction material, and the method comprises the steps: synchronously collecting a mixed signal and a pure noise signal through a main measurement sensor and a reference noise sensor, constructing a multi-dimensional observation matrix, and carrying out the centralization and whitening preprocessing, thereby obtaining the bearing capacity of the pavement engineering construction material. And blind source separation is carried out by adopting an independent component analysis algorithm based on maximized non-Gaussian property, a target bearing capacity response signal with a super Gaussian characteristic is identified according to a kurtosis value of each source signal component, and then a dynamic deformation modulus is calculated. The system comprises a sensor array module, a synchronous acquisition module, a data processing module based on FPGA hardware acceleration and a result output storage module. According to the invention, strong coherent vibration noise can be effectively suppressed, signal details are completely reserved, and high-precision and real-time bearing capacity detection is realized.

The utility model relates to the technical field of road surface drilling, and discloses a road surface engineering drilling device which comprises a base, an opening is formed in the base, a horizontal moving assembly is arranged in the opening, a box body is arranged at the driving end of the horizontal moving assembly, a moving plate is installed in the box body through a lifting driving assembly, and the lifting driving assembly is connected with the moving plate. A movable plate is arranged on the box body, a punching assembly is installed on the movable plate, a dustproof cover is arranged on the periphery of the drilling end of the punching assembly, the box body is further provided with a fixing plate, an air blowing assembly is arranged above the fixing plate, a lifting driving device is arranged below the fixing plate, and an air outlet head is arranged at the driving end of the lifting driving device. According to the device, through the arranged lifting driving device, the air outlet head can be driven to move into the hole to blow broken stones in the hole, subsequent use is prevented from being affected, and the problems that in the prior art, broken stones are left in the hole, and insertion of subsequent rod-shaped objects is affected are solved.

The embodiment of the utility model provides a novel abrader, which relates to the field of airport cement pavement engineering, and comprises a mounting platform, a driving mechanism and a walking wheel group, the mounting platform is used for supporting and positioning a to-be-tested concrete roadbed; the driving mechanism is fixed on the mounting platform; the walking wheel set comprises a mounting frame and a plurality of directional rubber wheels, the mounting frame is connected with the driving mechanism, and the directional rubber wheels are all fixed to the mounting frame and distributed around the preset axis at intervals. The extension line of the wheel shaft of each directional rubber wheel is vertically intersected with a preset axis; and the driving mechanism is used for driving the mounting frame and the directional rubber wheels to rotate around a preset axis. According to the design of the wear meter, the test process can better conform to the real service condition of airport concrete, so that the accuracy and the reliability of a test result are improved.

The application discloses a kind of anti-cracking performance evaluation method and computer equipment for asphalt stress absorbing layer, it is related to pavement engineering technical field, the method includes: stress absorbing layer test piece is carried out oblique shear test, and index information in the process of oblique shear test is collected, the index information includes shear angle, stress load, vertical displacement, lateral displacement, interlayer dislocation displacement and stress absorbing layer adhesion force;According to the index information, the interlayer adhesion coefficient and interlayer stress absorbing coefficient of the stress absorbing layer test piece are calculated;According to the interlayer adhesion coefficient and interlayer stress absorbing coefficient, the anti-cracking performance of the stress absorbing layer test piece is evaluated.The application can introduce the interlayer adhesion coefficient and interlayer stress absorbing coefficient of stress absorbing layer test piece, and accurately evaluate the anti-cracking performance of asphalt stress absorbing layer.

The invention relates to the technical field of pavement engineering, and provides a square invisible drainage ditch edge pavement leveling device and a construction method.The leveling device comprises a support, a leveling device body, a leveling device body and a leveling device body, and the support body comprises a support body, a first vertical frame and a second vertical frame; the electric control lifting mechanism is connected to the bracket main body; the two paving auxiliary modules comprise leveling anchoring parts and grouting cavity forming parts, the leveling anchoring parts are connected to the lower portion of the electric control lifting mechanism through angle conversion structures, and the grouting cavity forming parts are connected to the leveling anchoring parts in a lifting and lockable mode; the leveling anchoring part comprises a leveling adaptive plate used for being supported on the ground on one side of the drainage ditch, the grouting cavity forming part comprises a grouting cavity upper plate parallel to the leveling adaptive plate, a grouting pipe passing hole is formed in the leveling adaptive plate, a grouting hole is formed in the grouting cavity upper plate, and the grouting cavity forming part and the inner side wall of the drainage ditch can define a grouting cavity. A leveling device is paved on the edge of the invisible drainage ditch of the square.

This invention provides a photocatalytically modified asphalt based on waste rubber powder and its preparation method. The modified asphalt achieves this by precisely controlling the ratio of waste rubber powder, matrix asphalt, and a smoke suppressant made of graphite-phase carbon nitride. Simultaneously, a segmented gradient temperature-controlled calcination process is employed to prepare graphite-phase carbon nitride with a specific band gap. This ensures good interfacial compatibility among the raw material components, stable system formulation, and uniform and controllable precursor pyrolysis and polymerization reactions. Consequently, the graphite-phase carbon nitride possesses both porous physical adsorption and visible light photocatalytic activity. This allows for efficient adsorption and long-lasting photocatalytic degradation of asphalt fumes while fully preserving the excellent road performance and workability of the waste rubber powder-modified asphalt. The final product is a photocatalytically modified asphalt with simple components, controllable cost, excellent compatibility, long-lasting and stable smoke suppression effect, good process repeatability, and suitability for industrial mass production and widespread application in highway pavement engineering.

The utility model relates to the technical field of pavement engineering detection experiment devices, in particular to a portable core drilling machine loading and unloading device. Comprising a support of a frame structure and a chain block arranged at the upper end of the support, the support comprises two front stand columns arranged in parallel, two rear stand columns arranged in parallel, a cross beam fixedly connected between the two front stand columns or the two rear stand columns, and longitudinal beams fixedly connected between the front stand columns and the rear stand columns; a telescopic rod capable of stretching out and drawing back downwards is installed on the front stand column, a front walking wheel is installed at the lower end of the telescopic rod, and rear walking wheels are installed at the lower ends of the two rear stand columns. The device is firm in structure and convenient to use, manual carrying is not needed when the concrete coring machine is loaded and unloaded, labor can be saved, personnel safety is guaranteed, the requirement for the height of a transport carriage is not limited to the lifting amplitude of a working platform of the coring machine any more, and adaptability is high.

The utility model discloses an asphalt pavement engineering detection device which comprises a movable seat, two rotating rods are rotatably mounted on the bottom wall of the movable seat, traveling wheels are fixedly mounted at two ends of each rotating rod, detection equipment is fixedly mounted on the movable seat, and marking equipment is fixedly mounted on the movable seat. An L-shaped mounting frame is fixedly mounted on the mounting seat, a second rotating column is rotatably mounted on the L-shaped mounting frame, and a brush is arranged on the second rotating column. In the using process, when the movable base moves, the front side rotating rod rotates to drive the first rotating column to rotate, the first rotating column can drive the second rotating column to rotate on the L-shaped mounting frame through transmission cooperation of the first belt wheel, the second belt wheel and the transmission belt, and therefore the brush is driven to rotate for cleaning; when the moving seat is manually pushed to advance, the brush can be driven to rotate and sweep, no extra motor is needed for driving, and more energy is saved.

The present invention discloses a test device for bleeding performance of semi-flexible pavement, which includes a transparent sleeve, a cross plate, a lower cover, a grille and a pressing rod. The shape of the grille is the same as the cross-section of the inner wall of the sleeve, and the lower cover is detachably connected to the sleeve. It is characterized in that multiple groups of rectangular-shaped clamping holes are longitudinally and parallelly arranged on the upper layer of the outer wall of the sleeve. The bottom of the pressing rod is threadedly connected to the grille. A circular opening is arranged on the outer wall of the sleeve near the bottommost clamping hole, and a water storage device is provided at the bottom of the opening. It can simulate the actual use situation of the slurry, comprehensively consider the fixing and interfering effects of aggregates on the slurry, and the influence of factors such as the dynamic bleeding process on the bleeding characteristics of the slurry, provides a reliable test method for the key indicators of the performance of the semi-flexible pavement slurry, and can effectively improve the quality of pavement engineering.

The invention relates to an AI (artificial intelligence)-based quick highway inspection method and system. The system comprises a mobile device, a camera and a controller, wherein the camera and the controller are arranged on the mobile device; a controller for controlling the mobile device to travel along a target road; the controller is also used for controlling the mobile equipment to carry out civil engineering inspection and greening engineering inspection; civil engineering inspection includes pavement engineering inspection, traffic safety engineering inspection, roadbed engineering inspection, drainage engineering inspection and protection engineering inspection. The controller can control the mobile device to carry out civil engineering inspection and greening engineering inspection. And for the inspection digital image of each inspection project, using artificial intelligence (AI) identification software and machine learning algorithm software of engineering diseases to determine the disease type and area in each inspection project. The inspection efficiency is obviously improved, the inspection accuracy is improved, and the inspection cost is reduced.

The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical field of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness dynamic detection method and relates to the technical filed of airport pavement engineering detection. The application discloses an airport road pavement multi-load coupling impact toughness

The utility model discloses a pavement engineering paving device which comprises a push plate, a cement paste barrel is fixed at the top end of the push plate, a paving discharge port connected with the cement paste barrel is arranged at the bottom end of the push plate, a top cover is arranged at the top end of the cement paste barrel, and a push handle is fixed on one side, opposite to the cement paste barrel, of the top end of the push plate. A limiting connecting mechanism is arranged between the top cover and the cement paste barrel, the surface of the pushing handle is sleeved with a holding anti-skid mechanism, and the limiting connecting mechanism comprises a connecting assembly arranged at the joint of the top cover and the cement paste barrel; through the designed connecting groove, the connecting block, the limiting groove, the limiting buckle and the telescopic spring, accurate limiting connection of the top cover and the cement paste barrel can be achieved, meanwhile, the top cover and the cement paste barrel can be firmly fixed together in cooperation with the designed positioning hole, the screw hole and the positioning screw rod, and compared with the prior art, the top cover and the cement paste barrel are convenient to use. And the opening and closing work of the cement paste barrel is greatly facilitated.

The utility model discloses a detection sampling system for pavement engineering, which comprises a main body piece, a sampling piece and a plurality of positioning pieces, the plurality of positioning pieces can rotate according to the pavement working condition of an operation area, and when the plurality of positioning pieces respectively rotate to different angles and are inserted into the operation area, the stable positioning of the main body piece is formed; the main body piece is effectively prevented from sliding back and forth and left and right, and the situation that the main body piece is driven to move in the vertical direction by the counter-acting force borne by the main body piece when the sampling piece carries out sampling operation is avoided, so that the sampling piece can always carry out sampling operation with the main body piece as a reliable operation basis, the operation reliability is improved, and the sampling efficiency is improved. The detection sampling system is simple in structure and convenient to operate, reduces labor intensity of operators, can adapt to working conditions of pavement engineering through rotation of the positioning part especially in the face of complex working conditions, adaptively performs positioning operation of the whole detection sampling system through reliable positioning points, and is higher in operability.

The invention relates to the technical field of pavement engineering, and discloses an asphalt pavement crack repairing and milling machine. Comprising a vehicle body and a dust cover installed at the front end of the vehicle body, and a first storage box, a second storage box, a third storage box, a stirring box and an air blowing device are further arranged in the vehicle body. A milling cylinder is mounted in the dust cover; and a first conveying belt and a second conveying belt are further arranged behind the milling cylinder. A first discharging port and a second discharging port are formed in the bottom of the vehicle body, and the first discharging port is located in front of the second discharging port. The width of the first discharge port and the width of the second discharge port are the same as the width of the milling cylinder. A first air suction port is further formed in the vehicle body in the dustproof cover, the rear portion of the first air suction port is communicated with a second storage box, and a second air suction port is formed in one side of the second conveying belt and connected with the second storage box. The stirring box is communicated with the first storage box, and the second storage box is connected with the second discharge port. A blowing opening is further formed in one side of the second conveying belt. And the stirring box is communicated with the first storage box and the third storage box. The construction process of highway pavement milling and asphalt filling can be completed, old highway materials can be effectively recycled, the old highway materials and new asphalt materials are mixed to achieve regeneration of the old highway materials, the material utilization rate is increased, and pollution and old highway material loss caused by flying dust in the cutting process are reduced.

The invention belongs to the technical field of pavement engineering materials, and particularly relates to a rubber and plastic composite material preparation process and manufacturing equipment thereof, and the rubber and plastic composite material preparation process comprises the following specific steps: S10, raw material pretreatment: S11, preparation of various raw materials; s12, regenerated plastic treatment: crushing polyethylene regenerated plastic and polypropylene regenerated plastic to 80-100 meshes, putting into an alkali washing tank, soaking with a sodium hydroxide solution to remove surface oil stains and impurities, then washing with clear water to be neutral, and feeding into a drying cylinder; s13, rubber treatment: freezing and crushing butadiene styrene rubber to 50-80 meshes, and adding nano calcium carbonate and an ethylene-vinyl acetate copolymer for premixing; and S14, preparing rubber oil: heating naphthenic rubber oil for later use, and by arranging a middle-section mixing convex edge in the segmented cooling extrusion unit, the regenerated rubber and plastic material interface bonding force is enhanced, and the mechanical property uniformity is improved.

The invention discloses an environment-friendly modified waste refractory material high-performance asphalt mixture as well as a preparation method and application thereof. The mixture is obtained by heating and mixing asphalt, coarse and fine aggregate and a cyclodextrin-fluorosilane double modified waste refractory material. The cyclodextrin-fluorosilane dual-modified waste refractory material is prepared by a three-step method: firstly carrying out amino silanization on the waste refractory material by using (3-aminopropyl) triethoxy silane, then carrying out grafting reaction with gamma-cyclodextrin / epoxy chloropropane, and finally, carrying out end capping by using trifluoropropyl methyl triethoxy silane, so as to obtain the cyclodextrin-fluorosilane dual-modified waste refractory material. And forming a material with a gradient structure of an inner core inorganic framework, a middle cyclodextrin layer and an outer layer fluoroalkyl shell. The use of traditional mineral powder is reduced, and meanwhile, the high-temperature stability, the water immersion stability and the safety of the asphalt mixture are improved. The method is suitable for pavement engineering of expressways and humid and rainy areas, and unification of solid waste high-value utilization and ecological environmental protection is achieved.

The invention relates to the technical field of building materials, and particularly discloses anti-cracking self-leveling mortar and a preparation method thereof. The invention discloses anti-cracking self-leveling mortar, which is specifically prepared from the following ingredients in parts by weight: 10 to 14 parts of cement, 8 to 10 parts of quartz sand, 3 to 5 parts of silica fume, 0.1 to 0.3 part of redispersible latex powder, 0.02 to 0.06 part of water-retaining agents, 0.2 to 0.4 part of flatting agents, 0.4 to 0.8 part of anti-cracking agents and 0.02 to 0.06 part of water reducing agents. The anti-cracking agent is obtained by reacting basalt fiber, terephthalic acid, 1, 4-butanediol, polyether glycol and a catalyst; and the water-retaining agent is obtained by mixing Hydropaat WE 3370 and welan gum. The self-leveling mortar prepared by using the technical scheme of the invention has good flowability, crack resistance and stability, and can be widely applied to pavement engineering with relatively high requirements on crack resistance.

The utility model relates to the technical field of settlement monitoring, in particular to a settlement monitoring device for roadbed and pavement engineering construction, which comprises a sheath, the bottom of the sheath is fixedly connected with a cone plate used for guiding water flow and silt, one side of the cone plate is fixedly communicated with a communicating pipe communicated with an urban sewer system, and the other side of the cone plate is fixedly communicated with a water outlet. The device comprises a sheath, a cone plate is arranged in the sheath, the bottom of the cone plate is provided with a settlement monitoring assembly used for settlement measurement, the settlement monitoring assembly comprises a measuring pipe, and the measuring pipe is movably connected to the inner ring face of the cone plate in a sleeving mode. According to the utility model, the water level is arranged in the water level and is communicated with an urban sewer pipeline through the communicating pipe, so that the silt is brought into a sewer system in the flushing process of rainwater, the situation that the water level needs to be cleaned when measurement personnel carry out measurement is avoided, and the measurement efficiency is improved.

The invention provides a step planing and milling device for pavement engineering and a planing and milling machine, belongs to the field of pavement planing and milling, and aims to solve the problems that a planing and milling machine cannot carry out side surface step planing and milling at a joint of a new road and an old road, so that the joint is poor in bonding quality and easy to damage. Comprising a mounting base, a transverse adjusting unit, a swinging execution unit, a lateral planing and milling head and a spraying unit, through cooperative cooperation of the transverse adjusting unit and the swing executing unit, the position and angle of the lateral milling head in the horizontal direction (transverse direction) and the vertical direction (depth) can be accurately controlled, so that the lateral milling head can stably and regularly mill a step structure on the side face of an old road, and the problems that a traditional milling machine can only mill a whole plane, and the milling efficiency is low are solved. And high-quality joint treatment cannot be completed under special working conditions such as half-range passing and connection of new and old roads.

The present invention discloses a method for detecting the water seepage performance of a highway pavement engineering, belonging to the technical field of highway pavement detection. The pavement to be tested is cleaned so that there are no foreign objects on the pavement to be tested; a closed cofferdam frame is used to cover the cleaned pavement to be tested, and a sealing gasket made of rubber material is fixed to the bottom end surface of the cofferdam frame, and the sealing gasket is vertically pressed on the pavement to be tested; a set amount of water is injected into the cofferdam frame. When injecting water, stop injecting after the amount of injected water reaches the corresponding scale line on the side wall of the cofferdam frame; first stand still for a set time, and then observe whether the decrease of the water level scale line of the cofferdam frame meets the design requirements; pressurize the water in the cofferdam frame. Each time the pressure is increased to the set value, stand still for the set time, and then observe the decrease of the water level scale line of the cofferdam frame. Each time the pressure is increased, the pressure perpendicular to the pavement borne by the sealing gasket increases accordingly. The present invention is easy to detect and operate, can be detected on site, and the data authenticity is higher.