267 results about "Bituminous concrete" patented technology

The invention relates to an asphalt concrete image segmentation system and method based on a gating fusion mechanism. The system comprises a double-branch image acquisition module; a heterogeneous double-branch feature extraction module; a channel space alignment module; a multiple attention module; a gating fusion module; the invention relates to a lightweight high-resolution decoder module. According to the method, local texture features of a material and global semantic features of a structure are extracted based on double branches, cross-modal channel-space dimension matching is realized through a dynamic feature alignment mechanism, bidirectional cross attention interaction is established in combination with multiple attention collaboration, and then bidirectional cross attention features are dynamically fused by using gating weight, so that the cross attention interaction efficiency is improved. Details are recovered through progressive up-sampling; according to the method, the modal suppression phenomenon can be effectively inhibited, the multi-phase material interface segmentation precision is improved, the pixel-level semantic segmentation of the material microstructure is realized while the video memory efficiency is ensured, and the method is suitable for high-precision image analysis of heterogeneous composite materials such as poured asphalt concrete.

The invention belongs to the technical field of water conservancy projects and pumped storage projects, and discloses a layered injection construction method of a micro-stress ECC parting-free hydraulic anti-seepage panel. Aiming at anti-cracking and anti-seepage challenges of a large-scale seamless hydraulic panel, micro-stress high-ductility injection ECC is injected for multiple times in the thickness direction of the micro-stress ECC parting-free hydraulic panel to form a multi-layer composite integral panel, and transverse and longitudinal joints are not arranged; construction cold joints existing in each spraying layer are covered by the subsequent spraying layers, and the construction cold joints of the adjacent spraying layers do not coincide; and the integral micro-stress ECC joint-free hydraulic panel structure is formed by staggering and overlapping. And by means of the crack control design of staggered joint lap joint and twisting-capturing of the ECC layer face, cooperative improvement of structural bearing and crack resistance and seepage resistance is achieved. Compared with a traditional steel-concrete panel and a traditional asphalt concrete panel, the concrete panel has the advantages of being rigid and flexible, high in construction speed, economical, practical, high in deformation adaptability, resistant to void, resistant to freezing, durable and the like, and the problem that a traditional hydraulic panel gives consideration to crack resistance, seepage resistance and safe service is solved.

The utility model discloses a temperature-controllable asphalt concrete non-contact slope flow instrument device, which comprises a temperature control box and an angle adjusting device, the angle adjusting device comprises a bottom support, an adjusting plate and a base, the left end of the adjusting plate is rotatably connected with the bottom support, the base is arranged below the adjusting plate, a sample table is arranged on the upper surface of the base, and the sample table is connected with the temperature control box. The sample table penetrates to the position above the surface of the adjusting plate, a sample is arranged on the sample table, an adjusting screw is arranged on the upper surface of the base and penetrates to the position above the adjusting plate, an adjusting nut is arranged on the adjusting screw, and a heat insulation glass box is arranged on one side of the upper surface of the adjusting plate. A rechargeable battery, an angle display and a laser displacement sensor are arranged in the heat insulation glass box; according to the structure, an independent heat insulation glass box is adopted, a laser hole and a heat insulation film are arranged, and the heat insulation film is used for reducing errors, caused by refraction, of a laser beam penetrating through the high-temperature-resistant heat insulation glass box on the sample placement position and deformation data of the sample.

The invention discloses composite modified bio-based hydraulic asphalt concrete and a preparation method thereof, and belongs to the technical field of hydraulic engineering materials. The concrete is prepared from 8 to 12 parts of asphalt binder, 50 to 65 parts of basalt-quartzite composite coarse aggregate, 20 to 35 parts of machine-made sand-rubber powder fine aggregate, 5 to 10 parts of mineral filler, 0.5 to 3 parts of composite modifier, 0.8 to 1.2 parts of warm mixing agent and 0.5 to 1.5 parts of organosilicon waterproofing agent. Waste vegetable oil is innovatively adopted to be subjected to epoxidation treatment to prepare a bio-based regenerated asphalt plasticizer (the epoxy value is 4.5-6.0%), the bio-based regenerated asphalt plasticizer, nano silicon dioxide and polyester fibers are compounded according to the ratio of (1-3): (2-4): (0.5-1.5) to form a synergistic modification system, and the mixing temperature is reduced by 20-30 DEG C in combination with an alkylamine salt / fatty acid amide warm mixing agent. Through basalt-quartzite (7-9: 1-3) discontinuous grading design and rubber powder (3-8%) elasticity enhancement, the product has high rutting resistance (dynamic stability is greater than or equal to 4200 times / mm), excellent low-temperature crack resistance (bending strain is greater than or equal to 2900 mu epsilon) and environmental protection characteristics, carbon emission is reduced by 60%, the quartzite utilization rate reaches 30%, and the product is suitable for green road engineering construction.

The invention discloses an ultrahigh-precision asphalt concrete pavement paving device and a using method, and belongs to the technical field of asphalt concrete pavement paving. The ultrahigh-precision asphalt concrete pavement paving device comprises a first supporting frame and a second supporting frame, and a driving mechanism is arranged on one side of the first supporting frame; a paving mechanism is arranged on the driving mechanism, a first pressing roller and a second pressing roller are arranged on the baffle, and adjusting mechanisms are arranged at the two ends of the second pressing roller. According to the asphalt concrete paving device, the paving mechanism is driven by the driving mechanism to move in a reciprocating mode, asphalt concrete paving work at different positions can be achieved, the asphalt concrete is preliminarily leveled through the first pressing roller, and the asphalt concrete is further leveled and compacted through the second pressing roller; and the height and position change of the second pressing roller can be detected through a displacement sensor, the paving flatness of the asphalt concrete and the accuracy of the paving thickness can be improved, and it is ensured that the construction requirement is met.

The invention discloses a flue gas treatment device for an asphalt concrete mixer, and belongs to the technical field of asphalt concrete processing, the flue gas treatment device specifically comprises a gas-collecting hood and a bag-type dust collector, the gas-collecting hood is fixedly connected to a flue gas outlet of the mixer, and the gas outlet end of the gas-collecting hood is connected with the gas inlet end of the bag-type dust collector through a spray washer; the bag-type dust collector comprises a shell, a middle filtering cavity is formed in the shell, a sealing plate is fixedly connected to the interior of the middle filtering cavity, a filtering column is fixedly connected to the lower portion of the sealing plate, and filtering cavities are circumferentially distributed on the filtering column; a gas filtering mechanism is arranged in the filtering chamber; by arranging the spray washer and the bag-type dust collector, high-temperature flue gas can be cooled, the bag-type dust collector can filter dust, dust on a dust collection bag can be cleaned without shutdown, the flue gas treatment effect is improved, and the flue gas treatment effect is improved.

The invention relates to the field of water conservancy and hydropower engineering construction, in particular to a reservoir basin water inlet and outlet structure achieving compact arrangement between a side type water inlet and outlet and a backfill concrete layer, the reservoir basin water inlet and outlet structure comprises a reservoir basin and the side type water inlet and outlet, a digging and filling boundary is arranged in the reservoir basin, and the backfill concrete layer is arranged on one side of the digging and filling boundary; the reservoir basin comprises a reservoir basin asphalt concrete panel, the backfill concrete layer is arranged below the reservoir basin asphalt concrete panel, a backfill concrete layer impermeable layer is arranged on the surface of the backfill concrete layer, and the side water inlet and outlet is formed in the backfill concrete layer so that the interior of the reservoir basin can be communicated with the outside. The construction method is particularly suitable for construction of the water inlet and outlet of the reservoir basin.

The invention relates to the technical field of asphalt concrete core wall rock-fill dam construction, in particular to a joint structure of a concrete diaphragm wall and a core wall base and a construction method of the joint structure. The joint structure comprises an anti-seepage wall assembly, a first core wall base and a second core wall base, the bottom of the anti-seepage wall assembly is poured on bedrock, the first core wall base is arranged at the turning position of a bank slope base and a riverbed base and poured on the bedrock, the end of the anti-seepage wall assembly extends into the first core wall base, and the second core wall base is arranged at the top of the anti-seepage wall assembly; a first contact surface, a second contact surface and a third contact surface are arranged between the diaphragm wall assembly and the first core wall base, the first contact surface, the second contact surface and the third contact surface respectively correspond to three adjacent side walls of the diaphragm wall assembly, and protective layers are arranged in the first contact surface, the second contact surface and the third contact surface; a water stop assembly is arranged at the joint of the second core wall base and the anti-seepage wall assembly; the anti-seepage performance of the asphalt concrete core wall rock-fill dam is improved.

The invention relates to a structural design and construction method for improving stress deformation characteristics of an anti-seepage system of an upper face plate dam of a covering layer, which belongs to the technical field of earth and rockfill dam buildings and mainly comprises a step-shaped concrete anti-seepage wall, a Z-shaped connecting plate structure, a toe board, a concrete face plate, a supporting plate, a connecting plate weight, a concrete cushion layer and the like. The method comprises the steps that (1) construction of a main body vertical section and a top step section of the step-shaped concrete diaphragm wall is completed; (2) paving an asphalt concrete cushion layer and an inverted filter layer, and mounting a supporting plate; (3) a base plate, a Z-shaped connecting plate structure, a toe board, a concrete panel and a connecting plate weight are installed; and (4) construction of the flexible water stop seam and the peripheral seam is completed before water storage. According to the invention, the Z-shaped connecting plate structure, the connecting plate weight and the supporting plate are coordinated, so that the shearing and opening deformation of the horizontal anti-seepage system is changed from passive deformation resistance to active deformation control; flexible connection of the anti-seepage system is achieved through cooperative deformation of the flexible water stop seams, the reserved deformation joints and the base plates, deformation coordination of the top step section and the vertical section of the body of the anti-seepage wall is achieved under the action of high reservoir water pressure, the tensile stress of the downstream side of the body of the anti-seepage wall is reduced, and the reliability of the anti-seepage system is improved.

The invention discloses an asphalt concrete structure performance quantitative mapping method fusing multi-source parameters, and particularly relates to the field of road engineering materials, and the method comprises the following steps: S1, selecting asphalt concrete test pieces with uniform gradation and the same cementing material type and compaction mode, and carrying out a loading test by adopting a semicircular bending-tensile test, a UTM test system is combined with a DIC system to obtain mechanical response indexes including a macroscopic peak load Fmax and a microscopic maximum level principal strain Exxmax, and a test piece mechanical property response database is constructed; and S2, performing high-resolution image acquisition on the section of the test piece by using a digital image processing technology, and combining gray enhancement, edge detection and morphological operation. According to the method, the technical problems that structural parameter analysis is isolated, a coupling mechanism between parameters is missing, the prediction modeling capability is insufficient, and performance optimization cannot be performed under a fixed material system can be effectively solved.

The invention belongs to the technical field of asphalt concrete, and relates to modified asphalt concrete for a high-temperature-cold-shock environment and a preparation method of the modified asphalt concrete. The invention provides a preparation method of modified asphalt concrete used in a high temperature-cold shock environment, and the preparation method comprises the following steps: mixing basalt fiber, tannic acid and polyaniline, and stirring at 90-120 DEG C at a rotating speed of 150-300 rpm for 1-3 h to obtain modified basalt fiber; the preparation method comprises the following steps: heating asphalt until the asphalt is softened, adding SBS, and stirring and mixing to prepare SBS modified asphalt; and uniformly mixing the modified basalt fiber, the SBS modified asphalt and aggregate to obtain the modified asphalt concrete. The modified asphalt concrete provided by the invention still keeps relatively excellent mechanical and anti-permeability performances in a high-temperature-cold shock environment, and is suitable for an environment with a large cold and hot temperature difference as hydraulic asphalt concrete.

The invention discloses a movable asphalt concrete waste regeneration treatment device, and relates to the technical field of asphalt concrete waste regeneration, the movable asphalt concrete waste regeneration treatment device comprises a base, the top of the base is provided with a box body, and the box body is internally provided with a storage box; the fixed cylinder is fixed to the top of the base, and a stirring assembly is rotationally arranged in the fixed cylinder; the power assembly is arranged at the top of the fixed cylinder, and the power assembly is used for driving the stirring assembly to work; the backflow assembly is arranged at the bottom of the fixed cylinder, and the backflow assembly communicates with the box body; and the asphalt conveying assembly is arranged on the inner wall of the box body. According to the asphalt concrete waste regeneration device, the stirring assembly can be driven to work through the power assembly, and in the working process of the stirring assembly, the asphalt conveying assembly is driven to work, so that asphalt in the storage box is input into the stirring assembly, the asphalt and waste are mixed, and regeneration of the asphalt concrete waste is achieved.

The invention relates to hydraulic conductive asphalt concrete as well as a preparation method and application thereof. The preparation method comprises the following steps: weighing asphalt, screened mineral aggregate and a conductive material; the screened mineral aggregate is dried and stored; mixing the screened mineral aggregate, the steel slag and the steel fiber in a mixing pot at high temperature; adding asphalt, and continuously heating and mixing; and adding mineral powder and graphite, stirring, and filling the mixture into a mold for molding, thereby completing the preparation of the hydraulic conductive asphalt concrete. The hydraulic conductive asphalt concrete has a better electric heating characteristic, and can be electrified and heated in an extremely low temperature environment in winter to increase the temperature of an asphalt concrete panel and reduce the risk of cracking caused by uneven or too low temperature; the conductive asphalt concrete for the hydraulic engineering can meet the strict anti-seepage and mechanical property requirements in a water retaining building scene of the hydraulic engineering, can be used as an asphalt concrete panel construction material, and can effectively reduce low-temperature shrinkage stress and avoid local stress concentration after being electrified and heated; and a long-term and repeated temperature field adjustment and improvement effect can be achieved.

The invention relates to the technical field of asphalt concrete detection, in particular to an asphalt concrete strength detection device which comprises a press machine, an upper pressing plate and a lower placing table, the protective cover is movably arranged in a base of the press machine; the gas injection mechanism is linked with the protective cover and is driven by the upward movement of the protective cover; the annular air bag is arranged on the periphery of the lower placement table and communicated with the air injection mechanism, automatic centering of the concrete sample is achieved through radial pushing of the annular air bag, and the problem that it is difficult to guarantee that the sample and the pressing plate are strictly coaxial through traditional manual placement is solved; the air bag is completely deflated and shrunk before being pressurized and is separated from the side wall of the sample, so that the interference of lateral supporting force on a detection result is thoroughly eliminated, the phenomenon that the strength value is virtually high due to constraint stress is avoided, and the accuracy and repeatability of the compressive strength test are effectively improved.

The invention discloses an asphalt concrete mixing quality evaluation method based on digital twinning. A power sensor, a three-axis vibration acceleration sensor and an infrared temperature sensor array are arranged at key nodes of a stirring cylinder, and multi-physical field data in the stirring process are collected in real time and mapped to a three-dimensional digital twinborn model. A self-adaptive wavelet threshold algorithm is adopted to carry out noise reduction on power and vibration signals, and a dynamic time warping algorithm is utilized to realize time alignment of multi-source signals. High-dimensional features such as fluctuation variance, power spectral density peak ratio, vibration entropy, temperature variation coefficient and the like are extracted, and significant features are screened through an XGBoost model; the method comprises the following steps: constructing a time sequence evolution rule of a long-short-term memory network capture feature with a time attention mechanism, automatically weighting influence weights of different stirring stages, and finally outputting a comprehensive uniformity index to quantitatively evaluate the stirring quality of asphalt concrete, thereby providing technical support for intelligent production and quality online management and control.

The invention relates to the technical field of asphalt concrete, and discloses an asphalt concrete joint processing flatness detection device, which comprises a plurality of support rods I rotatably connected to the outer walls of a plurality of movable rings, and a plurality of support rods II rotatably connected to the outer walls of a plurality of fixed rings; as the linear speed of the wheels running on the old road surface is larger than that of the wheels on the other side, the centrifugal force borne by the balancing weight on the side is large, the balancing weight is far away from the supporting shaft, when the balancing weight moves, the connecting position of the first supporting rod is driven to be far away from the supporting shaft, and at the moment, the second supporting rod rotates around the connecting position of the second supporting rod and the fixing ring; movement of a movable ring drives a movable rod to get close to a side plate, mutual friction between the movable rod and the side plate is caused, finally, the speed of a supporting shaft is reduced, further, the speed of wheels on the side of the old road surface is reduced under the action of the mechanism, and therefore the situation that friction force is different on the new road surface and the old road surface is reduced. And the influence of the deviation of the detection route on the detection result is avoided.

The invention discloses a method for evaluating performance of recycled aggregate hydraulic asphalt concrete, which comprises the following steps of: determining sample data of four indexes including Marshall stability, Marshall flow value, splitting tensile strength and deformation under maximum force according to Marshall test and splitting test of asphalt concrete with different recycled aggregate substitution rates; establishing an initial evaluation index data matrix, performing homodromous processing on the data to obtain a processed standardized matrix, and calculating to obtain the weight of each index according to a variable coefficient method so as to calculate to obtain a weighted data matrix; carrying out comprehensive evaluation by using a TOPSIS method, calculating to obtain positive and negative ideal solutions, calculating to obtain relative proximity, and evaluating the comprehensive performance of the asphalt concrete under different recycled aggregate substitution rates according to a good and bad order of the relative proximity.

The present invention discloses a connection structure between the foundation gallery and the cutoff wall of an asphalt concrete core rockfill dam, relating to the technical field of water conservancy and hydropower engineering. The structure comprises an upstream rockfill area and a downstream rockfill area; a transition material, a filter material, a high-plasticity clay area, and a dam foundation cover layer are sequentially arranged between the upstream and downstream rockfill areas from top to bottom; a foundation gallery is located within the high-plasticity clay area; the foundation gallery is connected to the dam foundation concrete cutoff wall, which in turn is connected to the asphalt concrete core wall. The present invention provides safe and reliable anti-seepage protection, strong deformation adaptability, a simple design, and ease of construction, making it suitable for connecting the foundation gallery and the cutoff wall of an asphalt concrete core rockfill dam.

The invention belongs to the technical field of bridge construction, and discloses a fabricated bridge expansion device anchoring structure and a construction technology, the fabricated bridge expansion device anchoring structure comprises a first beam body and a second beam body, the first beam body and the second beam body are respectively provided with a mounting groove, the top of each mounting groove is connected with a plurality of connecting pieces, and the outer sides of the plurality of connecting pieces on the same side share an expansion joint structure; the connecting pieces comprise bottom plates and high-strength bolts, the bottom plates are connected with side plates, bolt holes are formed in the bottom plates, steel bar holes are formed in the side plates, transverse steel bars are slidably connected to the inner walls of the steel bar holes, and the first beam body and the second beam body are each provided with a plurality of mounting holes. The connecting pieces are fixedly connected with the corresponding first beam body and second beam body through the mounting holes and high-strength bolts, and the high-strength bolts are in threaded connection with nuts. According to the method, only the thin asphalt concrete surface layer needs to be cut off, the main body structure of the bridge cannot be damaged, mechanical anchoring is conducted through the connecting pieces and the high-strength bolts, and rapid and reliable connection between the expansion joint structure and the bridge structure is achieved.

The present invention discloses an asphalt concrete block crushing device, which relates to the field of concrete recycling technology. The device comprises a base, a crushing piece is fixedly installed on the end of the base, and a protective ring is fixedly installed on one side of the base. The inner wall of the protective ring is clamped with a screening component, and the end of the screening component is connected to the crushing piece. The metal parts in the concrete block are screened out by the screening component. The asphalt concrete block crushing device effectively separates metal from concrete through the screening component, thereby reducing metal pollution and ensuring the purity of the material. At the same time, through magnetic separation, the efficiency of metal recovery can be improved, ensuring that more metal materials are extracted, and further improving the economic value of reuse.

1. The name of this design product: Asphalt concrete testing device. 2. Application of this design product: asphalt concrete testing. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. The rear view is the same as the main view, so the rear view is omitted; the right view is the same as the left view, so the right view is omitted.

The utility model discloses a feeding machine for asphalt concrete production, which comprises a machine body, the inside of the machine body is connected with a fixed block through a lifting mechanism, the fixed block is in sliding connection with a movable plate, and a feeding mechanism is arranged. After a push rod drives a movable plate to slide above a fixed block and a discharging hole in the movable plate coincides with a feeding port above a production device, a second motor drives a lead screw to rotate, so that a transmission belt above the lead screw rotates, and the transmission belt drives the lead screws on the two sides to rotate at the same time; at the moment, a sliding block above a lead screw moves, the sliding block drives a connecting block to be adjusted through a hinge shaft, meanwhile, after the connecting block is adjusted around a supporting rod, the connecting block drives a storage box to be adjusted, at the moment, the angle of the storage box is adjusted, and meanwhile a discharging mechanism is started to discharge materials in the storage box through a discharging port.

There is described a composition for use with aggregate which improves the wetting-out capabilities of bitumen, and therefore the resilience and ageing characteristics of asphalt concrete formed throu

An asphalt concrete production raw material metering device belongs to the technical field of concrete production and comprises a tank body, two containing assemblies are arranged above the tank body, the two containing assemblies are arranged in a bilateral symmetry mode relative to the middle of the tank body, each containing assembly comprises a discharging port communicated with an inner cavity of the tank body, and the discharging ports slidably penetrate through the tank body in the vertical direction. A connecting seat is fixedly mounted on the side wall of the tank body, a transverse plate is fixedly mounted at the top end of the connecting seat, and a vibration assembly is arranged on the transverse plate; the vibration assembly comprises a plurality of spring buffers installed on the upper surface of the transverse plate in the vertical direction, and the spring buffers are connected with the bottom end of the containing assembly. According to the utility model, solid-state raw materials and liquid-state raw materials in the material box can be vibrated, so that the raw materials can be precipitated more tightly, gaps among the solid-state raw materials and bubbles in the liquid-state raw materials are reduced, a measured value is ensured to be more accurate, and further the quality of a final finished product of asphalt concrete is ensured.

The application discloses a steel bridge deck roller compacted asphalt concrete construction simulation method based on BIM, and relates to the technical field of simulation. The method first analyzes the geometric boundary of the BIM model and constructs an adaptive space-time sampling point set; then constructs a deep neural network introducing Fourier feature mapping, maps low-dimensional space-time coordinates into high-dimensional features to capture high-frequency physical changes; then establishes a composite loss function containing heat conduction, thermal coupling and boundary condition residual error, and uses automatic differentiation technology and an adaptive weight algorithm based on gradient statistics for unsupervised training; finally, the trained lightweight model is integrated into the BIM rendering engine. The application solves the problems of long time consumption of traditional finite element simulation calculation, inability of real-time interaction, and poor generalization ability of pure data-driven AI due to lack of internal measured data, and realizes real-time, high-precision dynamic simulation of the temperature field and stress field of the steel bridge deck pavement.

The invention relates to the technical field of asphalt concrete, in particular to thermally recycled asphalt concrete and a preparation method thereof, and the thermally recycled asphalt concrete is prepared from the following raw materials in parts by mass: 20-65 parts of waste asphalt mixture, 35-80 parts of new aggregate, 4.2-5.5 parts of regenerant, 1.8-2.5 parts of new asphalt and 2.5-3.5 parts of mineral powder, the regenerant is a binary nano composite regenerant, the binary nano composite regenerant is composed of a polyester compound and a nano reinforced phase, the polyester compound accounts for 95%-97% of the total mass of the regenerant, and the nano reinforced phase accounts for 3%-5% of the total mass of the regenerant. The binary nano-composite regenerant is adopted, the performance of old asphalt can be effectively recovered, the strength, high-temperature stability and durability of concrete are improved, the preparation method is reasonable in process, it can be guaranteed that all the raw materials are fully mixed, and the product performance is further improved.

The invention relates to the technical field of engineering materials, and provides anti-cracking steel slag asphalt concrete and a preparation method thereof. The anti-cracking steel slag asphalt concrete is prepared from, by weight, 4-6 parts of asphalt, 5-10 parts of filler and 60-70 parts of aggregate, the filler is prepared from, by weight, 20-30 parts of steel slag powder, 20-25 parts of limestone powder, 0.3-0.5 part of polypropylene fiber and 0.3-0.5 part of dispersing agent, and the polypropylene fiber is composed of first polypropylene fiber and second polypropylene fiber. The elastic modulus and the fiber length of the first polypropylene fiber are different from those of the second polypropylene fiber. According to the technical scheme, the problem of insufficient cracking resistance of the steel slag asphalt concrete in related technologies is solved.

The present invention relates to a ballastless track structure, comprising a base bed surface layer composed of asphalt concrete material, a base plate arranged above the base bed surface layer and cast from reinforced concrete material, and a base bed bottom layer composed of graded crushed stone arranged below the base bed surface layer. The structure is characterized in that it also includes a reinforcement unit for strengthening the connection between the base bed surface layer and the base bed bottom layer, the reinforcement unit including fasteners arranged on both sides of the base bed surface layer corresponding to the joint of the two base plate structures, the fasteners being inserted into the base bed bottom layer, and the fasteners being composed of a material having a stiffness greater than that of the asphalt concrete material and the graded crushed stone material.

The invention relates to the use of glass fibre reinforced (GRP) composite pipe waste as filler material in both asphalt concrete and cement based composites. Significant ecological and product performance benefits are provided by using the material produced during the cutting and production processes of GRP pipes in mixtures as filler material by wet or drying and sieving through sieves of desired sizes.

The utility model relates to the technical field of concrete processing equipment, in particular to recycled asphalt concrete hot mixing equipment, which comprises a mixing drum, a gas filtering mechanism and a regenerant spraying mechanism, the gas filtering mechanism comprises a first connecting drum, and the first connecting drum is rotatably connected to the top of the mixing drum. Harmful gas in the mixing drum is sucked into the first connecting drum through the two fans, then the harmful gas is filtered by the filter screen and then discharged from the two air outlet holes, volatile organic compounds generated in the asphalt concrete regeneration process are collected and filtered in time, and environmental pollution is avoided; then the regenerant enters the space between the piston and the first rubber disc, the air cylinder drives the piston to move downwards, the regenerant between the piston and the first rubber disc is pushed into the two spraying pipes, and the regenerant is injected into the stirring barrel through the eight nozzles, so that the regenerant is uniformly dispersed into the material in the stirring process; the regeneration effect of the asphalt concrete is enhanced.