98 results about "Reflective crack" patented technology

The invention relates to the technical field of road crack detection, in particular to a road crack detection method and system based on a fused image. The method comprises the following steps: acquiring road multi-source monitoring data including a visible light image, infrared thermal imaging data and laser radar point cloud data, and performing multi-modal image fusion and road three-dimensional point cloud reconstruction to generate a fused road image and road three-dimensional modeling data; performing crack curvature analysis based on the fused road image to generate crack curvature data; performing reflection crack contour recognition and positioning on the fused road image through the crack curvature data to generate reflection crack initial positioning data; obtaining road base material data; and performing reflection crack stress field reconstruction on the road area according to the reflection crack initial positioning data to obtain a reflection crack stress field. According to the invention, through multi-modal fusion, curvature identification, stress field modeling and crack channel analysis, the accuracy and strain of road reflection crack detection are improved.

The invention provides an asphalt pavement life prediction model establishment method based on environment and load coupling analysis, which comprises the following steps: establishing a three-dimensional finite element model of an asphalt pavement by using Abaqus software, simulating dynamic response of a pavement structure under the action of moving load and temperature, and obtaining the maximum tensile strain value of the bottom of each layer of an asphalt surface layer; in combination with a temperature correction coefficient, a humidity correction coefficient and a thickness correction coefficient, the model is corrected to improve the prediction precision; simulating the expansion process of the reflection crack under the load action by adopting an expansion finite element method, and calculating a composite stress intensity factor and the influence of the composite stress intensity factor on crack expansion; referring to a Paris formula, introducing an equivalent crack damage rate, and constructing a service life prediction model considering the damage of crack propagation to the pavement structure; influences of temperature, humidity, load, asphalt layer overall strain accumulation, pavement structure layer thickness and reflection cracks are comprehensively considered, and an asphalt pavement life prediction model based on finite elements is established and used for accurately predicting the service life of an asphalt pavement.

The invention discloses a white and black pavement structure exterior and interior disease one-key plotting method oriented to pavement health management, and relates to the technical field of road engineering detection and maintenance. Reflection crack tracing is realized based on an interlayer disease conduction rule by establishing a cement board joint coordinate system; the method comprises the following steps: determining the types of broken slabs and slab corner fractures by utilizing the spatial geometrical relationship between cracks and joints, calculating indexes such as a load transfer coefficient, a reflection crack rate, a slab breakage rate and a pavement condition index, and generating a visual result containing disease distribution and performance parameters in a linkage manner. According to the method, the traditional single structure layer analysis limitation is broken through, the reflection crack recognition accuracy rate exceeds 92%, the broken plate judgment accuracy rate reaches 94% or above, the batch data processing time complexity is optimized to O (n + m), the single road section analysis time is shortened to be within 5 minutes from 2 hours, the problems of low manual detection efficiency, large errors and the like are effectively solved, and quantitative support is provided for precise maintenance of white and black pavements.

The invention belongs to the technical field of highway bridge and culvert engineering, and discloses a multi-span hole assembly type cover plate small bridge and culvert structure construction method which is characterized in that side walls, middle walls and cover plates are transported to a construction site to be assembled after being prefabricated, so that site formwork erecting work is effectively reduced, the construction process is simplified, and the construction efficiency is improved; the connection strength and the structural stability are improved through a grouting method, and then the problem of insufficient grouting of a bedding method is further solved through a secondary grouting method; the pre-embedded steel bar groups of the adjacent cover plates are welded and connected, and by utilizing an equivalent load preloading pre-deformation method in advance, cast-in-place connection areas can bear more uniform stress distribution after being fixedly connected, the stress state in the service stage tends to be more balanced, the crack initiation risk is reduced, and the overall stability and durability of the structure are improved; rigid connection is formed between the adjacent cover plates and the middle wall, the risks of cover plate damage, slab staggering and reflection cracks caused by displacement or looseness of the abutted seam are reduced, and the structural safety and the service life of the bridge and culvert are guaranteed.

The invention provides a self-adhesive pavement local disease repair blanket and a preparation process and application thereof, the repair blanket is of a rectangular sheet structure, and sequentially comprises an anti-wearing layer, a high-viscosity tough asphalt layer, a self-healing composite structure layer, an anti-crack reinforcing layer and a self-healing bonding layer from top to bottom. The self-healing composite structure layer is composed of a crack limiting induction film layer and a shape memory polyurethane strip. Through the collaborative design of introducing the anti-crack reinforcing layer and the high-viscosity and tough asphalt layer into the repairing blanket structure, the stress fluctuation transmitted by base cracks can be effectively buffered, and the stress concentration degree of the surface layer is reduced, so that the occurrence of reflection cracks is inhibited, and the structural integrity of a pavement repairing area is improved; a self-adhesive composite structure which can be used at normal temperature is adopted, traditional operation steps such as heating, mixing or sealing layer laying are not needed in the construction process, the construction process is simplified, and the maintenance time is shortened.

The invention provides an optimization design method of a fiber rubber gravel seal layer for inhibiting pavement reflection cracks. The optimization design method comprises the following steps: determining optimal fibers; determining an optimal aggregate; preparing a plurality of groups of third test pieces by taking the optimal fiber dosage, the optimal aggregate spreading amount and the optimal rubber asphalt dosage as variables through an orthogonal test; and combining the third test piece with the base layer with the crack and the overlay layer, preparing a fourth test piece, carrying out a reflection crack simulation test, and determining the combination of the material with the optimal crack resistance according to the test result. The method takes the reflection crack resistance of the fiber rubber asphalt macadam seal as a main evaluation index, and has the advantages of scientificity, reasonability and accuracy compared with the prior art. The fiber rubber gravel sealing layer obtained through the design method has excellent reflection crack resistance, the crack resistance of the composite pavement can be remarkably improved, the pavement maintenance and repair cost can be reduced, the pavement service cycle can be prolonged, and the fiber rubber gravel sealing layer has wide popularization and application prospects.

The present application relates to a kind of anti-cracking building solid waste road flexible base mixture and its preparation method, base mixture includes building solid waste mixed aggregate, pitch, mineral powder;Building solid waste mixed aggregate is composed of broken concrete aggregate, broken brick, broken ceramic, broken glass, the mass ratio of broken concrete aggregate, broken ceramic, broken glass in the coarse aggregate of building solid waste mixed aggregate is (68-74):(23-29):(0.1-0.6);Pitch is heavy intersection 70 # matrix asphalt or 90 # matrix asphalt any one or combination thereof;Mineral powder is limestone mineral powder with 90%-100% purity, particle diameter is 0.8um-12um.The present application can reduce the crack of road base caused by temperature shrinkage and dry shrinkage on one hand, effectively prevent the phenomenon that base layer cracking leads to surface layer reflection crack;On the other hand, building solid waste is applied to road base, not only reduces material cost, saves natural mineral resources, but also can protect ecology, solve environmental pollution and other problems, with obvious environmental benefits, economic benefits and social benefits.

The utility model discloses an ultra-high-performance cement-based thin overlay anti-crack structure which comprises a thin overlay additionally laid on an old cement concrete pavement, and the thin overlay is made of ultra-high-performance concrete. The crack isolating layer is paved on the pavement crack in advance and is positioned below the thin overlay; uHPC (Ultra-High Performance Concrete) and crack isolation are adopted as an anti-crack structure of a thin overlay, and the pavement slotting (slotting along the full length or local part of the crack) or / and the crack isolation layer are / is adopted to adapt to the shrinkage and expansion of the concrete, so that the expansion of the reflection crack is prevented, and the anti-crack performance of the thin overlay is improved. And meanwhile, pavement slotting is beneficial to avoiding buckling instability damage of the UHPC thin overlay and bonding failure of an interlayer interface caused by expansion of adjacent plates at the cracking part of the old pavement. By means of the structure, the thin overlay has good stability, crack resistance and durability, and the problems of buckling and disengaging of the thin overlay and early fracture, fatigue failure and the like under the heavy load effect can be effectively solved.

This invention provides a construction method for improving the drainage capacity of road structures, relating to the field of drainage function technology for the renovation and upgrading of old roads. It separates water bodies between the upper and lower structural layers and the original ground surfaces on both sides of the road structure layer by forming an emulsified asphalt layer and waterproof geotextile. A rapid drainage structure is formed using a concrete pavement crushed stone layer, filled with crushed stone, drainage geogrids, sidewalk rubble, a filter layer, and drainage pipes. This achieves rapid drainage of the road structure, ensuring the stability of the road structure layer in the renovation of old pavements, reducing differential settlement caused by groundwater and other factors, and avoiding disturbance to the road and the resulting reflective cracks. This invention improves the drainage performance at the junction of sidewalks and roads, reducing water disturbance problems.

The invention provides a channel of a pre-embedded line pipe and a dry-method sealing construction method of the channel, and belongs to the technical field of building construction. The embedded wire pipe comprises an inverted-T-shaped channel which is formed in a wall base layer and used for providing an installation space for the embedded wire pipe; the caulking rock wool strips are used for filling gaps between the line pipes and gaps between the line pipes and the wall body; the plugging rock wool board is applied to the outer side of the caulking rock wool strip and completely fills the U-shaped channel; the non-cured asphalt layers are painted on the expanded grooves in the two sides of the U-shaped channel; and the cement pressure plate cover plate is used for covering the inverted-T-shaped channel, is levelly aligned with the wall base layers on the two sides and serves as a final covering layer for closing the inverted-T-shaped channel. According to the method, surface layer reflection cracks caused by the fact that cement mortar or fine aggregate concrete is adopted to seal the line pipe groove due to the fact that a filling material is prone to water loss and shrinkage and not prone to being filled densely and different materials are different in temperature shrinkage can be effectively avoided, and meanwhile the sound insulation performance of the line groove is guaranteed by filling the caulking rock wool strips and blocking the rock wool board.

The invention relates to the technical field of road engineering, and discloses an old road composite disease layered repair and asphalt paving integrated process which comprises the following steps: carrying out layered targeted repair on old road diseases; carrying out synergistic enhancement treatment on a repair interface, namely arranging a high-elasticity polyurethane and asphalt stress absorption layer at a construction joint of the new and old plates, and carrying out mechanical micro grooving on the surface of a grouting area; evaluating a representative deflection value of the repaired pavement by using a drop weight deflectometer, and dynamically matching an asphalt paving structure scheme; after the glass fiber grating is laid, the matching scheme is executed. According to the composite pavement structure disclosed by the invention, a synergistic enhancement interface comprising the stress absorption layer and the micro-carving grooves is arranged between the repaired base layer and the asphalt surface layer. According to the method, the quantitative feedback relationship between the repairing effect and the paving design is established, and the systematicness and accuracy of the repairing project are improved by cooperatively enhancing the interface to inhibit the reflection crack.

The invention discloses a few-crack durable first-grade highway pavement structure suitable for a seasonal frozen region, and belongs to the technical field of highway engineering. Comprising an upper surface layer, a middle surface layer, a stress absorption layer, a first cement stabilized macadam double-layer base layer, a second cement stabilized macadam double-layer base layer, a macadam hardcore and a roadbed. However, interlayer tensile strain is concentrated, base layer air shrinkage and reflection cracks are difficult to effectively restrain, and interlayer weakening is easily caused by construction and operation temperature gradient. And the problem that structural forms and parameter ranges considering crack resistance, rut resistance and water stability are incomplete under the conditions of cold weather and large traffic load due to the lack of a system solution of pavement layer combination, stress absorption and construction window coordination in a seasonal frozen area is solved.

The invention discloses a water-based polymer emulsion stabilized fiber aeolian sand macadam base material and a preparation method, and belongs to the technical field of pavement building materials, the water-based polymer emulsion stabilized fiber aeolian sand macadam base material comprises a base material, a water-based polymer and basalt fiber; the base material comprises the following components in percentage by mass: 60-70% of graded broken stone; 30% to 40% of aeolian sand; by taking the mass of the base material as a standard, the coating also comprises 0.4-1% of water-based polymer emulsion; 1%-2% of basalt fiber; the water-based polymer emulsion stabilized fiber aeolian sand macadam base material has good mechanical properties, stability and durability, solves the problems of reflection cracks, ruts and other diseases of a traditional semi-rigid base, and prolongs the service life of a pavement.

The utility model discloses an anti-reflection crack structure of a white and black road pavement. The anti-reflection crack structure comprises a concrete layer, a double-twisted reinforced steel wire mesh, a bonding layer, a stone chip layer and a first asphalt layer which are sequentially arranged from bottom to top. According to the utility model, the pavements are paved through the twisted-pair reinforced steel wire meshes, and uneven stress caused by a load effect is transmitted to the twisted-pair reinforced steel wire meshes, so that the effects of buffering, counteracting and reducing the uneven stress are achieved, the overall stress is uniform, the integrity is enhanced, and the service life of the pavement is prolonged. Spreading of the stone chips generates the effect similar to concrete surface scabbling, the integrality among the concrete layer, the double-twisted reinforced steel wire mesh and the first asphalt layer is enhanced, and therefore block sliding and cracking caused by the horizontal acting force of the road surface can be avoided.

The invention provides an asphalt overlay material and a preparation method thereof. The asphalt overlay material comprises the following raw materials in parts by mass: 12-18 parts of high-viscosity and high-elasticity modified asphalt, 75-82 parts of aggregate and 0.5-2 parts of an additive, the dynamic viscosity of the high-viscosity and high-elasticity modified asphalt at 60 DEG C is 300,000-500,000 Pas, the ductility at 5 DEG C is 35-45 cm, and the elasticity recovery at 25 DEG C is greater than or equal to 95%; intermittent grading is adopted in the aggregate, and the additives are an anti-stripping agent and a warm mixing agent. The material is suitable for 1.0-1.5 cm ultra-thin overlay engineering, the reflection crack fatigue life is larger than or equal to 1200 times of circulation, the dynamic stability at 60 DEG C is larger than or equal to 4300 times / mm, the low-temperature flexural-tensile strain at-10 DEG C is larger than or equal to 3500 [mu] m, reflection cracks can be effectively inhibited, the service life of a pavement can be effectively prolonged, construction is efficient and energy-saving, and the material is suitable for various scenes such as a dry area, a wet area, a seasonal freezing area and heavy traffic.

The invention discloses a pavement crack treatment auxiliary decision-making method based on pavement surface-interior cooperative detection. According to the method, road surface and internal data are synchronously collected through integrated equipment, cracks are accurately positioned by adopting a pixel-level longitude and latitude mapping method based on spherical geometry, and a dynamic threshold model fusing multi-dimensional information such as road service life, traffic load, climate and maintenance history is constructed. The relevance between the road surface and the internal crack is scientifically judged, and the road surface and the internal crack are accurately divided into a fatigue crack, a reflection crack and a through crack. On the basis, according to the method, the road condition is evaluated through the quantitative evaluation index S, and a targeted treatment scheme is formed in combination with the crack type and number, so that the problem of improper or incomplete treatment caused by inaccurate judgment in traditional maintenance is effectively solved, and the treatment effect is remarkably improved.

The invention relates to a liquid supplementing and slurry extracting construction process based on a graded broken stone structure and application of the liquid supplementing and slurry extracting construction process, and belongs to the technical field of road engineering. The process provided by the invention is suitable for transforming a low-grade cement road into an asphalt pavement under medium and light traffic volume, adopts an embedded compact grading design, adopts a plant mixing method to mix graded broken stones, and adopts a liquid supplementing and slurry extracting process to improve the modulus of a graded broken stone layer, so that the upward development of reflection cracks can be effectively inhibited and delayed, and the pavement quality is improved. And in addition, the construction cost of the reconstruction scheme is low, the reconstruction speed is high, and the construction period is short.

The present invention relates to epoxy asphalt modified concrete (EAMC)bituminous overlays on rigid and flexible pavements for road construction and maintenance. The pavement structure (100 A and 100 B) with an overlay of an epoxy asphalt (102 A and 102B), in accordance with an embodiment of the present invention. In an embodiment, EAMC overlays system over the Rigid Pavement- The Pavement structure (100 B) with an overlay of an epoxy asphalt modified concrete (102B) over the rigid pavement, in accordance with an embodiment of the present invention. The pavement structure includes a first layer (106) of a tack coat sprayed on a surface of an existing pavement structure (104A), a third layer (110) of reflective crack relief interlayer (RCRI) sandwiched between a second layer of a first paving fabrics provided over the first layer and a fourth layer (112) of a second paving fabrics (108) provided over the third layer such that the third layer is provided over second layer, and a fifth layer (114) of a binder having a combination of an epoxy, asphalt and a bitumen provided over the fourth layer, wherein the fifth layer operates as a top surface of the pavement structure on rigid pavements. In another embodiment, EAMC overlays system over the Flexible Pavement, the Pavement structure (100 A) with an overlay of an epoxy asphalt modified concrete (102A) over the flexible pavement, in accordance with an embodiment of the present invention. This includes a first layer (112) of Glass fibre Geo grid (self-adhesive backing / tack coat) surface of an existing pavement structure (104 A); and a second layer (114) of a binder having combination of an epoxy, asphalt and a bitumen provided over the first layer, wherein the second layer operates as a top surface of the pavement structure.

The utility model discloses a base section construction joint road structure for preventing reflection crack, which comprises two sections of base layers and high-strength cement blocks, the high-strength cement blocks are arranged between the two sections of base layers, the inner sides of the two sections of base layers are provided with base grooves, the inner sides of the base grooves are provided with rectangular grooves, the inner sides of the rectangular grooves are provided with steel support plates, and the steel support plates are provided with grooves. The utility model discloses a glass fiber net structure, it is equipped with high-strength cement block, the reinforcing subassembly is equipped with the high-strength cement block, the reinforcing subassembly is used for reinforcing the junction of two sections of base course, the reinforcing subassembly includes high-strength complete plate, even if the glass fiber net is damaged, when the junction outside the base course suffers from big extrusion, through the high-strength complete plate support, the base course will not be damaged, and the base course will not be damaged. The high-strength complete plate is of a high-strength complete structure and replaces base layer mortar to be installed at the joint of the two base layers, so that the situation of reflection cracks is effectively avoided, the high-strength complete plate is supported through the steel supporting plate, and the situation that the high-strength complete plate is extruded and inclines is avoided.

The invention relates to the technical field of road engineering, in particular to a method and system for predicting the service life of a semi-rigid base pavement structure, and the method comprises the steps: obtaining crack related data of a target pavement and operation data reflecting the service conditions of the pavement; based on the crack related data, crack state parameters used for representing the reflection crack development state in the target pavement are determined; based on the crack state parameters and the operation data, a prediction model of the crack development state changing along with the pavement service condition is established; and setting an end-of-life criterion corresponding to the crack state parameter, and when a prediction result of the prediction model meets the end-of-life criterion, determining the structural service life of the target pavement. According to the invention, the problems of low crack development prediction precision and incapability of dynamically adapting to the change of service conditions in the prior art are effectively solved, and the accuracy and adaptability of pavement life prediction are remarkably improved.

This invention relates to the field of road surface settlement prevention technology and discloses a method for preventing settlement of the road surface at the edge of a basement. This method includes the following steps: First, the excavated surface of the basement is backfilled and compacted in layers until the compaction degree meets the design requirements; after backfilling the excavated surface to a suitable position at the top of the basement, a 20cm thick C30 reinforced concrete anti-settlement slab is constructed; after the anti-settlement slab is poured and cured, a 2m wide geogrid is symmetrically laid along its edges to prevent reflective cracking at the joints. This method for preventing settlement of the road surface at the edge of a basement can effectively solve the problem of uneven settlement of the road surface around the basement in residential areas. In addition, this method can reduce the impact of vehicle impact loads on the basement exterior walls, ensure the strength, rigidity, and stability of the roadbed, improve the bearing capacity of the roadbed and pavement, and fully guarantee the design service life of the road.

The invention belongs to the technical field of road engineering maintenance, and particularly relates to a treatment method for heavy traffic road pavement reflection cracks. According to the method, accurate targeted repair is achieved in the mode that the discrete milling areas are arranged along the crack at intervals, whole-line milling is avoided, and the construction cost is effectively saved. A grouting pipe penetrating into a base layer is used for grouting, a middle-layer macroporous asphalt mixture stress absorption layer and a surface-layer asphalt mortar functional layer are combined, and a crack source for anchoring a crack from the bottom and adopting a high-strength slurry anchor cable is constructed; stress is eliminated in the middle, the stress of the pavement is absorbed by adopting a flexible material, and capillary water is prevented from rising; moisture is isolated at the top, and high-viscosity asphalt is adopted for complete sealing to prevent moisture from invading; therefore, the propagation path of the reflection crack is fundamentally blocked.

The utility model discloses a multifunctional durable pavement structure with a polymer reactive base layer. A high-viscosity drainage asphalt concrete upper surface layer, a first asphalt waterproof bonding layer, a high-performance asphalt concrete middle surface layer, a second asphalt waterproof bonding layer, a modified asphalt concrete lower surface layer, a high-performance waterproof bonding layer, an asphalt stabilized macadam upper base layer, a high-shear-strength graded macadam lower base layer and a cement stabilized macadam upper subbase layer are sequentially arranged from top to bottom. A cement stabilized macadam lower subbase layer, a graded macadam layer and a roadbed; and the high-shear-strength graded broken stone lower base layer is a high-performance polymer HPM cemented graded broken stone base layer. Layered structures in the pavement structure are selected, and various different layered structures are matched with one another, so that the problem of reflection cracks generally existing in a semi-rigid base layer can be effectively solved, the durability of the pavement is improved, and the service life of the pavement is prolonged.

This invention relates to the technical field of road engineering, and in particular to a method for converting old road structures into long-life pavement structures based on low-carbon cold recycling, comprising the following steps: S1, milling and recycling of the old pavement layer; S2, conversion of the semi-rigid base course system by vibratory compaction using a road roller to convert the semi-rigid base course into a granular flexible subbase course; S3, injection of a semi-flexible isolation layer; injection of a highly permeable slurry into the crushed base course to form a flexible recycled isolation layer; S4, forming of the flexible recycled base course; uniformly spreading a mixture of milled recycled material and new aggregate on the isolation layer, and simultaneously spraying and injecting bio-based modified emulsified asphalt; S5, laying of a low-carbon surface layer; spraying a modified emulsified asphalt tack coat onto the surface of the flexible recycled base course, followed by spreading a rubber asphalt concrete surface layer, and finally compacting it. The construction method of this invention solves the problems of "high carbon emissions, rapid recurrence of reflective cracks, and short lifespan" in traditional old road reconstruction and expansion.

The invention relates to the technical field of road and bridge construction, in particular to a semi-rigid base layer reflection crack targeted inhibition structure and a construction method thereof.The semi-rigid base layer reflection crack targeted inhibition structure comprises a semi-rigid base layer, a lower face layer, a fiber resin composite crack-resisting interlayer, a middle face layer and an upper face layer from bottom to top; the adjacent kerf sections are separated by a retaining section, and stress dissipation holes are formed in the starting and ending end points and the corners of each pre-kerf; a composite crack pouring body is filled in the composite crack pouring body and is composed of a sealing reinforcing layer and a deformation core layer. A flexible deformation joint which is overlapped with the projection area of the broken-line-shaped kerf in the semi-rigid base layer in the vertical direction is arranged in the lower surface layer, and the flexible deformation joint is filled with a fiber reinforced asphalt mixture; the fiber resin composite crack-resistant interlayer is of a strip-shaped structure which is arranged between the lower surface layer and the middle surface layer and right faces the area above the flexible deformation joint. The problems of generation and upward expansion of reflection cracks in the pavement are solved, and active targeted inhibition is realized.

The utility model discloses a cement pavement reconstruction and expansion pavement structure capable of resisting reflection cracks, which belongs to the technical field of pavement structures and comprises a bottom layer, an upper layer and a lower layer. The flexible base layer comprises a water-based-organic polymer stabilized macadam layer laid on the old road structure layer, and tack coat oil is laid between the water-based-organic polymer stabilized macadam layer and the old road structure layer; the upper layer comprises an asphalt surface layer, and the asphalt surface layer is laid on the water-based-organic polymer stabilized macadam layer. According to the utility model, the bearing capacity and anti-rutting capacity of the reconstructed and expanded road structure can be ensured, the reflection crack resistance of the pavement structure is improved, the thickness of the asphalt surface layer can be effectively reduced, the asphalt consumption is reduced, and good economic benefits and environmental protection benefits are achieved.

The invention relates to a high-performance ordinary asphalt mixture and a preparation method thereof. The high-performance ordinary asphalt mixture comprises the following raw materials: 50-76% of basalt coarse aggregate, 19-40% of basalt fine aggregate, 4-6% of asphalt-aggregate ratio of asphalt cement and 5-10% of filler doped with carbonized steel slag powder. Wherein the filler doped with the carbonized steel slag powder is composed of the carbonized steel slag powder and common limestone mineral powder, and the weight of the carbonized steel slag powder accounts for 20%-100% of the total weight of the filler; the preparation method comprises the following steps: grinding steel slag coarse particles into powder, carbonizing, and mixing and stirring with common limestone mineral powder to obtain the filler; basalt is crushed and screened to serve as aggregate, the aggregate is mixed with 70 # matrix asphalt preheated to be in a molten state and filler doped with carbonized steel slag powder at the temperature of 155-165 DEG C, and the high-performance ordinary asphalt mixture is obtained. The environment-friendly pavement brick has excellent high-temperature stability, low-temperature crack resistance, water stability and reflection crack resistance, and is low in economic cost, simple and convenient to construct, environment-friendly and good in pavement performance.

The application discloses a cement pavement "white to black" long-life epoxy asphalt thin-layer overlay and a construction method thereof. The epoxy asphalt thin-layer overlay structure is sequentially composed of a modified emulsified asphalt bonding layer, a 2cm AC-5 rich-oil modified asphalt mixture stress absorption layer and a 4cm AC-13 high-toughness plastic epoxy asphalt mixture surface layer from bottom to top. The core lies in that high-toughness plastic epoxy modified asphalt is used as a binder, which has excellent flexibility and strength. The structure can effectively reduce more than 50% of reflection cracks, and the road performance of the surface mixture is improved by more than 50% compared with ordinary asphalt mixture. The application realizes a total overlay thickness of only 6cm, reduces initial investment and material consumption, improves the durability of the pavement, prolongs the design service life by more than 50%, and solves the technical problems of thick overlay, easy damage and short service life in traditional "white to black" technology.

The present invention belongs to the technical field of composite pavement structures, and specifically relates to the application of a multi-layer composite reinforcement material and its preparation method in the prevention and treatment of reflective cracks in widened roadbeds. The multi-layer composite reinforcement material comprises, from bottom to top, a stress absorption layer, an adhesive layer, and an asphalt concrete layer. The present invention selects specific raw materials so that each layer of material has specific stress absorption and dispersion capabilities, and through a specific preparation process, these layered materials are tightly combined together to form a composite reinforcement material with excellent crack resistance. It has excellent stress absorption, dispersion and bonding effects, can effectively alleviate stress concentration caused by roadbed deformation, reduce the occurrence of reflective cracks, and significantly improve the overall stability and crack resistance of the road structure, and is very suitable for the prevention and treatment of reflective cracks in widened roadbeds.

This utility model relates to the field of road paving technology and discloses a quick-release paver anti-segregation rubber baffle, including a rubber plate. Rectangular and L-shaped iron plates are respectively arranged on both sides of the rubber plate. Multiple iron chains are arranged at the bottom of the L-shaped iron plate. Multiple rubber fixing bolts, connecting bolt one, and connecting bolt two are threadedly connected inside the rectangular iron plate. One end of each of the multiple rubber fixing bolts extends through the interior of the rubber plate, and one end of each of the multiple connecting bolt two extends through the rubber plate and into the interior of the L-shaped iron plate. Multiple U-shaped buckles are arranged at the bottom of the L-shaped iron plate. In this utility model, the modular rubber plate and iron chains work together to adapt to the needs of different road conditions and are compatible with different gradations of water-stabilized mixtures. This significantly improves the smoothness and uniformity of the water-stabilized layer paving, reduces the risk of later reflective cracking, and simultaneously reduces material waste and the probability of rework.