800 results about "Asphalt concrete" patented technology

Methods, apparatus, and storage medium for providing real-time asphalt density and / or moisture content prediction with ground penetrating radar. A method includes using raw data from a ground penetrating radar sensing an asphalt concrete at a location; processing the raw data to obtain processed data; determining an asphalt density of the asphalt concrete at the location based on the processed data according to an asphalt density prediction model; determining a compaction status of the asphalt concrete at the location based on the asphalt density and a target compaction threshold; and outputting the compaction status of the asphalt concrete at the location to an operator for determining whether to continue or stop compacting the asphalt concrete at the location. In another method, moisture content for cold recycling and existing asphalt concrete pavement is predicted in real-time from using raw from data of ground penetrating radar mounted on a vehicle.

The utility model discloses an asphalt concrete fluidity detection device which comprises a bottom frame, one side surface of the bottom frame is fixedly connected with an integrated control box, one side surface of the integrated control box is movably connected with a limiting assembly, and the upper end of the limiting assembly is provided with a detection assembly. According to the utility model, the material carrying cylinder is placed in the placing groove of the bottom frame, and the sliding plate is lifted and pressed to the upper end of the material carrying cylinder, so that the three main frameworks are tightly buckled in the three positioning clamping grooves, and the three auxiliary frameworks are tightly buckled in the three positioning clamping grooves; the surface of one side of the connecting ring is attached to the surface of one side of the material loading barrel, the detection main rod is limited by the limiting ring and the limiting ball, it is ensured that the drop hammer vertically falls, a more accurate mobility test result is obtained, system errors and random errors caused by deviation are integrally reduced, and the detection accuracy is improved. The resistance applied to the asphalt mixture is uniform and consistent when the asphalt mixture passes through the asphalt mixture, so that the fluidity of the mixture is reflected more accurately.

The invention relates to the field of road building materials, and particularly discloses recycled asphalt concrete and a preparation method thereof, and the recycled asphalt concrete comprises the following raw materials: a waste asphalt mixture, matrix asphalt, aggregate, mineral powder, hydroxyl modified polyester fibers, a polymer composite modifier, modified nano silicon dioxide and a regenerant; the preparation method comprises the following steps: preheating the waste asphalt mixture; mixing and preheating the aggregate and the mineral powder; preheating matrix asphalt and mixing the matrix asphalt with the preheated aggregate to prepare a primary mixture; preheating a regenerant, mixing with the primary mixture, and then mixing and stirring with the preheated waste asphalt mixture to obtain a mixture; mixing the hydroxyl modified polyester fiber, the polymer composite modifier and the modified nano silicon dioxide, and then stirring and mixing with the mixture to prepare the recycled asphalt concrete. The method has the characteristics that the later cracking problem of the recycled asphalt concrete is relieved, and the durability of the recycled asphalt concrete is improved.

The invention relates to the technical field of bridge pavement, in particular to a concrete bridge anti-crack bridge deck pavement structure and a pavement method. A high-elasticity modified asphalt mastic macadam concrete upper surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a fiber high-strength dense water asphalt concrete lower surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a high-toughness asphalt sand stress absorbing layer, a fiber waterborne epoxy anti-cracking waterproof bonding layer and a C50 fiber concrete anti-freezing and anti-cracking layer are sequentially arranged from top to bottom. The durability of the bridge deck pavement structure is improved, and the problem that the service life of the bridge deck pavement structure is short is solved.

The invention provides a composite protection structure suitable for underwater seepage prevention and explosion prevention of a concrete gravity dam and a preparation and construction method, and belongs to the technical field of engineering explosion prevention and seepage prevention. The composite protection structure comprises a reinforced concrete slab anchored on the outer surface of the gravity dam by a certain distance through an anchor rod; a reserved interlayer between the reinforced concrete slab and the outer surface of the gravity dam is filled to form an anti-seepage and anti-explosion composite layer; the anti-seepage and anti-explosion composite layer is formed by pouring hollow glass bead-asphalt concrete, and the hollow glass bead-asphalt concrete is prepared from asphalt concrete with modified hollow glass beads as filler; the modified hollow glass beads account for more than 15% of the asphalt concrete by volume, and the asphalt concrete has enough sealing gas for reflecting explosive shock waves and has the characteristics of seepage prevention and energy dissipation. The composite protection structure has anti-seepage and anti-explosion functions, the service life of the dam is prolonged, and the ability of the dam to resist sudden extreme working conditions is improved.

The invention discloses a road carbon emission evaluation method and system, and relates to the technical field of carbon emission evaluation, and the method comprises the following steps: S1, collecting the traffic flow data and environment data of a target road section in real time through a roadside sensing array; s2, constructing a road body carbon emission calculation model; s3, establishing a maintenance activity carbon emission compensation model; s4, constructing a driving behavior carbon emission correction model; s5, establishing a climate accumulation effect correlation model; and S6, generating a dynamic emission coefficient matrix, and establishing a carbon emission coefficient dynamic correction mechanism of different generations of vehicles. According to the method, the road body carbon emission calculation model is constructed, the unit mileage road maintenance carbon emission factor is dynamically generated, oxygenolysis carbon emission of the asphalt concrete material is considered, the influence of the road surface flatness on the vehicle rolling resistance is also taken into account, and therefore comprehensive and accurate accounting of the road carbon emission is achieved, and the calculation efficiency is improved. And the accuracy of the evaluation result is obviously improved.

The invention provides low-temperature-resistant high-modulus rubber asphalt and a preparation method thereof, and relates to the technical field of rubber asphalt, and preparation raw materials of the low-temperature-resistant high-modulus rubber asphalt comprise the following components: matrix asphalt, rubber powder, a desulfurizer, a free radical type thermal initiation crosslinking agent, a reinforcing agent, a coupling agent, a flexibilizer, a viscosity reducer and an auxiliary agent. According to the low-temperature-resistant high-modulus rubber asphalt provided by the invention, the ductility at 5 DEG C is greater than 30cm, the maximum breaking flexural-tensile strain of a mixture at-10 DEG C is greater than 4000 mu epsilon, the dynamic modulus of the mixture at 15 DEG C is greater than 15000MPa, and the high-temperature performance and modulus of high-modulus asphalt concrete are not reduced while the crack resistance of the high-modulus asphalt concrete is helped to be improved. When being applied to pavement middle layer pavement, the pavement anti-cracking agent can improve the anti-cracking performance of the whole pavement structure, reduce the pavement maintenance cost and improve the driving safety.

The present invention relates to the technical field of pavement materials, and particularly relates to a high-performance asphalt concrete pavement material and a preparation method thereof. The formula of the pavement material includes asphalt, high melt index SBS, fine aggregate, coarse aggregate, fly ash, water reducer, low-temperature anti-cracking agent and anti-freezing agent. Among them, the preparation method of the low-temperature anti-cracking agent includes stirring and melt spinning of homopolypropylene, nano-silicon carbide and low melt index SBS to obtain the low-temperature anti-cracking agent. By optimizing the ratio and adding specific components, the material has good low-temperature anti-cracking performance, anti-freezing performance and anti-stripping performance. The high-performance asphalt concrete pavement material provided by the present invention is expected to be applied to highway engineering and road construction fields in low-temperature regions.

The utility model belongs to the technical field of asphalt concrete face rock-fill dams, and discloses an asphalt concrete face heat preservation structure which is arranged between the dam top and the reservoir bottom of a dam and comprises an asphalt concrete face and a heat preservation layer which are sequentially laid on dam filling materials, and the heat preservation layer comprises a light frame and a plurality of heat preservation units. The light frame is provided with a plurality of containing cavities, the heat preservation units are clamped in the containing cavities, and fixing structures are arranged at the end, located at the dam crest and the end, located at the reservoir bottom, of the heat preservation layer. Heat preservation of the asphalt concrete panel is achieved by laying the light frame and the heat preservation unit on the asphalt concrete panel, construction is convenient and fast, the construction period is short, and the standardization degree is high; the stability of the overall structure of the heat preservation layer can be improved, meanwhile, the circumferential direction of the heat preservation unit can be fixed, and deformation of the heat preservation unit is effectively prevented; and the thermal insulation layer can be replaced conveniently when being damaged.

The utility model relates to the technical field of bridge expansion and reconstruction, and discloses a bridge widening corrugated plate splicing structure which comprises a corrugated plate, the corrugated plate connects an old bridge with a steel-concrete composite beam through a connecting piece, the corrugated plate is located between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with asphalt concrete, and the lower portion of the corrugated plate is filled with concrete. The top face of the asphalt concrete is flush with the top face of the old bridge and the top face of the steel-concrete composite beam. The corrugated plate is spliced between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with the asphalt concrete so that the plane of the corrugated plate can be flush with the old bridge and the steel-concrete composite beam, the asphalt concrete and the corrugated plate bear additional internal force generated by the settlement difference of the new bridge and the old bridge together, and the crack resistance of the connecting structure at the splicing position can be effectively improved.

The utility model discloses a concrete paving device with a height control function, and relates to the technical field of road cement and asphalt concrete paving. A concrete paving device with a height control function comprises a paving frame and a paving part, the paving frame comprises a right-angle carrying plate, paving surrounding plates are fixed to the two sides of the right-angle carrying plate, the paving part is installed between the two paving surrounding plates and comprises a paving module and a control module, and the control module controls the paving module to ascend and descend to control the concrete paving height. The paving module comprises a lifting seat located between the paving surrounding plates, a paving plate is arranged at the bottom of the lifting seat, and the end, deviating from the paving advancing direction, of the paving plate is obliquely arranged upwards. Through the arrangement of the paving piece and the like, the paving height of the paving device can be adjusted at any time in the use process, the use of the paver is not influenced, air bubbles and gaps in a paving layer can be effectively eliminated by the paver, and the compactness and the compression resistance of a road surface are improved.

The utility model discloses a steel bridge deck pavement structure, which belongs to the technical field of road pavement, and comprises a steel plate, an anti-corrosion layer, a waterproof bonding layer, a pavement lower layer, an interlayer bonding layer and a pavement upper layer which are sequentially paved from bottom to top, the anti-corrosion layer is epoxy zinc-rich primer, the waterproof bonding layer is epoxy resin adhesive, and the interlayer bonding layer is epoxy resin adhesive. The pavement lower layer is made of epoxy asphalt concrete, the interlayer bonding layer comprises an epoxy asphalt adhesive, a glass fiber grating and broken stone, the pavement upper layer is made of modified asphalt concrete SMA, and the problems of high-temperature pushing, surface layer cracking and the like can be effectively solved.

The utility model relates to the technical field of expansion joints, in particular to a deformed steel-elastic body combined seamless expansion joint structure and a bridge, the expansion joint structure increases the coupling action area and the coupling force of an elastic body and deformed steel through the combined structural design of a deformed plate, the deformed steel, the elastic body and a covering layer, so that the expansion joint structure is more flexible and reliable. The phenomenon that weak connecting surfaces are easy to debond too early is improved, the service life of the structure is prolonged, and the durability of the structure is improved; the deformation direction of the elastic body is controllable, the road surface is prevented from bulging, and the driving safety problems such as bumping are completely eradicated; the covering layer in the expansion joint area can cooperate with the elastic material for tension and compression deformation, meanwhile, it is guaranteed that the rigidity transition from the asphalt concrete layer in the non-expansion area to the covering layer is smooth, and the vicious circle that the bumping phenomenon is caused by the unsmooth road surface, and the local damage of the road surface is more serious due to the impact load under the bumping phenomenon is prevented.

The invention relates to the technical field of anti-seepage protective materials, in particular to a high-toughness high-molecular flexible auxiliary anti-seepage protective material and a preparation method thereof, and the high-toughness high-molecular flexible auxiliary anti-seepage protective material comprises a component A and a component B, the component A at least comprises the following preparation raw materials: first polyol, a chain extender, diisocyanate and an anti-aging agent, the mass ratio of the diisocyanate in the component A is 22-35%, and the mass ratio of the anti-aging agent in the component A is 0.1-1%; the first polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol, and the second polyhydric alcohol is prepared from poly (neopentyl glycol adipate)-1, 6-hexanediol ester glycol, hydrogenated castor oil polyether polyol, polytetrahydrofuran glycol and polyfunctional polyether polyol; the chain extender is prepared from dipropylene glycol and methyl propylene glycol; the component B is prepared from the following raw materials: second polyol, a plasticizer, a filler and an amine catalyst, and is subsequently coated on the surfaces of base materials such as asphalt concrete and concrete to isolate a bottom structure from the external environment, so that the effects of isolation, seepage prevention, protection, insulation, flame retardance and the like are achieved.

The invention discloses a method for determining the crest elevation of a rolling type earth and rockfill dam in water conservancy and hydropower engineering. Comprising the following steps: collecting meteorological data, determining a calculated wind speed, determining a water area plane, determining an equivalent wind area length, determining a water area average depth, determining an average wave height and an average wave period, determining an average wavelength, determining a designed wave climb height, determining a wind congestion water surface height, determining a safe height, determining a dam body total superelevation, and determining a wave wall height. And determining the dam crest elevation. The method is suitable for earth and rockfill dams such as clay core-wall rockfill dams, asphalt concrete core-wall rockfill dams, asphalt concrete face rockfill dams, concrete face rockfill dams and homogeneous dams. The method not only has scientificity, accuracy, comprehensiveness, systematicness, safety and economical efficiency, but also is easy to popularize and apply, and has important significance for improving the accuracy and safety of dam design.

The invention relates to the technical field of nano modification of asphalt-based composite materials, in particular to silicon oxide modified high-viscosity anti-rutting asphalt concrete and a preparation method thereof, and the silicon oxide modified high-viscosity anti-rutting asphalt concrete is composed of matrix asphalt, a core-shell structure silicon oxide modifier, a graphene-butadiene styrene rubber composite high-viscosity agent and the like; the core-shell structure silicon oxide modifier is prepared by special coating and in-situ polymerization of a composite high-viscosity agent; basalt-polyester hybrid fiber, multi-graded limestone aggregate and nano clay-mineral powder composite filler are also used; the preparation method comprises the following steps: preparing the modifier, preparing the composite high-viscosity agent and the like, wherein specific conditions and parameters are controlled in each step. By innovating the materials and the process, the properties such as rut resistance, low-temperature crack resistance, water stability and the like are improved, the compatibility and dispersity of the materials are improved, the durability is enhanced, the service life of the pavement is prolonged, and economic and social benefits are achieved.

The invention relates to the technical field of material detection, and discloses an asphalt concrete fluidity detection device which comprises a base, an extension rod is arranged on the outer surface of the driving end of a lifting mechanism, a detection rod fixedly penetrates through the end, away from the lifting mechanism, of the extension rod, and a detection head is fixedly connected to the bottom end of the detection rod. A cleaning assembly is arranged on the side edge of the lifting mechanism, a rotating assembly is arranged between the lifting mechanism and the cleaning assembly, the cleaning assembly comprises an inner ring arranged on the outer surface of the detection rod in a sleeving mode, and an elastic rubber ring is arranged in the inner ring. According to the asphalt concrete fluidity detection device, automatic cleaning of the detection head is achieved by means of an elastic rubber ring outside the detection rod and a reciprocating rotation structure, when the detection head moves upwards, the rubber ring with the larger size is elastically attached to the surface of the detection head to slide, meanwhile, the vertical plate track drives the gear rack to make the rubber ring rotate in a reciprocating mode, and unsolidified asphalt is scraped; and the cleaning effect is enhanced through rotation, attached materials are shaken off, manual cleaning is reduced, and the detection continuity and convenience are improved.

The invention relates to the technical field of asphalt concrete production, in particular to an asphalt mixing plant monitoring system and method. The method comprises the following steps: acquiring real-time production operation data of the asphalt mixing plant, and constructing a real-time production state vector; acquiring production process data of all superior product batches in history as a training data set; performing clustering processing on the training data set to obtain a qualified mode set; when the real-time production state vector does not belong to any qualified production mode cluster, calculating a mode deviation degree, and further calculating a comprehensive risk level; performing grading early warning based on a size relationship between the comprehensive risk grade and a preset risk threshold value, and monitoring the asphalt mixing plant; and the monitoring accuracy of the asphalt stirring process is improved.

The invention relates to the technical field of asphalt concrete quality monitoring, and discloses asphalt concrete quality monitoring equipment which comprises a bottom plate, and a melting component is arranged at the top of the bottom plate; the melting part comprises a monitoring plate, the bottom of the monitoring plate is fixedly connected with the top of the bottom plate, an adaptive groove is formed in the top of the monitoring plate, a supporting rod is fixedly connected to the top of the monitoring plate, a working table is fixedly connected to the top of the supporting rod, and a monitoring frame is fixedly connected to the inner wall of the working table. Heat generated by the heating device can enter the air outlet frame, a fan is started to start operation, heat generated by the fan enters the air outlet frame and enters the monitoring frame through the air outlet frame, and asphalt concrete entering the monitoring frame is heated through the heating device; the asphalt concrete can be molten in the monitoring frame, and the molten asphalt concrete can be attached to the inner wall of the monitoring frame, so that the adhesion of the asphalt concrete can be monitored through the adhesion monitoring component.

The invention relates to the technical field of asphalt concrete production, in particular to a bag-type dust remover for stone dust recycling, which comprises a dust removal bin, a pattern plate is fixedly mounted on the upper side in the dust removal bin, a plurality of mounting holes are formed in the pattern plate, dust removal bags and a bag cage are mounted in the mounting holes, and an air outlet cylinder is rotatably mounted in the bag cage. A plurality of expansion units which are uniformly arranged up and down are mounted on the outer side of the air outlet cylinder, expansion rings are mounted on the expansion units, and the expansion rings are fixedly connected with the cloth bag cage; through radial expansion and retraction of the expansion ring, a hardened layer on the surface of the filter bag can be effectively broken, meanwhile, the subsequent pulse back-blowing dust removal effect is improved, and the dust recovery efficiency is ensured; when the dust collection bag is locally damaged, the dust collection bag can prevent dust-containing air flow from flowing out through the air outlet cylinder, so that the dust collection bag can still maintain a normal filtering function in other areas except the damaged position, thereby reducing environmental pollution and ensuring the dust collection efficiency.

The invention discloses a dust recovery device for asphalt concrete production, and particularly relates to the technical field of dust recovery in asphalt concrete production, the dust recovery device comprises a supporting frame, a one-way mechanism is mounted on the other side of a recovery box, airflow plates are mounted on the front side and the rear side of the recovery box, and an air blower is fixedly mounted at the bottom of the recovery box; a flow guide plate with the arc-shaped bottom is installed in an inner cavity of the recycling box, conveying assemblies are installed on the front side and the rear side of the inner cavity of the recycling box, filter cartridges are arranged on the two sides of the flow guide plate, and a knocking mechanism is arranged on the upper portion of the flow guide plate. According to the dust recovery device for asphalt concrete production, the knocking mechanism drives the internal structure of the one-way mechanism to move while knocking the filter cartridge, and then drives the internal structure of the collecting assembly to rotate in the movement process of the one-way mechanism, so that the dust is recovered; and therefore, dust impurities entering the conveying assembly are conveyed into the storage tank to be collected, and subsequent resource recycling is facilitated.

The invention relates to the field of overlay materials, in particular to a two-component overlay material suitable for a modified asphalt concrete pavement and a preparation method of the two-component overlay material. The two-component overlay material suitable for the modified asphalt concrete pavement comprises the following raw materials: a component A: a polymer emulsion, a composite additive, a silane coupling agent, a film-forming agent, an ultraviolet absorbent, a stabilizer and the like; the component B is a polyisocyanate curing agent. The finally prepared two-component overlay material can simultaneously give consideration to comprehensive properties such as adhesion, hydrolysis resistance, weather resistance and saline-alkaline resistance, the phenomenon that other properties are greatly sacrificed for a certain prominent property is avoided, and the overlay material can be ensured to be popularized and applied in various environments and harsh working conditions; the technical level of modified asphalt concrete pavement maintenance is greatly improved, and the application effect is excellent.

To provide a greening method for poured concrete roofs and rooftops, or asphalt and concrete and the like.SOLUTION: Provided is a greening method, in which a construction area is surrounded by a partition frame, and a root-potted plant is placed in a center of the contact point between laid TK planting mats, a hook-shaped anchor pin is inserted into the contact point between the TK planting mats, a welded wire mesh locking member is used to hold and secure them in place, a looped wire passed through a PVC tube is fastened to an anchor claw on the head of the anchor pin to connect the anchor pins together, a nut on the head of the anchor pin is re-tightened to tighten the looped wire, and the tree is planted and secured to prevent it from falling over.SELECTED DRAWING: Figure 1

The invention provides an asphalt concrete paver, and relates to the technical field of pavers. The paver comprises a vehicle body, a first driving mechanism, a paving mechanism, a first connecting mechanism and a discharging mechanism, the vehicle body comprises a hopper. The first driving mechanism comprises a supporting frame and a driving lead screw which is arranged in the supporting frame in a penetrating mode and driven by a first motor to rotate. The paving mechanism comprises an ironing plate connected with the driving screw rod; the first connecting mechanism comprises a connecting plate connected to a rod body of the driving screw rod, and the other end of the connecting plate is connected with the ironing plate; the discharging mechanism is arranged at the bottom of the car hopper and comprises a first rotating shaft and a plurality of blades, the first rotating shaft penetrates through the discharging channel in the direction perpendicular to the bottom of the car hopper, the blades surround the first rotating shaft and are located in the discharging channel, and one end of the first rotating shaft is connected with the driving lead screw through a linkage structure; and the driving screw rod is used for driving the ironing plate to move and driving the first rotating shaft to rotate through self rotation, so that the paving uniformity and the discharging speed uniformity can be synchronously improved.

The invention relates to the technical field of asphalt paving, and discloses an asphalt concrete paving device which comprises a carrier plate, and a storage box with a discharge pipe at the bottom is arranged on the carrier plate; the material distributing rod is vertically arranged on the side edge of the discharging pipe at the bottom of the carrier plate; the side edges of the two first scrapers are connected to the face, away from the discharging pipe, of the distributing rod, and mounting grooves are formed in the two sides, perpendicular to the carrying plate, of the two first scrapers. Each first feeding piece comprises two rotating shafts and an annular conveying belt, the two rotating shafts are longitudinally and rotationally connected into the two mounting grooves correspondingly, and the two rotating shafts are sleeved with the annular conveying belt; the two U-shaped scraping plates are arranged on the faces, away from the distributing rod, of the two first scraping plates correspondingly. The annular conveying belt penetrates through the U-shaped scraping plate; according to the paving device, adaptive adjustment can be rapidly conducted on the scraper blade according to the actual situation of the area to be paved, the surface flatness of the scraper blade is guaranteed all the time in the paving process, the situation that the road surface is concave and convex due to the fact that the scraper blade is not flat is effectively avoided, and the forming quality of the road surface is guaranteed.

The invention belongs to the technical field of crushing equipment, and particularly provides a concrete crushing and screening device and a recycled asphalt concrete production process. The concrete crushing and screening device comprises a multi-stage vibrating screen, a first-stage crusher and a second-stage crusher, and the multi-stage vibrating screen can screen concrete materials into at least three types according to the particle size in advance. In the working process, powder materials which do not need to be crushed repeatedly are directly discharged through the corresponding discharging ports and do not enter the first-stage crusher and the second-stage crusher any more, energy consumption is reduced, and excessive crushing is avoided. Coarse aggregate with large particle size firstly enters the primary crusher through the corresponding discharge port, and then enters the secondary crusher through the discharge channel for secondary crushing. The graded crushing design ensures that the coarse aggregate is fully crushed, the mixing of substandard aggregate or powder materials in a final product is reduced, and the grading uniformity of the recycled aggregate and the quality stability of the product are improved.

The application provides an anti-water freezing type gelling stable phosphogypsum asphalt concrete and a preparation method thereof, and comprises the following steps: 1, obtaining phosphogypsum powder by treating recycled waste phosphogypsum; 2, preparing PU / cement composite modified asphalt; 3, quantitatively taking PU / cement composite modified asphalt, natural aggregate and the phosphogypsum powder obtained in the step 1) (instead of mineral powder); 4, according to the designed mixing ratio, mixing the PU / cement composite modified asphalt, aggregate and phosphogypsum filler to prepare the anti-water / anti-freezing type phosphogypsum asphalt concrete. The composite modification of PU and cement can enhance the adhesion of asphalt to the natural aggregate and the phosphogypsum, significantly improve the water resistance and freezing resistance of the anti-water / anti-freezing type phosphogypsum asphalt concrete, greatly solve the problem that the potential practical engineering application of the phosphogypsum filler is limited due to the poor water stability, relieve the environmental pollution problem, and the production process is simple and easy to operate.

The utility model relates to the technical field of road construction equipment, in particular to a spiral paver for asphalt concrete, which comprises a rack, a spiral paving component, a paving controller and an ironing plate, and the paving controller and the ironing plate are arranged on the rack; the spiral spreading assembly comprises at least two spiral spreading devices which are connected in sequence, each spiral spreading device is connected with the rack through a lifting suspension support, and the spiral spreading devices and the lifting suspension supports are connected with the spreading controller. According to the utility model, the spiral pavers are arranged in sections, and the height of each section of spiral paver is adjusted, so that the uniform paving of the asphalt mixture is controlled, and the problem of segregation of asphalt concrete is solved.

The utility model relates to the field of asphalt pavements, in particular to an anti-freezing asphalt pavement which comprises an asphalt layer, and the grating net is mounted below the asphalt layer and is used for resisting freezing and cracking. According to the anti-freezing asphalt pavement disclosed by the utility model, the asphalt layer, the grating net, the asphalt waterproof bonding layer, the modified asphalt concrete, the modified emulsified asphalt bonding layer and the high-modulus asphalt concrete are arranged, and stearic acid modified calcium sulfate whiskers and a silane coupling agent are added into the asphalt layer, so that the low-temperature performance of a mixture is not reduced; according to the anti-freezing asphalt pavement composition disclosed by the invention, the glass fiber grid is arranged below the asphalt layer and has low-temperature-resistant and anti-freezing effects, and meanwhile, polyvinyl alcohol and cellulose nanofibers are added into the modified emulsified asphalt bonding layer, so that the anti-freezing performance of the anti-freezing asphalt pavement composition is improved, and the anti-freezing performance of the anti-freezing asphalt pavement composition is improved. And through the mutual synergistic effect of the two components, the anti-freezing performance of the anti-freezing asphalt pavement composition is further improved.

The invention discloses a processing technology of high-durability colored asphalt concrete, belongs to the technical field of asphalt concrete, and aims to solve the technical problem that the color stability, rut resistance, water damage resistance and other properties of colored asphalt concrete in the prior art need to be further improved. The preparation method comprises the following steps: adding emulsified colored asphalt and a curing agent into a stirrer, stirring and mixing, adding coarse aggregate, fine aggregate and an auxiliary additive into the stirrer, raising the temperature of the stirrer to 90-100 DEG C, and stirring and mixing for 40-50 minutes to obtain the colored asphalt concrete. The emulsified colored asphalt is mixed with the filler, so that the stability of the colored asphalt concrete is effectively improved, and the color durability and stability of the colored asphalt concrete are also improved.