44results about How to "Guaranteed road performance" patented technology

The invention provides a cold-mixed and cold-laid asphalt mixture, and a cold-mixed and cold-laid asphalt mixture wearing layer, and belongs to the technical field of road engineering. The cold-mixedand cold-laid asphalt mixture comprises coarse aggregates, fine aggregates, high-performance modified emulsified asphalt, a mineral filler, water and a liquid additive. The asphalt mixture prepared from above cold-mixed and cold-laid material components according to a special mineral grading range can be closely bonded to an old asphalt pavement and a cement pavement; and compared with traditionalmicro-surfacing and super-sticky wearing layer materials, the mixture has higher resistance to crack, water and skid and lower driving noises.

Provided are a hot recycling method of asphalt mixing materials and a hot recycling device of asphalt mixing materials. The hot recycling method comprises the following steps: pretreating and calculating new stone powder; pretreating and calculating new asphalt; pretreating and calculating new construction aggregates, pretreating and calculating waste asphalt, placing the calculated waste asphalt into a secondary stirring cylinder, placing reclaiming agents into the secondary stirring cylinder, and evenly stirring the waste asphalt and the reclaiming agents; and placing the waste asphalt evenly mixed with the reclaiming agents and the calculated new stone powder, new asphalt and construction aggregates into a primary stirring cylinder and evenly stirring the mixture. Compared with the prior art, the waste asphalt is firstly placed in the secondary stirring cylinder to be evenly mixed with the reclaiming agents before the waste asphalt is placed in the main stirring cylinder, accordingly, the reclaiming agents and the waste asphalt are evenly mixed in advance, the stirring time of the main stirring cylinder is shortened, and production capacity of the whole device is improved.

The invention discloses an electric-conduction anti-skid wearing layer for a pavement and a preparation method thereof. An electric-conduction carbon fiber cloth layer (6) is arranged on a heat-insulation bonding layer (7) and is provided with a broken basalt protection layer (5); and the broken basalt protection layer (5) is provided with a black corundum metalling layer (4), and is integrally 7mm-9mm in thickness. The electric-conduction anti-skid wearing layer has high heating efficiency, and is suitable for deicing and snow melting on the pavements in winter. The electric-conduction carbon fiber cloth layer is thin integrally, and is constructed at normal temperature, thus having the advantages of flexible construction; and the electric-conduction anti-skid wearing layer is suitable for deicing and snow melting on the pavements in winter, so that the driving safety on the pavements is improved.

The invention discloses a composite pavement structure and a construction method thereof. The composite pavement structure comprises an upper asphalt concrete finishing coat and a lower old cement concrete slab layer, wherein the slab layer comprises a plurality of old cement concrete slab connection groups; and each connection group is formed by connecting a plurality of old cement concrete slabs by means of connecting parts arranged at the joints of the old cement concrete slabs. The construction method of the composite pavement structure comprises the following steps: firstly determining the connection type in the road section to be reconstructed based on the plan; secondly determining the arrangement type of rake nails at the joints; thirdly drilling rake nail holes corresponding to the rake nails in terms of quantity and space on the edges of the old cement concrete slabs at the two sides of the joints; fourthly implanting the rake nails and pouring epoxy cement mortars into the rake nail holes to fix the rake nails; fifthly sprinkling water to cover the old cement concrete slabs to cure and form the old cement concrete slab layer; and finally paving the asphalt concrete finishing coat on the old cement concrete slab layer, thus obtaining the composite pavement structure. The composite pavement structure has the advantages of good economical efficiency, obvious reflection crack resistance effect, good road property, long service life and the like, and is convenient for construction.

The invention relates to high-strength modified asphalt and a preparation method thereof. The high-strength modified asphalt comprises the following components in parts by weight: 40-90 parts of 70# matrix asphalt, 5-9 parts of a polymer modifier, 15-35 parts of a composite anti-rut aid, 0.5-1.5 parts of an antioxidant, 3-7 parts of an organic viscosity reducer and 0.2-0.4 part of a stabilizer. Different from existing single rock asphalt modification with a large mixing amount, composite modification has the characteristics that on the premise of reducing the mixing amount of rock asphalt, other materials such as petroleum resin are used for compounding or replacing rock asphalt to improve the high-temperature performance of asphalt, and on the premise of guaranteeing the high-temperature performance of asphalt, the modified asphalt is stable in storage and not prone to depositing at the bottom of a tank or polluting a production pipeline, and the asphalt production quality is guaranteed.

The invention discloses a drainage regenerated asphalt mixture. The mixture comprises a recycled material, aggregate, padding, a fiber stabilizer and cutback asphalt, wherein the recycled material is formed by digging and milling a used drainage asphalt mixture on a pavement for more than ten years; the aggregate comprises coarse aggregate and fine aggregate; the coarse aggregate adopts basalt; the fine aggregate adopts limestone; the nominal maximum aggregate size of the aggregate is 13.2mm; the padding adopts lime stone dust; the fiber stabilizer adopts lignin fiber, basalt mineral fiber or mixed fiber of the lignin fiber and the basalt mineral fiber; the mixing amount of the fiber stabilizer is 0.1 to 0.6 percent of the mass of the drainage regenerated asphalt mixture; the cutback asphalt adopts cutback polymer modified asphalt, and the mixing amount of the cutback asphalt is 4.8 to 7.6 percent of the mass of the drainage regenerated asphalt mixture. The invention further discloses a match ratio design method of the drainage regenerated asphalt mixture. The match ratio design method ensures that the blending ratio of the recycled material is optimized while guaranteeing the pavement performance of the drainage asphalt mixture.

The invention discloses an anti-rut pavement structure of a heat reflection fog sealing layer material for high temperature heavy duty conditions. The structure is made by mixing 0.5-3 parts by mass of hollow ceramic particles with 7-9.5 parts by mass of emulsified bitumen. The anti-rut pavement structure of the heat reflection fog sealing layer material for high temperature heavy duty conditions sequentially comprises an upper surface layer, a medium lower surface layer and a base layer; and the upper surface layer is an SMA-13 bitumen mixture layer, the medium lower surface layer is an HMAC-20 high modulus bitumen mixture layer, the base layer is an LSAM large particle size bitumen mixture layer and a cement stable crushed rock layer, and the surface of the upper surface layer is coated with the heat reflection fog sealing layer material.

The embodiment of the invention discloses a modifier as well as a preparation method and application thereof. The modifier is prepared from the following raw materials in parts by weight: 40-80 partsof thermoplastic elastomer polymer, 10-30 parts of modified petroleum resin, 5-20 parts of thermally sensitive resin, 1-5 parts of a stabilizer, 5-20 parts of a plasticizer and 1-3 parts of an antioxidant. The thermoplastic elastomer polymer in the embodiment of the invention has an effect of enhancing and toughening the modifier, so that the high/low-temperature service performance of the modifier can be ensured; the modified petroleum resin has strongly polar groups and is matched with the thermoplastic elastomer polymer, so that the viscosity of asphalt at a service temperature can be obviously improved, and the pavement performance of the mixture is ensured; the thermally sensitive resin has the characteristic of excellent temperature sensitivity and is matched with the plasticizer andthe stabilizer, so that the applicable viscosity of the asphalt at a high temperature can be effectively reduced, and the construction workability of the mixture is improved; and moreover, since thehigh temperature viscosity is reduced, the melting dispersion characteristic of the modifier can be improved.

The invention provides a ready-to-use high-dispersion high-viscosity modifier and a preparation method thereof. The modifier comprises, by weight, 20-60 parts of polymer modifier, 5-10 parts of swelling agent, 20-45 parts of dispersing agent, 4-10 parts of plasticizer and 0.2-0.5 part of crosslinking agent. The method includes the following steps that first, the polymer modifier and the swelling agent are heated for 30-60 minutes at the temperature of 100 DEG C to be swelled to be in a flowing state, then the mixture is poured into the dispersing agent which is already heated to be in a flowing state, the plasticizer and the crosslinking agent are added, and then the mixture is sheared for 5-15 minutes through a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 1000-3000 r/min, and the temperature ranges from 140 DEG C to 180 DEG C; after completion, the mixture is poured into an evaporating vessel, then the evaporating vessel is put into a vacuum drying box of 120 DEG C to be kept warm for 1 h, and then the mixture is pulled into strips, extruded out and granulated through a single-screw extruder. The production cost is low, dispersion and evenness are excellent, the high-temperature stability of high-viscosity modified asphalt can be further improved, and social and economic benefits are remarkable.

The invention discloses a high-solid-content emulsified asphalt for a stress absorbing layer, a preparation method and a construction method thereof. The high-solid-content emulsified asphalt is prepared from ordinary asphalt, asphalt additive, emulgator, modifier, water and pH regulator; the solid content is 67-75%; the raw materials by weight percent are as follows: 50-70% of ordinary asphalt, 1-12% of asphalt additive, 0.2-3.0% of emulgator, 2.0-10.0% of modifier and the balance of water and pH regulator. The preparation method comprises the following steps: heating ordinary asphalt; addingasphalt additive into ordinary asphalt at a ratio and uniformly stirring, thereby acquiring a mixture of ordinary asphalt and asphalt additive; preparing emulgator into an aqueous solution, and thenadding modifier, thereby acquiring an emulgator liquid soup; using pH regulator for regulating pH value of the emulgator liquid soup, and then heating; successively putting the emulgator liquid soup and the mixture of ordinary asphalt and asphalt additive into a colloid mill, and then milling, thereby acquiring an end product of emulsified asphalt. According to the invention, a synchronous macadamseal coat vehicle is adopted for spraying/spreading emulsified asphalt and macadam; a 'prime coat and stress absorbing layer' effect can be achieved through once construction; construction process isreduced; construction cost is lowered.

The invention discloses an asphalt pavement capable of providing a charging function for vehicles in a driving process. The asphalt pavement sequentially comprises an asphalt concrete sealing layer, a grille, a polymer cement concrete structure layer and a base layer from top to bottom, wherein the polymer cement concrete structure layer comprises an emitting circuit; an external alternating current power supply generates an alternating current electromagnetic field to realize the mutual induction with a secondary coil arranged in an underpan of a driving vehicle; an electromagnetic induction charging system is formed. The problem of insufficient cruising power of an electric automobile is solved. On the premise of not influencing the automobile driving, the driving distance of the electric automobile is prolonged; meanwhile, the possibly generated potential safety hazard of electricity leakage of the conventional manual direct charging type parking charging is also solved. The asphalt concrete sealing layer uses aggregates with low iron bearing rate; on the basis of ensuring road-use performance and structural intensity, the pavement structure thickness on an emitting circuit primary coil is controlled.

The invention discloses an environment-friendly asphalt mixture additive and a preparation method thereof. The environment-friendly asphalt mixture additive is prepared from, by weight, 55%-90% of powdery solids, 7%-20% of polyethylene, 1%-5% of a fluorocarbon surfactant, 1%-10% of Kaloamine and 1%-10% of alkyl glycoside. The preparation method comprises the following steps that the powdery materials, polyethylene, the fluorocarbon surfactant, Kaloamine and alkyl glycoside are put into a screw extruder in proportion, mixed to be uniform and extruded to obtain a finished product, and then the asphalt mixture additive is obtained. According to the asphalt mixture additive, the powdery solids generated after thermal extraction treatment of oily sludge can be fully reused and can be put into asphalt mixture production by replacing ore powder, environmental pollution is reduced, the cost is reduced, the rutting deformation resistance of the asphalt mixture is improved, and the service life of a pavement can be prolonged.

The invention discloses a designing and evaluating method for a modulus-based bituminous mixture. The designing and evaluating method for the modulus-based bituminous mixture comprises the following steps: surveying or detecting performance of local aggregates and asphalt; primarily selecting grading according to local aggregate grading and standard suggested grading; predicting a VMA value of themixture by a bituminous mixture mineral aggregate clearance rate VMA predicting formula, and preliminarily adjusting grading to enable the VMA value to meet the standard requirement; primarily selecting the use amount of asphalt and calculating the effective asphalt use amount VFA of the mixture; calculating the dynamic modulus of the bituminous mixture; comparing whether a dynamic modulus predicted value is in a bituminous mixture dynamic modulus range in which the performance of the mixture is acceptable; and manufacturing a test piece according to the matching ratio of the bituminous mixture of which the dynamic modulus meets requirements, and verifying whether the pavement performance of the mixture meets the requirements or not.

The invention discloses a method for correcting the production mix proportion of a high-viscosity rubber skeleton void type asphalt mixture. The method comprises the following steps: S1, calculating a designed mix proportion; S2, adjusting the high-temperature volume ; S3, initially adjusting the asphalt-aggregate ratio; S4, determining the mixing amount of rubber; S5, determining the asphalt-aggregate ratio; S6, inspecting the asphalt-aggregate ratio; and S7, performing performance inspection. According to the method disclosed by the invention, influence of high temperature of a production environment on swelling and dissolution of rubber is considered when the production mix proportion of the asphalt mixture is corrected, and when rubber particles are used for replacing aggregate, the swelled and dissolved rubber is used for replacing the isopyknic aggregate, influence on the structure of the mixture due to the change of the volume of the rubber is reduced, new indexes are adopted, the optimal asphalt-aggregate ratio is determined, the asphalt-aggregate ratio is detected by considering the influence on the structure under the dual action of water and changing temperature aiming at the structural characteristics of the high-viscosity rubber particle skeleton void type asphalt mixture, the use performance of a pavement is improved, and the service life of the pavement is prolonged.

The invention relates to anti-aging soluble rubber powder modified asphalt which comprises the following components in parts by weight: 15-18 parts of rubber particles, 77-82 parts of petroleum asphalt, 1-2 parts of antioxidant tri (2, 4-di-tert-butylphenyl) phosphite, 1-2 parts of light stabilizer 2-hydroxy-4-methoxybenzophenone, 0.1-1 part of catalyst 4-(4-chlorphenyl)-4-thiazoline-2-thioketoneand 0.1-1 part of cross-linking agent 3-phenyl-2-thioketone-1, 3-thiazoline-4-ketone. Compared with the prior art, under the condition of ensuring that other main pavement performance technical indexes of the asphalt are not reduced or not remarkably reduced, the aging of the soluble rubber powder in the preparation process can be remarkably reduced, and the thermo-oxidative aging resistance and the ultraviolet aging resistance of the asphalt for pavements are remarkably improved.

The invention discloses an asphalt pavement heat reflection slurry seal material and a preparation method thereof. In order to reduce the temperature of the asphalt pavement, hollow glass beads are adopted, and the asphalt pavement heat reflection slurry seal is prepared by combining an asphalt pavement slurry seal technology. According to the slurry seal material, the pavement performance of the material is guaranteed, the pre-curing effect of the slurry seal is exerted, meanwhile, the influence of temperature rise of an asphalt pavement caused by sunlight irradiation is relieved, and the slurry seal material is reasonable in manufacturing cost, convenient to construct, good in using effect and wide in application range.