14 results about "Asphalt mastic" patented technology

This invention discloses a smart rail transit pavement based on the reconstruction of existing pavement and its construction method, belonging to the field of highway pavement. It includes a fine-grained asphalt mastic-aggregate surface layer, the existing pavement, and an epoxy asphalt medium-grained asphalt concrete support strip embedded within the existing pavement. The epoxy asphalt medium-grained asphalt concrete support strip comprises the following components in parts by weight: 10-14 parts of 10-20mm coarse aggregate; 12-50 parts of 5-15mm coarse aggregate; 0-18 parts of 3-5mm coarse aggregate; 5-36 parts of 0-3mm fine aggregate; 3-8 parts of filler; 2.4-2.9 parts of asphalt; and 2.4-2.9 parts of epoxy resin additive. This invention addresses the relatively fixed trajectory of smart rail transit vehicles by adding a local support structure to the existing pavement, providing better load-bearing capacity and stability, improving the stress behavior of the existing pavement, effectively alleviating rutting problems in smart rail transit pavements, and exhibiting anti-rutting properties. Meanwhile, compared with the construction method of complete repaving, the structure and construction method described in this invention have better time and economic benefits.

The invention discloses an alpine region asphalt core wall base and copper water stop strip collaborative anchoring and interface anti-seepage construction method, and relates to the technical field of hydraulic engineering, the method comprises the following specific steps: construction preparation and pretreatment: flushing and cleaning a dam foundation rock surface and an anti-seepage wall concrete surface in a corresponding range of a base; according to the method, through multi-layer interface treatment and rolling control, an anti-seepage structure adaptive to the low-temperature environment is successfully constructed, after the base concrete is cured, the periphery of the water stop piece is brushed with asphalt mastic, the top face of the base is preheated before an asphalt core wall is paved, and then the asphalt core wall is paved, so that the anti-seepage structure adaptive to the low-temperature environment is constructed; according to the method, the initial grinding temperature and the final grinding temperature of the asphalt mixture are controlled, and the two sides of the axis of the water stop strip are rolled through specific vibration rollers, so that the problems that microcracks are generated due to low-temperature shrinkage of an interface and crack propagation is aggravated due to the freezing and thawing cycle effect are effectively solved, and long-acting seepage prevention is achieved.

The invention provides a production process of an asphalt mastic macadam mixture, which comprises the following steps: S1, respectively putting asphalt and lignin fibers into a stirrer, and uniformly stirring to obtain asphalt slurry; s2, stone composed of coarse aggregate, fine aggregate and mineral powder is put into a mixing and stirring cylinder; s3, putting the asphalt slurry into the mixing and stirring cylinder, and mixing and stirring the asphalt slurry with the stone in the mixing and stirring cylinder to obtain an asphalt mastic macadam mixture; according to the production process of the asphalt mastic macadam mixture, traditional dry mixing is replaced by premixing of the asphalt and the lignin fibers, synchronous and continuous production can be achieved, the production period is shortened, energy consumption and equipment loss are reduced, meanwhile, the lignin fibers can be evenly dispersed in the asphalt to form high-quality asphalt slurry, and the quality of the asphalt mastic macadam mixture is improved. The mastic macadam mixture formed by mixing and stirring the asphalt slurry with the graded coarse aggregate, fine aggregate and mineral powder has stable performance, and can effectively avoid the problems of loose pavement, flooding and the like.

The application discloses a kind of skeleton dense type plant mixing hot regeneration asphalt mixture mix design method, it is related to road engineering technical field, including: selecting raw material;Raw material includes new additional aggregate and RAP, the performance detection is carried out to new additional aggregate, and extraction screening test is carried out to RAP;Mixture uses SAC skeleton dense type gradation, when mix design, raw material is divided into skeleton aggregate and filler, and the volume ratio of skeleton aggregate and filler is 70:30, then according to SAC skeleton aggregate gradation key screen hole passing rate calculation method and new additional aggregate screening result, RAP screening result carries out 4.75mm above coarse aggregate blending ratio calculation, when calculation, the blending ratio of RAP in raw material is consistent with the grading ratio of coarse and fine aggregate in RAP;Plant mixing hot regeneration asphalt mixture is subjected to Marshall test, and the adjustment of filler is carried out according to the size of measured porosity.The application can realize the uniform distribution of asphalt mortar in RAP, and improve the high-temperature rutting resistance of mixture.

This invention relates to the field of road engineering, specifically to a method for identifying the asphalt-mineral powder interface transition zone based on a dynamic shear rheometer. The method includes: preparing an asphalt-trichloroethylene solution; preparing asphalt mastic and separating free asphalt based on the asphalt-trichloroethylene solution and filtered mineral powder; performing a first elution on the asphalt mastic to obtain an asphalt sample; repeating the asphalt mastic elution process n times; determining the asphalt film thickness of each asphalt sample; conducting a dynamic shear rheological test on each asphalt sample; calculating and plotting the complex shear modulus master curve based on the complex shear modulus, the time-temperature equivalence principle, the WLF equation, and the CAM model; identifying the first asphalt sample whose complex shear modulus master curve shows a significant change trend relative to the previous eluted sample, and obtaining the asphalt-mineral powder interface transition zone thickness based on the asphalt film thickness of the asphalt sample with the significant change trend. This invention accurately identifies the thickness of the asphalt-mineral powder interface transition zone.

The invention relates to the technical field of waterproof casing pipes, and discloses a self-tightening closed casing pipe structure and a construction method thereof.The self-tightening closed casing pipe structure comprises a water pipeline and two end casing pipes, inner rings of the end casing pipes are matched with the outer diameter of the water pipeline, the two end casing pipes are arranged on the inner side and the outer side of the pool wall of a pool, and end sleeves are arranged on the inner sides of the two end casing pipes; an adjusting sleeve is arranged between the two groups of end sleeves, and two ends of the adjusting sleeve are respectively in threaded connection with the two groups of end sleeves; according to the self-tightening closed casing pipe structure and the construction method thereof, through the casing pipe structure composed of the end casing pipe, the end sleeve, the adjusting casing pipe, the inflatable sealing ring, the heat preservation gasket, the asphalt cement filler and the like, the casing pipe can be standardized and normalized, the construction difficulty is greatly reduced, large-area digging of concrete and cutting of steel bars are not needed, and damage to an original structure is reduced; and the self-compaction performance is good, a larger displacement space can be provided for deformation of the pipeline, and the better vibration buffering capacity is achieved for the pipeline connected with vibration equipment.

The invention discloses a novel asphalt mastic preparation device, and relates to the technical field of asphalt preparation. The heating assembly comprises an outer spiral coil pipe and an inner spiral coil pipe which are sequentially arranged from outside to inside, an inlet of the outer spiral coil pipe is communicated with the oil inlet in the side wall of the container tank body, an outlet of the outer spiral coil pipe is communicated with an inlet of the inner spiral coil pipe, and an outlet of the inner spiral coil pipe is communicated with the oil outlet in the side wall of the container tank body; the outer spiral coil pipe and the inner spiral coil pipe are used for conveying heat-conducting oil; the inner stirring assembly comprises a stirrer, the stirrer is located at the top of the container tank body, an output shaft of the stirrer extends into the container tank body and is located in the middle of the inner spiral coil pipe, and the output shaft of the stirrer is provided with a plurality of inner stirring blades. By adopting the scheme, the two layers of built-in spiral coil pipes are matched with heat conduction oil to efficiently transfer heat, so that the heating and mixing efficiency of the asphalt mastic is improved.

The present application relates to an electrically conductive asphalt mastic (ECAM) composition that includes an asphalt binder, a mineral filler, and a plurality of conductive carbon microfibers, between 3 and 12 mm in length, which are the sole source of electrical conductivity in the ECAM composition where the conductive carbon microfibers and the mineral filler are dispersed in the asphalt binder, and wherein said conductive carbon microfibers are present in the ECAM composition in an amount of less than 2.00% of total volume of the ECAM composition. The application further relates to an electrically conductive asphalt concrete (ECAC) composition that includes an asphalt binder, a mineral filler, an aggregate, and a plurality of conductive carbon microfibers, where the conductive carbon microfibers are the sole source of electrical conductivity in the electrically conductive asphalt concrete composition.

The invention belongs to the field of road engineering materials, and particularly relates to a multi-source solid waste regenerated anti-crack road base material and a preparation method thereof. The concrete is prepared from an oilstone dissociation type waste asphalt mastic gravel milling material, regenerated sand, waste concrete regenerated coarse aggregate, red mud, white mud, phosphorus slag powder, recycled mucilage powder, modified recycled fibers, waste tire rubber powder, an alkali activator, a chelating agent, a water reducing agent and water in proportion. According to the invention, resource utilization of construction wastes such as waste concrete can be promoted, and negative effects on the environment and land are reduced. Compared with a traditional base material, the base material has the advantages that efficient synergistic utilization of multi-source solid waste is achieved, resources are saved, pollution is reduced, the crack resistance is remarkably improved through the synergistic effect of the components, cracks caused by air shrinkage and temperature shrinkage are effectively inhibited, the service life of a road is prolonged, and a new technical support is provided for green and durable road construction.

This invention discloses a testing device and method for asphalt mastic adhesive samples, belonging to the field of engineering material testing technology, and can solve the problem that the adhesive properties of asphalt mastic cannot be specifically tested. The device includes: an adhesive strength tester, a steel plate, an asphalt mastic sample, and a pull-out block stacked sequentially from bottom to top. The pull-out block includes a pull-out base and a pull-out head; the pull-out base is located on the asphalt mastic sample; the adhesive strength tester is connected to the pull-out head and is used to test the adhesive sample. This invention can quantitatively evaluate the adhesive properties of asphalt mastic, including adhesive strength and failure type, providing a reliable basis for product development and quality control in the laboratory.

The invention discloses a fiber-free SMA asphalt concrete laying structure and a forming method thereof. The laying structure comprises a lower surface layer, a middle surface layer and an upper surface layer from bottom to top, the upper surface layer is composed of a non-fiber SMA-13 asphalt mixture, and the non-fiber SMA-13 asphalt mixture comprises an aggregate framework and composite modified asphalt mastic filled in gaps of the framework. The composite modified asphalt mastic is composed of mineral powder and PG88-22 composite modified asphalt, and the mixture completely does not contain any form of stable additive fibers such as lignin fibers, mineral fibers or polymer fibers. Through innovative design of a material system and accurate process control, the problems of stability and durability of fiber-free SMA are solved, and an asphalt pavement solution which is high in performance, long in service life, economical and environmentally friendly is provided.

The invention provides a steel bridge deck pavement method based on a magnetic force effect, which comprises the following three steps of: paving a magnetic response epoxy anti-sliding waterproof bonding layer on a steel bridge deck, then paving a magnetic epoxy resin asphalt concrete layer, and finally paving an asphalt mastic macadam mixture layer. The magnetic response epoxy anti-sliding waterproof bonding layer adopts the magnetic response epoxy adhesive cement and the aggregate to form an adhesive cement-aggregate-adhesive cement sandwich structure, and the strength and the shearing strength of the bonding layer are enhanced by means of the magnetic adsorption effect between the magnetic polymer microspheres and the magnetic blocks. The magnetic epoxy resin asphalt concrete layer also generates interlayer magnetic adsorption with the'adhesive cement-aggregate-adhesive cement 'sandwich structure through internal magnetic polymer microsphere-magnetic blocks, and the magnetic epoxy resin asphalt concrete layer and the'adhesive cement-aggregate-adhesive cement' sandwich structure jointly form a'double-magnetic effect functional layer 'and are tightly connected through the magnetic adsorption effect, so that the overall cohesiveness and anti-sliding performance of the pavement system are effectively enhanced, and the pavement system is suitable for being used in the field of pavement. The durability and the service life of the steel bridge deck pavement can be improved, and the driving safety is guaranteed.

This invention relates to a method for preparing and using acid-etched modified copper slag powder suitable for asphalt mastic. The invention aims to address the technical problems of existing methods for modifying copper slag powder for asphalt mastic, which are cumbersome, energy-intensive, and difficult to apply industrially. This invention selectively dissolves the iron oxide and iron silicate mineral phases on the surface of copper slag with dilute sulfuric acid, creating a rough, uneven microstructure on the surface of the copper slag particles. This significantly increases the specific surface area and interfacial contact area, thereby enhancing the mechanical interlocking and interfacial bonding with asphalt, effectively improving the high-temperature deformation resistance of asphalt mastic, and simultaneously realizing the resource utilization of industrial solid waste copper slag, possessing both environmental and practical value. The method of this invention is simple, easy to operate, requires no complex equipment, and can achieve industrial-scale mass production.

The invention relates to a preformed adhesive material for marking and a preparation method and application thereof, the preformed adhesive material comprises a reflective layer, a first bonding layer, a base material layer, a second bonding layer and a release film from top to bottom, the first bonding layer is a polyurethane pressure-sensitive adhesive, the base material layer is modified ultra-high molecular weight polyethylene, and the second bonding layer is asphalt mastic. The material has excellent comprehensive mechanical properties, the base material layer has high toughness, high wear resistance and flexibility so as to tolerate dynamic load and adapt to pavement deformation, and the double bonding layers of the polyurethane pressure-sensitive adhesive and the asphalt mastic are arranged, so that strong and lasting bonding with the pavement can be formed, stress can be effectively buffered and dispersed, interlayer failure is prevented, and the service life of the pavement is prolonged. Meanwhile, high and low temperature tolerance, weather resistance and aging resistance are achieved, and it is ensured that the performance is stable under the wide temperature range and severe conditions.