23results about How to "Improve road performance" patented technology

The invention belongs to the technical field of road engineering materials, and discloses a wide-temperature-range crack pouring adhesive based on rubber modified asphalt and a preparation method thereof.The wide-temperature-range crack pouring adhesive is prepared by taking the rubber modified asphalt as a matrix through a response surface method and adding SBS, basalt fibers and a modifier. The performance of the material is tested through a conventional test, and meanwhile, a test with more characteristics in northeast regions is provided, and the performance of the material is detected through injection depth, viscosity, low-temperature stretching after aging and freeze-thaw cycle stretching. Results show that a test designed by a response surface method has very strong reliability, and the modified heating type crack pouring adhesive added with the basalt fiber can significantly improve the high and low temperature performance of the crack pouring adhesive, and also has good anti-aging performance and freeze-thaw cycle resistance. And the filling depth and the viscosity of the sealant are not obviously lower than those of the same type of sealant.

The invention discloses magnetic asphalt concrete for an electromagnetic induction wireless charging pavement as well as a preparation method and application of the magnetic asphalt concrete, and belongs to the field of road engineering materials and road infrastructures. The magnetic asphalt concrete is prepared from the following raw materials in parts by weight: 8 to 12 parts of magnetic micro powder, 5.5 to 6.5 parts of asphalt, 50 to 75 parts of coarse aggregate, 20 to 40 parts of fine aggregate and 0.1 to 0.2 part of coupling agent, wherein the magnetic micro powder is prepared by mixing magnetic separation steel slag and a solid waste admixture, calcining, ball-milling to obtain magnetic coarse powder, mixing with a composite dispersant, and ball-milling at a high speed; the composite dispersing agent is a mixture of triethanolamine, glycerol and oleic acid. The magnetic asphalt concrete has good adhesion performance and pavement performance, can enhance the adhesion and interlayer mechanical strength of an asphalt concrete surface layer and a charging device when being used for a wireless charging pavement, greatly improves the charging efficiency, prolongs the service life of the pavement, and has a good application prospect.

The invention relates to the technical field of road materials, in particular to a preparation method of high-elasticity rubber powder composite modified cold-mixed asphalt. The preparation method comprises the following steps: mixing matrix asphalt, high-elasticity rubber powder, an SBS (Styrene Butadiene Styrene) modifier, a cross-linking agent, an activating agent and polyurethane microcapsules; wherein the polyurethane microcapsule takes polyurethane as a shell layer and an asphalt regenerant as a core material, and when the shell layer is prepared, chitosan, sodium lignin sulfonate, acrylamide, trifluoroethyl acrylate and acrylic acid react to obtain composite powder; the prepared cold-mixed asphalt mixture can be mixed and paved at normal temperature / low temperature, and after paving, the high-elasticity rubber powder and the matrix asphalt are fully swelled to form a modified asphalt cementing material, so that the high-temperature stability of the cold-mixed asphalt mixture is enhanced, and the strength of a cold-mixed asphalt pavement is improved. In addition, the cold-mix asphalt waterproof coating has good self-healing performance at the room temperature, and the requirement for timely traffic of a cold-mix asphalt road is met.

The invention relates to water-permeable colored asphalt concrete and a preparation method thereof, and belongs to the technical field of asphalt concrete.The water-permeable colored asphalt concrete is composed of colored modified asphalt and aggregate, and the mass ratio of the colored modified asphalt to the aggregate is (1-2): 10. The colored modified asphalt is composed of road petroleum asphalt, modified calcium carbonate whiskers, modified rubber powder, a composite anti-stripping agent and an inorganic pigment. According to the permeable colored asphalt concrete prepared by the invention, the Marshall stability is 8.39 to 8.91 kN, the compressive strength is 57.9 to 64.5 MPa, the water stability RMS is 97.5 to 98.4 percent, the TSR is 95.2 to 97.0 percent, the porosity is 18.4 to 21.6 percent, and the permeability coefficient is 61 to 70 mm / s.

The invention relates to the technical field of road asphalt modification, in particular to an asphalt modifier containing polyethylene and an asphalt mixture prepared from the asphalt modifier. The asphalt modifier containing polyethylene comprises the following components in parts by weight: 8-15 parts of matrix asphalt, 30-50 parts of coal liquefied asphalt, 30-50 parts of pretreated rubber powder, 1-4 parts of a solubilizer, 1-4 parts of a plasticizer and 2-4 parts of waste polyethylene plastic. The asphalt modifier containing polyethylene also comprises a component A: 0.3-3.0 parts by weight of modified basalt fiber. The asphalt modifier containing polyethylene is prepared through a mixing technology, compared with a traditional modifier, basic raw materials of the asphalt modifier are completely derived from solid waste resources, resource utilization of waste is achieved, and the preparation process is simplified.

The invention relates to the technical field of preparation of modified asphalt, in particular to SBS modified asphalt and a preparation method thereof. The SBS modified asphalt provided by the invention is prepared from the following raw materials: matrix asphalt, a linear SBS modifier 791H, a star SBS modifier 4306 and an auxiliary agent, the auxiliary agent is selected from one or two of aromatic oil, naphtha, a stabilizer and furfural extract oil. The modified asphalt prepared by the invention has high storage stability and ageing resistance, the high-temperature performance and water stability are remarkably improved, and the overall performance is better than that of linear SBS modified asphalt. According to the high-stability SBS modified asphalt disclosed by the invention, the storage stability problem is solved, various properties and pavement performance of the SBS modified asphalt are integrally improved, and the high-stability SBS modified asphalt is simple and convenient to prepare, short in processing flow, simple in equipment, mild in process condition, rapid in production and low in modification cost.

The invention belongs to the technical field of asphalt pavement materials, and relates to dynamic crosslinking waste polyolefin plastic modified asphalt which comprises the following components in parts by weight: 100 parts of matrix asphalt and 5-30 parts of dynamic crosslinking waste polyolefin plastic, the dynamic crosslinking waste polyolefin plastic is prepared from the following components in parts by weight: 100 parts of waste polyolefin plastic, 2 to 6 parts of maleic anhydride, 2 to 6 parts of bisphenol A and 0.2 to 0.6 part of dicumyl peroxide. The problems that in the prior art, waste utilization is insufficient, and asphalt performance improvement is not remarkable are solved, dynamic covalent bonds are introduced into asphalt modification through formation of the dynamic covalent bonds in the dynamic crosslinking waste polyolefin plastic, good pavement performance is achieved, and meanwhile, based on reversibility of the dynamic covalent crosslinking structure, the asphalt performance is improved. And the modified asphalt is endowed with good reprocessability.

The application discloses a high-doped phosphogypsum pavement base material and a preparation method thereof, and belongs to the field of pavement base materials. The material comprises, by weight, 7-9 parts of a binding agent, 30-45 parts of phosphogypsum artificial fine aggregate, 45-60 parts of phosphogypsum artificial coarse aggregate and 0.05-0.1 parts of water glass; wherein the binding agent is formed by mixing 3.5-4.5 parts of phosphogypsum, 3-3.5 parts of slag powder, 0.3-0.7 parts of cement and 0.2-0.3 parts of phosphorus slag powder. The phosphogypsum artificial aggregate is prepared by mixing phosphogypsum, slag powder, cement, a performance regulator, water and a water reducing agent, and then pouring, curing, crushing, shaping and screening. The preparation method of the material comprises three steps of pretreating aggregate, mixing materials and shaping and curing. The application realizes high-doped utilization of phosphogypsum, solves the technical problems that the utilization rate of phosphogypsum and the road performance cannot be simultaneously considered and the construction convenience is poor in the current phosphogypsum pavement base material, and the obtained material has good road performance.

The invention discloses a soil solidifying agent and a preparation method thereof, and belongs to the technical field of soil solidifying agents in highway engineering. The soil solidifying agent is mainly composed of the following components: 5% to 10% of steel slag powder, 10% to 20% of slag powder, 50% to 70% of quicklime blocks, 5% to 10% of waste gypsum, 2% to 5% of activator, and 5% to 10% of desulfurized ash. The initial setting time of the soil solidifying agent is about 12 hours, and the effective working time exceeds 24 hours. It is particularly suitable for the situation of uneven soil moisture, and is convenient for local re-pressing of the compacted surface on site, thereby improving the overall quality of construction; its unconfined compressive strength and CBR value are higher than those of soil solidified by cement, and it can replace traditional cement, lime, etc. for roadbed treatment in engineering, thereby improving the quality of engineering.

The present invention belongs to the technical field of modified asphalt, and specifically relates to a regenerated natural polymer-based solid-solid phase change fiber and its preparation method and application. The present invention uses natural polymer materials as raw materials, obtains natural polymer-based solid-solid phase change materials by chemical grafting with phase change materials, and obtains regenerated natural polymer-based solid-solid phase change fibers by solution spinning. Phase change materials have latent heat properties and can store heat and regulate temperature. Phase change fibers are added to asphalt. When the ambient temperature rises to its phase change temperature, the phase change fibers absorb a large amount of heat and store it, improving the high temperature stability and durability of asphalt and asphalt mixtures, and can reduce high temperature diseases of the road surface while improving road performance; when the ambient temperature drops to its phase change temperature, the phase change fibers release a large amount of heat, improve the low temperature resistance and low temperature stability of the road surface, reduce low temperature cracks, and improve the temperature stability of asphalt through phase change fibers.

The invention belongs to the technical field of road engineering materials, and particularly relates to a preparation method of rubber powder modified asphalt and a preparation method and application of a rubber powder modified asphalt mixture. The method comprises the following steps: (1) mixing waste tire powder with a desulfurizing agent for desulfurization treatment, mixing the desulfurized powder with a silane coupling agent alcohol solution, and drying to obtain surface modified rubber powder; the dosage of the silane coupling agent is 3-5 wt% of the desulfurized powder; (2) melting and blending 10-15 parts by weight of SBS and 3-5 parts by weight of butyl rubber, adding 5-8 parts by weight of nano calcium carbonate and 1-2 parts by weight of an antioxidant, and mixing to obtain a composite modifier; and (3) based on 100 parts of matrix asphalt, melting the matrix asphalt, carrying out high-speed shear mixing on 15-25 parts of the surface modified rubber powder, adding 5-10 parts of the composite modifier and 2-4 parts of the compatilizer, and carrying out high-speed shear mixing to obtain the rubber powder modified asphalt.

The present invention relates to the technical field of polymer composite materials, and discloses an asphalt pavement anti-rutting modifier and its preparation method and application, which is composed of the following raw materials in parts by weight: 100 parts of carbon nanotube-loaded basalt fiber hybrid, 20-50 parts of organic wax warm mix, 0.5-1 parts of dispersant, and 0.5-1 parts of antioxidant: step one, basalt fiber degumming: putting basalt fiber into a heating furnace, heating to 300°C, keeping warm for 1h, and removing its surface impregnant; step two, preparation of catalyst-loaded basalt fiber; step three, preparation of carbon nanotube-loaded basalt fiber hybrid. The basalt fiber in the asphalt pavement anti-rutting modifier provided by the present invention has a high specific surface area, has a high temperature resistance effect on asphalt, and the interconnection between carbon nanotubes can construct a three-dimensional network in asphalt, improve the interface compatibility between basalt fiber and asphalt matrix, and improve the high temperature anti-rutting performance and permanent deformation resistance of the modified asphalt composite material.

The present invention provides a quick remedial material for potholes in asphalt concrete pavement and a preparation method thereof, which belongs to the technical field of asphalt pavement repair materials. The preparation method comprises: providing a liquid material, the liquid material comprises road petroleum asphalt, an emulsifier aqueous solution, a polymer resin and a nano-additive material; providing a solid material, the solid material comprises aggregate and cement; providing a mixing device, so that the liquid material and the solid material are in contact in the mixing device, and are stirred and mixed evenly, so as to obtain the quick remedial material for potholes in asphalt concrete pavement; the mass of the liquid material is 5-20% of the mass of the solid material. The quick remedial material of the present invention has a short setting time, high strength, strong adhesion between the new and old interfaces, no need to add water during mixing, no need to close traffic during construction, and traffic can be opened immediately after construction. It can be mixed and used at room temperature, is not affected by air temperature and environment, has no toxic gas discharge, is safe and environmentally friendly, and has lower production cost.

This invention relates to a concrete paving brick made from oily sludge pyrolysis residue. It is prepared by mixing 86%–90% standard concrete and 10%–14% oily sludge pyrolysis residue by weight. Silicate cement, fine aggregate, and water are added to a mixer according to the standard concrete weight ratio. After the mortar has fully coated the inner wall of the mixer, it is poured out. The following steps are taken: Fine aggregate, cement, coarse aggregate, fine aggregate, and water are weighed according to a weight ratio of 16:51:25:8. The coarse aggregate, fine aggregate, and residue are added first and mixed. Cement is then added and mixed again. Half the water and water-reducing agent are added and mixed. The water-reducing agent dosage is 0.7% of the unit cement weight. Finally, the remaining water is added. The mixture is then molded and cured to obtain the oily sludge pyrolysis residue concrete paving brick. This invention achieves high-value utilization of oily sludge pyrolysis residue and reduces carbon emissions from concrete production.

The present application relates to a kind of recycled asphalt warm mix agent and its warm mix recycled asphalt mixture and preparation method, recycled asphalt warm mix agent, including two components of warm mix agent and reagent;The raw material of warm mix agent includes solvent, viscosity reducer and surfactant with mass ratio of 100:(13-20):(3.5-5), wherein the solvent is the mixture of elaidic acid and tung oil acid;Reagent is the powder obtained by calcining treatment of calcium carbonate.Warm mix recycled asphalt mixture includes mixture A, 0.65-1% of warm mix agent in the mass of mixture A, 1-2% of reagent in the mass of mixture A, and 1.5%-4.0% of asphalt in the mass of mixture A;Mixture A includes aggregate, RAP and mineral powder with mass ratio of 100:(40-150):(1-10).The present application can reduce construction temperature by more than 50 DEG C.

The application discloses a stress luminescence type chemical anchoring fog seal layer material with blackening and wear resistance functions and a construction method thereof, and relates to the technical field of pavement engineering pre-maintenance. The fog seal layer material is prepared from near-neutral non-ionic emulsified asphalt as a stable reaction matrix, high-carbon black content activated latex slurry is introduced to realize blackening and network enhancement of the asphalt pavement, the interface bonding and mechanical-optical response triggered by traffic load are realized through core-shell structure stress luminescence particles, and the interface chemical anchoring reaction is triggered when the demulsification of the interface catalytic anti-skid aggregate. The components play a synergistic effect in the storage, construction and service stages, and finally form a reinforced seal layer with stress luminescence visual guidance, high blackness, high anti-skid and long-term durability functions on the pavement, and the application is especially suitable for improving the road traffic safety in dark environments such as tunnels and road sections without street lamps.

The invention belongs to the technical field of fiber reinforced composite materials, and relates to a preparation method of modified basalt fibers, the modified basalt fibers and application, the preparation method comprises the following steps: S1, placing the basalt fibers in a reactor, and introducing silicon tetrafluoride gas for etching treatment to obtain etched basalt fibers; s2, performing radio frequency magnetron sputtering treatment by taking the etched basalt fiber as a substrate and titanium dioxide or zirconium dioxide as a target material, and then performing annealing treatment to obtain surface coating basalt fiber; and S3, immersing the surface-coated basalt fiber into an impregnating compound, taking out the surface-coated basalt fiber, and drying and curing the surface-coated basalt fiber to obtain the modified basalt fiber. According to the method, after the modified basalt fiber is applied to the asphalt concrete, the key performance indexes of the asphalt concrete can be remarkably improved.

The invention discloses a non-stick wheel emulsified asphalt with a thin layer of overlay tack oil based on asynchronous construction and a preparation method thereof, and relates to the technical field of pavement asphalt materials. The raw material ratio is as follows by mass percentage: SBS and base asphalt 50% to 55%, cosolvent 0.1% to 0.5%, emulsifier 0.4% to 1.0%, stabilizer 1.0% to 2.0%, thickener 0.3% to 0.5%, water-based high molecular polymer 4% to 10%, and the balance is water. Preparation method: firstly, SBS modifier and cosolvent are added to base asphalt to prepare modified asphalt, then emulsifier, stabilizer and thickener are added to water to prepare soap solution, then asphalt and soap solution are dispersed and ground to prepare emulsified modified asphalt; finally, water-based high molecular polymer material is added to emulsified modified asphalt to prepare high-performance non-stick wheel emulsified asphalt. The invention breaks through the technical difficulty that hard asphalt is not easy to emulsify, improves road performance and achieves non-stick wheel at the same time.

The invention discloses a cold-mixed and cold-laid colored asphalt mixture. The cold-mixed and cold-laid colored asphalt mixture is a skeleton dense type asphalt mixture; the cold-mixed and cold-laid colored asphalt mixture is prepared from the following components in percentage by mass: 10 to 13 percent of light-colored high-viscosity modified emulsified asphalt, 45 to 54 percent of first light-colored coarse aggregate of 5 to 8 mm, 18 to 23 percent of second light-colored coarse aggregate of 3 to 5 mm, 13 to 27 percent of light-colored fine aggregate of 0 to 3 mm, 2 to 4 percent of toner and 1 to 2 percent of cement, the softening point of the light-color high-viscosity modified emulsified asphalt is greater than 80 DEG C, the dynamic viscosity at 60 DEG C is greater than 30000 Pa.s, and the elastic recovery at 25 DEG C is greater than 92%. The cold-mixed and cold-laid colored asphalt mixture provided by the invention is relatively high in strength, high-temperature stability and low-temperature crack resistance, and the technical problems of relatively poor pavement performance and color durability of a colored asphalt pavement formed by laying the existing cold-mixed and cold-laid colored asphalt mixture are effectively solved.

This invention provides an asphalt pavement structure, comprising, from bottom to top: a subgrade, a subbase, a semi-rigid base course, a hot-dip asphalt synchronous chip seal, a first asphalt-stabilized chip seal layer, and an asphalt surface layer. The first asphalt-stabilized chip seal layer has a porosity greater than or equal to a first preset threshold, and its maximum nominal particle size falls within a first range. The thickness of the first asphalt-stabilized chip seal layer is greater than or equal to a second preset threshold. The cross slope between the semi-rigid base course and the hot-dip asphalt synchronous chip seal is K times the designed cross slope of the asphalt surface layer, where K is greater than 1. Through this method, the asphalt pavement structure of this invention can suppress reflective cracking and prevent water damage, substantially improving the road performance and service life of the semi-rigid base asphalt pavement.

The invention discloses modified asphalt and a preparation method thereof. The modified asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt; 0.5 to 4 parts of a solubilizer; 4-6 parts of a polymer modifier; 4-8 parts of a high-viscosity modifier; 0.5 to 1 part of modified composite fiber; and 0.2 to 0.4 part of a stabilizing agent. The modified asphalt has the characteristics of high viscosity and high elasticity, and the low-temperature performance and the storage stability of the asphalt can be improved.

The present application relates to the technical field of asphalt mixture, in particular to an environment-friendly modified asphalt mixture and a preparation method thereof.The present application discloses an environment-friendly modified asphalt mixture, which is prepared from waste asphalt mixture, aggregate, mineral powder, new asphalt and asphalt modifier; wherein the asphalt modifier comprises waste tire rubber powder, epoxy soybean oil and self-made lignin-based modifier.The present application uses solid waste raw materials such as waste asphalt mixture and waste tire rubber powder, realizes recycling and utilization of waste building materials, is green and environment-friendly, and effectively reduces production cost; the lignin-based modifier used can effectively improve the anti-aging performance of waste asphalt, and improve the adhesion, stability and comprehensive road performance of the asphalt mixture.The present application takes into account resource recycling and engineering use value, and is suitable for various road paving engineering.

The invention provides a high-toughness ultrathin asphalt overlay and application. The high-toughness ultrathin asphalt overlay comprises an interlayer binding material and an asphalt mixture, the preparation method of the interlayer binding material comprises the following steps: adding the anionic emulsifier into water, heating at 70-80 DEG C, adding the matrix asphalt and the high-viscosity modifier, and grinding by using a horizontal colloid mill to obtain high-performance modified emulsified asphalt, namely the interlayer binding material. The asphalt mixture is prepared from 5.3 to 5.9 percent of ultrahigh-viscosity modified asphalt and the balance of aggregate; the aggregate is prepared from 69.8 to 78.8 percent of coarse aggregate, 15.9 to 20.7 percent of fine aggregate and the balance of filler. According to the invention, the high-performance modified emulsified asphalt is used as an interlayer binding material, the ultrahigh-viscosity modified asphalt is used as an overlay material, the mixing proportion design is carried out on the ultra-thin ultrahigh-viscosity modified asphalt mixture, and the performance and asynchronous construction technology research is carried out, so that not only is the actual engineering value realized, but also the construction cost is reduced. And guiding significance and reference value can be generated for research and construction of preventive maintenance materials for asphalt roads.