9results about How to "Improve road performance" patented technology

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 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.

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.

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.