41results about How to "Good anti-rutting performance" patented technology

The invention discloses a polyurethane high-temperature-resistant anti-rutting modifier for road asphalt. The modifier comprises the following components in parts by the total weight of the modifier: 25-65 parts of one or two or more of diisocyanate, polyaryl polymethylene isocyanate and diisocyanate derivatives, 15-60 parts of one or two or more of polymer polyol and polymer polyamine, 2-15 parts of one or two or more of micromolecular polyol chain extender, micromolecular polyamine chain extender and micromolecular polyatomic acid chain extender, 0.01-3 parts of organic polyurethane catalyst, and 0-45 parts of poly-alkadiene polymer compound with a number-average molecular weight of 500-50000. The modifier can greatly improve the high-temperature resistance and anti-rutting properties of matrix asphalt and modified asphalt; and prepared modified asphalt is balanced in high and low-temperature performances, good in compatibility with matrix asphalt, and stored stably.

The invention discloses a high-viscosity modified asphalt material. The asphalt material is prepared from the following raw materials in parts by mass: 100 parts of matrix asphalt, 4-7 parts of a thermoplastic elastomer, 4-10 parts of waste rubber powder or an ethylene-vinyl acetate copolymer, 1-3 parts of a plasticizer, 2-4 parts of thermoplastic resin, 3-5 parts of a solubilizer, 0.2-2 parts ofa stabilizer, 0.5-1.5 parts of a chemical modifier and 0.2-0.7 part of polypropylene glycol. Through the high-viscosity modified asphalt material, the storage stability of high-viscosity modified asphalt is improved; meanwhile, high-temperature viscosity of the high-viscosity modified asphalt is reduced; when the high-viscosity modified asphalt material is applied to mixing of asphalt mixture, themixing temperature is low; the high-viscosity modified asphalt material is easy to construct, low in cost and simple in preparation method.

The invention aims to provide an asphalt modifier and a preparation method thereof, which overcome the disadvantages of nonuniform modification, serious pollution and hidden danger caused by adding rubber powder into asphalt and solve the technical problem of the modification and prefabrication of the rubber powder. The invention provides the asphalt modifier. The asphalt modifier is characterized by comprising the following components of: tire rubber powder, polyethylene, silicon dioxide and rubber oil, wherein the components are stirred, heated, extruded, cooled and cut to obtain plasticized rubber sticky particles, namely the asphalt modifier. The plasticized rubber sticky particle product of the invention greatly reduce high-temperature processing and pollution of rubber asphalt; the produced rubber asphalt sticky particles are a directly thrown type novel internal modification material and can be directly thrown into the asphalt and stones for mixing; and the asphalt modifier is odorless, can reduce secondary pollution, and has better meltability than that of rubber powder modified asphalt. The rubber asphalt particles are black sticky particles and are easy to package and transport.

The invention provides a cold mixing epoxy asphalt repairing material and a preparation method. The cold mixing epoxy asphalt repairing material comprises a part A and a part B; the part A comprises the following components by weight: 100 parts of asphalt, 5-50 parts of epoxy asphalt diluents, 10-50 parts of epoxy asphalt compatibilizer and 5-50 parts of epoxy asphalt curing agent; the part B comprises the following components by weight: 40-100 parts of epoxy resin and 5-50 parts of epoxy resin diluents, wherein the weight ratio of the part A to part B is 0.5-5: 1. In the invention, epoxy asphalt repairing material has better construction fluidity under room temperature, and easily penetrate into the pavement cracks for repairing; and can be stirred under normal temperature for usage without heating and insulation transportation.

The invention discloses a foamed asphalt cold-regenerating structural layer mixture. The foamed asphalt cold-regenerating structural layer mixture is prepared from the following materials of a mineral aggregate, cement, an anti-stripping agent, mixing water, foamed asphalt and fiber. The mineral aggregate is composed of the following materials of, by mass, 30-40 parts of a milling-planing old material with the grain diameter being 10-30 mm, 35-45 parts of a milling-planing old material with the grain diameter being smaller than 10 mm, 2-8 parts of new aggregated rock with the grain diameter being 10-30 mm, 10-20 parts of new aggregated rock with the grain diameter being smaller than 10 mm and 4-6 parts of pulverized fuel ash. The dosage of the cement is 1.5-2.5% of the total dosage of the mineral aggregate, the mixing amount of the anti-stripping agent is 0.4-0.6% of the total dosage of the mineral aggregate, and the dosage of the mixing water is 4-5% of the total dosage of the mineral aggregate, the dosage of the foamed asphalt is 2.5-3.5% of the total dosage of the mineral aggregate, and the total mixing amount of the fiber is 0.35-0.45% of the total dosage of the mineral aggregate. The invention further discloses a construction method of the mixture. After construction of the foamed asphalt cold-regenerating structural layer mixture is conducted, a road can has good water stability and anti-rutting performance; and the road maintenance or transformation cost is reduced, the construction period is shortened, and the time of traffic stop is reduced.

The invention provides an improved construction method of an old cement concrete pavement. The improved construction method comprises the following steps: disposing an old cement pavement disease and performing chiseling on the pavement surface; uniformly paving and spreading a layer of rubber modified emulsified asphalt mixture, and grinding on the old cement concrete pavement to form a crack inhibition function layer; paving a large-void asphalt mixture on the crack inhibition function layer; pouring cement mortar into the large-void asphalt mixture after the temperature of the large-void asphalt mixture is reduced to be under 50 DEG C, scraping the surface laitance with a brush to expose an aggregate structure after the large-void asphalt mixture is fully poured, and maintaining to open the traffic. The pavement constructed by the method can fully inherit the bearing capacity of the original cement concrete and has excellent anti-rutting performance and anti-fatigue performance, no lapped seam is formed on the pavement, the anti-sliding performance of the pavement is enhanced, the running safety is improved greatly and the improved construction method has wide application prospect.

The invention provides an epoxy asphalt compatibilizer preparation method and a usage method. The preparation method comprises the following steps: unsaturated aliphatic carboxylic acid and polyatomic alcohol are subjected to an esterification reaction, and then the product is subjected to hydrogen peroxide epoxidation to obtain the epoxy asphalt compatibilizer. An epoxy asphalt material comprises a part A and a part B, the part A comprises the following components by weight: 100 parts of asphalt, 5-50 parts of asphalt diluents, 10-50 parts of epoxy asphalt compatibilizer and 5-50 parts of epoxy asphalt curing agent; the part B comprises the following components by weight: 40-100 parts of epoxy resin and 5-50 parts of epoxy diluents; wherein the weight ratio of part A to part B is 0.5-5: 1. According to the invention, a nonpolar carbon chain in an epoxy asphalt compatibilizer molecular chain is effectively compatible with asphalt, an epoxide group is effectively compatible with epoxy resin, and is subjected to a crosslinking reaction with an epoxy asphalt curing agent, so that mechanical strength and stability of the epoxy asphalt material can be increased.

The invention discloses an anti-rut pavement paving method capable of continuously paving a base layer and a surface layer, and belongs to the field of road engineering. The method is characterized inthat a super-early-strength anti-cracking cement stabilized macadam base layer is paved firstly, and after the base layer is rolled, a cold-mixed cold-paved rigid-flexible composite surface layer ispaved under the condition that the surface is still in a wet state. Compared with the prior art, according to the anti-rut pavement paving method capable of continuously paving the base layer and thesurface layer, continuous paving of the cement stabilized macadam base layer and the surface layer can be realized; maintenance time for 7 days of the cement stabilized macadam base layer can be omitted, meanwhile, the continuity of the base layer and the surface layer is improved, the overall cooperative stress of the pavement structure is guaranteed, a permeable layer and a macadam sealing layerdo not need to be sprayed on the surface of the cement stabilized macadam base layer, and the construction cost is reduced. Meanwhile, the cold-mixed and cold-paved rigid-flexible composite surface layer does not need centralized hot mixing, so that construction is convenient, resources are saved, and the environment is protected. The anti-rutt pavement structure with the base layer and the surface layer capable of being continuously paved has high high-temperature anti-rutting performance, anti-cracking performance, water stability and durability, and has high popularization and applicationvalues.

The invention discloses a method for preparing a plastic warm-stirred modified asphalt mixture, which comprises the steps of: taking asphalt, aggregate, warm-stirred modifier and ethylene-vinylacetate copolymer colloidal particles as raw materials, putting the aggregate preheated to 160 DEG C into a blender, adding the ethylene-vinylacetate copolymer colloidal particles and dry blending, and then adding 145-DEG C hot melted asphalt and warm-stirred modified asphalt for stirring to acquire the plastic warm-stirred modified asphalt mixture. The raw materials are in the following parts by mass: 100 parts of aggregate and 4.5-5.5 parts of asphalt, wherein the mass part of the warm-stirred modified asphalt is 0.09-0.12 time that of the asphalt and the mass part of the ethylene-vinylacetate copolymer colloidal particles is 0.06 to 0.10 time that of the asphalt. The plastic warm-stirred modified asphalt mixture can be used for bituminous pavements with extra heavy traffic volumes, has all better technical indexes compared with the common bituminous pavement, is economic and environment-friendly, and has better water damage resistance property and track resistance property.

The invention provides an interface enhancer for watering-type pavement material preparation, and the interface enhancer is prepared from the following components in parts by weight: 10-25 parts of acrylic monomer, 5-12 parts of organosilane, 0.2-3 parts of a surfactant and 0.04-0.04 part of an accelerant. The invention also provides a method for preparation of a watering-type pavement material by used of the interface enhancer. The interface enhancer can increase the surface interface bonding power between a cement-based grouting agent and an asphalt mixture, the problems of insufficient crack resistance and poor durability caused by the poor surface interface bonding property of asphalt and cement mortar are solved, and the interface enhancer has obvious economic benefits and application values.

The invention discloses a high-viscosity anti-rut modified asphalt for an ultrathin overlay and a preparation method thereof, and belongs to the technical field of road maintenance. The modified asphalt is prepared from 100 to 110 parts of matrix asphalt, 25 to 30 parts of waste tire rubber powder pretreated by a silane coupling agent, 5 to 8 parts of SBS and 1 to 3 parts of DOMIX. The softening point (DEG C) of the prepared high-viscosity anti-rut modified asphalt is 85.7, the needle penetration (25 DEG C, 0.1 mm) is 23.5, the ductility (5 DEG C, 5cm/min) is 29.6, the elastic recovery (%) is89.0, and the dynamic viscosity (60 DEG C, Pa.s) is 203528. The asphalt has excellent high-temperature stability, low-temperature crack resistance, viscosity, self-healing property and economical efficiency; and the preparation method is simple, green and efficient, can be used for large-scale batch production in construction sites and factories, can adapt to various engineering application requirements, and has important significance for promoting application and popularization of preventive maintenance technologies such as ultrathin overlay and the like in new construction and maintenance ofasphalt pavements in China.

The invention discloses an anti-rut agent for cool mixing and cool spreading of an asphalt road. The anti-rut agent mainly comprises a high-rigidity normal-temperature asphalt blend and a concentrated curing agent, wherein the curing agent and the normal-temperature asphalt blend are cured to form reinforced fibers, and a polymer and the curing agent have chemical bonding, thus the interfacial binding is also strengthened, and the interfacial fracture energy can be improved, therefore, the overall toughened, high-strength and consistent gel structure can be formed by modifying the normal-temperature asphalt. In addition, the different amounts of the curing agents have certain impact on demulsification of the asphalt blend. The usage amounts of the curing agent and the emulsifier can be selected according to the construction requirements, and the demulsification time can be controlled so as to guarantee the successful running of the construction.

The invention discloses a warm-mix anti-furrow agent for enhancing high-temperature stability of an asphalt pavement. The warm-mix anti-furrow agent comprises the following materials in parts by weight: 10-50 parts of organic compound, 10-60 parts of modified low-density polyethylene, 5-35 parts of high-density polyethylene and 0-5 parts of assistant. The invention also discloses a production method of the warm-mix anti-furrow agent for enhancing the high-temperature stability of the asphalt pavement. The method comprises the following steps: modifying the low-density polyethylene; mixing the organic compound, the modified low-density polyethylene, the high-density polyethylene and the assistant; extruding out a cylindrical semi-finished product by a screw extruder; and grinding to obtain a finished product. The warm-mix anti-furrow agent as an asphalt additive has good anti-furrow property under the conditions that the heating temperature of aggregate and blending temperature of an asphalt mixture and that the paving and grinding temperatures are less than 20 DEG C, so that organic combination of warm mix and anti-furrow properties is realized.

The invention discloses a low-carbon rapid maintenance and pavement method for asphalt pavement ruts. The method comprises the following steps: (1), milling an asphalt surface layer; (2), paving a super-viscous emulsified asphalt macadam sealing layer; and (3), paving the surface layer of the cold-mixing and cold-paving pouring type composite pavement. The combined pavement layer obtained by the method has the characteristics of excellent rut resistance, simple maintenance process and environmental protection, and the whole structure has the characteristics of high rut resistance, skid resistance, wear resistance, long service life and low carbon.