42results about How to "Extended construction season" patented technology

The invention discloses a method for preparing a cold-mixed cold-laid asphalt mixture by utilizing papermaking waste liquor and a construction method. The method for preparing the cold-mixed cold-laid asphalt mixture comprises the following steps: mixing the papermaking waste liquor or lignin with sodium sulfite to prepare a papermaking waste liquor mixed solution; preparing an ore mixed material according to a mix proportion at normal temperature, adding into a stirring tank of a stirrer, and dry-mixing for 10-20 seconds; adding the papermaking waste liquor or lignin mixed solution, mixing for 25-35 seconds to ensure that the surface of the ore material is uniformly wetted; adding modified emulsified asphalt and mixing for 58-63 seconds to prepare a cold-mixed cold-laid modified emulsified asphalt mixture. The transportation time is determined in a way that the amount of the added papermaking waste liquor mixed solution or the mixed solution of lignin extracted from the papermaking waste liquor can be regulated according to transportation distance; the spreading speed in the construction is controlled to be 4m / min to 5m / min; rolling is started immediately after the emulsion is demulsified; the cold-laid road surface is controlled to be in use within 2-6 hours according to different laying thickness.

The invention relates to an asphalt warm-mix agent, comprising the following components in percentage by weight: 1.0-2.0% of alkylamine type cationic surfactant, 3.0-5.0% of amide type cationic surfactant, 5.0-10.0% of ammonium salt type cationic surfactant, 1.01.5% of calcium chloride, and water with residual percentage. The invention also relates to an asphalt mixture with the pavement applicability basically same as the traditional hot-mix asphalt mixture and the mixing and construction temperature lower than 20-50 DEG C; the purposes of energy saving, emission reduction, longer construction season, asphalt aging reduction and easier compaction are realized by reducing the mixing temperature; the indexes of the compaction degree, the water stability, the high-temperature performance, the low-temperature performance and the like of the pavement after paving the asphalt are not lower than those of hot-mix asphalt mixture at the same stage; and the service life of the asphalt pavementis efficiently guaranteed.

The invention discloses a warm-mixed asphalt additive and a preparation method thereof. The additive is prepared by the following steps: adding deionized water into prepared polyvinyl alcohol water solution, then adding rosin quaternary ammonium salt, aromatic quaternary ammonium salt emulsifier, aliphatic quaternary ammonium salt emulsifier and nonionic surfactant into the water solution in turn, stirring and dissolving the mixture, adding prepared polyacrylamide water solution and triethanolamine into the mixture, and mixing and stirring the mixture till the mixture is evenly dissolved so as to obtain a finished product. During application, when the temperature of the asphalt mixture reaches 110 to 130 DEG C, 5 percent of the diluent of the additive is added by the mass of asphalt in a spraying mode so as to realize the warm mixing technology of mixing and spreading the asphalt mixture; and test data show that various road indexes of the warm-mixed asphalt mixture are not lower thanthat of hot-mixed asphalt mixture under the condition that the mixing and molding temperature of the warm-mixed asphalt mixture is obviously reduced relative to the hot-mixed asphalt mixture.

The invention discloses a high-shearing and high-bonding coating material and a preparation method thereof. The coating material is prepared from the following components in parts by weight: 0.4-0.6 part of powdery butadiene-acrylonitrile rubber, 0.2-0.3 part of a flame retardant, 0.2-0.3 part of a stabilizer, 3-5 parts of an asphalt modifier, 15-25 parts of asphaltene powder, 25-35 parts of matrix asphalt and 35-55 parts of a solvent. The coating material disclosed by the invention is reasonable in formula and simple in preparation method, has relatively high shearing strength between layer and bonding force, is good in low-temperature flexibility, free of cracks at -25 DEG C, strong in waterproof performance and great in construction temperature range, and the construction season is prolonged, and moreover, the coating material can be smeared, sprayed or sprinkled under a room temperature condition and is wide in application range.

The invention provides a warm-mix high-viscosity modified asphalt, and is prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 0-3 parts of N,N'-ethylenebis(stearamide), 0-2 parts of stearic acid or stearate, 0-1 part of high-molecular wax, 3-8 parts of styrene-butadiene-styrene block copolymer, 0-2 parts of styrene butadiene rubber, 2-5 parts of rubber oil, 0-8 parts of colloidal particles and 0.1-0.3 part of a stabilizer. According to the warm-mix high-viscosity modified asphalt provided by the invention, the production and mixing temperature of the mixture is reduced while the performance index is not influenced; the power viscosity of the warm-mix high-viscosity modified asphalt at 60 DEG C reaches 100000 Pa.s or above; the Brookfield viscosity at135 DEG C is 2000 mPa.s or below; the mixing temperature and the compaction temperature required by the high-viscosity asphalt mixture are reduced; and compared with the mixing temperature of the heat-mix asphalt mixture, the mixing temperature is reduced by about 20-30 DEG C. The fuel consumption can be reduced, the waste gas emission can be reduced, and the operation environment of a constructorcan be improved.

The invention provides an asphalt modifier which consists of a composition I and styrene-butadiene-styrene block copolymer emulsion, wherein the composition I consists of ethylvinylacetate emulsion, styrene-butadiene emulsion, waterborne bisphenol A epoxy resin emulsion and organic silicon modified acrylate emulsion. The invention also provides modified emulsified asphalt and a rapid-curing modified asphalt mixture which comprise the asphalt modifier, and respective preparation methods. The modified asphalt mixture provided by the invention is a brand new rapid-curing high-performance pavement material. The modified asphalt mixture not only has rigidity and intensity of mineral aggregates, but also has flexibility of asphalt and has Marshall stability of over 12KN and a flow value of between 2 to 4mm; and after an asphalt pavement repair layer with a thickness of 1 to 3cm is constructed for about 4 hours, the traffic can be opened.

The invention involves a modified asphalt mixture and preparation method.Modified asphalt mixture contains collective materials, ordinary asphalt, outer doping and mineral powder.Among them, the outer doping contains water, cationic surfactants, stabilizers, and modifiers; first heated water, adds the cationic surfactant to dissolve, and then adds a modified agent and stabilizer.Heat the collection material to 140 ° C-160 ° C, add it to the mixing cylinder, and stir for 30 seconds; add ordinary asphalt and outer doping that have been heated to 120 ° C-140 ° C to the mixing tank, and then stir at stirred40-60 seconds; add the cement or mineral powder to the mixing tank and then stir for 30-60 seconds. The ingredients must be modified asphalt mixture, the material of the dismissal is 100 ℃ -120 ° C, and the actual molding temperature is 90 ° C-110 ° C ° C ° C ° C ° CEssenceThe present invention reduces energy consumption and environmental pollution, improves the performance of asphalt mixture, can adapt to the technical requirements of low temperature construction, and the process is relatively simple.

The invention relates to a graded crushed stone pouring type semi-flexible composite pavement mixture, comprising 100 parts of graded crushed stone in the following mass fractions; 4-6 parts of water; 6-10 parts of grouting material; the grouting material includes cement , water-based acrylic resin, pozzolan material and water, the tank slurry is poured into the graded crushed stone. The semi-flexible composite pavement mixture of the present invention can be constructed at normal temperature, which can effectively solve the problem of asphalt pavement rutting and improve the durability of the pavement; reduce the pollution of the poured semi-flexible pavement hot-mix construction to the environment; improve The construction efficiency of the poured composite pavement reduces the production cost.