86results about How to "Lower the mixing temperature" patented technology

The invention relates to a warm-mixed asphalt mixture and a preparation method thereof. The warm-mixed asphalt mixture is mainly applied to new construction and maintenance of high-grade roads and common roads, and is particularly suitable for cities, parks, tunnels and the like with high environmentally-friendly requirements. The warm-mixed asphalt mixture mainly comprises about 92.4-96.5 percent by weight of mineral, about 3.4-7.5 percent by weight of asphalt cement and 0.05-1.0 percent by weight of chemical modified adhesive cement. The preparation method comprises the following steps of: simultaneously pumping the chemical modified adhesive cement and the hot asphalt cement to the spraying port of a foam generator, fully mixing to generate a foam-containing hot asphalt mixture, spraying the foam-containing hot asphalt mixture into a mixing pan, and further mixing the foam-containing hot asphalt mixture and the hot mineral to form the warm-mixed asphalt mixture. The chemical modified adhesive cement can effectively reduce the mixing, spreading and rolling temperature of the asphalt mixture, and solves the problems of environmental pollution, high energy consumption, asphalt ageing regression and the like. By selecting high-concentration cationic chemical modified latex as a matrix stock of the chemical modified adhesive cement and simultaneously matching a proper proportion of cationic surfactant with lubricating effect and peeling resistance, the influence of the conventional warm-mixed asphalt additive on poor reducing performance and poor adhesive performance of the asphalt cement is solved, and the properties of the warm-mixed asphalt mixture such as water damage resistance, rutting resistance, fatigue resistance, low temperature resistance and the like are improved.

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

The invention discloses a warm-mixing regenerated asphalt which is mixed from asphalt and a composite warm-mixing regenerant, wherein the composite warm-mixing regenerant is a surfactant-oil regenerant composite material. The warm-mixing regenerated asphalt has the advantages of favorable function effect, no pollution and low cost. The composite warm-mixing regenerant organically combines the warm-mixing agent with the regenerant to fully display the overall functions. The invention also discloses a preparation method of the warm-mixing regenerated asphalt, which comprises the following steps: heating the asphalt to mixing temperature; and adding the composite warm-mixing regenerant to the asphalt, and mixing. The preparation method is simple, and is implemented by directly adding the composite warm-mixing regenerant into the asphalt at one time and uniformly mixing; the mixing temperature is obviously lowered, thereby reducing the discharge of the harmful gas and lowering the cost; and the warm-mixing regenerated asphalt has favorable pavement performance.

The invention relates to a preparation method for white carbon black, and concretely relates to a preparation method for high-dispersion deposition white carbon black. A white carbon black suspension, an umbrella-shaped siloxane dispersant and a siloxane coupling agent containing sulfydryls or carbon-carbon double bonds are mixed, the pH value is adjusted to 2-7 after mixing, the mixture is heated to 30-79 DEG C and reacted for 1-6h, and high-dispersion deposition white carbon black is obtained. The umbrella-shaped siloxane dispersant and the white carbon black suspension are mixed at a mass ratio of 1:1-1:20. The siloxane coupling agent and the white carbon black suspension are mixed at a mass ratio of 1:1-1:20. The prepared white carbon black has superstrong hydrophobicity, the processing performance in subsequent preparation of rubber compounds can be raised effectively, dynamic mechanical properties of vulcanized rubber as tyre tread rubber can be improved effectively, the rolling resistance of tread rubber is lowered effectively, and the wear resistant performance of tread rubber is raised.

The invention discloses a high-modulus asphalt mixture additive and a preparation method thereof. The additive comprises, by weight, 100 parts of plastic, 10-20 parts of EVA resin, 15-25 parts of butadiene-styrene rubber and/or derivative thereof, 10-20 parts of ethylene tar and 10-20 parts of composite modifier, wherein the composite modifier is composed of a mesoporous molecular sieve coated with epoxy grafted polyethylene wax. The additive has high compatibility with asphalt and a mixture, so that resistance to low-temperature cracking of a high-modulus asphalt mixture is improved remarkably, the additive has excellent resistance to track and water damage, and the mixture is low in blending temperature and high in construction peaceability.

The invention discloses a composite warm-mixing regenerant. The composite warm-mixing regenerant is a composite material of a surfactant and an oil regenerant, wherein the surfactant is one or more of fatty acid glyceride, fatty acid sorbitan, polysorbate and sucrose ester and the oil regenerant is one or more of extracted oil obtained by refining lubricating oil, lubricating oil, engine oil and heavy oil. The invention also discloses a preparation method of the composite warm-mixing regenerant. The preparation method comprises the following steps of weighing the surfactant and the oil regenerant at a certain ratio, loading the surfactant and the oil regenerant into a mixing device and mixing. According to the composite warm-mixing regenerant disclosed by the invention, by organically combining the surfactant and the oil regenerant, the composite warm-mixing regenerant for an asphalt pavement material is produced, the reduction in the mixing temperature of asphalt and an asphalt mixture and the recycling of an old asphalt mixture can be simultaneously achieved, no pollution is generated in the preparation process and the problems that the environmental pollution, waste of resources and like caused by high mixing temperature of traditional asphalt and the asphalt mixture and low utilization ratio of the old asphalt mixture are solved.

The invention discloses low-smoke asphalt comprising base asphalt, smoke inhibitor SBS and lipophilic type nanometer calcium carbonate, wherein the weight of the smoke inhibitor SBS is 3-4% of that of the base asphalt; and the weight of the lipophilic type nanometer calcium carbonate is 4-5% of that of the base asphalt. The invention also discloses a method for reducing the smoke generated during asphalt concrete road surface construction. The invention can reduce about 28-30% of asphalt smoke under the precondition without reducing the blending temperature and the road surface performance of asphalt mixing materials in the asphalt concrete road surface construction process.

The invention discloses a preparation method of a high-flame-retardant smoke-suppression LVT floor wear-resistant layer. The preparation method comprises the following steps of: (1) taking the following production raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 0-40 parts of a plasticizer, 0-50 parts of a flame retardant, 0-8.0 parts of a smoke suppression agent, 1.0-6.0 parts of a stabilizer and 0.5-3.0 parts of a processing aid; and (2) mixing the production raw materials, performing internal mixing, performing open milling, calendering, cooling, drawing and discharging to obtain the high-flame-retardant smoke-suppression LVT floor wear-resistant layer. According to the LVT floor wear-resistant layer prepared by the method disclosed by the invention, the wear-resistant layer has excellent flame-retardant smoke-suppression performance by reasonably proportioning the components of the plasticizer, the flame retardant and the smoke suppression agent; and by controlling the mixing, internal mixing and other parameters, the light transmittance and flexibility of the wear-resistant layer are greatly improved, the pattern of a color film can be displayed to thegreatest degree when the wear-resistant layer is applied to the LVT floor, the pattern diversity of the LVT floor is reflected, and the wear-resistant layer can be applied to ships, rail transit and other places with relatively strict operating requirements.

The invention discloses a preparation method and a construction method of a warm mix asphalt mixture. The preparation method comprises the following steps: testing all performance indexes of a warm mixing agent and matrix asphalt; adding different addition amounts of the warm mixing agent into the matrix asphalt to prepare warm mix asphalt; commonly testing all performance indexes of the warm mix asphalt by adopting a penetration grading evaluation system and a PG grading evaluation system, and determining the best addition amount of the warm mixing agent; and preparing the warm mix asphalt mixture. The warm mixing agent is a Sasobit warm mixing agent, and the best addition amount of the warm mixing agent is 2.5-3.5% of the mass of the matrix asphalt. The construction method comprises the steps of warm mix asphalt mixture mixing, transportation, spreading and compaction. The preparation method and the construction method of the warm mixing asphalt mixture are simple, the mixing temperature substantially decreases, the discharge of harmful gases is substantially reduced, the cost is reduced, and the road performances of the asphalt and the asphalt mixture are comprehensively improved.

The invention relates to an asphalt mixture additive and a preparation method thereof. The asphalt mixture additive comprises the following components in parts by mass: 10-20 parts of a polymer, 5-10 parts of a cross linker, 10-20 parts of padding, 0.5-2 parts of a smog inhibitor, 1-2 parts of a plasticizer, 0.1-1 part of an antioxidant and 50-70 parts of matrix asphalt, wherein the matrix asphalt is one of Shell 70#, Shell 90#, SK70# or SK90#. Compared with the prior art, the asphalt mixture additive has the advantages that the anti-rutting performance and water damage resistance of an asphalt mixture can be significantly improved, the low-temperature cracking resistance and ageing resistance of asphalt concrete can be effectively improved, and the service life of asphalt roads is prolonged; meanwhile, the asphalt mixture additive can substitute about 15-25% of asphalt raw materials in the asphalt mixture, so that the production temperature is reduced to 140 DEG C, then the smoking phenomenon in the production and spreading processes is effectively reduced, and the asphalt mixture additive is energy-saving and environment-friendly; and the production method is simple, low in cost and suitable for industrialized production.

The invention discloses a waste grease premixed reinforced asphalt mixture and a preparation method thereof. The preparation method comprises the following steps: step 1, adding 1.5 to 2.5 percent o waste grease into matrix asphalt, uniformly stirring, developing, and obtaining waste grease soft asphalt; step 2, premixing aggregates by using the waste grease soft asphalt prepared in step 1, and obtaining a premixed material; step 3, re-mixing the premixed material obtained in step 2 by using rock asphalt powder, and obtaining a remixed material; step 4, adding mineral powder into the remixed material obtained in step 3, and uniformly mixing, thus obtaining the waste grease premixed reinforced asphalt mixture. The waste grease premixed reinforced asphalt mixture can well use the waste grease and can solve the problems in the asphalt mixture pavement laying process such as high energy consumption, emission of a great amount of greenhouse gas and harmful gas and the like.

The invention discloses a bituminous mixture preparation method capable of implementing warm mixing. The bituminous mixture preparation method capable of implementing warm mixing comprises the following steps: stirring coarse aggregates and bitumen under the condition of a first preset temperature; stirring the coarse aggregates and the bitumen into a mixture with a first set viscosity; and keeping adding fine aggregates in the mixture with the first set viscosity and stirring to obtain a target mixture with set strength. According to the bituminous mixture which is prepared by warm mixing, abitumen material replaces materials such as Sasobit, Evotherm in the prior art, meanwhile, the production blending temperature of the mixture can be reduced under the condition that a warm mixing agent is not added, and a warm mixing effect is achieved.

The invention discloses a normal temperature regenerant for an asphalt pavement recycled mixture and relates to the technical field of production of auxiliary materials for processing asphalt. The regenerant is prepared from the following component in percentage by weight: 20 to 70 percent of heavy traffic paving asphalt, 2 to 10 percent of a latex modifier, 2 to 9 percent of a surfactant, 15 to 40 percent of water, 0 to 5 percent of an organic aid and 0 to 3 percent of aromatic oil. The normal temperature regenerant prepared by the invention is used for recycling a pavement recycled mixture;the performance of the obtained recycled mixture meets existing specifications and standards and the standards of national renewable asphalt concrete; the problem that the performance of an existing pavement recycled mixture cannot meet national standard requirements at present is solved.

The invention provides low-hysteresis carbon black and a production method thereof. The low-hysteresis carbon black has the characteristics that the oil absorption value is 131-145 ml/100 g, the compression oil absorption value is 102-114 ml/100 g, the iodine absorption value is 115-131 mg/g, and the nitrogen adsorption specific surface area is 119-130 m < 2 >/g. A tire manufactured using the low-hysteresis carbon black has low rolling resistance and low heat accumulation under use conditions.

The invention provides a composite pavement sealing layer and a preparation method and application thereof and belongs to the technical field of road maintenance. The composite pavement sealing layerprovided by the invention comprises a bottom layer arranged on the surface of a to-be-treated road and a surface layer arranged on the surface of the bottom layer, wherein the bottom layer is formed by a normal temperature modified asphalt mixture which comprises asphalt, an asphalt modifier and aggregate; the surface layer is formed by a sand-containing fog seal layer mixture which comprises a waterborne concentrated cover material, an acrylic resin emulsion, fine sand and water; and the waterborne concentrated cover material comprises asphalt, emulsifier, argil and water. The composite pavement sealing layer provided by the invention has the beneficial effects that the softening point of the asphalt is reduced by utilizing the asphalt modifier, so that the mixing of the normal temperature modified asphalt mixture and the paving of the bottom layer can be realized under normal temperature conditions; and meanwhile, by utilizing the surface layer formed by the sand-containing fog sealing layer mixture, water on the road surface can be effectively prevented from sinking in road and damaging the bottom layer, so that the waterproof performance of the road surface is improved.

The invention discloses a foam warm-mixing SMA-13 asphalt mixture, a preparation method and a performance evaluation method thereof. The preparation method comprises the following steps: performing mechanical foaming processing on the modified asphalt to prepare the foam-modified asphalt; screening an aggregate, taking the required grade of a coarse aggregate and a fine aggregates; mixing the selected aggregates, adding flocculent lignin fibers and the foam-modified asphalt, and uniformly stirring the material to obtain a target product. Middle-high temperature asphalt, gas and water are simultaneously introduced into an asphalt foaming apparatus for rapid vaporization, foam asphalt is generated through rapid expansion, volume of the formed asphalt is temporarily increased, and the viscosity is temporarily minimized, the aggregates can be fully coated under low temperature, workability is increased, mixing temperature of the foam warm-mixing SMA-13 asphalt mixture is reduced from the temperature of 180-185 DEG C to about 160 DEG C, mixing temperature is reduced, and aging degree of the SMA-13 asphalt mixture is reduced, and the generation of the harmful gas is reduced.

The invention discloses a warm mixing type track-resistant compound modification agent and a preparation method thereof and belongs to the technical field of road asphalt. The warm mixing type track-resistant compound modification agent is prepared from a special warm mixing agent, a powdery solid, polyethylene wax, sulfur and hard asphalt according to a formula, wherein the special warm mixing agent is prepared from a fluorocarbon surfactant, alkyl glycoside and carlo amine, the powdery solid is a solid product separated after oily sludge is treated by adopting a sludge thermal-extraction dehydration process. The components in the warm mixing type track-resistant compound modification agent have a synergistic effect, the effect of additive synergism can be played, the mixing and forming temperatures of a warm mixing type asphalt mixed material prepared by applying the warm mixing type track-resistant compound modification agent are lower than 135 DEG C, the warm mixing type track-resistant compound modification agent has the advantages of obviously reducing the mixing and forming temperatures, and the properties of the mixed material are equivalent to the properties of warm mixing asphalt.