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

The invention discloses novel high viscosity asphalt and a preparation method thereof. The novel high viscosity asphalt comprises the following raw materials in parts by weight: 100 parts of base asphalt with high asphaltene content, 0.1-1.2 part of polyphosphoric acid, 2-12 parts of a ductility improver mother liquid, 1-8 parts of a dispersant, and 0.2-0.5 part of a coupling agent. The preparation method comprises the following steps: adding the polyphosphoric acid in the molten base asphalt to perform a chemical modification reaction, then adding the ductility improver mother liquid, continuing to react, and finally adding the dispersant and the coupling agent to continue to react for a period of time to prepare high viscosity asphalt, wherein the whole process is performed under a highs-speed stirring condition. The high viscosity asphalt is high in 60-degree dynamic viscosity, high in softening point, high in low-temperature ductility, stable to store, and good in adhesion to aggregates, has excellent high temperature stability, excellent low temperature anti-cracking performance, excellent anti-fatigue performance and excellent water resistance, is especially suitable for high-temperature humid areas, areas with relatively high diurnal temperature difference, and paving of heavy-duty roads and drainable pavements, effectively prevents common pavement damages such as pavement rutting, pavement upheaval, pavement fatigue cracking, pavement cold cracking and water encroachment on pavements, and prolongs the service life of the pavement.

The invention discloses an asphalt mixture for a heavy traffic road. The asphalt mixture is prepared from the following raw materials in parts by weight: 50-100 parts of asphalt, 200-350 parts of mineral powder, 50-100 parts of aggregate, 5-10 parts of inorganic fiber, 10-20 parts of ultrahigh molecular weight polyethylene, 20-40 parts of rubber powder and 10-20 parts of kieselguhr. The asphalt mixture disclosed by the invention has high stability and obviously low needle penetration and is a harder asphalt mixture while the dynamic viscosity is lower than that of common asphalt. Therefore, the asphalt mixture disclosed by the invention has better constructability and higher viscosity and toughness and shows stronger mechanical strength; and moreover, the asphalt mixture has good elastic recovery property and shows perfect high-temperature stability.

The invention provides a method for simulating anti-rutting performance of asphalt pavement considering load and high temperature gap, using finite element software, comprising the following steps: selecting pavement structure and materials; establishing a rutting prediction model; selecting material parameters and a mechanical constitutive model Obtain meteorological data and daily traffic distribution; simplify the load action mode; determine the load action time and gap time; determine the gap during high temperature periods; simulate the temperature field; predict road rutting; The invention takes into account the characteristics of asphalt pavement self-recovering part of the deformation in the gap between loads and high-temperature periods, so that the rutting simulation is closer to the real situation, and solves the problem of large errors in the simulation results of the existing method; at the same time, it can judge the specific pavement structure Excellent anti-rutting performance, that is, to select a pavement structure with better anti-rutting performance through virtual tests, without the need to build test roads for comparative experiments, which saves a lot of cost.

The invention discloses a method for emulsifying SBS high-viscosity modified asphalt; the preparation process is suitable for industrial production, and has high viscosity under the premise of simple process, and the SBS high-viscosity modified emulsification obtained in the invention Asphalt is suitable for ultra-thin asphalt wear layer on high-grade roads and special adhesive layer for new roads. It has the characteristics of easy construction, high softening point, good adhesion, easy storage, and the prepared asphalt wear layer has strong anti-loosening ability.

The invention discloses a half-flexible pavement material for rapid traffic opening and a method of the half-flexible pavement material for paving a pavement. The half-flexible pavement material comprises a porous mixed material and a cement-based grouting material filled into pores of the porous mixed material, wherein the porosity of the porous mixed material is 16-23%; the porous mixed material consists of the following components in percentage by mass: 3.5-7% of aqueous epoxy resin, 0.5-2.5% of flexible latex, 87-92% of aggregate and 3.5-5% of mineral powder; the cement-based grouting material consists of the following components in percentage by mass: 35-50% of rapidly hardened sulfate aluminum cement, 25-45% of grinded slag powder, 0.15-0.35% of a water reducing agent, 1-2.5% of a shrinkage reducing agent and 18-25% of water. By adopting the half-flexible pavement material for rapid traffic opening, normal temperature construction can be achieved in the whole process, only 2-4 hours are taken when the aqueous epoxy resin porous mixed material is mixed until the traffic of a half-flexible pavement is opened, and the half-flexible pavement material is excellent in track resistance, relatively long in service life, low in repairing expense, very wide in application prospect and high in use value.

The invention provides a method for rut maintaining and paving of a municipal road. The method comprises the following steps: (1) milling an asphalt surface layer; (2) spreading a modified emulsified asphalt bonding layer; (3) paving an emulsified asphalt cold-recycling mixture lower surface layer; (4) paving a high-elasticity rubber asphalt stress absorption layer; and (5) paving a cement-asphalt pouring type composite pavement surface layer. The combined paving layer obtained through the method has an excellent anti-rutting property and can sufficiently utilize a milled waste asphalt mixture; the integral structure has the characteristics of high rutting resistance, skid resistance, abrasion resistance, long life and low carbon.

The invention relates to a reinforcing material used for pavement bases and a preparation method thereof. The corresponding mixture of the reinforcing material includes 3.5-4.5 parts by mass of low-grade asphalt, 1.0-2.0 parts by mass of cement, and 95.0-98.0 parts by mass of ore material, 1.0-3.0 parts of quality mineral powder; among them: the penetration of low-grade asphalt is 20-60mm, the softening point is 49-100°C, the dynamic viscosity at 60°C is 200-400pas, and the ductility at 15°C is 100-200cm. There are corresponding requirements for grading, and there are relevant requirements for the dynamic stability, residual stability, and freeze-thaw splitting strength ratio of the reinforcing material specimen; the preparation method has specific heating and heat preservation requirements for the component materials and intermediate materials. temperature setting. Therefore, through the setting of material-related performance indicators, combined with the synthetic gradation of mineral materials and the control of temperature during the preparation process, the reinforcing material not only has good anti-rutting performance, but also has a relatively low price. At the same time, through relevant performance tests on the test pieces, it is ensured that the products meet the performance requirements of the design.

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 an epoxy asphalt mixture of a steel bridge as well as a preparation method and a use method thereof. The mixture comprises a component A, a component B and aggregates, wherein the mass ratio of the component A to the component B is (1 to 3.65) to (1 to 8.6); the component A is epoxy resin; the component B is prepared from the following raw materials in parts by mass: 60-100 parts of asphalt, 2-12 parts of high-molecular polymer, 1-7 parts of maleic anhydride, 4-16 parts of monohydric alcohol or polyhydric alcohol, 4-9 parts of oleic acid, 0.15-1 part of an initiator, 30-56 parts of aliphatic dibasic acid, dimeric acid or trimeric acid, 25-55 parts of a curing agent, 5-20 parts of fillers and 0.15-0.85 part of a curing accelerator; the aggregates are prepared from the following raw materials in parts by mass: 100-220 parts of general aggregates and 600-650 parts of light aggregates. The mixture has the advantages of mechanical properties such as high-temperature rutting resistance, low-temperature brittle rupture resistance, rainwater damage resistance, tensile strength, break elongation rate and the like, and is friendly to the construction environment, high in construction applicability, simple in production and construction process, low in production cost, quick in traffic opening and suitable for paving of large-span steel bridge surface, construction of urban trunk roads and the like.

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 provides a cold-mix epoxy asphalt repair material and a preparation method thereof. A cold-mix type epoxy asphalt repair material includes part A and part B; in parts by weight, the part A includes the following components: 100 parts of asphalt; 5 parts to 50 parts of asphalt thinner; 10 parts to 50 parts epoxy asphalt compatibilizer; 5 to 50 parts of epoxy resin curing agent; in parts by weight, the B part includes the following components: 40 to 100 parts of epoxy resin; 5 to 50 parts of Epoxy diluent; the weight ratio of part A to part B is (0.5-5):1. The cold-mix epoxy asphalt repair material provided by the invention has better construction fluidity at room temperature, and is easier to penetrate into cracks on the road surface for repair; and it can be stirred and used at normal temperature without heating and heat preservation for transportation.

The invention provides a cold mixing epoxy asphalt material and a preparation method. The cold mixing 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 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, the asphalt diluent and the epoxy diluent provide better construction fluidity to the epoxy asphalt material 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.