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CN-122011748-A - Composite amine anti-stripping agent and preparation method and application thereof

CN122011748ACN 122011748 ACN122011748 ACN 122011748ACN-122011748-A

Abstract

The invention belongs to the technical field of road construction materials, and relates to a compound amine anti-stripping agent, a preparation method and application thereof. The composite amine anti-stripping agent comprises 70-85% of polyamide resin and 15-30% of sodium dodecyl benzene sulfonate. The composite amine anti-stripping agent provided by the invention has the advantages that the high-low temperature stability and the fatigue resistance of the asphalt mixture are enhanced through the double synergy of the chemical bond action and the adsorption action, and the anti-stripping agent has remarkable anti-stripping performance.

Inventors

  • WEN YONG
  • ZHENG FUSEN
  • SHI RUYI
  • Zhao Caizheng
  • KANG HAOYI
  • PEI JIANZHONG

Assignees

  • 长安大学

Dates

Publication Date
20260512
Application Date
20260116

Claims (9)

  1. 1. The composite amine anti-stripping agent is characterized by comprising 70-85% of polyamide resin and 15-30% of sodium dodecyl benzene sulfonate.
  2. 2. The composite amine anti-stripping agent according to claim 1, wherein the mass fraction of the polyamide resin is 80% -85%, and the mass fraction of the sodium dodecyl benzene sulfonate is 15% -20%.
  3. 3. A method for preparing the composite amine anti-stripping agent, which is used for preparing the composite amine anti-stripping agent as claimed in claim 2, and is characterized by comprising the following steps: S1, respectively weighing polyamide resin and sodium dodecyl benzene sulfonate according to mass fraction; S2, heating the polyamide resin to a flowing state, then adding sodium dodecyl benzene sulfonate, fully shearing, stirring until the mixture is uniformly dispersed, and finally cooling to obtain the polyamide resin.
  4. 4. The method for preparing the composite amine anti-stripping agent according to claim 3, wherein in the step S2, the heating temperature is 150+/-5 ℃, the shearing speed is 1000r/min-1200r/min, and the stirring time is 10min-15min.
  5. 5. Use of the composite amine-based anti-spalling agent of claim 1 to improve adhesion between asphalt-aggregate.
  6. 6. The use of the complex amine anti-spalling agent of claim 1 to improve the high temperature stability of asphalt.
  7. 7. The use of the complex amine anti-spalling agent of claim 1 to improve the low temperature stability of asphalt.
  8. 8. The use according to claim 5, 6 or 7, wherein the amount of the compound amine anti-spalling agent added is 0.3-0.5% of the asphalt mass.
  9. 9. The method according to claim 8, wherein the modified asphalt is obtained by adding the compound amine anti-stripping agent into asphalt, shearing and stirring, the modifying temperature is 175+/-5 ℃, the shearing speed is 3000r/min-3200r/min, and the stirring time is 50min-55min.

Description

Composite amine anti-stripping agent and preparation method and application thereof Technical Field The invention belongs to the technical field of road construction materials, and relates to a compound amine anti-stripping agent, a preparation method and application thereof. Background Asphalt pavement is widely applied to high-grade highways due to the advantages of good flatness, comfortable driving, excellent construction workability, easy repair and the like. However, as the traffic volume is increased increasingly, the overload overspeed phenomenon is serious, and the temperature sensitivity of the asphalt pavement is higher, many asphalt pavements are subjected to water damage such as spalling, pit and the like under high humidity and rain wash, so that the service life of the pavement is shortened, the maintenance period is advanced, and the maintenance cost of the pavement is increased. Therefore, it is important to improve the water stability of asphalt mixtures. Aiming at the problem of asphalt pavement water damage, adding an anti-stripping agent into an asphalt mixture is an effective means for improving asphalt bonding performance, and is widely applied to practical engineering. The addition of the anti-stripping agent enables physical adsorption or chemical connection to be formed between asphalt and aggregate, reduces interfacial tension of asphalt-aggregate, further improves adhesiveness of asphalt-aggregate, and improves water damage resistance of asphalt pavement. The anti-stripping agents commonly used in the present building construction are as follows: The first is an inorganic anti-stripping agent, see for example CN106186778B for an anti-stripping agent for road petroleum asphalt and a preparation method thereof, lime is adopted as the anti-stripping agent, the content of alkaline components on the surface of aggregate can be enhanced, and the anti-stripping capability is improved by acid-base chemical action. The anti-stripping agent has the characteristics of low cost and excellent performance, but has complex use process, is not easy to mix uniformly, influences the durability of the mixture and leads to poor high-low temperature stability. The second is a metal saponified material, see CN104479373A, an anti-stripping highway asphalt and a preparation method thereof, and soapstock iron is used as an anti-stripping agent to modify the asphalt, so that the asphalt performance is improved, and the anti-stripping capability is further improved. The asphalt is convenient to use and low in cost, but is easy to separate due to the large density difference between the asphalt and the asphalt, so that the stripping resistance is reduced. The third is surfactant, such as quaternary ammonium salt, which can modify asphalt, and has convenient use, but has higher cost and poorer thermal stability of the modified asphalt mixture. In summary, the problems of poor anti-stripping property and poor high-low temperature stability in asphalt modification based on the existing anti-stripping agent are solved, so that the development of a novel anti-stripping agent is urgent. Disclosure of Invention Aiming at the problems of poor stripping resistance and poor high-low temperature stability of the existing stripping-resistant agent in asphalt mixture modification, the invention provides a compound amine stripping-resistant agent, and a preparation method and application thereof. According to the invention, the polyamide resin and the sodium dodecyl benzene sulfonate are mixed according to a specific proportion to form the compound amine anti-stripping agent, and the high-low temperature stability and the fatigue resistance of the asphalt mixture are enhanced through the double synergy of chemical bond action and adsorption action, so that the compound amine anti-stripping agent has remarkable anti-stripping performance. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The composite amine anti-stripping agent comprises 70-85% of polyamide resin and 15-30% of sodium dodecyl benzene sulfonate. Further defined, the polyamide resin has a mass fraction of 80% -85% and sodium dodecyl benzene sulfonate has a mass fraction of 15% -20%. A preparation method of a composite amine anti-stripping agent comprises the following steps: S1, respectively weighing polyamide resin and sodium dodecyl benzene sulfonate according to mass fraction; S2, heating the polyamide resin to a flowing state, then adding sodium dodecyl benzene sulfonate, fully shearing, stirring until the mixture is uniformly dispersed, and finally cooling to obtain the polyamide resin. Further defined, in the step S2, the heating temperature is 150+/-5 ℃, the shearing speed is 1000r/min-1200r/min, and the stirring time is 10min-15min. The application of the compound amine anti-stripping agent in improving the adhesion performance between asphalt and aggregate. The application of the compound amine anti-