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CN-121975341-A - Warm mix asphalt and preparation method thereof

CN121975341ACN 121975341 ACN121975341 ACN 121975341ACN-121975341-A

Abstract

The application provides warm mix asphalt and a preparation method thereof, and belongs to the technical field of road engineering materials. The raw materials of the warm mix asphalt comprise matrix asphalt, epoxidized soybean oil and phosphogypsum. According to the application, the epoxy soybean oil and phosphogypsum are mixed into the matrix asphalt to carry out composite modification on the matrix asphalt, and the synergistic effect of the epoxy soybean oil and the phosphogypsum is utilized, so that the low-temperature ductility of the asphalt is synchronously improved while the construction viscosity of the asphalt is obviously reduced, the softening point is ensured to be excessively reduced, the negative influence of the traditional warm-mix agent on the asphalt performance is effectively overcome, the low-temperature cracking resistance of an asphalt pavement is enhanced, the service life of the pavement is prolonged, the safety and the comfort of road traffic are improved, and in addition, the epoxy soybean oil and the phosphogypsum are used as additives to open up a new way for recycling, so that the environment-friendly road engineering development requirement is met.

Inventors

  • ZHANG ZEYU
  • JI YIBO
  • LUO RONG
  • ZHANG ZHENG

Assignees

  • 武汉理工大学

Dates

Publication Date
20260505
Application Date
20260319

Claims (10)

  1. 1. The warm mix asphalt is characterized by comprising the raw materials of matrix asphalt, epoxidized soybean oil and phosphogypsum.
  2. 2. The warm mix asphalt according to claim 1, wherein the mass ratio of the matrix asphalt, the epoxidized soybean oil and the phosphogypsum is 100 (5-8): 9-11.
  3. 3. The warm mix asphalt according to claim 2, wherein the mass ratio of the matrix asphalt, the epoxidized soybean oil and the phosphogypsum is 100 (6-8): 9-11.
  4. 4. The preparation method of the warm mix asphalt is characterized by comprising the following steps: heating matrix asphalt to a molten state to obtain a melt; Adding epoxidized soybean oil into the melt, and uniformly stirring to obtain a mixture; And adding phosphogypsum into the mixture, and uniformly stirring to obtain the warm mix asphalt.
  5. 5. The method according to claim 4, wherein the epoxidized soybean oil is added to the melt at 155 to 165 ℃ and stirred for 10 to 20 minutes.
  6. 6. The method according to claim 4, wherein phosphogypsum is added to the mixture at 155-165 ℃ and stirred for 10-20 min.
  7. 7. The method according to claim 4, wherein the step of adding epoxidized soybean oil to the melt and stirring uniformly to obtain a mixture is performed at a stirring speed of 300 to 500r/min.
  8. 8. The method according to claim 4, wherein phosphogypsum is added into the mixture and stirred uniformly to obtain warm mix asphalt, and the stirring speed is 100-200 r/min.
  9. 9. The method of claim 4, wherein the phosphogypsum has a particle size of less than or equal to 0.075mm.
  10. 10. The preparation method of the phosphogypsum, according to claim 4, is characterized in that the mass ratio of the matrix asphalt to the epoxidized soybean oil to the phosphogypsum is 100:5-8:9-11.

Description

Warm mix asphalt and preparation method thereof Technical Field The invention relates to the technical field of road engineering materials, in particular to warm mix asphalt and a preparation method thereof. Background The traditional hot mix asphalt (Hot Mixing Asphalt, HMA) technology is the most widely used asphalt production technology with good road performance, and makes a great contribution to the development of modern highway traffic. The construction temperature of the technology is high (the heating temperature is about 160-180 ℃ in general), a large amount of energy is consumed, and asphalt can generate a lot of smoke dust and pungent smell under the high-temperature condition, so that the environment is seriously polluted, and the life and property safety of people is endangered. In recent years, with the gradual decline of carbon emission in other industries, environmental protection problems caused by the HMA technology are increasingly prominent. In this regard, warm mix asphalt (Warm Mixing Asphalt, WMA) technology having excellent energy saving effect and workability is receiving attention. The technology can reduce the construction temperature of asphalt to a certain extent by adding the warm mixing agent in the asphalt heating and mixing process, not only saves energy consumption, but also is beneficial to reducing smoke emission, is more beneficial to environmental protection, and can be applied to asphalt pavement maintenance and plateau cold areas. However, the conventional warm mix asphalt is difficult to consider the low temperature performance of the asphalt while reducing the viscosity, and the addition of the warm mix agent has great sacrifice on the high temperature performance of the asphalt, so that the comprehensive performance of the warm mix asphalt is difficult to ensure, and the application of the warm mix asphalt is limited. Disclosure of Invention In view of the technical problems in the background art, the application provides warm mix asphalt and a preparation method thereof, and aims to provide warm mix asphalt with low viscosity, better low-temperature performance and high-temperature performance. In a first aspect, an embodiment of the present application provides a warm mix asphalt, wherein raw materials of the warm mix asphalt include a matrix asphalt, epoxidized soybean oil and phosphogypsum. Optionally, in some embodiments, the mass ratio of the matrix asphalt, the epoxidized soybean oil and the phosphogypsum is 100 (5-8): 9-11. Optionally, in some embodiments, the mass ratio of the matrix asphalt, the epoxidized soybean oil and the phosphogypsum is 100 (6-8): 9-11. In a second aspect, an embodiment of the present application provides a method for preparing warm mix asphalt, including the steps of: heating matrix asphalt to a molten state to obtain a melt; Adding epoxidized soybean oil into the melt, and uniformly stirring to obtain a mixture; And adding phosphogypsum into the mixture, and uniformly stirring to obtain the warm mix asphalt. Optionally, in some embodiments, the epoxidized soybean oil is added to the melt at 155-165 ℃ and stirred for 10-20 minutes. Optionally, in some embodiments, the phosphogypsum is added to the mixture at 155-165 ℃ and stirred for 10-20 min. Optionally, in some embodiments, the epoxidized soybean oil is added to the melt and stirred uniformly to obtain the mixture, and the stirring speed is 300-500 r/min. Optionally, in some embodiments, phosphogypsum is added into the mixture, and the stirring is uniform, so that the stirring speed is 100-200 r/min in the step of obtaining the warm mix asphalt. Optionally, in some embodiments, the phosphogypsum has a particle size less than or equal to 0.075mm. Optionally, in some embodiments, the mass ratio of the matrix asphalt, the epoxidized soybean oil and the phosphogypsum is 100 (5-8): 9-11. The technical scheme provided by the application has the following beneficial effects: According to the technical scheme, the Epoxy Soybean Oil (ESO) and the Phosphogypsum (PG) are doped into the matrix asphalt to carry out composite modification on the matrix asphalt, and the synergistic effect of the Epoxy Soybean Oil (ESO) and the Phosphogypsum (PG) is utilized, so that the low-temperature ductility of the asphalt is synchronously improved and the softening point is ensured to be excessively reduced while the construction viscosity of the asphalt is obviously reduced, the negative influence of the traditional warm-mix agent on the asphalt performance is effectively overcome, the low-temperature cracking resistance of an asphalt pavement is enhanced, the service life of the pavement is prolonged, and the safety and the comfort of road traffic are improved. In addition, the epoxidized soybean oil is a biological-based environment-friendly material, the phosphogypsum is industrial solid waste, the method has the characteristics of wide sources and low cost, and the epoxidized soybean oil and the phos