Modified asphalt material for airport pavement, preparation method and applications thereof

A technology of modified asphalt and asphalt mixture, which is applied to building insulation materials, building components, buildings, etc., to improve low temperature performance and fatigue resistance, reduce permanent deformation, and solve wheel rutting and early disease problems

Active Publication Date: 2016-12-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The asphalt modifier of the invention significantly improves the high-temperature performance and rutting resistance of asphalt mixture, and improves the performance of water damage resistance and low-temperature cr

Method used

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  • Modified asphalt material for airport pavement, preparation method and applications thereof
  • Modified asphalt material for airport pavement, preparation method and applications thereof
  • Modified asphalt material for airport pavement, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The modified asphalt material in this example is prepared by adding high modulus agent and anti-rutting agent to SBS modified asphalt. Shell SBS modified asphalt is used, the base asphalt grade is PG 64-22, and the content of SBS relative to base asphalt is 3 %, the high modulus agent adopts high-density polyethylene, and the anti-rutting agent adopts polypropylene, rubber powder and SBS thermoplastic elastomer mixture.

[0039]The preparation method is as follows: heat SBS modified asphalt to 180°C, stir with a shearing machine at a rate of 8000 rpm for 40 minutes at a constant temperature; keep the temperature at 180°C, slowly add anti-rutting agent and high modulus agent in batches, and use a shearing machine to Stir at a rate of 20,000rpm for 40 minutes to disperse evenly; at a constant temperature of 140°C, shear and develop at a rate of 8,000rpm for 40 minutes to obtain the modified asphalt material.

Embodiment 2

[0041] This example is roughly the same as Example 1, using Shell SBS modified asphalt, the base asphalt grade is No. 70 asphalt, and the anti-rutting agent is a mixture of high-density polyethylene, rubber powder and thermoplastic elastomer SBS. Heat the asphalt to 185°C, stir with a shearer at a rate of 12,000rpm for 60min at a constant temperature; keep the temperature at 185°C, slowly add anti-rutting agent and high modulus agent in batches, stir with a shearer at a rate of 30,000rpm for 60min, and disperse Uniform; at a constant temperature of 160°C, and then sheared at a rate of 10,000rpm for 60min, the modified asphalt material is obtained.

Embodiment 3

[0043] This example is roughly the same as Example 1, using SK SBS modified asphalt, the grade of base asphalt is PG 64-16, the high modulus agent is polypropylene, and the anti-rutting agent is polyethylene, rubber powder and thermoplastic elastomer SIS mixture. The preparation method is as follows: heat SBS modified asphalt to 182°C, stir with a shearing machine at a rate of 10,000 rpm for 50 minutes at a constant temperature; keep the temperature at 182°C, slowly add anti-rutting agent and high modulus agent in batches, and use a shearing machine Stir at a rate of 25,000 rpm for 50 minutes to disperse evenly; at a constant temperature of 150°C, shear and develop at a rate of 9,000 rpm for 50 minutes to obtain the modified asphalt material.

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PUM

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Abstract

The invention relates to a modified asphalt material for airport pavement, a preparation method and applications thereof. The modified asphalt material comprises the following components in parts by weight: 100 parts of SBS modified asphalt, 7 to 12 parts of high modulus agent, and 3 to 5 parts of anti-rut agent. The modified asphalt material is prepared by the following steps: (1) heating SBS modified asphalt to a temperature of 180 to 185 DEG C, and stirring the SBS modified asphalt for 40 to 60 minutes under a rotation speed of 8000 to 12000 rpm by a shearing machine at a constant temperature; (2) maintaining a temperature of 180 to 185 DEG C, slowly adding an anti-rut agent and a high modulus agent in batches, and stirring for 40 to 60 minutes by the shearing machine under a rotation speed of 20000 to 30000 rpm to evenly disperse the anti-rut agent and high modulus agent; (3) at a constant temperature of 140 to 160 DEG C, shearing and developing the asphalt for 40 to 60 minutes under a rotation speed of 8000 to 10000 rpm to obtain the modified asphalt material. Compared with the prior art, the obtained asphalt can meet the requirements on low temperature performance and anti-fatigue performance, the high temperature performance and water damage resistant performance of asphalt are improved, the permanent deformation amount of asphalt pavement is reduced, and the problems of ruts and early stage damages on airport pavement are effectively solved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a modified asphalt material used for airport pavement, its preparation method and application. Background technique [0002] Airport pavement is one of the most important infrastructures of an airport, providing a place for aircraft to take off, land and roll, pre-flight preparation and post-flight maintenance. As the asphalt concrete pavement has the advantages of being smooth and skid-resistant, comfortable and stable driving, high degree of mechanized construction, and non-stop construction, etc., it has become the main pavement type for new construction and reconstruction of airport pavements at home and abroad. Compared with expressway pavement, airport pavement has greater traffic load level and tire ground pressure, which will produce stress and strain much greater than that of highway, and has greater requirements on the overall performance of pavement. [0003] During ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L23/06C08L23/12C08L21/00C08L23/08C04B26/26
CPCC04B26/26C04B2111/0075C08L95/00C08L2201/08C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L53/02C08L23/06C08L23/12C08L21/00C08L23/0853C04B14/28C04B18/141C04B14/04C04B14/36C04B14/14C04B16/0683
Inventor 凌建明袁捷肖飞鹏侯向导王嘉宇李泽州
Owner TONGJI UNIV
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