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Asphalt mixture anti-rutting additive agent, preparation method and use method thereof

An anti-rutting additive and asphalt mixture technology, applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of uneven mixing and dispersing, difficult mixing, affecting asphalt compatibility, etc., to improve performance and protect the environment. , the effect of reducing temperature sensitivity

Active Publication Date: 2009-06-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because polypropylene resin itself is difficult to stir, and its dosage is 2-3 times that of polyethylene resin, there is a serious problem of uneven dispersion when mixing and stirring, which directly affects the compatibility with asphalt in application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The melting point of the polyethylene resin used is between 120-130°C, the melting point of the polypropylene resin is between 160-170°C, the mass ratio between the polyethylene resin and the polypropylene resin is 95:5, first stir evenly , put it into TE-50 twin-screw extruder, melt and shear and mix at 180-200°C to make a homogeneous substance, and then extrude through a nozzle to make an extrudate. After cooling and shaping, the extruded product is pelletized on a granulator and then air-dried. The properties of the prepared additive sample are as follows: elastic modulus 103.8MPa, tensile strength 14.67MPa, elongation at break 433.3%, impact strength 51.97×10 3 J.m. -2 , Melt index 1.6513g / 10min. After the additive was mixed with the asphalt concrete aggregate at 180°C at a mass ratio of 6‰, the rutting resistance test was 63,000 times / mm.

Embodiment 2

[0021] Example 2: The melting point of the polyethylene resin used is between 120-130°C, the melting point of the polypropylene resin is between 160-170°C, the mass ratio between the polyethylene resin and the polypropylene resin is 90:10, first stir evenly , put the above composition into a TE-50 twin-screw extruder, melt and shear and mix it at 180-200°C to make a homogeneous substance, and then extrude it through a nozzle to make an extrudate. After cooling and shaping, the extruded product is pelletized on a granulator and then air-dried. The properties of the prepared additive sample are as follows: elastic modulus 154.7MPa, tensile strength 15.46MPa, elongation at break 383.4%, impact strength 52.87×10 3 J.m. -2 , Melt index 1.5876g / 10min. After the additive was mixed with the asphalt concrete aggregate at a mass ratio of 6‰ at 180°C, the anti-rutting test did not produce obvious deformation within 60 minutes.

Embodiment 3

[0022] Example 3: The melting point of the polyethylene resin used is between 120-130°C, the melting point of the polypropylene resin is between 160-170°C, the mass ratio between the polyethylene resin and the polypropylene resin is 80:20, first stir evenly , put the above composition into a TE-50 twin-screw extruder, melt and shear and mix it at 180-200°C to make a homogeneous substance, and then extrude it through a nozzle to make an extrudate. After cooling and shaping, the extruded product is pelletized on a granulator and then air-dried. The properties of the prepared additive sample are as follows: elastic modulus 215.7MPa, tensile strength 18.36MPa, elongation at break 434.4%, impact strength 53.67×10 3 J.m. -2 , Melt index 1.6465g / 10min. After the additive was mixed with the asphalt concrete aggregate at 180°C at a mass ratio of 6‰, the rutting resistance test was 3706 times / mm.

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Abstract

The invention relates to an anti-rut asphalt additive, a method for preparing the same and a method for using the same. Polyethylene resin and polypropylene resin are adopted for using simultaneously; and through the use of liquation, cutting, mixing and extrusion pelletization technology at high temperature, compatibility between the materials is improved so as to further improve high-temperature stability of an asphalt surface layer. In order to reduce material cost, waste polyethylene resin and waste polypropylene resin can also be used so as to achieve the aims of reducing cost, realizing recycling of waste and reducing environmental pollution simultaneously.

Description

Technical field: [0001] The invention relates to an anti-rutting asphalt additive, a preparation method and a use method thereof. Background technique: [0002] In most parts of our country, the highest temperature in summer can reach 35-40°C, and the highest temperature on the road surface can reach 60-65°C. In addition, the high temperature lasts for a long time. Under the action, asphalt, as a viscoelastic material, will transform from elastic body to plastic body, and the stiffness modulus will be greatly reduced. Due to the insufficient shear strength of asphalt, compaction wear and flow instability will cause lateral deformation. The place where it passes is easy to produce downward depressions, while the sides of the wheel are easy to bulge upwards, and then produce band-shaped parallel grooves, which is what people usually call ruts. The appearance of ruts not only affects the driving comfort, but also greatly reduces the service life and service quality of the road...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L23/06C08L23/12
Inventor 张立群刘玲黄小溪李晓林曹贵昌
Owner BEIJING UNIV OF CHEM TECH
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