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Polyethylene/rubber powder blend modified asphalt and preparation method thereof

A technology of blending modification and rubber powder, which is applied to building components, building insulation materials, construction, etc. It can solve the problems not involved in improving the storage stability of modified asphalt, and achieve short production process, reasonable price and high production efficiency Effect

Inactive Publication Date: 2014-04-09
中华人民共和国泰州出入境检验检疫局
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented processing technology is simple and can improve the softening point and elastic recovery of modified asphalt to a certain extent, but it does not involve improving the storage stability of modified asphalt

Method used

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  • Polyethylene/rubber powder blend modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 98g of low-density polyethylene, 98g of 40 mesh rubber powder, and 4g of crosslinking agent in the experiment, mix them evenly, and melt and extrude them at 170°C to 180°C in a twin-screw extruder to obtain polyethylene / rubber powder blend;

[0036] (2) The experiment weighed 1000g of heavy-duty No. 90 asphalt and 100g of the polyethylene / rubber powder blend prepared in step (1), heated the base asphalt to 180°C, and added the polyethylene / rubber powder blend to the base asphalt After mixing evenly in medium, use a high-speed shearing machine to shear and disperse for 30 minutes to obtain polyethylene / rubber powder blended modified asphalt.

Embodiment 2

[0038] (1) In the experiment, 80g of linear low density polyethylene, 117g of 60 mesh rubber powder, and 3g of crosslinking agent were weighed, mixed evenly, and melted and extruded in a twin-screw extruder at 170°C to 180°C to obtain polyethylene / rubber powder blend;

[0039] (2) The experiment weighed 1000g of heavy-duty No. 90 asphalt and 60g of the polyethylene / rubber powder blend prepared in step (1), heated the base asphalt to 180°C, and added the polyethylene / rubber powder blend to the base asphalt After mixing evenly in medium, use a high-speed shearing machine to shear and disperse for 50 minutes to obtain polyethylene / rubber powder blended modified asphalt.

Embodiment 3

[0041] (1) Weigh 90g of low-density polyethylene, 107g of 80-mesh rubber powder, and 3g of cross-linking agent in the experiment, and mix them evenly, and melt and extrude them in a twin-screw extruder at 170°C to 180°C to obtain polyethylene / rubber powder blend;

[0042] (2) The experiment weighed 1000g of heavy-duty No. 90 asphalt and 130g of the polyethylene / rubber powder blend prepared in step (1), heated the base asphalt to 180°C, and added the polyethylene / rubber powder blend to the base asphalt After mixing evenly in medium, use a high-speed shearing machine to shear and disperse for 50 minutes to obtain polyethylene / rubber powder blended modified asphalt.

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Abstract

The invention provides a polyethylene / rubber powder blend modified asphalt which is composed of a matrix asphalt and a polyethylene / rubber powder blended substance, wherein the polyethylene / rubber powder blended substance is composed of the following components in percentage by weight: 40-52% of polyethylene, 45-59% of rubber powder and 1-3% of crosslinking agent; and the weight ratio of the polyethylene / rubber powder blended substance to the matrix asphalt is (5-15):100. According to the polyethylene / rubber powder blend modified asphalt, the softening point is enhanced, the penetration degree is lowered, and the anti-rut property of the asphalt mixture is enhanced; the ductility is enhanced, and the low temperature ductility is improved; the aging resistance is improved; and the storage stability of the modified asphalt is enhanced, and the storage and transportation properties of the modified asphalt are improved. The polyethylene / rubber powder blend modified asphalt provides flexibility, fatigue resistance and cracking resistance for the asphalt pavement, thereby prolonging the service life of the pavement.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a polyethylene / rubber powder blended modified asphalt and a preparation method thereof. Background technique [0002] As the binder of asphalt pavement, asphalt needs to have high softening point and high ductility. Petroleum asphalt has high temperature sensitivity, and it is easy to soften and flow at high temperature, resulting in rutting on the asphalt pavement, and it is easy to become brittle at low temperature, resulting in asphalt pavement of cracking. Polyethylene can significantly increase the softening point of asphalt, making it difficult for asphalt to soften and flow at high temperatures, but polyethylene does not significantly improve the low-temperature performance of asphalt, and the storage stability of polyethylene-modified asphalt is poor. Rubber powder modified asphalt can significantly improve the viscosity and low-temperature ductility of asphalt, making...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L23/06C08L23/08C08L21/00C08K5/14C08K3/06
Inventor 才洪美单衡明金长泰汪凤祖
Owner 中华人民共和国泰州出入境检验检疫局
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