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Method for preparing asphalt concrete anti-rutting agent for road by in-situ graft modification

A technology of road asphalt and anti-rutting agent, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of high price and limited output of anti-rutting agent, improve anti-rutting performance, reduce production cost, and simplify the preparation process Effect

Active Publication Date: 2011-11-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the prices of these anti-rutting agents are relatively expensive, and the output is limited, which cannot meet the growing domestic demand.

Method used

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  • Method for preparing asphalt concrete anti-rutting agent for road by in-situ graft modification
  • Method for preparing asphalt concrete anti-rutting agent for road by in-situ graft modification

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The mass percentage is 90% polypropylene, 5% micron calcium carbonate, 5% rock pitch, and the mass fraction is polypropylene 0.5% glycidyl methacrylate and 0.05% initiator lauryl peroxide, Mix uniformly at 25°C and 1 atm, put the mixture into a single-screw extruder, melt and extrude at 190-220°C barrel temperature, 30rpm screw speed, granulate, and dry to obtain 2-6mm long The in-situ graft modified road asphalt concrete anti-rutting agent prepared by the inventive method. According to the "Asphalt Mixture Specimen Preparation Method" (T0719-1993) standard in the "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering" (JTJ 052-2000), the dynamic stability of the prepared asphalt mixture specimen is greater than 2000 times / mm, the dynamic stability of road asphalt concrete without adding road asphalt concrete anti-rutting agent has increased by 25%.

Embodiment 2

[0037] The mass percentage is 80% high-density polyethylene, 15% nano-calcium carbonate, 5% lake asphalt, and the mass fraction is maleic anhydride of high-density polyethylene 5% and 0.5% initiator benzoyl peroxide , uniformly mixed at 25°C and 1 atm, the mixture was added to a twin-screw extruder, melted and extruded at a cylinder temperature of 190-220°C and a screw speed of 100rpm, granulated, and dried to obtain 2-6mm long The in-situ graft modified road asphalt concrete anti-rutting agent prepared by the method of the invention. According to the "Asphalt Mixture Specimen Preparation Method" (T0719-1993) standard in the "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering" (JTJ 052-2000), the dynamic stability of the prepared asphalt mixture specimen is greater than 3400 times / mm, which is 112.5% ​​higher than the dynamic stability of road asphalt concrete without adding road asphalt concrete anti-rutting agent.

Embodiment 3

[0039] The mass percentage is 95% high-density polyethylene, 5% rock asphalt, and the mass fraction is maleic anhydride of 1% high-density polyethylene and 0.1% initiator tert-butyl peroxybenzoate, at 25 ℃, Uniform mixing under 1atm environment, the mixture is added to a twin-screw extruder, melt-extruded, granulated, and dried at a cylinder temperature of 190-220°C and a screw speed of 50rpm to obtain a 2-6mm length prepared by the method of the present invention. In-situ graft modified road asphalt concrete anti-rutting agent. According to the "Asphalt Mixture Specimen Preparation Method" (T0719-1993) standard in the "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering" (JTJ 052-2000), the dynamic stability of the prepared asphalt mixture specimen is greater than 3000 times / mm, which is 87.5% higher than the dynamic stability of road asphalt concrete without adding road asphalt concrete anti-rutting agent.

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Abstract

The invention belongs to the technical field of asphalt concrete additives for roads, and in particular relates to a method for preparing an asphalt concrete anti-rutting agent for a road by in-situ graft modification. The method comprises the following steps of: uniformly mixing polyolefin, an inorganic mineral filler, asphalt, graft modification monomers and an initiator fully; and adding the mixture into a screw extruder for melt extrusion to obtain the asphalt concrete anti-rutting agent for the road. The asphalt concrete anti-rutting agent for the road, which is prepared by the method, can obviously improve the anti-rutting performance of the asphalt concrete.

Description

technical field [0001] The invention belongs to the technical field of road asphalt concrete additives, and relates to a preparation method for in-situ graft modification of a road asphalt concrete anti-rutting agent. Background technique [0002] Rutting disaster is one of the main factors of early failure of asphalt concrete pavement at home and abroad. In the 1960s and 1970s, surveys in the United States showed that road surface damage caused by rutting on interstate and major highways accounted for about 70%, and Japanese surveys in the 1980s showed that road surface damage caused by rutting was as high as 80%. In our country, due to the lack of high-quality heavy-traffic road asphalt for building high-grade highways, some projects have to be built with ordinary waxy asphalt with poor performance; or even if domestic or imported heavy-traffic road asphalt is used, some Due to excessive traffic volume, serious transportation overload, or bad weather conditions, rutting h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/00C08F255/02C08F2/44C08K3/26C08K3/34C08K7/20C08L95/00C04B24/36
Inventor 解孝林周兴平廖永贵曾繁涤
Owner HUAZHONG UNIV OF SCI & TECH
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