Anti-rut high-viscosity asphalt modifier, and preparation method and application thereof

An asphalt modifier and high-viscosity technology, which is used in building components, building insulation materials, buildings, etc., can solve the problems of difficult to control production costs, excessive modifier dosage, and high modifier dosage, and achieve improvement. The effect of storage stability, excellent high temperature stability and simple production process

Inactive Publication Date: 2012-11-28
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN200510112047.8 discloses a high-viscosity modified asphalt containing asphalt, styrene-isoprene-styrene block copolymer, polyethylene wax and sulfur. Its viscosity at 60°C can meet the technical requirements of high-viscosity asphalt. However, the low-temperature performance is still insufficient, and the amount of the modifier is too large (>14%), and the problem of high cost has not been solved; CN201010179374.6 discloses a method composed of SBS, petroleum resin, aromatic oil, antioxidant, lubricant, adhesive The high-viscosity anti-rutting asphalt modifier composed of sticking agent and initiator, the viscosity of the high-viscosity asphalt prepared at 12% (internal mixing) can reach 250KPa.s at 60°C, and the softening point is close to 100°C. The low-temperature performance is also

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 10 parts of low-density polyethylene, 10 parts of ethylene-octene copolymer (POE), C 9 15 parts of petroleum resin and 10 parts of regenerated rubber powder (120 mesh) were uniformly mixed in a mixer, melted and extruded by a single-screw extruder and pelletized to obtain a modifier matrix. The temperature control parameters and pelletizing speed of each zone of the extruder are shown in Table 1.

[0029] Table 1 The temperature control parameters of each zone of the extruder and the speed of the pelletizer

[0030] nose

[0031] Due to the low softening point of petroleum resin, when the temperature in zone 1 is 80°C, it will partially melt and bond with other materials to block the feeding port, so the temperature in zone 1 should not be too high. Take 100 parts of No. 70 base asphalt and 12 parts of rutting-resistant high-viscosity asphalt modifier, mix them at 180°C, and shear them for 60 minutes at a speed of 3800 r / min by a high-speed shearing machine t...

Embodiment 2

[0033] 10 parts of high-density polyethylene, 10 parts of styrene-butadiene-styrene block copolymer SBS, C 5 20 parts of petroleum resin and 1 part of natural rubber powder (100 mesh) were uniformly mixed in a mixer, melted and extruded by a twin-screw extruder and granulated to obtain a modifier matrix. The temperature control parameters and cutting speed of each zone of the extruder are shown in Table 2.

[0034] Table 2 The temperature control parameters of each zone of the extruder and the speed of the pelletizer

[0035] nose

[0036] Take 100 parts of No. 70 base asphalt and 10 parts of anti-rutting high-viscosity asphalt modifier, mix them at 180°C, and cut them for 60 minutes at a speed of 3800r / min by a high-speed shearing machine to obtain the finished high-viscosity modified asphalt . After testing, its viscosity at 60°C reaches 58KPa.s, at 135°C it reaches 2.6Pa.s, its softening point reaches 88°C, and its ductility at 5°C reaches 39cm.

Embodiment 3

[0038] Mix 20 parts of polypropylene, 20 parts of styrene-butadiene-styrene block copolymer SIS, 30 parts of coumarone resin, and 8 parts of recycled rubber powder of styrene-butadiene rubber (80 mesh) in a mixer After homogenization, melt extruding by twin-screw extruder and granulation to obtain modifier matrix. The temperature control parameters and pelletizing speed of each zone of the extruder are shown in Table 3.

[0039] Table 3 The temperature control parameters of each zone of the extruder and the speed of the pelletizer

[0040] nose

[0041] Take 100 parts of No. 50 base asphalt and 8 parts of anti-rutting high-viscosity asphalt modifier, mix them at 180°C, and cut them for 60 minutes at a speed of 3800r / min by a high-speed shearing machine to obtain the finished high-viscosity modified asphalt . After testing, its viscosity at 60°C reaches 46KPa.s, at 135°C it reaches 2.4Pa.s, its softening point reaches 83°C, and its ductility at 5°C reaches 37cm.

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Abstract

The invention discloses an anti-rut high-viscosity asphalt modifier, and a preparation method and application thereof. The anti-rut high-viscosity asphalt modifier is prepared from the following components in parts by mass: 10-30 parts of polyolefin, 10-30 parts of elastomer, 15-40 parts of tackifying resin and 1-20 rubber powder. The preparation method comprises the following steps: evenly mixing polyolefin, elastomer, tackifying resin and rubber powder in a mixer, carrying out melt extrusion, granulating and drying. The doping amount of the anti-rut high-viscosity asphalt modifier is 5-14% of the asphalt by mass. The anti-rut high-viscosity asphalt modifier disclosed by the invention can obviously enhance the 60 DEG C viscosity, softening point, low-temperature ductility and other technical indexes of the asphalt. The production technique of the anti-rut high-viscosity asphalt modifier is simple and convenient, and has the advantage of low cost.

Description

technical field [0001] The invention relates to a rutting-resistant high-viscosity asphalt modifier, and also relates to a preparation method and application of the rutting-resistant high-viscosity asphalt modifier. Background technique [0002] Asphalt pavement has become the most common pavement form in the world due to its advantages of good continuity, comfortable driving, low noise and easy maintenance. According to incomplete statistics, asphalt pavement accounts for 79% of paved roads in Japan. %, in China and some European countries, the proportion of asphalt pavement reaches 90%, while in the United States, about 95% of the pavement is asphalt pavement. However, due to the comprehensive effect of rapid increase in traffic volume, heavy axle load, channelized traffic and other factors, many asphalt pavements often have serious diseases after only a few years of opening to traffic, and rutting has become one of the most important forms of disease on asphalt pavements,...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L57/02C08L23/06C08L23/12C08L23/08C08L53/02C08L7/00C08L9/06C08L9/02C08L11/00C08L9/00B29C47/92B29B9/06B29C48/92
CPCB29C48/04
Inventor 李九苏刘朝晖戴聆春贾文科欧阳岚王宇文
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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