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Asphalt pavement rubber plastic composite anti-rut agent and preparation method thereof

A technology of asphalt pavement and anti-rutting agent, which is applied in the field of materials, can solve the problems of low-temperature performance reduction of asphalt mixture, unfavorable promotion and use, and high product cost, so as to improve low-temperature crack resistance and water stability, increase market competitiveness, The effect of low product cost

Inactive Publication Date: 2008-08-06
陕西长大博源公路养护科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention mainly uses high-molecular thermoplastic polymers to improve the high-temperature anti-rutting ability of asphalt mixtures, but polyolefins are prone to brittle cracks at low temperatures, resulting in reduced low-temperature performance of asphalt mixtures. In addition, the raw materials used in this invention are industrially synthesized high polymer materials, resulting in high product cost, which is not conducive to popularization and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Taking the production of product 100kg of the present invention as an example, the raw materials used and their weight proportions are:

[0030] LDPE 78.83kg

[0031] Waste rubber powder 11.26kg

[0032] Construction asphalt 9.01kg

[0033] Polyethylene masterbatch 0.90kg

[0034] The density of the low-density polyethylene in the above proportion is 0.917~0.932g / cm 3 , the product name is 2426H, low-density polyethylene is produced by Shanghai Jinmao Co., Ltd.; waste rubber powder is waste tire rubber powder with a fineness of 40-80 mesh, and the rubber content is more than 80%, produced by Sichuan Lvyuan Technology Co., Ltd.; construction asphalt The penetration degree of the product is 10-50 (measured in 0.1mm); polyethylene masterbatch is produced by Beijing Yanshan Branch of China Petroleum & Chemical Corporation.

[0035] Its preparation method is as follows:

[0036]Mix the raw materials of this example, stir evenly, add them into the hopper of the screw ext...

Embodiment 2

[0043] Taking the production of product 100kg of the present invention as an example, the raw materials used and their weight proportions are:

[0044] LDPE 87.41kg

[0045] Waste rubber powder 8.74kg

[0046] Construction bitumen 3.50kg

[0047] Polyethylene masterbatch 0.35kg

[0048] Its preparation method is as follows:

[0049] Mix the raw materials of this example, stir evenly, add them into the hopper of the screw extruder, turn on the temperature control switch of the screw extruder, and control the heating temperature of the four zones respectively: the first zone is 120°C, the temperature of the second zone is 135°C, The temperature in the third zone is 150°C, and the temperature in the fourth zone is 165°C. Adjust the speed of the screw extruder to 30-60 rpm, turn on the hopper switch, and the mixture is evenly mixed and kneaded by the screw extruder to extrude the semi-finished cylindrical strip. , cooled in a water bath at room temperature, put into a cutting ...

Embodiment 3

[0056] Taking the production of product 100kg of the present invention as an example, the raw materials used and their weight proportions are:

[0057] LDPE 72.07kg

[0058] Waste rubber powder 18.02kg

[0059] Construction asphalt 9.01kg

[0060] Polyethylene masterbatch 0.90kg

[0061] Its preparation method is as follows:

[0062] Mix the raw materials of this example, stir evenly, add them into the hopper of the screw extruder, turn on the temperature control switch of the screw extruder, and control the heating temperature of the four zones respectively: the first zone is 130°C, the temperature of the second zone is 145°C, The temperature in the third zone is 160°C, the temperature in the fourth zone is 180°C, adjust the speed of the screw extruder to 30-60 rpm, turn on the hopper switch, the mixture is evenly mixed and kneaded by the screw extruder, and the semi-finished cylindrical strip is extruded , cooled in a water bath at room temperature, put into a cutting ma...

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Abstract

A pitch road rubber composite anti-rutting agent is prepared from polyethylene of 50-80 accounts, rubber powder of 5-20 accounts, construction pitch of 2-10 accounts and polyethylene color masterbatch of 0.2-1 accounts, wherein the rubber powder is waste rubber powder. The preparation method comprises mixing materials, mixing, heating, mixing milling, extruding and cutting or grinding. The prepared pitch road rubber composite anti-rutting agent added into pitch mixture has dynamic stability, break stress, residue stability and residue strength ratio of JTG F40-2004 road pitch construction technique standard published by Ministry of Communication. The invention has low cost, energy saving, environment protection, easy operation and the application for pitch road anti-rutting agent.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an anti-rutting admixture for asphalt pavement prepared by using polyethylene and rubber powder as main raw materials. Background technique [0002] Due to its excellent performance, asphalt pavement occupies a considerable proportion in highways. But in recent years, due to the limitations of the performance of asphalt pavement raw materials and the influence of external factors such as traffic volume, increase of heavy and overloaded vehicles, and deterioration of weather conditions, asphalt pavement is facing severe tests. Many newly built asphalt pavements have early diseases soon after they are opened to traffic, among which rutting has become one of the most serious early diseases that endanger asphalt pavement. Rutting is a kind of road surface damage phenomenon similar to grooves formed on the asphalt pavement along the driving direction of the vehicle due ...

Claims

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Application Information

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IPC IPC(8): C08L23/06B29C47/38B29C47/92C08L95/00C08L21/00B29C48/395B29C48/92
CPCB29C48/0022B29C48/022B29C48/06B29C48/92B29C2948/9259B29C2948/92704
Inventor 徐培华商博明周俊秋
Owner 陕西长大博源公路养护科技有限公司
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