Rubber powder modified asphalt and preparation method thereof

A technology of modified asphalt and rubber powder, which is applied in the field of asphalt, which can solve the problems of poor storage stability, index changes, and unusability of asphalt, and achieve excellent elasticity and deformation ability, increased viscosity, and reduced penetration.

Inactive Publication Date: 2011-11-16
河南现代交通道路科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current rubber asphalt has the disadvantage of poor storage stability. When it is stored for a long time, the index changes greatly. It must be used up within two days, otherwise it will not be used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: 780g of base asphalt, 215g of waste rubber powder, 4.2g of extension agent and 0.8g of stabilizer.

[0012] Preparation method: (1) prepare extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 120°C for 1.5 hours; (2) prepare stabilizer, Mix butyl thiuram with antioxidant 1076, then stir at 65°C for 1 hour; (3) prepare rubber powder modified asphalt, heat 780g of base asphalt to 180°C, then add 215g of waste rubber powder and 4.2 g the extension agent prepared in step (1) and mixed for 1.5 hours, then ground by colloid mill, after stirring for 2 hours, add 0.8g of the stabilizer prepared in step (2), and continue stirring for 2 hours to obtain modified rubber powder asphalt.

Embodiment 2

[0013] Example 2: 850g of base asphalt, 143g of waste rubber powder, 6g of extension agent and 1g of stabilizer.

[0014] Preparation method: (1) prepare extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 130°C for 1 hour; (2) prepare stabilizer, Mix butyl thiuram with antioxidant 1076, then stir at 70°C for 0.8 hours; (3) prepare rubber powder modified asphalt, heat 850g base asphalt to 190°C, then add 143g waste rubber powder and 6g Mix the extension agent prepared in step (1) for 1 hour, then shear and stir, add 1 g of the stabilizer prepared in step (2) after stirring for 1.5 hours, and continue stirring for 2.5 hours to obtain rubber powder modified asphalt.

Embodiment 3

[0015] Example 3: 900g of base asphalt, 91g of waste rubber powder, 7.8g of extension agent and 1.2g of stabilizer.

[0016] Preparation method: (1) Prepare the extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 140°C for 0.5 hours; (2) Prepare the stabilizer, mix the accelerator Mix butyl thiuram with antioxidant 1076, then stir at 75°C for 0.5 hours; (3) prepare rubber powder modified asphalt, heat 900g of base asphalt to 200°C, then add 91g of waste rubber powder and 7.8 g the extension agent prepared in step (1) and mixed for 0.5 hours, then ground by a colloid mill, and after stirring for 1 hour, add 1.2 g of the stabilizer prepared in step (2), and continue stirring for 3 hours to obtain modified rubber powder asphalt.

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PUM

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Abstract

The invention provides a rubber powder modified asphalt, which is prepared from the following raw materials in percentage by mass: 78 to 90 percent of matrix asphalt, 9.1 to 21.5 percent of waste rubber powder, 0.4 to 0.8 percent of ductility improver and 0.08 to 0.12 percent of stabilizing agent, wherein the ductility improver is prepared by stirring rubber softening oil and diethyl phthalate for 0.5 to 1.5 hours at the temperature of between 120 and 140 DEG C; and the stabilizing agent is prepared by stirring an accelerant, namely tetramethyl thiuram monosulfide, and an antioxidant for 0.5 to 1 hour at the temperature of between 120 and 140 DEG C. The rubber powder modified asphalt has good high temperature stability, low temperature cracking resistance and water damage resistance, and has better ageing resistance and fatigue resistance than those of other modified asphalt mixtures, so a highway paved by the rubber powder modified asphalt has the characteristics of smoothness, comfort, low noise and the like, the quality of a road surface can be improved remarkably, and the service life of the road surface can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of asphalt, and relates to rubber powder modified asphalt and a preparation method of the asphalt. Background technique [0002] The use of waste rubber powder to modify asphalt has a history of many years in foreign countries. The research on the application of waste rubber powder modified asphalt to roads in my country began in the 1980s. Since the beginning of the 21st century, my country's research on rubber asphalt has been increasing day by day. There are two main reasons: First, with the increase in the number of bicycles and various types of motor vehicles, the number of waste rubber tires is increasing, and the increasing number of waste tires is also increasing. Threatening the living environment of the people, the total number of waste rubber tires in my country has reached 120 million in 2005, and it is imminent to find ways to use a large number of waste rubber tires; the second is the encouragem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B18/22C04B24/04
CPCY02W30/91
Inventor 王辉尹建军姚斌关京刘伟任晓东郭海云卢玉江齐明陈峰闫勇付立军苗保民陈扬
Owner 河南现代交通道路科技有限责任公司
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