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Bituminization rubber particle modifying agent and preparation method thereof

A technology of rubber particles and modifiers, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of insignificant improvement of asphalt high-temperature performance, damage of asphalt low-temperature performance, unstable product quality, etc., and achieve simple modification equipment , low production cost, excellent high and low temperature performance

Active Publication Date: 2013-11-27
JIANGSU ZHONGHONG ENVIRONMENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems that existing rubber asphalt does not significantly improve the high temperature performance of asphalt and has poor compatibility with asphalt, the modification of rock asphalt damages the low temperature performance of asphalt, and the ash content in rock asphalt is easy to settle, etc., and develops small molecules of rock asphalt and rubber polymer filling Modifier for bituminized rubber particles
[0007] In addition, in view of the existing production process of polymer modified asphalt using high-speed shearing and dispersing equipment such as colloid mills, the production efficiency is low, the investment in production equipment is large, the production cost is high, the environment is polluted seriously, and the product quality is unstable. Rubber modifier, so that ordinary mixing equipment can be used to produce finished, stable rubber-modified asphalt, either on-site or in factory production

Method used

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  • Bituminization rubber particle modifying agent and preparation method thereof
  • Bituminization rubber particle modifying agent and preparation method thereof
  • Bituminization rubber particle modifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] 1. The preparation process of bituminized rubber particle modifier is to add 50 parts of waste tire rubber powder to the twin-screw machine, and then add 2 parts of plasticizer, 20 parts of petroleum asphalt, and 13 parts of rock asphalt to melt at 250 ° C , and finally add 3 parts of polyethylene for extrusion granulation, and pelletize through a pelletizer to obtain the bituminized rubber particle modifier.

[0028] 2. Prepare bituminized rubber-modified asphalt with the above-mentioned modifier, and its parts by weight are composed of 25 parts of modifier, 0.5 part of stabilizer, and 75 parts of 70# petroleum asphalt. See Table 1 for conventional technical indicators of asphalt, and Table 2 for PG classification.

[0029] Table 1 Conventional technical indicators of asphaltized rubber modified asphalt

[0030]

[0031]

[0032] Table 2 PG classification of asphaltized rubber modified asphalt

[0033]

[0034]

[0035] It can be seen from Table 1 that th...

Embodiment approach 2

[0041] 1. Modifier preparation: The preparation process of bituminized rubber particle modifier is to first add 40 parts of waste tire rubber powder to the twin-screw machine, and then add 2.5 parts of plasticizer, 25 parts of petroleum asphalt, 10 Parts of rock asphalt were melted, and finally 4.5 parts of polyethylene was added to extrude and granulate, and pelletized by a pelletizer to obtain the asphaltic rubber particle modifier.

[0042] 2. Prepare bituminized rubber-modified asphalt with the above-mentioned modifier. The parts by weight are composed of 20 parts of modifier, 0.5 part of stabilizer, and 80 parts of 70# petroleum asphalt. The PG classification of the modified asphalt can reach PG82-28.

[0043] 3. Use the modified asphalt prepared above as the cementing material, follow my country's "Technical Specifications for Highway Asphalt Pavement Construction" F40-2004, and use the continuous dense graded asphalt mixture AC-13 as the asphalt mixture type, wherein the...

Embodiment approach 3

[0045] 1. Modifier preparation: The preparation process of bituminized rubber particle modifier is to first add 60 parts of waste tire rubber powder to the twin-screw machine, and then add 5 parts of plasticizer, 30 parts of petroleum asphalt, 15 parts of Parts of rock asphalt are melted, and finally 6 parts of polyethylene are added to extrude and granulate, and pelletized by a pelletizer to obtain the asphaltic rubber particle modifier.

[0046] 2. Prepare bituminized rubber-modified asphalt with the above-mentioned modifier. The parts by weight are composed of 25 parts of modifier, 0.5 part of stabilizer, and 75 parts of 70# petroleum asphalt. The PG classification of the modified asphalt can reach PG82-28.

[0047] 3. Use the modified asphalt prepared above as the cementing material, follow my country's "Technical Specifications for Highway Asphalt Pavement Construction" F40-2004, and use the continuous dense graded asphalt mixture AC-13 as the asphalt mixture type, wherein...

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Abstract

The invention discloses a bituminization rubber particle modifying agent and a preparation method thereof. The bituminization rubber particle modifying agent comprises the following compositions in parts by weight: 20-30 parts of petroleum asphalt, 10-15 parts of rock asphalt, 40-60 parts of discarded tire rubber powder, 2-5 parts of plasticizer and 3-6 parts of polythene. According to the invention, the hard petroleum asphalt is taken as a liquid transitional medium, and the rock asphalt is used for filling and degrading the softened discarded rubber tire powder, so that waste rubber powder can be subjected to high-temperature degradation in a double screw machine; in addition, the plasticizer is used for softening waste rubber powder to enable the molecular structure of rubber powder to be comparatively incompact, and then the rock asphalt is filled; the prepared modifying agent has the advantage of improving the high-and-low temperature performance of asphalt, so that the performance grade of the asphalt modified by the modifying agent can reach PG 88-28, the performance of the modified asphalt is far superior to other polymer modified asphalt, and the modified asphalt product cannot be isolated, cannot deposit, and can be stored at low temperature or high temperature for a long time; the bituminization rubber particle modifying agent has excellent compatibility with asphalt, the normal technical index of the asphalt is superior to the traditional rubber asphalt, the rubber modified asphalt manufacturing technology and modifying equipment can be greatly simplified, the modified asphalt production efficiency can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the field of road engineering, in particular to an asphaltized rubber particle modifier and a preparation method. Background technique [0002] According to statistics, 74% of waste tires in my country become solid pollutants every year. In 2011, my country's waste tires reached 200 million pieces, and waste rubber reached 5.2 million tons. The environmental problems caused by the stacking and burning of waste tires have seriously troubled environmental workers. In the field of road engineering, using waste rubber as a modifier has become an effective method, and rubber asphalt technology has also attracted much attention for its excellent road performance and significant environmental protection significance. Practice at home and abroad has proved that rubber asphalt technology plays a significant role in improving pavement fatigue resistance, durability, low-temperature crack resistance, preventing crack expansion, and noise...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L23/06C08K5/12
Inventor 王立志王鹏任瑞波耿立涛徐强高晓宁
Owner JIANGSU ZHONGHONG ENVIRONMENT TECH CO LTD
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