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SBS-rubber powder composite modified asphalt and preparation method thereof

A technology of composite modified asphalt and rubber powder, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of poor storage stability, limited increase in high temperature softening point, high viscosity, etc., achieve stable performance and improve rutting resistance performance, low noise effect

Active Publication Date: 2015-12-23
辽宁省交通科学研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, rubber powder modified asphalt has defects such as high viscosity and poor storage stability. At the same time, the improvement of high temperature softening point is quite limited. For high temperature and hot areas, only rubber powder is not enough.

Method used

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  • SBS-rubber powder composite modified asphalt and preparation method thereof
  • SBS-rubber powder composite modified asphalt and preparation method thereof
  • SBS-rubber powder composite modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the proportioning of the present embodiment, with 1.13kg as 1 part, the parts by weight of each component of the raw materials used are:

[0024] 21 parts of waste rubber powder

[0025] 2 parts of SBS modifier

[0026] Stabilizer 0.4 parts

[0027] Activator 0.04 part

[0028] 77 parts of asphalt.

[0029] Its preparation method is:

[0030] After compounding according to the above component ratios, preheat the asphalt to 180°C, add SBS modifier for high-speed shear dispersion for 20 minutes, add activator, rubber powder and stabilizer, and high-speed shear dispersion for 2 hours at 185°C. That is, the product of the present invention is obtained.

[0031] The main detection indicators of the SBS rubber powder composite modified asphalt prepared in this example are shown in Table 1.

[0032]

[0033] In order to verify the performance of the modified asphalt of the present invention, the inventor used the SBS rubber powder compound modified asphalt prepared...

Embodiment 2

[0039] In the proportioning of the present embodiment, with 0.87kg as 1 part, the parts by weight of each component of the raw materials used are:

[0040] 18 parts of waste rubber powder

[0041] 2.5 parts of SBS modifier

[0042] Stabilizer 0.3 parts

[0043] Activator 0.03 part

[0044] 80 parts of asphalt.

[0045] Its preparation method is identical with embodiment 1.

[0046] After testing, after adopting the SBS rubber powder composite modified asphalt of the present invention, the dynamic stability of the asphalt mixture, the failure strain, the residual strength ratio, the performance index of the fatigue action times are compared with the test results of the SBS modified asphalt mixture. The indicators have been greatly improved.

Embodiment 3

[0048] In the proportioning of the present embodiment, with 0.85kg as 1 part, the parts by weight of each component of the raw materials used are:

[0049] 15 parts of waste rubber powder

[0050] 3 parts of SBS modifier

[0051] Stabilizer 0.2 parts

[0052] Activator 0.03 parts

[0053] 82 parts of asphalt.

[0054] Its preparation method is identical with embodiment 1.

[0055] After testing, after adopting the SBS rubber powder composite modified asphalt of the present invention, the dynamic stability of the asphalt mixture, the failure strain, the residual strength ratio, the performance index of the fatigue action times are compared with the test results of the SBS modified asphalt mixture. The indicators have been greatly improved.

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Abstract

The invention belongs to the technical field of materials for asphalt pavements, and particularly relates to SBS-rubber powder composite modified asphalt and a preparation method thereof. The SBS-rubber powder composite modified asphalt is prepared from, by mass, 15-21 parts of waste rubber powder, 2-3 parts of SBS modifying agents, 0.2-0.4 part of stabilizing agents, 0.03-0.04 part of activating agents and 75-82 parts of asphalt. The preparation method of the asphalt comprises the steps that the matrix asphalt is preheated to 180 DEG C, the SBS modifying agents are added into the hot asphalt, high-speed shearing dispersion is performed for 20 min, then the activating agents, the rubber powder and the stabilizing agents are added, and high-speed shearing dispersion is performed on the temperature condition of 185 DEG C for 2 h. According to the SBS-rubber powder composite modified asphalt, a pavement paved with SBS-rubber powder composite modified asphalt mixtures has the advantages of being stable, comfort, low in noise and the like, the quality of the pavement can be obviously improved, the service life of the pavement can be prolonged, use is convenient, price is low, the properties are stable, and not only can the anti-rutting performance of the asphalt mixtures be improved, but also the obvious effects on improving the low-temperature crack resistance, water stability and fatigue resistance of the asphalt mixtures can be achieved.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement materials, and in particular relates to SBS rubber powder composite modified asphalt and a preparation method thereof. Background technique [0002] With the rapid development of highway construction in our country, modified asphalt has been widely used. Among them, SBS modified asphalt and rubber powder modified asphalt are widely used. [0003] SBS modifier can significantly improve the high and low temperature performance, elastic performance and cohesive adhesion performance of asphalt, can improve the rutting resistance and skid resistance of the road surface, and improve the safety and comfort of driving on the road surface, and has become a commonly used polymer modified asphalt modifiers. But there are also some defects, such as poor aging resistance and fatigue resistance. At the same time, with the rapid increase in the demand for SBS modified asphalt, the supply of SBS is in...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L53/02
Inventor 李洪斌周健楠刘云全朱建平南雪峰
Owner 辽宁省交通科学研究院有限责任公司
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