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Rubber powder and SBS modified compound modified asphalt and preparation method thereof

A technology of compound modified asphalt and modified asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of complex construction process, less dry process practice, and superior comprehensive performance, and achieves simple production process and high performance. And the effect of stability guarantee and cost saving

Inactive Publication Date: 2018-05-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through practice in recent years, although rubber asphalt has better high-viscosity and high-elastic properties than SBS modified asphalt, there are problems such as complex construction process, insufficient storage stability of wet process, and less practice of dry process, and the overall performance is not good. No superiority than SBS modified asphalt and cannot be replaced

Method used

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  • Rubber powder and SBS modified compound modified asphalt and preparation method thereof
  • Rubber powder and SBS modified compound modified asphalt and preparation method thereof
  • Rubber powder and SBS modified compound modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The method for preparing rubber powder / SBS composite modified asphalt of the present invention comprises the following steps:

[0045] (1) Eucommia gum grafted with maleic anhydride

[0046] The grafting of Eucommia gum is completed in a closed rubber mixer (referred to as internal mixer). First, the Eucommia gum is matured. The specific steps are to add Eucommia gum to the internal mixer, and then set the temperature of the internal mixer at 150±5°C, the rotation speed is set at 50±5rad / min, and the entire curing process is controlled within 1h~1.2h. In the second step, slowly add the cured eucommia gum into 50ml xylene, and heat the xylene solution to 120±5°C while adding, and at the same time keep stirring to gradually dissolve the eucommia gum in the xylene. After Eucommia gum is completely dissolved in xylene, gradually cool down to the reaction temperature (80±2°C), then add maleic anhydride according to the designed formula, stir continuously to promote the diss...

Embodiment 1

[0056] Example 1: Using three different quality grades of SBS modified asphalt to make rubber powder / SBS composite modified asphalt

[0057] The performance test results of SBS modified asphalt A, B, C are shown in Table 4

[0058] Table 4 Test results of three kinds of SBS modified asphalt

[0059]

[0060] Composite modified asphalt was produced according to the technical scheme mentioned above, and its performance test was carried out. The test results are shown in Table 5.

[0061] Table 5 Test results of three kinds of rubber powder / SBS composite modified asphalt

[0062]

[0063] Comparing Table 4 and Table 5, it can be seen that SBS modified asphalt with different properties is used to make rubber powder / SBS composite modified asphalt. promote. Can be applied to engineering practice

Embodiment 2

[0064] Example 2: Using rubber powder / SBS composite modified asphalt as a binder to produce asphalt mixture, the used gradation is AC-13C, according to the test specified in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20 2011) Method, perform performance test, and compare with SMA. The results are shown in Table 6.

[0065] Table 6 Performance test results of asphalt mixture

[0066] Test items

[0067] It can be seen from Table 6 that the performance of rubber powder / SBS composite modified asphalt mixture is relatively close to that of SMA, and it is better than SMA in terms of high temperature anti-rutting, which shows that the composite modified asphalt road performance of the present invention is also very excellent .

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Abstract

The invention discloses rubber powder and SBS modified compound modified asphalt and a preparation method thereof. The modified asphalt is prepared from SBS modified asphalt, rubber powder, gutta-percha, an ampholytic surfactant and an antiageing agent in proportion. The compound modified asphalt is prepared from the following components in percentage by weight: 87-89% of SBS modified asphalt, 11.5-9.5% of rubber powder, 0.8-0.6% of gutta-percha, 0.3-0.4% of the ampholytic surfactant and 0.4-0.5% of the antiageing agent. The high- and low-temperature and mechanical properties of the compound modified asphalt are improved greatly compared with those of single SBS modified asphalt and the compound modified asphalt used for an asphalt mixture can be equivalent to stone mastic asphalt in pavement performance. Performances in some aspects are superior to those of the SMA pavement but the cost is lower than that of the SMA pavement. The compound modified asphalt can be applied to high gradeasphalt pavements and can improve the using performance of the pavement and prolong the service life, and meanwhile, the construction cost can be reduced, and the cost is saved.

Description

technical field [0001] The invention relates to rubber powder and SBS composite modified asphalt and a preparation method thereof, which can be applied to high-grade asphalt pavement construction and belongs to the field of road engineering. Background technique [0002] As of the end of 2016, the total mileage of expressways in China has exceeded 130,000 kilometers, most of which are asphalt concrete pavement, and SBS modified asphalt, as the most widely used binder, is widely used in the middle and upper layers of high-grade pavement. With the use of SBS modified asphalt for nearly 30 years, some of its performance weaknesses have also begun to emerge, such as poor low temperature performance and insufficient crack resistance. Furthermore, the sharp increase in traffic volume, the increasing axle load of vehicles, the repeated overloading phenomenon, and the asphalt concrete surface directly bears the temperature stress caused by extreme changes in high and low temperature...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L51/04
CPCC08L95/00C08L2205/035C08L53/02C08L21/00C08L51/04
Inventor 顾兴宇刘勇李志刚徐磊
Owner SOUTHEAST UNIV
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