Method for improving anti-ultraviolet aging characteristic of SBR modified asphalt

A technology of anti-ultraviolet aging and modified asphalt, which is applied in the field of improving its anti-ultraviolet aging performance and SBR modified asphalt, which can solve the problems of poor anti-ultraviolet aging performance and insufficient performance, and achieve easy implementation, improved effect, and simple addition process Effect

Inactive Publication Date: 2009-05-20
TONGJI UNIV
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Problems solved by technology

However, the above test results show that its anti-ultraviolet aging performance is not good, not as good as SBS modified asphalt

Method used

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  • Method for improving anti-ultraviolet aging characteristic of SBR modified asphalt
  • Method for improving anti-ultraviolet aging characteristic of SBR modified asphalt

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples.

[0021] The anti-ultraviolet aging additive referred to in the present invention is suitable for the SBR modified asphalt mixture of the upper layer. Before the official construction, the additives are transported to the construction site. Such additives are generally packed in 20kg barrels, which are well sealed and easy to transport. Before construction, the total amount of mixture can be calculated according to the length, width, and thickness of the road surface, and then the total amount of asphalt can be calculated according to the optimal asphalt ratio of the upper layer, and an asphalt tank can be reserved according to the site construction conditions. The asphalt required for the construction section.

[0022] According to the type of additive and the addition ratio (such as the additive amount of CeO2 nanomaterials is 8‰; the additive amount of anti-ultraviolet absor...

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Abstract

A method for improving the ultraviolet radiation and aging resistance property of SBR modified asphalt comprises the following procedures: an ultraviolet radiation resistant addictive is stirred and mixed with hot asphalt until being fully dispersed in the asphalt; and then the mixture is stirred and mixed with aggregate. The selected addictive is CeO2 nanophase materials which can absorb ultraviolet radiation or an ultraviolet absorbent UV-531; the use amount of the addictive is eight thousandths to thirteen thousands of the use amount of the asphalt; and the temperature range of the hot asphalt is 160 to 170 DEG C. The method can improve the low-temperature ductility index obviously, and the amount of the addictive is only eight thousandths to thirteen thousands of the modified asphalt; the improved ductility index at 10 DEG C is twice to three times of the original one; furthermore, the addition technique is simple and easy to be realized, and is especially suitable for being used in the special environment of cold and high-altitude areas which are irradiated by intense ultraviolet radiation.

Description

technical field [0001] The invention belongs to the field of traffic and transportation engineering, and relates to SBR modified asphalt, in particular to a method for improving its anti-ultraviolet aging performance. Background technique [0002] SBR modified asphalt is a commonly used asphalt mixture bonding material in low-temperature and cold regions. There have been many studies on its high-temperature stability, low-temperature crack resistance, water stability, and fatigue resistance at home and abroad, but there is no research on SBR The UV aging resistance of modified asphalt is not as good as that reported by SBS modified asphalt. [0003] Liaoning Petrochemical University once added different mass ratios of nano-CeO to Liaohe AH-70 asphalt 2 Composite UV-absorbing anti-aging agent, and studied the effect of anti-aging agent on the quality loss of asphalt (Petrochemical Technology and Application 2005 (3) 196-198, Zhao Xiaozheng, etc.). [0004] In this study, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B22/06
Inventor 刘黎萍孙立军董文龙
Owner TONGJI UNIV
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