Multi-data-source asphalt aging test device and method in real field environment

Abstract

The invention discloses a multi-data-source asphalt aging test device and method in a real field environment. Comprising a sample holder; an instrument mounting rack is arranged at the top of the sample holder; glass is arranged at the top of the instrument mounting rack; supporting legs are arranged at the bottom of the sample holder; according to the method, the problems that the asphalt is only subjected to an indoor accelerated simulation test at present and is not accurate, and the ultraviolet aging mechanism and standard system of the asphalt in a real environment are lacked at home and abroad can be solved, and a basis can be provided for the ultraviolet aging mechanism and anti-aging measures of the asphalt in the real environment; statistical analysis is carried out by using data indexes such as temperature, humidity and ultraviolet radiation, quantitative analysis and graded extraction are carried out on natural environment inducements of asphalt aging based on an asphalt aging kinetic model, and univariate analysis, interaction analysis and coupling superimposed effect analysis are respectively carried out on different environment inducements; and calculating asphalt natural aging environment parameters of the cold and arid region.

Description

technical field [0001] The invention relates to the field of asphalt aging test, in particular to an asphalt aging test device and method in a real field environment with multiple data sources. Background technique [0002] More than 90% of my country's high-grade pavement is asphalt pavement, and its service life is directly related to the sustainable development of the national economy. The main components of asphalt pavement are asphalt, aggregates, mineral powder and additives, among which asphalt is the main binder and plays a key role in the overall performance of the material. As the asphalt pavement is under natural conditions for a long time and is subjected to the effects of oxygen, temperature, light, exhaust gas, rainfall and other factors, it is prone to aging phenomenon, which makes the adhesion ability between the pavement components decrease, and then accelerates cracking, loosening, rutting, potholes, etc. The development of early disease reduces the servic...

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Problems solved by technology

[0004] (1) There are many studies on asphalt aging, but most of them use laboratory simulation methods, lacking long-term, full-life cycle, systematic and diversified real environment of asphalt under typical climate regions and typical geological conditions The exploration of performance evolution law cannot truly reflect the natural aging mechanism of asphalt pavement performance, and the connection between laboratory asphalt aging data and field natural aging data has not been established

[0005] (2) Due to the lack of natural aging observation data of asphalt under all-weather and multi-factor coupling conditions as a support, the existing methods for simulating the aging of asphalt in service are single, and there is a lack of all-weather aging simulation test methods for coupling effects of various environmental factors. There is a big difference between the simulation and the actual pavement aging, and how the indoor UV aging equipment can truly and effectively simulate the aging of asphalt in the natural environment still needs a lot of improvement work

[0006] (3) At present, the anti-aging technology is relatively basic. The optimization process of petroleum fractionation process is complex and difficult to operate. The anti-aging effect in actual projects is not easy to guarantee, and the construction cost is expensive. Support, the selection and effect of anti-aging materials are lack of pertinence; there is no uniform and effective anti-aging quantitative evaluation method, and the anti-aging effect of anti-aging materials cannot be effectively evaluated, which increases the difficulty of selecting anti-aging materials; the mixture gradation Pore ​​structure, etc. have an important impact on the anti-aging effect of asphalt pavement, but there is currently a lack of research on the design method and construction technology of anti-aging asphalt mixture

[0007] Therefore, under the complex and harsh climate environment of asphalt, especially in the cold and arid regions of Northwest China, the daily temperature difference is large and the ultraviolet rays are strong. service life of pavement

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