A method for evaluating the effect of anti-aging agents on asphalt short-term aging
An anti-aging agent and short-term aging technology, applied in the direction of removing certain component weighing, instrumentation, color/spectral characteristic measurement, etc., can solve the problems of large interference from human factors, accurate evaluation, etc., to improve road performance, Effects of improved modification efficiency, improved durability and service levels
Inactive Publication Date: 2020-08-04
NANJING FORESTRY UNIV
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] In view of the fact that the current conventional evaluation methods at the macro level are greatly disturbed by human factors, and it is difficult to more objectively and accurately evaluate the impact of anti-aging agents on the short-term aging performance of asphalt and the volatiles released during the aging process from the micro level, the present invention adopts isothermal analysis. -Infrared spectroscopy combined technology to analyze the impact of anti-aging agents on the short-term aging process of asphalt, and evaluate the improvement of anti-aging agents on asphalt aging from the micro level
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The invention provides a method for evaluating the influence of an anti-aging agent on the short-term aging of asphalt, and the specific implementation steps are as follows:
[0013] (1) Select asphalt samples and anti-aging agent types, and prepare various anti-aging agent-modified asphalt samples according to different addition ratios. , determine the short-term aging simulation test temperature of asphalt is 135 ℃, keep the constant temperature for 4 hours;
[0014] (2) Take 10 mg of asphalt sample and put it into a thermogravimetric (TG)-Fourier transform infrared spectrometer (FTIR) synchronous analyzer for testing, raise it from room temperature to 135 °C at a rate of 40 °C / min, and keep the temperature for 4 hours, during which Continuous air flow at a flow rate of 60ml / min to obtain asphalt TG, DTG data and char formation rate;
[0015] (3) Using purge air at a flow rate of 120ml / min, the volatiles produced during the asphalt thermo-oxidative aging process are ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention is a method for evaluating the short-term aging effect of anti-aging agents on asphalt, which belongs to the technical field of road asphalt pavement materials, and solves the problem that the current conventional macro-level test and evaluation methods are greatly disturbed by human factors, and it is difficult to objectively and accurately evaluate the effects of anti-aging agents on asphalt. Short-term aging performance of asphalt and its influence on escaping volatiles. The present invention firstly refers to the method for simulating the short-term aging of asphalt mixture, determines the asphalt aging simulation test temperature and the constant temperature holding time, adjusts the thermal analyzer, and sets the program baseline for simulating short-term aging; Liye infrared spectrometer analyzer was used to test and obtain test data; compare the test results before and after adding anti-aging agent, analyze the effect of anti-aging agent type and addition amount on the short-term aging performance of asphalt and the volatile components released, and based on this, optimize anti-aging for asphalt The types of additives and the appropriate addition amount can improve the anti-aging performance and durability of asphalt, and prolong the service life of asphalt pavement.
Description
technical field [0001] The invention relates to a method for evaluating the effect of an antiaging agent on short-term aging of asphalt, and belongs to the technical field of pavement materials. Background technique [0002] As the main economic artery of the country, expressway has been paid more and more attention by the government and society. Asphalt pavement has become the most important form of pavement due to its superior performance and driving comfort. However, in the process of use, asphalt pavement often encounters problems such as many early diseases and short service life. In addition to design and construction reasons, it is not unrelated to the aging resistance of asphalt mixture. Asphalt aging is divided into short-term aging and long-term aging. These two types of aging do not exist in isolation. During the construction process, due to the high temperature of mixing and paving, the light components in asphalt are easily volatilized, resulting in component ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N21/35G01N21/3504
Inventor 许涛胡智慧王沫盛晓慧
Owner NANJING FORESTRY UNIV