Device for detecting seeping degree of wax oil in asphalt and detection method

Abstract

The invention discloses a device for detecting the seepage degree of wax oil in asphalt and a detection method, and relates to the field of asphalt material detection. Comprising a pneumatic pump and a constant-temperature heater, the bottom end of the pressure box is connected with a plurality of sample testing assemblies; and the plurality of sample testing assemblies are respectively connected with the constant-temperature heater. The pressure box is connected with the plurality of sample testing assemblies, the pneumatic pump pressurizes all the sample testing assemblies at the same time, and then the constant-temperature heater heats the sample testing assemblies at a constant temperature, so that the pressure and the environment temperature of asphalt in the actual use process are simulated, and the oil seepage degree of the asphalt is detected. The research on the oil seepage characteristic of the asphalt material under the long-term use condition is perfected; the number of the infected standard double-pickling analysis-grade filter paper is used for carrying out quantitative evaluation analysis on the oil seepage performance of the asphalt, and compared with a mode of manually measuring the infection radius, the method is more scientific and accurate.

Description

technical field [0001] The invention relates to the field of asphalt material detection, in particular to a device and a detection method for detecting the exudation degree of wax oil in asphalt. Background technique [0002] With the extensive use of waxy additives such as waste engine oil in asphalt materials, although asphalt has obvious improvements in elongation, stretching, elasticity, and compatibility with mixtures, the n-alkanes in asphalt are relatively poor. It has been proved to be able to crystallize out at low temperature, thereby causing thermally reversible aging of asphalt and affecting the low temperature performance of asphalt. In addition, n-alkanes, especially light alkanes below n-heptane, are more often present in asphalt in the form of wax oil at room temperature or close to their softening point temperature, and these mobile waxes are usually insoluble. Asphaltenes and gums. As the asphalt is used for a long time or the ambient temperature increase...

AI Technical Summary

Problems solved by technology

This oil seepage phenomenon is often a long-term behavior, which is difficult to evaluate intuitively

"Standard Test Method for Asphalt Staining Trend" is a method introduced by ASTM to evaluate the exudation degree of wax oil in asphalt. The oil seepage effect is not obvious, the measurement error is large, and the pressure and temperature of asphalt under long-term use cannot be simulated; the existing technology lacks the detection equipment for the influence of pressure and temperature on the oil seepage degree of asphalt, and it is difficult to detect the asphalt actual performance

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