Component level-based asphalt thermal decomposition behavior researching method

Abstract

The invention relates to a new method for researching the asphalt thermal decomposition behavior by deepening into the asphalt component level, belongs to the field of fire disaster safety and solves the problem that the current asphalt thermal decomposition behavior research is difficultly thorough. The method comprises the steps of: firstly, preparing component test samples, determining component content, testing the thermal decomposition property of asphalt and four components thereof by adopting differential scanning calorimetry-infrared spectroscopy technology, acquiring the thermal decomposition test data of all components in the asphalt, analyzing the thermal decomposition gradient distribution character of all the component and producing smoke ingredient and release rule; secondly, calculating the thermal analysis kinetic parameters of all the components according to the Arrhenius equation, and establishing a thermal decomposition kinetic model; finally, testing the microstructure, components and content of residues of the thermally-decomposed components by adopting a transmission electron microscope and aphotoelectron spectroscopy instrument, researching the thermal decomposition behavior of all the components in asphalt, and comparing with the asphalt test sample test results, and revealing the asphalt thermal decomposition mechanism. The method can fundamentally reveal the thermal decomposition behavior of asphalt under the high-temperature environment.

Description

technical field [0001] The invention is a new method for studying asphalt thermal decomposition behavior at the asphalt component level, and belongs to the technical field of asphalt materials. Background technique [0002] In recent years, my country's highway transportation has developed rapidly, and tunnels, as an important part of highways, have also developed simultaneously. Tunnels can be used in mountainous areas to overcome terrain and elevation obstacles, improve alignment, shorten driving mileage, increase driving speed, and protect the ecological environment. Therefore, tunnels are widely used in highway engineering, and my country has become one of the countries with the most tunnel projects and the fastest development in the world. Tunnels are developing in the direction of growth, traffic volume increases, and driving speeds increase. Tunnels have become a road section where traffic accidents occur frequently. The resulting fire accident rate is on the rise. T...

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a new method for studying the thermal decomposition behavior of asphalt based on the level of each component of asphalt. This method combines differential scanning calorimetry test and theoretical formula calculation to solve the problem that the current research on thermal decomposition behavior of asphalt is not deep enough , can deeply reveal the thermal decomposition mechanism of asphalt under high temperature environment, and provide scientific basis for adopting reasonable flame retardant technology

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