Method for evaluating suppression effect of smoke suppressor on release process of asphalt thermal decomposition product

Abstract

The invention relates to a method for evaluating suppression effect of a smoke suppressor on a release process of an asphalt thermal decomposition product, belongs to the technical field of asphalt material safety, and solves the problem that an existing asphalt smoke suppression performance evaluation method is inaccurate. According to a technical scheme combining DSC-MS (differential scanning calorimetry-mass spectrometry) and thermal analysis kinetics theoretical calculation, the method includes: firstly, testing asphalt with a DSC-MS analyzer to acquire data such as a DSC curve and a continuous mass spectrogram; secondly, analyzing the continuous mass spectrogram, understanding rules of variation, with temperature, of components and concentration of volatile matters produced during asphalt thermal decomposition, and evaluating the smoke suppression effect of the smoke suppressor on the asphalt; thirdly, determining a reaction mechanism function and a conversion rate function of the asphalt thermal decomposition process, solving thermal analysis kinetics parameter activation energy E and a frequency factor A, and quantitatively evaluating the smoke suppression effect of the smoke suppressor on the asphalt; finally, comparing E and A of matrix asphalt with those of smoke suppression type asphalt, and combining a mass spectrogram analysis result to more accurately evaluate the suppression effect of the smoke suppressor on the asphalt release thermal decomposition product.

Description

technical field [0001] The invention is an evaluation method for accurately evaluating the inhibitory effect of smoke suppressants on the release process of asphalt thermal decomposition products based on the combination of differential scanning calorimetry-mass spectrometry analysis combined with thermal analysis kinetic theoretical formula calculation, which belongs to asphalt materials technical field. Background technique [0002] With the rapid development of my country's urban construction, large-scale urban underground passages have also been developed simultaneously as an important part of the urban traffic pattern, such as Nanjing Xuanwu Lake Tunnel and Jiuhuashan Tunnel. Underground passages can be used in the construction of mountains and lakes to overcome terrain and elevation obstacles, improve alignment, shorten driving mileage, increase driving speed, and protect the ecological environment. Therefore, large-scale underground passages are widely used in urban ...

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Problems solved by technology

[0018] The purpose of the present invention is to provide a new method for accurately evaluating the inhibitory effect of smoke suppressants on the release process of asphalt thermal decomposition products. The method combines test results and theoretical formula calculations to solve the current smoke suppression performance evaluation of different types of smoke suppressants and asphalt content. The problem of inaccurate methods

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