Method for predicting pyrolysis process of environment-friendly flame-retarding asphalt

Abstract

The invention discloses a method for predicting a pyrolysis process of environment-friendly flame-retarding asphalt, belongs to the technical field of flame retarding of asphalt pavements, and solves the problems of low prediction accuracy in the pyrolysis process of an asphalt material and lack of scientific theoretical basis in the prior art. By virtue of the method, the pyrolysis behavior of the environment-friendly flame-retarding asphalt in a high-temperature environment can be deeply revealed. The method comprises the following steps: adding an environment-friendly flame retardant magnesium hydroxide in hot asphalt according to a certain proportion; fully stirring to prepare a uniform and stable flame-retarding asphalt sample; performing test through a thermogravimetric analyzer to acquire data such as a thermogravimetry-derivative thermogravimetry (TG-DTG) curve and char yield; performing optimization and identification through a reaction mechanism according to a thermal analysis kinetic theory, determining a flame-retarding asphalt pyrolysis reaction mechanism function and a conversion rate function to work out pyrolysis kinetic parameters of a flame-retarding asphalt material, namely activation energy and pre-exponential factors; establishing a flame-retarding asphalt pyrolysis model with certain flame retardant mixing amount to obtain a flame-retarding asphalt pyrolysis TG curve through the model so as to predict an asphalt pyrolysis process.

Description

technical field [0001] The invention is a new method for predicting the pyrolysis process of environment-friendly flame-retardant asphalt, which belongs to the technical field of flame-retardant asphalt pavement. Background technique [0002] Asphalt pavement has become the main type of pavement for highway tunnels and large urban underground passages because of its advantages such as comfortable driving, good anti-skid performance, low noise, short construction period, and convenient maintenance. However, asphalt will thermally decompose and burn in a tunnel fire environment, and release a large amount of toxic smoke and heat, which seriously hinders tunnel traffic, brings great difficulties to the escape of trapped people and fire rescue, and causes a large number of casualties. Therefore, it is increasingly urgent to investigate the pyrolysis process and flame retardancy of asphalt materials in high temperature environments. [0003] The hazards of asphalt pavement in th...

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for predicting the pyrolysis process of environmentally friendly flame-retardant asphalt, which uses a thermal analysis kinetic model to predict the pyrolysis process of environmentally friendly flame-retarda

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