Design method of efficient asphalt flame retardant multi-element compounding scheme

Abstract

The invention provides a design method of an efficient asphalt flame retardant multi-element compounding scheme, aiming at solving the problems of a current asphalt flame retardant which is poor in flame retardant efficiency and cannot implement complete thermal decomposition on asphalt to achieve efficient flame retardation. The method comprises the steps of firstly, implementing a thermegravimetry experiment depending on various components of asphalt to understand graded distribution characteristics of thermal decomposition performances of various components of the asphalt; and respectively optimizing flame retardants matched to thermal decomposition temperature intervals of various components of the asphalt and additive amounts of the flame retardants, so as to realize flame retardation on the level of various components; secondly, depending on contents of various components in the asphalt, primarily designing a flame retardant compounding scheme, investigating flame retardant efficiency of the compound multi-element flame retardant on the asphalt as well as a synergistic effect among various flame retardants, thus optimizing the flame retardant compounding scheme primarily; and finally, evaluating influence of the compound flame retardant on pavement performances of the asphalt and mixture thereof, so as to further optimize the flame retardant compounding scheme and perfecting design of the flame retardant multi-element compounding scheme. The method provided by the invention can realize efficient flame retardation in the full thermal decomposition process of the asphalt, so as to enhance fire safety of an asphalt pavement.

Description

technical field [0001] The invention relates to a multi-component compounding scheme design method of a high-efficiency flame retardant for road asphalt materials, and belongs to the technical field of road asphalt pavement fire safety. Background technique [0002] In recent years, my country's urban construction has developed rapidly, and large-scale urban underground passages have also been developed simultaneously as an important part of the urban traffic pattern, such as the Nanjing Xuanwu Lake 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 construction. At present, large-scale underground passages are developing in the direction of growth, traffic volume increases, and driving speeds increase, becoming a road sect...

AI Technical Summary

Problems solved by technology

[0013] In view of the poor flame retardant effect of current asphalt flame retardants, the present invention goes deep into the level of asphalt components, starting from the thermal decomposition characteristics of each component of asphalt, and provides a design of a multi-component compounding scheme of asphalt high-efficiency flame retardants method, so as to improve the flame retardant effect of asphalt, so that the whole process of asphalt thermal decomposition can be efficiently suppressed

Images