Composite flame retardant formula for inhibiting asphalt combustion process and preparation method of composite flame retardant formula

Abstract

The invention aims to provide a composite flame retardant formula for inhibiting the asphalt combustion process and a preparation method of the composite flame retardant formula, and aims to solve the problems that a conventional asphalt flame retardant is poor in flame retardancy effect and high-efficiency flame retardancy cannot be achieved in the whole combustion process of asphalt. The preparation method comprises the following steps: firstly, testing four components of the asphalt so as to obtain the contents of the components; based on the characteristic that combustion decomposition temperature intervals of the components of the asphalt are in gradient distribution, preferring environment-friendly inorganic flame retardants matched with the components; performing surface modification on the preferred flame retardants, and confirming addition amounts and addition methods of the flame retardants; finally, according to thermogravimetry testing results, optimizing the adulteration amount of the flame retardants or the compounded flame retardants, and compounding the flame retardants according to the contents of the components of the asphalt, thereby obtaining the composite flame retardant formula for inhibiting the combustion behaviors of the asphalt at multiple stages. By adopting the preparation method provided by the invention, high-efficiency flame retardancy on the whole combustion process of the asphalt can be achieved, and the fire hazard security of asphalt pavements can be improved.

Description

technical field [0001] The invention relates to a composite flame retardant formula for inhibiting road asphalt burning and a preparation method thereof, belonging to the technical field of asphalt pavement fire safety. Background technique [0002] With the development of my country's expressways and the acceleration of urbanization, the number of tunnels is increasing. At the same time, tunnel fire accidents also occur frequently. According to foreign statistics, the frequency of tunnel fires is 10 to 17 times per 100 million vehicle kilometers. The reason is that, on the one hand, the tunnel is in a semi-closed state, the visibility inside and outside the tunnel is quite different, and the traffic volume and traffic load are increasing day by day; Complex polymer materials composed of elements are flammable and will aggravate the spread of tunnel fires, and are prone to produce a large amount of toxic smoke during combustion. Studies have shown that 85% of fire deaths a...

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Problems solved by technology

[0007] The object of the present invention is to provide a compound flame retardant formulation and preparation method for inhibiting the combustion of road asphalt materials. According to the gradient distribution characteristics of the combustion and decomposition temperature range of each component of asphalt, the method selects an environmentally friendly flame retardant that matches the combustion characteristics of each component. Type inorganic flame retardant, and determine its compounding ratio and preparation method, so as to solve the problem that the current asphalt flame retardant has a single component, poor flame retardant effect, can only play a flame retardant effect on a certain combustion stage of asphalt, and cannot fully control the asphalt combustion. The problem of efficient flame retardant process

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