Asphalt flame retardant, preparation method and application

Abstract

The invention discloses an asphalt flame retardant, a preparation method and application of the asphalt flame retardant. Flame-retardant asphalt is formed by mixing 75-85% of SBS modified asphalt and15-25% of a flame retardant, the flame-retardant asphalt has good flame-retardant performance, an active oxide formed through heating decomposition of a metal hydroxide is a good fireproof material and covers the surface of the asphalt to form an insulation layer, flowing of combustible volatile substances is stopped, the situation is also slowed down that external oxygen permeates into the asphalt, so that a sufficient oxidation reaction of the burning surface is difficultly conducted, and accordingly the flame retardance and smoke inhibition function is achieved; the highest limit oxygen index reaches 29.2%, the synergistic flame retardance efficiency can reach 1.34, the influence on various technical indexes of the asphalt and an asphalt mixed material is small, no poisonous gas is generated, the asphalt flame retardant is safe and environmentally friendly, the production technology is simple, the quality is table, the cost is low, and the asphalt flame retardant has high economic applicability.

Description

technical field [0001] The invention relates to the technical field of road asphalt flame retardants, in particular to an asphalt flame retardant, its preparation method and application. Background technique [0002] With the development of highway construction, highway tunnels are more and more popular because of their advantages such as high linear standards, shortened operating mileage, and reduced ecological damage. Especially in the mountainous areas of western China, their unique geographical conditions make more and more Many long tunnels are commonly used. At present, my country has become the country with the most road tunnels and the fastest development in the world. With the construction of highways in mountainous areas, there are more and more long tunnel projects. Compared with cement concrete pavement, asphalt pavement has the advantages of good skid resistance, high flatness, low noise, comfortable driving, and convenient maintenance. Therefore, asphalt con...

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Problems solved by technology

[0003] But at the same time, asphalt concrete pavement in my country's tunnel engineering mainly uses synergistic flame retardant materials such as halogen-antimony, phosphorus-nitrogen, halogen-phosphorus, and compound them with inorganic flame retardants as flame retardants. The flame-retardant asphalt mixture prepared by using the same agent has a certain flame-retardant effect, but there are problems such as large amount of smoke from the flame-retardant asphalt, strong toxicity of the flame retardant, or high cost of use, and the economic and environmental benefits are not good. It limits the development of flame-retardant asphalt tunnel pavement in China, and pure inorganic materials have the advantages of non-toxic, harmless, low-carbon environmental protection, and good economic benefits when burning. If pure inorganic materials can be used to solve various problems existing in the above-mentioned flame retardants , will be of great significance to the field of road asphalt flame retardant

With the enhancement of people's awareness of life and property safety and environmental protection, and the introduction of national security and environmental protection policies, a single inorganic flame retardant often cannot achieve a good flame retardant effect at a low dosage, while a composite flame retardant The synergist component in the agent can effectively improve its performance, and the development of a halogen-free, high-efficiency, low-smoke, low-toxicity, multi-functional composite flame retardant will be the main direction of future flame retardant development, such as hydrogen oxidation substances, zinc borate, etc., will also be further developed and applied

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