The construction of roads is often inseparable from the application of materials, and in terms of the number and scale of tunnels in China, the practical requirements of tunnel pavement are constantly improving,asphalt flame retardantMainly used for stability. It has the advantages of high flatness, good skid resistance, low noise and less dust. Due to the complex and combustible composition of asphalt, a large amount of hot smoke, toxic gases and toxic gases are released during combustion, and the tunnel environment is relatively closed. Once the fire, if not handled properly, will cause immeasurable damage.

Therefore, it is an important subject to improve the flame retardant performance of asphalt pavement. The little girl who sells flame retardants is no exception. Flame retardant is added to the asphalt flame retardant, can be used alone, can also be compounded with a variety of flame retardants, forming a synergistic flame retardant system. Asphalt flame retardant, flame retardant must meet the high efficiency, low smoke, low toxicity, environmental protection, the main performance, economic benefits;

Good thermal stability. During this period, the decomposition temperature of the flame retardant is between 250-400 ℃, which can prevent combustion to a large extent; third, the compatibility is good, which has little effect on the performance of asphalt and asphalt mixture, and can improve pavement performance. Small water solubility, good durability, good flame retardancy, insoluble in water, can make the flame retardant play a more lasting role. Fifth, the price is low, the source is wide, and the production is simple.

The combustion process mainly includes heat absorption, covering, chain suppression reaction and non-combustible gas suffocation. Asphalt releases various flammable gases when it burns. This gas further aggravates the thermal decomposition of asphalt, forming a vicious circle. Therefore, asphalt flame retardant must have the following functions: first, asphalt flame retardant can absorb the heat released by asphalt combustion, reduce the combustible surface temperature, effectively suppress the generation of combustible gas, and avoid secondary combustion;

　　asphalt flame retardantIt can form a stable carbonization layer, heat insulation and oxygen barrier on the asphalt surface, prevent flammable gas from escaping, terminate combustion and produce self-extinguishing, which is equivalent to an isolation cover. Asphalt flame retardant can capture highly active free radicals (HO-and H-) in the reaction, inhibit chain reaction, and fundamentally prevent combustion. It can decompose non-combustible gas, reduce the oxygen concentration and combustible gas concentration in the combustion zone, and prevent the spread of combustion.

The above is the performance of several aspects, in addition to high temperature conditions, asphalt produces strong dehydrating agent, so that the asphalt surface dehydration, carbonization, isolation of external combustible gas and heat, inhibit combustion. When heated, it decomposes to produce ammonia and water vapor, and ammonia dilutes the oxygen concentration in the air, which has a good flame retardant effect.asphalt flame retardantGood thermal stability, poor water solubility, small smoke, low toxicity, economical and practical, it is an ideal flame retardant material.