Asphalt flame retardant
Article author：admin. time：2016-10-18 05-43-09
With the development of Expressway in our country, the number of highway tunnels is increasing, the fire caused by traffic accidents is a problem that must be considered in the course of the use of asphalt pavement. First of all, burning asphalt melting, dripping flowing, then burn, bead by bead on combustion, flow, resulting in the fire spread, causing fire. The physical and chemical processes of asphalt combustion is an exothermic decomposition, the decomposition of hydrogen, methane, benzene and alkanes of flammable gas combustion in the combustion gas, and further accelerate the decomposition of asphalt, in addition, a lot of smoke generated in the tunnel in a closed environment and harmful gas to people and environment also caused great harm.
The asphalt flame retardant produced by Guangzhou synthetic material Co., Ltd. is a halogen free flame retardant, good flame retardant, high thermal stability, and good compatibility with asphalt. Have the following flame retardant properties:
1) absorb a large amount of heat, block the heat transfer chain and reduce the surface temperature of the fuel.
2) heat release a large amount of non combustible gas coverage in the asphalt surface, cut off heat, flammable gas, oxygen to the asphalt, and dilute the content of combustible gas.
3) in the asphalt surface to form a non combustible carbonization layer of coking, the contact of oxygen and fuel, termination of combustion, resulting in self extinguishing, to achieve the purpose of flame retardant, smoke suppression.
Two, physical and chemical characteristics
Appearance: white or grey white powder
Density: 1.7~2.0g/cm3
Decomposition temperature: > 270
Solubility (25 g/100mlH2O,) g/100mlH2O:<0.1
PH value: 5.5~6.5
Fineness: 800 mesh sieve is less than or equal to 1%
Two, recommended the use of methods:
1, recommended dosage for the asphalt content of 5~15% or so, according to the asphalt brand, flame retardant oxygen index requirements, process can be timely adjust the amount of. The general added amount of 10%, for most brands of asphalt, oxygen index up to 25%. According to the specific project requirements and the matrix asphalt, the test results are accurate.
2, asphalt flame retardant can be directly added to the hot melt asphalt, to ensure that more than 30 minutes.
Three, matters needing attention:
1, moisture, anti broken, anti riot sun, anti hook.
2, the use of the process, such as accidentally enter the eyes, please rinse with fresh water, and immediately seek medical treatment.
3, packaging and storage: 25kg/ bag, under normal storage conditions shelf life of 12 months.
