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Preparation method of halogen-free environmental protection flame-retardant asphalt for tunnel road surface
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A kind of asphalt, environmental protection technology, applied in the direction of roads, roads, building insulation materials, etc., to delay the fire, reduce smoke, improve the effect of flame retardancy
Inactive Publication Date: 2011-05-18
CHONGQING POFUN TRAFFIC TECH
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However, due to the large amount of smoke and hydrogenhalide gas (HCl or HBr, etc.) produced by halogenated flame retardants during combustion, these toxic and harmful hydrogenhalide gases cannot dissipate for a long time in the tunnel, which aggravates the difficulty of emergency rescue and personnel escape
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[0036] According to the above-mentioned raw material proportioning, prepare according to the following process:
[0037] Step 1: Heat the Zhonghai No. 70 asphalt in the asphalt storage tank to 110°C by circulating heating oil, and dehydrate it at a constant temperature for 50 minutes.
[0038] Step 2: Heat up to 170°C, stir and shear at a speed of 1000r / min, and add SBS modifier at the same time. After the SBS modifier is completely submerged in the asphalt, the stirring speed is increased to 4000r / min, and the constant temperature is sheared for...
[0065] The preparation method is the same as in Example 1.
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Abstract
The invention discloses a halogen-free environmental protectionflame-retardant asphalt for tunnel road surface, comprising asphalt, a modifier and a flame retardant, wherein the flame retardant is a halogen-free flame retardant, the weight of which is 3% to 20% of total weight of the product, and the flame retardant has the following components in percentage by weight: 50% to 75% of a nitrogen-series flame retardant, 20% to 40% of magnesiumhydrate, 3% to 10% of a coupling agent, and 0.5% to 5% of a smoke suppressant. The asphalt does not contain halogen and produce a great deal of smoke andhalogen hydride poisonous noxious gas (HCl or HBr, and the like) in combustion process, thereby buying more escape time for human, reducing the difficulty of emergency rescue work and guaranteeing the security of the lives and property to the utmost extent while improving the flame retardance of tunnel asphalt road, reducing the smoke produced with fire and delaying fire behavior.
Description
technical field [0001] The invention relates to a preparation method of an asphalt composition, in particular to a preparation method of a halogen-free environment-friendly flame-retardant asphalt for tunnel pavement. Background technique [0002] With the rapid development of expressways in our country, the number of highway tunnels is also increasing. At present, cement concrete or asphalt is generally used for pavement of most tunnel pavements in China. Compared with cement concrete pavement, asphalt concrete pavement has the characteristics of comfortable driving, low driving noise, good skid resistance and easy maintenance. Therefore, it is a trend that asphalt concrete gradually replaces cement concrete in pavement and bridge pavement. However, asphalt, as an organic mixture, is flammable under certain conditions. Once a vehicle fire occurs, the asphalt pavement will also catch fire or generate thick smoke at the same time, which invisibly increases the difficulty of...
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