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景观膜结构建筑怎么做防火处理?
来源:http://www.sdcscp.com/ 发布时间:2022-04-25
小型景观膜结构建筑无需考虑消防防火设计,但大型公共膜结构建筑必须明确防火设计思想。膜结构建筑消防应以耐火和安全综合特性进行设计,而不应按照传统抗火耐火进行设计。膜结构材料面的选择应满足室内火荷载和使用功能的要求以及能够抵抗外部火源危害的要求。必要时可在膜结构建筑面内侧附加一层不燃膜以在膜结构室内起火时保护外侧受力膜,从而满足防火要求,同时也可提高膜结构建筑室内保温。
Small landscape membrane structure buildings do not need to consider fire protection design, but large public membrane structure buildings must clarify the fire protection design idea. The fire protection of membrane structure buildings should be designed based on the comprehensive characteristics of fire resistance and safety, rather than the traditional fire resistance and fire resistance. The selection of membrane structure material surface shall meet the requirements of indoor fire load and use function, as well as the requirements of being able to resist the hazards of external fire sources. If necessary, a layer of incombustible membrane can be added on the inner side of the membrane structure building surface to protect the outer stressed membrane in case of fire in the membrane structure room, so as to meet the fire prevention requirements and improve the indoor thermal insulation of the membrane structure building.
1.催化剂
1. Catalyst
催化剂是一种能在一定条件下分解出磷酸的物质,分解出的酸使多元醇脱水,从而使之形成不易燃的三维空间结构的炭化层。通常,磷酸三聚氰胺的水溶性较聚磷酸胺小,且兼具催化和发泡双重功效,目前主要选用磷酸三聚氰胺为催化剂。
Catalyst is a substance that can decompose phosphoric acid under certain conditions. The decomposed acid dehydrates the polyol, so as to form a non flammable carbonization layer with three-dimensional spatial structure. Generally, the water solubility of melamine phosphate is smaller than that of amine polyphosphate, and it has the dual effects of catalysis and foaming. At present, melamine phosphate is mainly used as the catalyst.
2.成碳剂
2. Carbon forming agent
成碳剂是涂层在高温下形成不易燃三维空间结构的泡沫碳化层的物质基础,对泡沫炭化层起骨架作用。成碳剂在分解温度上要和催化剂相匹配,当采用聚磷酸胺作催化剂时就应用热稳定性高的含高碳多羟基化合物作成碳剂。但其缺点是施工时气味大、涂层易老化,淀粉等。使用淀粉做成碳剂,涂层的耐水性问题不易解决,而二季戊四醇由于其价格原因,在国内也很少使用,目前国内普遍采用季戊四醇作为防火涂料的成碳剂。
膜结构车棚
Carbon forming agent is the material basis for forming a non carbonated three-dimensional foam foam carbonization layer at high temperature, and plays a skeleton role in the carbonization layer of the foam. The decomposition temperature of the carbon forming agent should match that of the catalyst. When polyphosphate amine is used as the catalyst, the high carbon containing polyhydroxy compound with high thermal stability is used as the carbon forming agent. However, its disadvantages are strong smell during construction, easy aging of coating, starch, etc. When starch is used as carbon agent, the problem of water resistance of the coating is not easy to solve, and dipentaerythritol is rarely used in China due to its price. At present, pentaerythritol is widely used as carbon forming agent of fire retardant coating in China.
3.发泡剂
3. Foaming agent
膨胀型防火涂料只有在发泡剂的作用下,才能在高温火焰下产生膨胀层。发泡剂遇火分解并释放出氨、水、二氧化碳、卤化氢等不燃性气体,使涂层在到达软化点的情况下发泡膨胀,形成海绵状结构。
The intumescent fire retardant coating can produce an intumescent layer under high temperature flame only under the action of foaming agent. The foaming agent decomposes in case of fire and releases non combustible gases such as ammonia, water, carbon dioxide and hydrogen halide, which makes the coating foam and expand when reaching the softening point to form a sponge structure.
以上就是今天小编带给大家的精彩内容,更多精彩内容请点击我们的网站:膜结构景观http://www.sdcscp.com
The above is the wonderful content that Xiaobian brings to you today. For more wonderful content, please click our website: membrane structure landscape http://www.sdcscp.com
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