| 外墙保温材料的防火性能 |
| 添加时间：2017/8/15 17:49:30 浏览次数： |
| 在未来的建筑中将会得到更加广泛的应用。建筑是火灾事故发生的高危区，采用外墙外保温体系可以极大的降低火灾事故发生的概率，保证公众的人身财产安全。 Construction in the future will be more widely used. Architecture is a high-risk area of fire accident, the use of external thermal insulation system can greatly reduce the probability of fire accidents, ensure the person property safety of the public. 不同的外墙外保温材料类型的防火性能不同。以下是三种可供选择材料防火等级的比较分析，具体表现如下： Different types of fire prevention performance different exterior insulation materials. Here are three kinds of alternative materials fire rating of comparative analysis, specific performance is as follows: A级保温材料以真空绝热板和岩棉最为典型，真空绝热板其主要材料芯材是由二氧化硅空心微珠颗粒组成，复合阻气膜的主要组成部分是铝膜及玻纤布等组成，在25℃左右的常温条件下，导热系数保持在0.005～0.008W/(m.k)之间；岩棉本身属无机质硅酸盐纤维，在25℃左右的常温条件下，导热系数保持在0.036～0.041W/(m.k)之间，防火能力达到A级要求；发泡聚氨酯属于燃烧碳化型材料，软化温度接近120℃，目前最高可到达的防火等级是B2级；酚醛泡沫防火性能高于聚氨酯发泡，燃烧性能接近于A级材料；EPS板属于热塑性保温材料，防火等级为B2级或B1级，具备一定的优势。需要注意的是，EPS板在温度接近70～98℃时会发生软化、变形，其防火能力还可以做进一步的改善。 Class A insulation materials in vacuum and rock wool insulation board is most typical, vacuum insulation board is the main core materials composed of silica cenosphere particles, composite resistance film is the main part of aluminum film and glass fiber cloth and so on, around 25 ℃ under the condition of normal temperature, coefficient of thermal conductivity in between 0.005 ~ 0.008 W/(m.k); Rock wool itself belongs to the inorganic silicate fibre, around 25 ℃ under the condition of normal temperature, coefficient of thermal conductivity in between 0.036 ~ 0.041 W/(m.k), fire prevention ability to reach A level requirements; Foaming pu belongs to combustion type carbide material, softening temperature is close to 120 ℃, the highest accessible fire rating is B2; Phenolic foam fire prevention performance is higher than the polyurethane foam, combustion performance close to A level materials; EPS board belongs to thermoplastic insulation materials, fire rating for B2 or B1 level, have a certain advantage. It is important to note that the EPS board at temperatures close to 70 ~ 98 ℃ softening, deformation happens, its fire prevention ability can do further improvement. 新国标将27-100米民用住宅的外墙保温阻燃等级从B2级提高到了B1级，同时规定27米以下用B2级材料，27米-100米用B1级材料时，建筑外墙上门、窗的耐火完整性不能低于0.50h。也就是说，如果采用B级可燃的保温材料，建筑外墙上的门窗必须采用高性能的防火窗，且每层需设防火隔离带。 New gb will 27-100 meters civilian house of exterior wall thermal insulation flame retardant grade raised from B2 to B1 level, also stipulates that 27 meters with B2 material, 27 meters to 100 meters in B1 level material, building external wall, door window of refractory integrity cannot be less than 0.50 h. That is to say, if the class B flammable insulation materials, building doors and Windows on the wall outside must use high performance fire window, and each layer of the need for fire belt. |
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