预制夹芯保温墙体板缝抗火性能试验研究

Experimental research on fire-resistance behavior of precast sandwich insulation wall panel joints

按照国家标准《塑料燃烧性能的测定水平法和垂直法》(GB/T 2408—2008)的有关试验方法,采用本生灯对预制夹芯保温墙体的3种板缝构造(无填充材料、填充PE棒泡沫条以及填充岩棉条)的抗火性能进行了试验研究。研究表明:无填充材料的板缝受火30min时(火焰最高温度957℃),内、外叶墙中FRP连接件的最高温度分别为132℃和97℃,超过了FRP连接件的玻璃化温度(实测玻璃化温度93℃),此时挤塑聚苯板(XPS)材料受火剧烈燃烧、熔融,这表明无填充材料的板缝构造抗火性能较差,不能满足抗火安全性要求;在受火60min情况下,火焰最高温度为970℃左右,对于填充PE棒泡沫条和岩棉条的两种板缝构造而言,其中的FRP连接件均保持完好,填充PE棒泡沫条在内、外叶墙中最高温度分别为78℃和42℃,填充岩棉条的板缝连接件在内、外叶墙中最高温度分别为47℃和36℃,此时两种板缝的XPS材料无火焰和滴落物产生,可见填充岩棉条或PE棒泡沫条的板缝构造具有较好的抗火安全性,可以在工程中推广应用。

According to the test methods of the national standard Plastics—Determination of burning characteristics—Horizontal and vertical test（GB/T 2408—2008）,experimental research on fire-resistance behavior for three kinds of wall panel joints about the precast sandwich insulation wall panels（including no filler material wall panel joint,filling PE foam wall panel joint and filling rock wool wall panel joint） were done using the Bunsen burner.The results indicate that when no filler material wall panel joint was fired 30 minutes（the maximum flame temperature is 957℃）,the highest temperature of FRP connector is 132℃ in internal wall panel and 97℃ in the external wall panel,respectively.It exceeds the glass transition temperature 93℃ of the FRP material.The XPS material burnt strongly and melting at this moment.It proves that fire-resistance behavior of no filler material wall panel joint is poorer,and can not satisfy the requirement of fire safety.After fired 60 minutes,the highest flame temperature is about 970℃.The FRP connectors are remain intact for filling PE foam wall panel joint and filling rock wool wall panel joint.The highest temperature of filling PE foam wall panel joint is 78℃ in the internal wall panel and 42℃ in the external wall panel,respectively.The highest temperature of filling rock wool wall panel joint is 47℃ in the internal wall panel and 36℃ in the external wall panel,respectively.The XPS material for the two kinds of wall panel joints does not produce flame or drop things at this moment.It shows that wall panel joints filled with PE foam or filled with rock wool have good fire-resistance behavior,and are applicable in the practical projects.