Sakkas Konstantinos, Sofianos Alexandros, Nomikos Pavlos, Panias Dimitrios
Laboratory of Tunnelling, School of Mining and Metallurgical Engineering, National Technical University of Athens, 9 Iroon Polytechneiou St, Zografou, Athens 15780, Greece.
Laboratory of Metallurgy, School of Mining and Metallurgical Engineering, National Technical University of Athens, 9 Iroon Polytechneiou St, Zografou, Athens 15780, Greece.
Materials (Basel). 2015 Sep 11;8(9):6096-6104. doi: 10.3390/ma8095294.
The performance of a fire resistant coating for tunnel passive fire protection under successive severe thermal loading is presented. The material falls under the class of potassium based geopolymers (K-geopolymer) and was prepared by mixing ferronickel (FeNi) slag, doped with pure alumina, with a highly alkaline potassium hydroxide aqueous phase. Its performance was assessed by subjecting a concrete slab with a five cm thick K-geopolymer coating layer into successive RijksWaterStaat (RWS) fire incidents. During the first test, the maximum measured temperature in the K-geopolymer/concrete interface was 250 °C, which is 130 °C lower than the RWS test requirement, while, during the second fire test, the maximum temperature was almost 370 °C, which is still lower than the RWS requirement proving the effectiveness of the material as a thermal barrier. In addition, the material retained its structural integrity, during and after the two tests, without showing any mechanical or thermal damages.
介绍了一种用于隧道被动防火的防火涂层在连续严重热负荷下的性能。该材料属于钾基地质聚合物（K-地质聚合物）类别，通过将掺杂纯氧化铝的镍铁（FeNi）矿渣与高碱性氢氧化钾水相混合制备而成。通过使具有5厘米厚K-地质聚合物涂层的混凝土板经历连续的荷兰公共工程和水利管理局（RWS）火灾事故来评估其性能。在第一次测试中，K-地质聚合物/混凝土界面处测得的最高温度为250°C，比RWS测试要求低130°C，而在第二次火灾测试中，最高温度几乎为370°C，仍低于RWS要求，证明了该材料作为热障的有效性。此外，该材料在两次测试期间和之后都保持了其结构完整性，没有出现任何机械或热损伤。
