Drozdzol Krzysztof
Faculty of Civil Engineering and Architecture, Opole University of Technology, Katowicka 48 Street, 45-758 Opole, Poland.
Materials (Basel). 2021 Apr 16;14(8):2011. doi: 10.3390/ma14082011.
Chimneys are structures designed to convey exhaust gases from heating devices to the outside of buildings. The materials from which they are made have a great impact on their fire safety, as well as on the safety of the whole building. As current trends in the construction industry are moving towards improving the environmental impact and fire safety, changes to building materials are constantly being introduced. This also applies to the development of chimney technology, as there is still a recognised need for new solutions when it comes to materials used in the production of chimney systems. This article presents the findings of tests carried out on a chimney made from innovative perlite concrete blocks. Four different perlite concrete blocks that differed in bulk densities were analysed. The obtained results were then compared with widely used leca (lightweight expanded clay aggregate) concrete blocks. The test results confirmed high insulation properties of the perlite concrete block, from which the innovative chimney casing was made. The fire safety level was maintained even in high temperatures that occur during soot fire (1000 °C). These properties were retained despite there being no additional insulation of the flue duct. Even though the thermal load decreased the compressive strength of the chimney blocks, they still displayed sufficient average strength of 4.03 MPa. Additionally, the test results confirmed the possibility of recovering heat from the chimney with the efficiency of 23-30%, which constitutes a considerable increase compared to chimneys made from leca concrete blocks.
烟囱是一种将加热设备产生的废气输送到建筑物外部的结构。其制作材料对自身及整个建筑物的消防安全都有重大影响。随着建筑行业当前的趋势朝着改善环境影响和消防安全发展，建筑材料不断推陈出新。这同样适用于烟囱技术的发展，因为在烟囱系统生产所用材料方面，仍然存在对新解决方案的需求。本文介绍了对由创新型珍珠岩混凝土砌块制成的烟囱进行测试的结果。分析了四种不同堆积密度的珍珠岩混凝土砌块。然后将所得结果与广泛使用的陶粒（轻质膨胀粘土集料）混凝土砌块进行比较。测试结果证实了用于制作创新型烟囱外壳的珍珠岩混凝土砌块具有高保温性能。即使在积灰火灾期间出现的高温（1000℃）下，消防安全水平仍得以维持。尽管烟道没有额外的隔热措施，但这些性能依然得以保持。尽管热负荷降低了烟囱砌块的抗压强度，但它们仍显示出足够的平均强度，为4.03兆帕。此外，测试结果证实了从烟囱回收热量的可能性，效率为23%至30%，与由陶粒混凝土砌块制成的烟囱相比，这有了相当大的提高。
