DOI: https://doi.org/10.15587/1729-4061.2019.164743

Influence of testing samples' parameters on the results of evaluating the fire­protective capability of materials

Serhii Novak, Varvara Drizhd, Oleksandr Dobrostan, Larisa Maladyka

Abstract


Test methods given in EN 13381-4:2013 and EN 13381-8:2013 standards serve to assess the fire-protective capacity of materials for steel structures. The results of the tests determine data on minimum thickness of fire-protective materials used further in design of steel structures. The tests are very time consuming. They require significant costs for creation of standardized samples and conduction of tests. At the same time, there are methods, which propose to use samples of reduced sizes and of other shapes than sizes and shapes of standardized samples. There is an actual question about possibility of application of methods with samples of reduced sizes as an alternative to EN 13381-4:2013 and EN 13381-8:2013 methods.

The study investigated the convergence of results of assessment of the fire-protective capacity of two types of fire-protective materials for steel structures obtained in tests on standardized samples and tests on samples of reduced sizes. We established that values of the minimum thickness for reactive fire-protective material obtained from the test data on samples of reduced sizes are predominantly larger than values for standardized samples. Values of the minimum thickness for passive fire-protective material obtained using standardized samples are mainly large. The difference between the minimum thickness of reactive fire-protective material obtained on samples of reduced size and standardized samples reaches 79.0 %, and it is 62.5 % for a passive fire-protective material. Such difference of values indicates that it is impossible to use samples of reduced sizes for assessment of the fire-protective capacity of materials for steel structures for all ranges of reduced thickness of a steel profile, critical steel temperature and the normalized threshold of fire resistance of structures listed in EN 13381-4: 2013 and EN 13381-8: 201

Keywords


fire-protective capacity; fire-protective material; critical temperature; threshold of fire resistance; steel structure

References


EN 13381-4:2013. Test methods for determining the contribution to the fire resistance of structural members – Part 4: Applied passive protection to steel members (2013). European Committee for Standardization. Management Centre: Avenue Marnix 17, B-1000. Brussels, 83.

EN 13381-8:2013. Test methods for determining the contribution to the fire resistance of structural members – Part 8: Applied reactive protection to steel members (2013). European Committee for Standardization. Management Centre: Avenue Marnix 17, B-1000. Brussels, 80.

DSTU B V.1.1-17:2007. Vohnezakhysni pokryttia dlia budivelnykh nesuchykh metalevykh konstruktsiy. Metod vyznachennia vohnezakhysnoi zdatnosti (ENV 13381-4:2002, NEQ) (2007). Kyiv: Minrehionbud Ukrainy, 66.

DSTU-N-P B V.1.1-29:2010. Zakhyst vid pozhezhi. Vohnezakhysne obrobliannia budivelnykh konstruktsiy. Zahalni vymohy ta metody kontroliuvannia (2011). Kyiv: Minrehionbud Ukrainy, 9.

Novak, S. (2016). Parameters reasoning of samples for experimental determination of the temperature of the steel plates that are fire-retardant coating in conditions of fire exposure under standard temperature fire regime. Scientific bulletin: Сivil protection and fire safety, 2 (2), 18–24.

Novak, S., Dobrostan, O., Dolishnii, Y., Ratushnyi, O. (2017). Evaluation of convergence the results of experimental determination of duration of fire influence to achieve the critical temperature of steel. Scientific bulletin: Сivil protection and fire safety, 2, 67–72.

ETAG No. 018-2:2013. Guide for the European technical approval of fire protective products – Part 2: Reactive coatings for fire protection of steel elements.

ETAG No. 018-3:2013. Guide for the European technical approval of fire protective products – Part 3: Renderings and rendering kits intended for fire resisting applications. Available at: http://www.itb.pl/g/f/NDY1

Łukomski, M., Turkowski, P., Roszkowski, P., Papis, B. (2017). Fire Resistance of Unprotected Steel Beams – Comparison between Fire Tests and Calculation Models. Procedia Engineering, 172, 665–672. doi: https://doi.org/10.1016/j.proeng.2017.02.078

De Silva, D., Bilotta, A., Nigro, E. (2019). Experimental investigation on steel elements protected with intumescent coating. Construction and Building Materials, 205, 232–244. doi: https://doi.org/10.1016/j.conbuildmat.2019.01.223

Xu, Q., Li, G.-Q., Jiang, J., Wang, Y. C. (2018). Experimental study of the influence of topcoat on insulation performance of intumescent coatings for steel structures. Fire Safety Journal, 101, 25–38. doi: https://doi.org/10.1016/j.firesaf.2018.08.006

Wang, W.-Y., Li, G.-Q. (2009). Behavior of steel columns in a fire with partial damage to fire protection. Journal of Constructional Steel Research, 65 (6), 1392–1400. doi: https://doi.org/10.1016/j.jcsr.2009.01.004

Li, G.-Q., Han, J., Lou, G.-B., Wang, Y. C. (2016). Predicting intumescent coating protected steel temperature in fire using constant thermal conductivity. Thin-Walled Structures, 98, 177–184. doi: https://doi.org/10.1016/j.tws.2015.03.008

Novak, S., Drizhd, V., Dobrostan, O. (2018). Comparative analysis of data on the duration of fire exposure before reaching the critical temperature steel obtained for samples standardized and sample size reduction from fireproof materials "ENDOTERM 400202" and "ENDOTERM 210104". Scientific bulletin: Сivil protection and fire safety, 2 (6), 18–27. doi: https://doi.org/10.33269/nvcz.2018.2.18-27

TU U 13481691.005-2001. Sumishi dlia vohnezakhysnykh pokryttiv «Endoterm 400201», «Endoterm 400202», «Endoterm 650202», «Endoterm 250103». Tekhnichni umovy (2001). Donetskyi tsentr standartyzatsiyi, metrolohiyi ta sertyfikatsiyi, 24.

TU U 24.3-13481691-007-2003. Sumish dlia pokryttia «Endoterm 210104». Tekhnichni umovy (2003). Donetskyi tsentr standartyzatsiyi, metrolohiyi ta sertyfikatsiyi, 25.


GOST Style Citations


EN 13381-4:2013. Test methods for determining the contribution to the fire resistance of structural members – Part 4: Applied passive protection to steel members. European Committee for Standardization. Management Centre: Avenue Marnix 17, B-1000. Brussels, 2013. 83 р.

EN 13381-8:2013. Test methods for determining the contribution to the fire resistance of structural members – Part 8: Applied reactive protection to steel members. European Committee for Standardization. Management Centre: Avenue Marnix 17, B-1000. Brussels, 2013. 80 р.

DSTU B V.1.1-17:2007. Vohnezakhysni pokryttia dlia budivelnykh nesuchykh metalevykh konstruktsiy. Metod vyznachennia vohnezakhysnoi zdatnosti (ENV 13381-4:2002, NEQ). Kyiv: Minrehionbud Ukrainy, 2007. 66 p.

DSTU-N-P B V.1.1-29:2010. Zakhyst vid pozhezhi. Vohnezakhysne obrobliannia budivelnykh konstruktsiy. Zahalni vymohy ta metody kontroliuvannia. Kyiv: Minrehionbud Ukrainy, 2011. 9 p.

Novak S. Parameters reasoning of samples for experimental determination of the temperature of the steel plates that are fire-retardant coating in conditions of fire exposure under standard temperature fire regime // Scientific bulletin: Сivil protection and fire safety. 2016. Issue 2 (2). P. 18–24.

Evaluation of convergence the results of experimental determination of duration of fire influence to achieve the critical temperature of steel / Novak S., Dobrostan O., Dolishnii Y., Ratushnyi O. // Scientific bulletin: Сivil protection and fire safety. 2017. Issue 2. P. 67–72.

ETAG No. 018-2:2013. Guide for the European technical approval of fire protective products – Part 2: Reactive coatings for fire protection of steel elements.

ETAG No. 018-3:2013. Guide for the European technical approval of fire protective products – Part 3: Renderings and rendering kits intended for fire resisting applications. URL: http://www.itb.pl/g/f/NDY1

Fire Resistance of Unprotected Steel Beams – Comparison between Fire Tests and Calculation Models / Łukomski M., Turkowski P., Roszkowski P., Papis B. // Procedia Engineering. 2017. Vol. 172. P. 665–672. doi: https://doi.org/10.1016/j.proeng.2017.02.078 

De Silva D., Bilotta A., Nigro E. Experimental investigation on steel elements protected with intumescent coating // Construction and Building Materials. 2019. Vol. 205. P. 232–244. doi: https://doi.org/10.1016/j.conbuildmat.2019.01.223 

Experimental study of the influence of topcoat on insulation performance of intumescent coatings for steel structures / Xu Q., Li G.-Q., Jiang J., Wang Y. C. // Fire Safety Journal. 2018. Vol. 101. P. 25–38. doi: https://doi.org/10.1016/j.firesaf.2018.08.006 

Wang W.-Y., Li G.-Q. Behavior of steel columns in a fire with partial damage to fire protection // Journal of Constructional Steel Research. 2009. Vol. 65, Issue 6. P. 1392–1400. doi: https://doi.org/10.1016/j.jcsr.2009.01.004 

Predicting intumescent coating protected steel temperature in fire using constant thermal conductivity / Li G.-Q., Han J., Lou G.-B., Wang Y. C. // Thin-Walled Structures. 2016. Vol. 98. P. 177–184. doi: https://doi.org/10.1016/j.tws.2015.03.008 

Novak S., Drizhd V., Dobrostan O. Comparative analysis of data on the duration of fire exposure before reaching the critical temperature steel obtained for samples standardized and sample size reduction from fireproof materials "ENDOTERM 400202" and "ENDOTERM 210104" // Scientific bulletin: Сivil protection and fire safety. 2018. Issue 2 (6). P. 18–27. doi: https://doi.org/10.33269/nvcz.2018.2.18-27 

TU U 13481691.005-2001. Sumishi dlia vohnezakhysnykh pokryttiv «Endoterm 400201», «Endoterm 400202», «Endoterm 650202», «Endoterm 250103». Tekhnichni umovy. Donetskyi tsentr standartyzatsiyi, metrolohiyi ta sertyfikatsiyi, 2001. 24 p.

TU U 24.3-13481691-007-2003. Sumish dlia pokryttia «Endoterm 210104». Tekhnichni umovy. Donetskyi tsentr standartyzatsiyi, metrolohiyi ta sertyfikatsiyi, 2003. 25 p.







Copyright (c) 2019 Serhii Novak, Varvara Drizhd, Oleksandr Dobrostan, Larisa Maladyka

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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061