Influence of testing samples' parameters on the results of evaluating the fireprotective capability of materials
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 2, Issue 10
Abstract
<p>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.</p>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
Authors and Affiliations
Serhii Novak, Varvara Drizhd, Oleksandr Dobrostan, Larisa Maladyka
Keywords
Related Articles
- EP ID EP666342
- DOI 10.15587/1729-4061.2019.164743
- Views 46
- Downloads 0
Analysis of ballistic aspects in the combined method for removing space objects from the nearEarth orbits
<p>We have considered one of the ways to clean the near-Earth orbits from space debris implying the removal of large-size objects, which represent a danger to space navigation and ecology of near-earth space, in the dens...
Modeling of melting process in a single screw extruder for polymer processing
<p>We developed a mathematical model of the melting zone of a single-screw extruder for processing of polymers. The model takes into account a heat transfer of a polymer with a worm and a cylinder of an extruder (paramet...
Influence of storage duration and density of raw cotton on the mechanics of the interaction process between feeding rollers in the cleaners of large impurities
<p>We have examined influence of storage duration and the density of cotton in bale on the adhesion between impurities and cotton. We found the effect of raw cotton storage, as well as the fiber, in a compacted state, wh...
Influence of the thermal factor on the composition of electronbeam highentropy ALTiVCrNbMo coatings
<p>This paper reports results of studying the element and phase compositions of electron-beam coatings based on the high-entropy alloy AlTiVCrNbMo, depending on the deposition temperature (in the range of 300...700 °С).<...
Investigation of characteristics of double Ni–Co and ternary Ni–Co–Al layered hydroxides for supercapacitor application
Nickel hydroxides are widely used as the active material in supercapacitors. To improvise electrochemical activity, activators, namely Co and Al compounds, are introduced into the structure of nickel hydroxide. The most...