Gomel'skogo filiala Universiteta grazhdanskoy zaschity MChS Belarusi (kafedra «Operativno-takticheskaya deyatel'nost' i tehnika», nachal'nik)
Belarus
Belarus
Belarus
Fire gaps between buildings and household out-buildings on neighboring private plots are regulated in accordance with the technical normative acts (TNA) [1] and can make from 6 to 15 m depending on build-ing levels of resistance to fire. Fire gaps don't often follow these standards because of a number of factors. One of the security techniques of inflammable struc-tures is a gel application on the construction surface which is under thermal radiation because of the near vicinity of the radiation source. By means of a mathematical apparatus it is shown that using a layer of gel liquid 1 cm thick on a surface of inflammable structures and at direct impact of the thermal flow with 10 kilowatt/m2 density on a wood sample, sample ignition happens in 280-290 seconds after the beginning of influence. In the presence of a 0,5 cm layer of gel liquid ignition occurs in 140-150 seconds after the beginning of influence of the thermal radiation. Thus, the temperature value in a layer boundary with wood depends on the thickness of composition layer. When using a composition layer on the protected constructions made of wood we may avoid any spreading of the fire in nearby structures that will lead to minimization of material losses and considerable decrease of human casualties.
thermal flow density, thermal radiation, ignition temperature, flame height, boundary conditions.
1. Technical Code of Practice TCP 45-2.02-242 "limiting the spread of fire. Fire-prevention protection of settlements and territories of the enterprises. Design building standards ".
2. Technical Code of Practice TCP 45-2.02-142-2011 "Buildings, building constructions, materials and products. Rules of fire and technical classification".
3. Technical Code of Practice TCP 45-3.01-117-2008 "Town planning. Areas of ground housing construction. №rms of planning and building".
4. STB 11.05.03-2010. Fire safety of tech№logical processes. Assessment and analysis methods of fire danger. General requirements. Minsk. Gosstandart. 2010.
5. Lykov, A.V. Theory of thremal conductivity / A.V. Lykov. - M.: Higher School, 1967. - 600 p.
6. Postolnik, Yu.S. Calculation of temperature fields of solids of main geometry under arbitrary boundary conditions / Yu.S. Postolnik, V.I. Timoshpolsky, D.N. Andria№v // Engineering and physical journal. - 2004. - Vol.77, №. 2. - P. 3-13.
