Determination of thermal and physical characteristics of dead pine wood thermal insulation products

Tsapko, Yuriy; Zavialov, Denys; Bondarenko, Olga; Marchenco, Nataliia; Mazurchuk, Serhiy; Horbachova, Oleksandra

doi:10.15587/1729-4061.2019.175346

Cited by 16 publications

(11 citation statements)

References 13 publications

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“…The results of studies to determine the maximum temperature and duration of the induction time of temperature transfer through the wood layer were performed in accordance with [16], the results are shown in Fig. 5.…”

Section: Results Of Determining the Wood Sample Surface Temperature Umentioning

confidence: 94%

“…According to the temperature measurements obtained during the tests (Fig. 7), the thermophysical properties of coked foam were calculated using the obtained dependences (11) and (16). Thus, the volumetric heat capacity of the coked foam layer was 17.114 kJ/(m 3 •K), and the thermal conductivity coefficient was 0.36 W/(m•K), respectively.…”

Section: Results Of Determining the Wood Sample Surface Temperature Umentioning

confidence: 99%

“…Determination of thermophysical characteristics of untreated wood was carried out according to the method described in [16].…”

Section: Methods For Determining the Burnout Rate Of Woodmentioning

confidence: 99%

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Determination of regularities of heat resistance under flame action on wood wall with fire-retardant varnish

Tsapko

Lomaha

Tsapko

et al. 2020

EEJET

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An analysis of fire-retardant materials for wooden building structures is carried out and the need to develop reliable methods for studying the process of ignition and flame propagation on the surface of a building structure, necessary for creating new types of fire-retardant materials, is found. Therefore, it is necessary to determine the conditions for forming a thermal conductivity barrier and find a mechanism for inhibiting heat transfer to the material. In this regard, a computational and analytical method for determining thermal conductivity when using a fire-retardant varnish as a coating is developed, which allows assessing the coefficient of thermal conductivity under high temperature action. According to experimental data and theoretical dependences, the coefficient of thermal conductivity of the fire-retardant coked foam layer of 0.36 W/(m•K) is calculated, which, accordingly, ensures the heat resistance of wood. As a result of research, it is proved that the process of heat insulation of a wooden structure consists in the formation of sootlike products on the surface of natural combustible material. This made it possible to determine the conditions for fireproofing wood by forming a thermal conductivity barrier during the decomposition of varnish into foamed coke. Experimental studies confirmed that a sample of fireproof wood withstood the temperature effect of the heat flux for 900 s. The maximum possible temperature penetration through the coating is evaluated. It is found that under the temperature effect on the sample, which significantly exceeds the ignition temperature of wood, on the unheated surface of the sample, this value did not exceed 180 °C. Thus, there is reason to assert the possibility of directional regulation of wood fire protection processes using fire-retardant coatings that can form a protective layer on the material surface that inhibits wood burnout

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Section: Results Of Determining the Wood Sample Surface Temperature Umentioning

confidence: 94%

Section: Results Of Determining the Wood Sample Surface Temperature Umentioning

confidence: 99%

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Determination of regularities of heat resistance under flame action on wood wall with fire-retardant varnish

Tsapko

Lomaha

Tsapko

et al. 2020

EEJET

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“…Modern fire-extinguishing substances include water-based fire-ex-tinguishing substances, in particular foaming agents, which are used to a greater or lesser extent in the practice of fire extinguishing. At the same time, the factors that predetermine the effect of foaming agents include the cooling and insulating of the flammable environment [4].…”

Section: Introductionmentioning

confidence: 99%

Establishing regularities in the insulating capacity of a foaming agent for localizing flammable liquids

Tsapko¹,

Rogovskii²,

Titova³

et al. 2020

EEJET

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“…До стінових панелей висувають також вимоги щодо звуко-та теплоізоляції. Проведені дослідження (Tsapko, Zavialov, Bondarenko, Pinchevska, Marchenko, & Huziy, 2019;Tsapko, Zavialov, Bondarenko, Marchenko, Mazurchuk, & Horbachova, 2019) дали Рис. 1.…”

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Properties of new thermal insulation material from low-quality pine wood

Pinchevska¹,

Zavialov²

2020

Ukr. j. for. wood sci.

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Recently growing number of low quality wood in Ukraine, damaged by fungal sap color, stem rot leads to finding ways to use it. Today this wood is used mainly for the manufacture of wood-fuels facility in industrial and municipal energy. A possible way to use it is making insulation material from wood wool. The existing prototype of such material - fibrolite contains woody wool of healthy wood but during burning emits toxic chemicals. The construction of wooden wall panels, which include a frame of lumber and thermal insulation material of wood wool, made of low quality pine wood and binder. The binder used were inorganic (liquid glass) and organic-mineral (PVA) dispersion with the addition of flame retardant. Investigation of fire resistance, acoustic and thermal insulation of material from low quality pine wood have proved that it meets the regulatory requirements and can be used in building structures. To develop technological requirements for the manufacture of wall panels using low-quality pine wood, it is necessary to determine their density, sorption capacity and bio-stability. For this purpose, samples of thermal insulation material with different content of mass parts of wood wool and binder were made. The density of specimens of insulating material (145‒250 kg/m3), which is close to the popular hard thermal insulation materials, has been determined. Experimental studies of moisture absorption, sorption capacity and swelling values indicated that the effect of moisture on the properties of insulating material and its shape resistance are within the permissible values of regulatory documents for construction products. Wood treated with binders found to be used for the manufacture of insulation material has been found to have high biological resistance, which is more than 5-6 times the bio-resistance of untreated wood.

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Determination of thermal and physical characteristics of dead pine wood thermal insulation products

Cited by 16 publications

References 13 publications

Determination of regularities of heat resistance under flame action on wood wall with fire-retardant varnish

Determination of regularities of heat resistance under flame action on wood wall with fire-retardant varnish

Establishing regularities in the insulating capacity of a foaming agent for localizing flammable liquids

Properties of new thermal insulation material from low-quality pine wood

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