Production of modified basalt fibre for heat-insulating products manufacturing

Gots, Volodymyr; MAYSTRENKO, Alla; Rogozina, N. O.; Maystrenko, A. A.

doi:10.1088/1757-899x/708/1/012082

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…An unprotected timber sample was found to be capable of igniting and spreading flames around the surface after ignition, causing the structure to collapse [1,2]. The use of heat-insulating materials makes it possible to slow down the warming of the material and to retain its functions in case of a fire for a specified period but requires considerable costs [3,4]. In addition, the temperature of separate combustive substances by far exceeds the hydrocarbon flame [5].…”

Section: Introductionmentioning

confidence: 99%

Establishing patterns of heat transfer to timber through a protective structure

Tsapko

Rogovskii

Titova

et al. 2020

EEJET

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The conducted studies of the impact of thermal action of a high-temperature magnesium flame on construction materials for timber protection from atmospheric factors revealed a pattern of temperature transfer to timber. It was proved that depending on the thermophysical properties of the material, this can lead to its ignition or slowing down the thermal conductivity process. That is why there arises the need to study the conditions for thermal conductivity and establish the mechanism for inhibition of heat transfer to timber. In this regard, a mathematical model of the process of transferring heat flow on the surface of timber when protected by coatings was developed. According to the experimental data and obtained dependences, it was established that the density of heat flow through a steel plate increases to a value of more than 200 kW/m 2 , which is sufficient for ignition of timber. Instead, the density of heat flow through a vermiculite plate did not exceed 5.2 kW/m 2 , which is not enough for its ignition. It was established that the main regulator of the heat transfer process is the heat-insulating properties of a construction product, its resistance to high temperature, because certain construction products, such as an asbestos-cement product, are destroyed under the influence of magnesium flame. That is why a significant impact on the process of protection of natural combustible material when applying the protective coating is made in the direction of heat insulation of the timber surface. This makes it possible to argue about the relevance of the detected mechanism of the formation of heat-insulating properties when it comes to the protection of storage sites of explosive products and the practical attractiveness of the proposed technological solutions. Thus, the features of inhibiting the process of transferring heat to timber during the action of the magnesium flame include heat insulation of timber surfaces by thermally resistant material.Thus, the temperature of a magnesium flame was created on the vermiculate surface, and it did not exceed 100 °C on the surface of the timber

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Section: Introductionmentioning

confidence: 99%

Establishing patterns of heat transfer to timber through a protective structure

Tsapko

Rogovskii

Titova

et al. 2020

EEJET

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“…The ecological benefits of AASC's are caused by reduction of CO 2 emission while consumption of by-products as well as waste products [13]. AASC mortars and concretes are characterized by increased strength [14], heat resistance [15,16], corrosion resistance [17], freeze-thaw resistance [18], waterproof [19] and fire resistance [20,21] in comparison with analogues based on traditional clinker cements. Beside of high performances, AASC's can be used in decorative materials [22].…”

Section: Introductionmentioning

confidence: 99%

Prevention of steel reinforcement corrosion in alkali-activated slag cement concrete mixed with seawater

et al. 2021

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Concretes mixed with seawater are characterised by enhanced performances, but action of chlorides and sulfates ensures the risk of reinforcement corrosion. Application of high consistency fresh concretes ensures changes in hardened concrete structure that causes the problem of steel reinforcement passive state ensuring. Thus mixing of plasticized concretes by seawater actualizes the search for means of steel corrosion prevention. Alkali-activated slag cements (further, AASC’s) reduce effect of ions Cl− and SO42− on steel reinforcement in concrete due to their exchange for ions OH− in the structure of zeolite-like alkaline hydroaluminosilicates. Complex additive «portland cement - calcium aluminate cement - clinoptilolite» was proposed to enhance the protective properties of AASC concretes to steel reinforcement. The results of DTA, X-ray diffraction, electron microscopy, microprobe analysis show that complex additive ensures to prevent steel reinforcement corrosion in AASC concrete mixed with seawater due to binding Cl− and SO42− ions in Kuzel’s salt in AASC hydration products and exchange of these aggressive ions with OH− ions in the structure of clinoptilolite. This effect of complex additive confirmed by surface state and the absence of mass loss of steel rebars embedded in plasticized AASC fine concrete mixed with seawater after 90 d of hardening.

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Ways to increase the production efficiency of hardwood blanks

et al. 2021

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The article presents the main results of experimental studies on the identification of the main grade defects of oak lumber by the thermal non-destructive testing method. Regressional dependences of wood defects temperature display from the main factors for the studied grade defects are proposed. Indicators of infrared radiation (temperature range) of the main visible oak grade defects obtained as a result of experimental studies are presented. A conceptual scheme for the line control methods of identification of the main grade defects in lumber are proposed.

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Production of modified basalt fibre for heat-insulating products manufacturing

Cited by 4 publications

References 2 publications

Establishing patterns of heat transfer to timber through a protective structure

Establishing patterns of heat transfer to timber through a protective structure

Prevention of steel reinforcement corrosion in alkali-activated slag cement concrete mixed with seawater

Ways to increase the production efficiency of hardwood blanks

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