Small Furnace Experiments for Wood Burning Pyrolysis Models

Šejna, Jakub

doi:10.19080/cerj.2021.12.555838

Cited by 2 publications

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“…The experiment consisted of four steel samples that were submitted according to a standard temperature curve for 60 min. The test was carried out in a small-scale fire furnace at University Center for Energy Efficient Buildings CTU in Prague ( Sejna, 2021). The samples had dimensions of 300 3 60 3 8 mm.…”

Section: Fire Experiments 21 Descriptionmentioning

confidence: 99%

The partial fire protection of steel members: a comparative study

Šejna

Dobrovolný

Wald

2023

JSFE

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PurposeThis paper provides a summary of the issues in the passive fire protection of steel structures. Types of passive fire protection and the material properties of protection members and steel members are described. The paper deals with the possibility of partial fire protection for secondary steel beams, in cases where, due to possible membrane action, it is not necessary to apply passive protection to the entire beams.Design/methodology/approachStudies of partially fire-protected steel structures are compared, and results from studies with different input data are summarized. A fire experiment was conducted to investigate the effect of partial passive protection in a small-scale furnace. Based on the findings of the experiment, numerical models were prepared using Ansys Mechanical.FindingsThe results are summarized, and a partial fire protection length of 500 mm is recommended. Various partial fire protection lengths were compared, and the temperature development of the steel contactors was compared using a protection length of 500 mm. At the end of the paper, options for partial passive protection of steel beams are presented.Originality/valueExtended paper from ASFE2021 based on selection.

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Section: Fire Experiments 21 Descriptionmentioning

confidence: 99%

The partial fire protection of steel members: a comparative study

Šejna

Dobrovolný

Wald

2023

JSFE

Self Cite

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“…The power setting of the burner placed in the furnace was used in accordance with previous experiments, e.g. Sejna (2021), Sejna et al (2023a, b). Before the experiment, the samples were insulated with 25 mm thick mineral wool on the sides and from the top.…”

Section: Description Of the Fire Experimentsmentioning

confidence: 99%

“…The power setting of the burner placed in the furnace was used in accordance with previous experiments, e.g. Šejna (2021), Šejna et al . (2023a, b).…”

Section: Fire Experimentsmentioning

confidence: 99%

“…The FE model was developed on the basis of knowledge acquired from previous research (Šejna, 2021) A hybrid computational mesh was chosen; for each layer, a minimum of 10 elements for steel were chosen throughout the width with set refinement during the transition between layers, and the tetrahedral element was used. A comparison of the four MESH models is shown in Table 6 and the final MESH is shown in Figure 15.…”

Section: Determining the Thermal Conductivity Of The Fire Protective ...mentioning

confidence: 99%

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Application of hybrid cement in passive fire protection of steel structures

Šejna,

Šulc,

Šmilauer

et al. 2023

JSFE

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PurposeThe aim of this paper is to determine the thermal conductivity of a protective layer of alkali-activated cement and the possibility of performing fire protection with fireclay sand and Lightweight mortar. Unprotected steel structures have generally low fire resistance and require surface protection. The design of passive protection of a steel element must consider the service life of the structure and the possible need to replace the fire protection layer. Currently, conventional passive protection options include intumescent coatings, which are subject to frequent inspection and renewal, gypsum and cement-based fire coatings and gypsum and cement board fire protection.Design/methodology/approachAlkali-activated cements provide an alternative to traditional Portland clinker-based materials for specific areas. This paper presents the properties of hybrid cement, its manufacturability for conventional mortars and the development of passive fire protection. Fire experiments were conducted with mortar with alkali-activated and fireclay sand and lightweight mortar with alkali-activated cement and expanded perlite. Fire experiment FE modelling.FindingsThe temperatures of the protected steel and the formation of cracks in the protective layer were investigated. Based on the experiments, the thermal conductivities of the two protective layers were determined. Conclusions are presented on the applicability of alkaline-activated cement mortars and the possibilities of applicability for the protection of steel structures. The functionality of the passive fire layer was confirmed and the strengths of the mortar used were determined. The use of alkali-activated cements was shown to be a suitable option for sustainable passive fire protection of steel structures.Originality/valueEco-friendly fire protection based on hybrid alkali-activated cement of steel members.

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Small Furnace Experiments for Wood Burning Pyrolysis Models

Cited by 2 publications

References 0 publications

The partial fire protection of steel members: a comparative study

The partial fire protection of steel members: a comparative study

Application of hybrid cement in passive fire protection of steel structures

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