Material properties of clay and lime plaster for structural fire design

Liblik, Johanna; Küppers, Judith; Just, Alar; Maaten, Birgit; Pajusaar, Siim

doi:10.1002/fam.2798

Cited by 6 publications

(4 citation statements)

References 6 publications

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Section: Determination Of the Optimal Density Of The Plaster Compositionmentioning

confidence: 99%

“…It is known that the fire retardant properties of plaster compositions are affected by the density and coefficients of heat capacity and thermal conductivity, depending on the temperature and the nature of the binder and filler of the plaster [46]. To determine the density at which the greatest fire resistance is provided, the temperature curves of clay and lime plaster compositions obtained by fire testing under the standard temperature regime were analyzed [26] (Figure 15). As seen in Figure 15, the graphs for the samples with clay and lime plasters with high density (1610-1800 kg/m 3 ) grow at a higher rate, demonstrating low fire resistance limits compared to the samples with coatings studied in this work, and a lower density (220 to 775 kg/m 3 ).…”

Section: Determination Of the Optimal Density Of The Plaster Compositionmentioning

confidence: 99%

“…In [26], tests of high-density clay and lime plaster compositions applied to wooden structures are demonstrated to determine their thermal properties under standard temperature regime. Experimental studies are confirmed by numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Characteristics of Fireproof Plaster Compositions in Exposure to Various Regimes of Fire

et al. 2022

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The problems of the fire safety of oil and gas facilities are particularly relevant due to the increasing complexity of technological processes and production. Experimental studies of steel structures with three different types of plasters are presented to determine the time taken to reach the critical temperature and loss of bearing capacity (R) of the sample, as a result of reaching a rate of deformation growth of more than 10 mm/min and the appearance of the ultimate vertical deformation. The simulation of the heating of steel structures showed a good correlation with the results of the experiment. The consumption of the plaster composition for the steel column was predicted, which allowed a 38% reduction in the consumption of fireproofing. It was found that to obtain the required fire resistance limit, it is necessary to consider the fire regime and apply plaster compositions with a thickness of 30–35 mm, depending on their thermal characteristics. The dependence of thermal conductivity and temperature on density is obtained, showing that the use of plaster compositions with a density of 200 to 600 kg/m3 is optimal to ensure a higher fire resistance limit. It is shown that the values of thermal conductivity of plaster compositions at 1000 °C are higher by 8–10% if the structure is exposed to a hydrocarbon fire regime. It is shown that the values of the heat capacity of plaster compositions at 1000 °C are higher by 10–15% if the structure is exposed to a standard fire regime.

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Section: Determination Of the Optimal Density Of The Plaster Compositionmentioning

confidence: 99%

Section: Determination Of the Optimal Density Of The Plaster Compositionmentioning

confidence: 99%

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Thermal Characteristics of Fireproof Plaster Compositions in Exposure to Various Regimes of Fire

et al. 2022

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“…The second method of fire protection of metal structures includes plaster compositions with a thickness of 10-60 mm, used in dry rooms (at a relative air humidity of less than 65%), applied on a steel grid and used to increase the fire resistance limit of metal structures up to 2 and more hours. In [15], experiments concerning clay and lime plaster compositions with a high density applied to wooden structures were demonstrated to determine their thermophysical properties under standard temperature conditions. Experimental studies are confirmed by numerical simulation, and the low fire protection efficiency of clay and lime plaster was shown.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characteristics of Epoxy Fire-Retardant Coatings under Different Fire Regimes

Gravit,

Shabunina,

Shcheglov

2023

Fire

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Different systems of fire protection coatings are used to protect the metal structures of stories and trestles at oil and gas facilities from low (when filling cryogenic liquids) and high temperatures (in case of the possible development of a hydrocarbon fire regime). This paper presents the results of experiments of fireproof coatings on an epoxy binder after the simulation of a liquefied hydrocarbons spill and subsequent development of a hydrocarbon fire regime at the object of protection and exposure of structures to a standard fire regime. According to the experimental results, the temperatures on the samples at the end of the cryogenic exposure were determined and the time from the beginning of the thermal exposure to the limit state of the samples at a hydrocarbon and standard temperature fire regime was determined. As a result, temperature–time curves in the hydrocarbon and standard fire regimes were obtained, showing good convergence with the simulation results. The solution of the inverse task of heat conduction using finite element modeling made it possible to determine the thermophysical properties of the formed foam coke at the end of the fire tests of steel structures with intumescent coatings. It was determined that an average of 12 mm of intumescent coating thickness is required to achieve a fire protection efficiency of 120 min and for the expected impact of the hydrocarbon fire regime, the coating consumption should be increased by 1.5–2 times compared to the coating consumption for the standard regime.

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Investigation of debinding sintering strategy and analysis of different structure properties of printed ceramic clay materials based on liquid deposition molding technology

Chen,

Xiao,

Liu

et al. 2024

Discov Appl Sci

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The emergence of additive manufacturing (AM) technology for ceramic clay materials has greatly impacted the traditional pottery manufacturing industry. However, there are still limitations in post-processing and structural design for ceramic clay materials in the current field. To address these challenges, in this study, we first used orthogonal experiments to investigate the impact of the heating rate during debinding, the final sintering point, and the insulation time at the sintering point on the performance of the fabricated parts. It was further concluded that the optimal debinding sintering strategy consisted of a debinding heating rate of 0.5 °C/min, a final sintering point of 1300 °C, and a sintering point insulation time of 3 h. Under these conditions, the compressive strength of the specimens reached a maximum of 38.75 ± 4.57 MPa. Herein, we accomplished the printing of two different structures based on liquid deposition molding (LDM) technology. Through comparative analysis of the experimental results, the research solved the buckling phenomenon of flexural specimens and concluded that the octet structure exhibited superior performance. Additionally, we successfully prepared various pottery specimens, further demonstrating this study's application prospects.

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Material properties of clay and lime plaster for structural fire design

Cited by 6 publications

References 6 publications

Thermal Characteristics of Fireproof Plaster Compositions in Exposure to Various Regimes of Fire

Thermal Characteristics of Fireproof Plaster Compositions in Exposure to Various Regimes of Fire

Thermal Characteristics of Epoxy Fire-Retardant Coatings under Different Fire Regimes

Investigation of debinding sintering strategy and analysis of different structure properties of printed ceramic clay materials based on liquid deposition molding technology

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