Comparative analysis on thermal performance of MgO and fiber cement boards applied to light steel frame building systems

Martins, Juliana Arrobas; Gomes, Carlos Eduardo Marmorato; Fontanini, Patrícia Stella Pucharelli; Dornelles, Kelen Almeida

doi:10.1016/j.jobe.2018.10.017

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Consequently, magnesium oxychloride boards have many advantages when compared with traditional board types such as plywood, gypsum plasterboard, fibre-cement and oriented strand board (OSB). For example, they are less dense than fibre-cement boards making handling easier for construction workers and reducing loads on buildings [27]. Additionally, cutting magnesium oxychloride boards does not require sophisticated or expensive equipment, a simple 'score and snap' method can be applied which requires only a knife.…”

Section: Introductionmentioning

confidence: 99%

Magnesium oxychloride boards: understanding a novel building material

et al. 2020

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Magnesium oxide type building boards are a relatively new alternative to traditional sheeting materials such as plywood, gypsum plasterboard and fibre-cement board. They have many advantages; strength, lightweight, ease of use and excellent fire resistance, which has become increasingly important as demanded by industry and required by more stringent legislation. Recently cases of durability issues associated with magnesium oxychloride boards in Denmark have emerged, however the precise nature of the problem was not established. These issues have been related to magnesium oxychloride boards which were exposed to high levels of moisture. In this paper the mechanism of the failures observed in Denmark has been investigated. The difference in quality between various magnesium oxychloride boards available in the market was also studied. It was found that there are significant differences, both physically and chemically, between magnesium oxychloride boards supplied from different manufacturers. Crucially, the performance of each board when exposed to high levels of relative humidity was vastly different. Some of the boards investigated displayed behaviour similar to that observed in Denmark, whilst other boards exhibited substantial resistance to humid environments and had not deteriorated after 60 weeks of exposure.

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Section: Introductionmentioning

confidence: 99%

Magnesium oxychloride boards: understanding a novel building material

et al. 2020

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“…Although the boards have an advantage over GB and OSB panels in terms of acoustic properties, the authors concluded that the main disadvantage of this type of boards is that they have a very high mass loss at elevated temperatures, about 15% higher compared to GBs. These results were later confirmed by Steau et al [38] and Martins et al [55]. Therefore, under the high thermal load, cracks occur in the board and the integrity of the whole assembly is compromised.…”

Section: Sheathing Boards and Finishing Layersmentioning

confidence: 60%

Development of Lightweight Steel Framed Construction Systems for Nearly-Zero Energy Buildings

et al. 2022

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Light steel frame (LSF) building systems offer high structural resilience, lower costs due to fast prefabrication, and high ability to recycle and reuse. The main goal of this paper was to provide state-of-the-art main components for such systems with the intention to be implemented for use in nearly-zero energy buildings (NZEBs). A brief historical outline of the development of LSF systems was given, and the key parameters affecting the design and use of LSF systems were discussed. The influence of the individual components of the LSF system (steel studs, sheathing boards, and insulation materials) was then thoroughly discussed in light of relevant research on energy efficiency and other important properties (such as sound protection and fire resistance). Web of Science and Scopus databases were used for this purpose, using relevant key words: LSF, energy efficiency, sheathing boards, steel studs, insulation, etc. Several research gaps were identified that could be used for development and future research on new LSF systems. Finally, based on the analysis of each component, an innovative LSF composite wall panel was proposed which will be the subject of the authors’ future research. Conducted preliminary analysis showed low thermal transmittance of the system and indicates the path of its further research.

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“…Fiber cement boards are used as external wallboards because of their moisture resistance, toughness, ductility, and crack resistance. 42 Further, they have a lower mass loss at elevated temperatures (around 22% at 800 C), as reported in Jays et al 39 Figure 10A shows the specific heat variation of fiber cement Figure 10B shows the mass retention vs temperature curve for fiber cement board, where a total mass loss of 18% is observed at 1200 C. Figure 10C shows the thermal conductivity variation of fiber cement board with an initial value of 0.28 W/m C and a gradual reduction to 0.19 W/m C at 460 C with fluctuations. These thermal conductivity results are at least 20% higher at the beginning and 35% higher at the end than that of gypsum plasterboard.…”

Section: Fiber Cement Boardmentioning

confidence: 99%

Elevated temperature thermal properties of advanced materials used in LSF systems

2021

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Lightweight cold-formed steel (CFS) construction solutions are increasingly adopted in low and mid-rise buildings. Many different materials are used to construct CFS wall systems, without a full understanding of their thermal properties. For many of these materials, only ambient temperature thermal properties are available from their manufacturers. This creates difficulty in classifying the materials for use at elevated temperatures. In this study, a series of elevated temperature thermal property tests to measure specific heat, thermal conductivity, and mass loss was conducted for a range building materials from wallboards, insulation, and phase-change materials (PCMs), used in Australia and several other countries. Simultaneous Thermal Analyser and Laser Flash Apparatus were used to determine the elevated temperature thermal properties of the selected materials, gypsum plasterboard, PCM incorporated gypsum plasterboard, magnesium sulphate board, fibre cement board, cellulose insulation, vacuum insulation panel, microencapsulated paraffin PCM, and bio-based PCM. Their elevated temperature thermal properties are presented in this article, which also includes analyses of their chemical composition and associated chemical reactions at elevated temperatures. These results can be used in the selection of suitable energyefficient and fire-resistive materials, and in heat transfer modeling to identify wall configurations with increased fire resistance and energy efficiency.

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Comparative analysis on thermal performance of MgO and fiber cement boards applied to light steel frame building systems

Cited by 14 publications

References 6 publications

Magnesium oxychloride boards: understanding a novel building material

Magnesium oxychloride boards: understanding a novel building material

Development of Lightweight Steel Framed Construction Systems for Nearly-Zero Energy Buildings

Elevated temperature thermal properties of advanced materials used in LSF systems

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