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Hygroscopic Performance of Sulphate-Based MgO Construction Boards

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Advances in Manufacturing Processes, Intelligent Methods and Systems in Production Engineering (GCMM 2021)

Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 335))

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Abstract

Magnesium oxide (MgO) construction boards are currently being used to replace fibre cement boards in various construction applications. This include usage in external claddings where reports of hygroscopic degradation were linked to presence of residual chlorides originating from the manufacturing process. The industry has responded with new products that are being marketed as Magnesium Oxysulphate (MOS) boards that are still essentially MgO based but are manufactured from non-chloride precursor. In this paper the hygroscopic performance of the new MOS based MgO is compared with some other commercially Chloride containing samples. It is shown that MOS based samples exhibited lower water absorption comparable to fibre cement boards. No evidence of chloride in the new MOS based MgO boards was found by Energy Dispersive Spectroscopy (EDS). Small angle neutron scattering (SANS), of dry samples and hydrated samples using deuterated water and normal water showed that the better hygroscopic properties of MOS based MgO board was not related to structural morphological modification and are more likely due to the absence of residual chloride in the new generation MgO boards.

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Acknowledgements

The authors acknowledge AINSE for awarding grant No. 8285 to carry out neutron diffraction studies at ANSTO.

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Authors and Affiliations

  1. University of the Sunshine Coast, Sippy Downs, QLD, 4556, Australia

    Ayodele Olofinjana, Nicholas Jays & Rezwanul Haque

  2. Charles Darwin University, Darwin, NT, 0909, Australia

    David Young

  3. Australian Centre for Neutron Scattering, Lucas Heights, NSW, 2234, Australia

    Jitendra Mata

Authors
  1. Ayodele Olofinjana
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  2. Nicholas Jays
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  3. David Young
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  4. Jitendra Mata
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  5. Rezwanul Haque
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Corresponding author

Correspondence to Ayodele Olofinjana .

Editor information

Editors and Affiliations

  1. Liverpool John Moores University, Liverpool, UK

    Andre Batako

  2. Wroclaw University of Science and Technology, Wrocław, Poland

    Anna Burduk

  3. School of Civil Engineering and Built Environment, Liverpool John Moores University, Liverpool, UK

    Kanisius Karyono

  4. General Engineering Research Institute, Liverpool John Moores University, Liverpool, UK

    Xun Chen

  5. Faculty of Mechanical Engineering, Silesian University of Technology, Gliwice, Poland

    Ryszard Wyczółkowski

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Olofinjana, A., Jays, N., Young, D., Mata, J., Haque, R. (2022). Hygroscopic Performance of Sulphate-Based MgO Construction Boards. In: Batako, A., Burduk, A., Karyono, K., Chen, X., Wyczółkowski, R. (eds) Advances in Manufacturing Processes, Intelligent Methods and Systems in Production Engineering. GCMM 2021. Lecture Notes in Networks and Systems, vol 335. Springer, Cham. https://doi.org/10.1007/978-3-030-90532-3_30

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