Effect of Molar Ratios and Curing Conditions on the Moisture Resistance of Magnesium Oxychloride Cement

2022 ◽  
Vol 34 (2) ◽  
Author(s):  
Timothy A. Aiken ◽  
Mark Russell ◽  
Daniel McPolin ◽  
Brian Gavin ◽  
Liam Nugent ◽  
...  
Keyword(s):  
Moisture Resistance ◽  
Curing Conditions ◽  
Molar Ratios ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

scholarly journals Environmental Assessment of Magnesium Oxychloride Cement Samples: A Case Study in Europe

2019 ◽  
Vol 11 (24) ◽  
pp. 6957 ◽  
Author(s):  
Gediminas Kastiukas ◽  
Shaoqin Ruan ◽  
Cise Unluer ◽  
Shuang Liang ◽  
Xiangming Zhou
Keyword(s):  
Portland Cement ◽  
Environmental Impacts ◽  
Construction Material ◽  
Dry Process ◽  
Molar Ratios ◽  
Process Route ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Reactive Magnesia ◽  
Oxychloride Cement

This study is the first in the literature to systematically assess the environmental impacts of magnesium oxychloride cement (MOC) samples, which are regarded as a more eco-friendly construction material than Portland cement. The environmental impacts of MOC samples prepared with various molar ratios of MgO/MgCl2∙6H2O and sources of reactive magnesia were obtained via a life cycle assessment (LCA) approach (from cradle to grave), and the obtained outcomes were further compared with the counterparts associated with the preparation of Portland cement (PC) samples. Meanwhile, a sensitivity analysis in terms of shipping reactive magnesia from China to Europe was performed. Results indicated that the preparation of MOC samples with higher molar ratios led to more severe overall environmental impacts and greater CO2 sequestration potentials due to the difference of energies required for the production of MgO and MgCl2∙6H2O as well as their various CO2 binding capacities, whereas in terms of CO2 intensities, the molar ratios in MOC samples should be carefully selected depending on the strength requirements of the applications. Furthermore, various allocation procedures and MgO production processes will greatly influence the final outcomes, and allocation by mass is more recommended. Meanwhile, the environmental impacts associated with the transportation of reactive magnesia from China to Europe can be ignored. Finally, it can be concluded that MOC concrete is no longer a type of ‘low-carbon’ binder in comparison with PC concrete in terms of CO2 emissions, and in view of the single scores and mixing triangles for weighing, MOC concrete can only be identified as a type of more sustainable binder than PC concrete when the main component MgO in MOC samples is obtained through the dry process route rather than the wet process route.

scholarly journals Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 484
Author(s):  
Michal Lojka ◽  
Anna-Marie Lauermannová ◽  
David Sedmidubský ◽  
Milena Pavlíková ◽  
Martina Záleská ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Mechanical Resistance ◽  
Cement Composites ◽  
Multi Walled Carbon Nanotubes ◽  
The Subject ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Phase And Chemical Composition ◽  
Walled Carbon Nanotubes ◽  
Oxychloride Cement

In this contribution, composite materials based on magnesium oxychloride cement (MOC) with multi-walled carbon nanotubes (MWCNTs) used as an additive were prepared and characterized. The prepared composites contained 0.5 and 1 wt.% of MWCNTs, and these samples were compared with the pure MOC Phase 5 reference. The composites were characterized using a broad spectrum of analytical methods to determine the phase and chemical composition, morphology, and thermal behavior. In addition, the basic structural parameters, pore size distribution, mechanical strength, stiffness, and hygrothermal performance of the composites, aged 14 days, were also the subject of investigation. The MWCNT-doped composites showed high compactness, increased mechanical resistance, stiffness, and water resistance, which is crucial for their application in the construction industry and their future use in the design and development of alternative building products.

Study on corrosion and anticorrosion of rebar in magnesium oxychloride cement concrete

2019 ◽  
Vol 8 (1) ◽  
pp. 94-104 ◽  
Author(s):  
Wei Gong ◽  
Hongfa Yu ◽  
Haiyan Ma ◽  
Hongxia Qiao ◽  
Guangfeng Chen
Keyword(s):  
Cement Concrete ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

Influence of cenospheres on properties of magnesium oxychloride cement-based composites

2015 ◽  
Vol 49 (4) ◽  
pp. 1319-1326 ◽  
Author(s):  
Biwan Xu ◽  
Hongyan Ma ◽  
Chuanlin Hu ◽  
Zongjin Li
Keyword(s):  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement
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