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Title: FLUOROGRAPHENE-DOPED MAGNESIUM OXYCHLORIDE CEMENT COMPOSITES FOR CONSTRUCTION
FLUOROGRAPHENE-DOPED MAGNESIUM OXYCHLORIDE CEMENT COMPOSITES FOR CONSTRUCTION

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Martina Zaleska; Milena Pavlikova; Adam Pivak; Zbysek Pavlik; Ondrej Jankovsky;
10.5593/sgem2024/6.1/s26.36
10.5593/sgem2024/6.1
1314-2704
978-619-7603-74-3
English
24
6.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Green Buildings Technologies and Materials
In addition to excellent mechanical, physical and chemical parameters, magnesium oxychloride cement (MOC) composites offer numerous environmental benefits, particularly with regard to the necessary reduction of carbon dioxide emissions associated with the production of Portland cement based building materials. However, the limitation to the wider use of MOC is its low water resistance. Therefore, the possibility of improving the water resistance of magnesium oxychloride cement (MOC) composites by nano-adjustment using fluorographene (FG) was the subject of the research presented. A tannic acid (TA)-based surfactant was used to uniformly disperse the FG particles. The effect of FG added at the dosage of 0.2% and 0.5% by weight of the MOC binder in the MOC mixture was investigated and characterized by the assessment of the mechanical, basic structural and microstructural properties of the hardened composites. Particular attention was paid to the analysis of water resistance, for which the hygric parameters and the softening coefficient were measured after immersing the samples in water for 24 hours.
The results obtained showed that FG in the amount of 0.2 wt% of the binder improved the water resistance, while 0.5 wt% of FG in the MOC binder gave results comparable to those of the reference sample. Since FG-doped MOC composites retained the excellent mechanical and structural parameters of MOC, the improvement in water resistance may enable them to more widely exploit their advanced properties and eco-efficiency in construction practice.
[1] Regulation (EU) 2021/1119 of the European Parliament and of the Council of 30 June 2021 establishing the framework for achieving climate neutrality and amending Regulations (EC) No 401/2009 and (EU) 2018/1999 (‘European Climate Law’).
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[5] Guan B., He Z., Wei F., Wang F., Yu J., Effects of fly ash and hexadecyltrimethoxysilane on the compressive properties and water resistance of magnesium oxychloride cement, Polymers, vol. 15, 172, 2023.
[6] Lauermannova A.-M., Jankovsky O., Sedmidubsky D., Lojka M., Pavlikova M., Pivak A., Zaleska M., Pavlik Z., Case study on MOC composites enriched by foamed glass and ground glass waste: Experimental assessment of material properties and performance, Case Studies in Construction Materials, vol. 18, e01836, 2023.
[7] Zhu Y., Li W., Liu W., Yang L., Wang L., A new approach to improving the water resistance of MOC-solidified sludge using HCO3- ions, Construction and Building Materials, vol. 401, 132959, 2023.
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[9] Lauermannova A.-M., Jirickova A., Sedmidubsky D., Pavlikova M., Zaleska M., Pivak A., Pavlik Z., Jankovsky O., Graphene- and MWCNT-reinforced magnesium oxychloride composite modified by tannic acid, FlatChem, vol. 37, 100459, 2023.
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[12] EN 1015-10 Methods of Test for Mortar for Masonry - Part 10: Determination of Dry Bulk Density of Hardened Mortar, CEN, 1999.
[13] EN 1015-11 Methods of Test for Mortar for Masonry - Part 11: Determination of Flexural and Compressive Strength of Hardened Mortar, CEN, 2019.
[14] EN 13755 Natural stone test methods - Determination of water absorption at atmospheric pressure, CEN, 2008.
The research was supported by Czech Science Foundation Grant No. 23-05194M - High-strength and water-resistant MOC composites with secondary fillers: contribution of 2D carbon-based nanomaterials and their combinations. The research conducted at CTU Prague was financed by the Grant Agency of the Czech Technical University in Prague, under project No. SGS23/OHK1/3T-002/23 - Research and development of high performance building composites.
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https://doi.org/10.5593/sgem2024/6.1/s26.36
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Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024
24th International Multidisciplinary Scientific GeoConference SGEM 2024, 1 - 7 July, 2024
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
247-254
1 - 7 July, 2024
website
9804
magnesium oxychloride cement, fluorographene, construction industry, water resistance

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