Carbon Dioxide Uptake by MOC-Based Materials

Jankovský, Ondřej; Lojka, Michal; Lauermannová, Anna-Marie; Antončík, Filip; Pavlíková, Milena; Pavlík, Zbyšek; Sedmidubský, David

doi:10.3390/app10072254

Cited by 51 publications

(13 citation statements)

References 46 publications

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“…All elemental maps are displayed in Figure 7. Relatively higher carbon content was detected, most probably due to the surface reaction with carbon dioxide forming chlorartinite [34]. The phase composition of the 14-day samples was analyzed using XRD.…”

Section: Resultsmentioning

confidence: 99%

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MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

et al. 2021

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The ongoing tendency to create environmentally friendly building materials is nowadays connected with the use of reactive magnesia-based composites. The aim of the presented research was to develop an ecologically sustainable composite material based on MOC (magnesium oxychloride cement) with excellent mechanical, chemical, and physical properties. The effect of the preparation procedure of MOC pastes doped with graphene nanoplatelets on their fresh and hardened properties was researched. One-step and two-step homogenization techniques were proposed as prospective tools for the production of MOC-based composites of advanced parameters. The conducted experiments and analyses covered X-ray fluorescence, scanning electron microscopy, energy-dispersive spectroscopy, high-resolution transmission electron microscopy, sorption analysis, X-ray diffraction, and optical microscopy. The viscosity of the fresh mixtures was monitored using a rotational viscometer. For the hardened composites, macro- and micro-structural parameters were measured together with the mechanical parameters. These tests were performed after 7 days and 14 days. The use of a carbon-based nanoadditive led to a significant drop in porosity, thus densifying the MOC matrix. Accordingly, the mechanical resistance was greatly improved by graphene nanoplatelets. The two-step homogenization procedure positively affected all researched functional parameters of the developed composites (e.g., the compressive strength increase of approximately 54% after 7 days, and 37% after 14 days, respectively) and can be recommended for the preparation of advanced functional materials reinforced with graphene.

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Section: Resultsmentioning

confidence: 99%

“…All elemental maps are displayed in Figure 7. Relatively higher carbon content was detected, most probably due to the surface reaction with carbon dioxide forming chlorartinite [34]. The collected FT-IR spectra are presented in the form of spectral lines in Figure 8 and as a summarization of the major absorption band assignments in Table 2.…”

Section: Resultsmentioning

confidence: 99%

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

et al. 2021

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“…When calcining magnesite, which is the main procedure in the production of raw materials for MOC, the temperature is much lower than the calcination temperature of calcite being used in the production process of PC [24][25][26]. In addition, as previously described in the literature [27], MOC can absorb the atmospheric CO 2 . MOC can be used as a matrix in composite materials with many different fillers, such as silica sand, fly ash, porcelain waste, and others [28,29].…”

Section: Introductionmentioning

confidence: 99%

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

et al. 2021

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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.

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“…It was reported for MOC-based materials that they are able to offset the CO 2 emissions during the carbonation, and the final net emitted CO 2 linked with the whole life cycle of MOC is, therefore, 40-50% lower than that associated with Portland cement manufacturing [8]. Moreover, as a result of the carbonation of MOC-based composites due to the CO 2 sequestration, improvement of mechanical parameters thanks to the formation of a denser microstructure and a micro-hardness was stated [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Magnesium Oxychloride Cement Composites with Silica Filler and Coal Fly Ash Admixture

et al. 2020

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Worldwide, Portland cement-based materials are the most commonly used construction materials. As the Portland cement industry negatively affects the environment due to the excessive emission of carbon dioxide and depletion of natural resources, new alternative materials are being searched. Therefore, the goal of the paper was to design and develop eco-friendly, low-cost, and sustainable magnesium oxychloride cement (MOC)-based building material with a low carbon footprint, which is characterized by reduced porosity, high mechanical resistance, and durability in terms of water damage. To make new material eco-efficient and functional, silica sand which was used in the composition of the control composite mixture was partially replaced with coal fly ash (FA), a byproduct of coal combustion. The chemical and mineralogical composition, morphology, and particle morphology of FA were characterized. For silica sand, FA, and MgO, specific density, loose bulk density, and particle size distribution were measured. Additionally, Blaine specific surface was for FA and MgO powder assessed. The workability of fresh mixtures was characterized by spread diameter. For the hardened MOC composites, basic structural, mechanical, hygric, and thermal properties were measured. Moreover, the phase composition of precipitated MOC phases and their thermal stability were investigated for MOC-FA pastes. The use of FA led to the great decrease in porosity and pore size compared to the control material with silica sand as only filler which was in agreement with the workability of fresh composite mixtures. The compressive strength increased with the replacement of silica sand with FA. On the contrary, the flexural strength slightly decreased with silica sand substitution ratio. It clearly proved the assumption of the filler function of FA, whereas its assumed reactivity with MOC cement components was not proven. The water transport and storage were significantly reduced by the use of FA in composites, which greatly improved their resistance against moisture damage. The heat transport and storage parameters were only slightly affected by FA incorporation in composite mixtures.

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Carbon Dioxide Uptake by MOC-Based Materials

Cited by 51 publications

References 46 publications

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

MOC Doped with Graphene Nanoplatelets: The Influence of the Mixture Preparation Technology on Its Properties

Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

Magnesium Oxychloride Cement Composites with Silica Filler and Coal Fly Ash Admixture

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