Detail publikace

Graphene- and Graphite Oxide-Reinforced Magnesium Oxychloride Cement Composites for the Construction Use

LAUERMANNOVÁ, A. LOJKA, M. PAVLÍKOVÁ, M. PIVÁK, A. ZÁLESKÁ, M. PAVLÍK, Z. ZMEŠKAL, O. JANKOVSKÝ, O.

Originální název

Graphene- and Graphite Oxide-Reinforced Magnesium Oxychloride Cement Composites for the Construction Use

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Graphene and graphite oxide reinforced magnesium oxychloride cement (MOC) pastes were researched. To produce MOC pastes, the light-burnt magnesium oxide was added and dispersed in the magnesium chloride solution. The graphene powder, graphite oxide powder, and their combination were incorporated in the solution. The total amount of the nano additives was 0.5 % by the weight of the magnesium oxychloride binder. The morphology and microstructure of the hardened materials were studied using scanning electron microscopy (SEM). The phase composition of precipitated MOC-based products was investigated using X ray diffraction (XRD). The macrostructural parameters of the composites such as bulk density, specific density, and open porosity were evaluated. Mechanical strength and stiffness were analyzed by the measurement of flexural and compressive strength and dynamic elastic modulus. The electrical properties were examined by the use of impedance spectroscopy (IS). From the experimental results the model of the transport of electric charge in researched materials dispersion was estimated. The use of graphene- and graphite oxide-reinforcement of MOC matrix gave highly dense materials of low porosity, high mechanical resistance, whereas the used nano-additives enabled the produce of composites of high strength efficiency index. The addition of graphene particles and the formation of graphite agglomerates significantly decreased electrical resistivity of the MOC matrix which was originally characterized by low electrical conductivity.

Klíčová slova

Graphene, Composites, Magnesium oxychlorides, Multiwalled Carbon Nanotubes, metal-Ionsmechanical-Properties, doped Graphene, silica Fume, adsorption, phase, water, reduction, hydration

Autoři

LAUERMANNOVÁ, A.; LOJKA, M.; PAVLÍKOVÁ, M.; PIVÁK, A.; ZÁLESKÁ, M.; PAVLÍK, Z.; ZMEŠKAL, O.; JANKOVSKÝ, O.

Vydáno

23. 5. 2021

Nakladatel

University of Chemistry and Technology, Prague

Místo

PRAGUE 6

ISSN

1804-5847

Periodikum

CERAMICS-SILIKATY

Ročník

65

Číslo

1

Stát

Česká republika

Strany od

38

Strany do

47

Strany počet

10

URL

https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1388

Plný text v Digitální knihovně

http://hdl.handle.net/11012/204076

BibTex

@article{BUT177262,
  author="Anna-Marie {Lauermannová} and Michal {Lojka} and Milena {Pavlíková} and Adam {Pivák} and Martina {Záleská} and Zbyšek {Pavlík} and Oldřich {Zmeškal} and Ondřej {Jankovský}",
  title="Graphene- and Graphite Oxide-Reinforced Magnesium Oxychloride Cement Composites for the Construction Use",
  journal="CERAMICS-SILIKATY",
  year="2021",
  volume="65",
  number="1",
  pages="38--47",
  doi="10.13168/cs.2020.0040",
  issn="1804-5847",
  url="https://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1388"
}