Detail publikace

The Effect of Exposure Conditions on the Properties of Cementitious Composites with Reduced Electrical Resistivity

UHER V. ČERNÝ, V. DROCHYTKA, R. BARÁNEK, Š.

Originální název

The Effect of Exposure Conditions on the Properties of Cementitious Composites with Reduced Electrical Resistivity

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Cement composite materials with reduced resistivity are specialized building materials, which are constantly pushing their limits. Research into these composites requires a study of the influences of exposure conditions on resistivity. The mixes selected for the purpose of the research included the reference, pure cement mix, and mixes with proportions of graphite under and above the percolation threshold, with two different types of graphite. It was found that the resistivity of all the tested mixes decreases if moisture grows; the influence of moisture is more significant for mixes with graphite proportions below the percolation threshold. The resistivity of all the tested mixes decreases with increasing temperatures; the influence of a higher temperature (50 °C) is more significant for mixes with graphite proportions above the percolation threshold; however, these mixes are, at the same time, more resistant to permanent changes in resistivity caused by frost (−10 °C). It was found that the action of CO2 causes a reduction in resistivity. Mixes with proportions of graphite above the percolation threshold show higher stability when exposed to CO2. Mixes with proportions of graphite below the percolation threshold are extremely sensitive to horizontally oriented pressure loads. Increases in resistivity caused by vertical pressure loads were by 20–40%. The resistivity of the mixes with proportions of graphite above the percolation threshold was less sensitive to the pressure load.

Klíčová slova

cement composite; graphite; electrical resistivity; percolation threshold; moisture; temperature; carbon dioxide; pressure load

Autoři

UHER V.; ČERNÝ, V.; DROCHYTKA, R.; BARÁNEK, Š.

Vydáno

3. 12. 2022

Nakladatel

MDPI

Místo

Switzerland

ISSN

2075-5309

Periodikum

Buildings

Ročník

12

Číslo

12

Stát

Švýcarská konfederace

Strany od

1

Strany do

22

Strany počet

22

URL

https://www.mdpi.com/2075-5309/12/12/2124

BibTex

@article{BUT180733,
  author="Vojtěch {Uher} and Vít {Černý} and Rostislav {Drochytka} and Šimon {Baránek}",
  title="The Effect of Exposure Conditions on the Properties of Cementitious Composites with Reduced Electrical Resistivity",
  journal="Buildings",
  year="2022",
  volume="12",
  number="12",
  pages="1--22",
  doi="10.3390/buildings12122124",
  issn="2075-5309",
  url="https://www.mdpi.com/2075-5309/12/12/2124"
}