Publication result detail

Electrically conductive composite materials with incorporated waste and secondary raw materials

BARÁNEK, Š.; ČERNÝ, V.; DROCHYTKA, R.; MÉSZÁROSOVÁ, L.; MELICHAR, J.

Original Title

Electrically conductive composite materials with incorporated waste and secondary raw materials

English Title

Electrically conductive composite materials with incorporated waste and secondary raw materials

Type

WoS Article

Original Abstract

Silicate composites have very low conductivity in general. It is possible to achieve an electrical resistivity decrease by adding an electro-conductive filler. The conductive mixture consists of cementitious binder, various types of silica sand, and graphite-based conductive fillers. One of the research focusses is partial substitution of ordinary raw materials by alternative components (waste materials by-products and secondary raw materials) and its influence on composite properties. The alternative components studied were fly ash as a partial binder replacement, waste graphite from two different sources and steel shavings as a substitute for conductive filler. Resistivity of cured conductive silicate-based specimens was analysed in relation to changes in physico-mechanical properties in context of microstructural changes in the hardened cementitious matrix (by optical and scanning electron microscopy with energy disperse analysis). Partial substitution of cement by fly ash was found to reduce the electrical resistivity of the composite. Some of the waste graphite fillers significantly reduce the resistivity of the cement composite and increase the compressive strength. It was proven, that is possible to replace primary conductive fillers by secondary raw materials.

English abstract

Silicate composites have very low conductivity in general. It is possible to achieve an electrical resistivity decrease by adding an electro-conductive filler. The conductive mixture consists of cementitious binder, various types of silica sand, and graphite-based conductive fillers. One of the research focusses is partial substitution of ordinary raw materials by alternative components (waste materials by-products and secondary raw materials) and its influence on composite properties. The alternative components studied were fly ash as a partial binder replacement, waste graphite from two different sources and steel shavings as a substitute for conductive filler. Resistivity of cured conductive silicate-based specimens was analysed in relation to changes in physico-mechanical properties in context of microstructural changes in the hardened cementitious matrix (by optical and scanning electron microscopy with energy disperse analysis). Partial substitution of cement by fly ash was found to reduce the electrical resistivity of the composite. Some of the waste graphite fillers significantly reduce the resistivity of the cement composite and increase the compressive strength. It was proven, that is possible to replace primary conductive fillers by secondary raw materials.

Keywords

Electricall conductive silicates; secondary raw materials; impedance

Key words in English

Electricall conductive silicates; secondary raw materials; impedance

Authors

BARÁNEK, Š.; ČERNÝ, V.; DROCHYTKA, R.; MÉSZÁROSOVÁ, L.; MELICHAR, J.

RIV year

2024

Released

03.06.2023

Publisher

NATURE PORTFOLIO

Location

Berlín

ISBN

2045-2322

Periodical

Scientific Reports

Volume

13

Number

9023

State

United Kingdom of Great Britain and Northern Ireland

Pages count

23

URL

https://www.nature.com/articles/s41598-023-36287-x

BibTex

@article{BUT183906,
  author="Šimon {Baránek} and Vít {Černý} and Rostislav {Drochytka} and Lenka {Mészárosová} and Jindřich {Melichar}",
  title="Electrically conductive composite materials with incorporated waste and secondary raw materials",
  journal="Scientific Reports",
  year="2023",
  volume="13",
  number="9023",
  pages="23",
  doi="10.1038/s41598-023-36287-x",
  issn="2045-2322",
  url="https://www.nature.com/articles/s41598-023-36287-x"
}