Publication detail

Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Composites

BODNÁROVÁ, L. HELA, R. SEDLÁČEK, D.

Original Title

Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Composites

English Title

Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Composites

Type

journal article in Web of Science

Language

en

Original Abstract

The paper deals with the verification of the effect of the addition of inorganic SiO2 nanofibers to cement composites. In the first stage, a stable suspension of SiO2 nanofibers was prepared in an aqueous medium. It is important to distribute nanofibers so that the nanofibers do not appear in the form of clumps and at the same time do not get damaged during the dispersion process. The ultrasonification process was used for dispersion. The dispersed suspension of SiO2 nanofibers and water was dosed together with the superplasticizing admixtures into the dry components of the cement composite and the components were homogenized. The properties of the cement composite with SiO2 nanofibers have been tested – compressive strength, flexural strength, density. Composites with the addition of SiO2 nanofibers at a dose of 0.008 % by weight of cement exhibited an increased compressive strength of up to 33 % and a 19 % greater flexural strength at doses of 0.016 and 0.032 % of cement weight than the reference sample without nanofibers. The presence of SiO2 nanofibers in the composite was monitored by scanning electron microscopy (SEM).

English abstract

The paper deals with the verification of the effect of the addition of inorganic SiO2 nanofibers to cement composites. In the first stage, a stable suspension of SiO2 nanofibers was prepared in an aqueous medium. It is important to distribute nanofibers so that the nanofibers do not appear in the form of clumps and at the same time do not get damaged during the dispersion process. The ultrasonification process was used for dispersion. The dispersed suspension of SiO2 nanofibers and water was dosed together with the superplasticizing admixtures into the dry components of the cement composite and the components were homogenized. The properties of the cement composite with SiO2 nanofibers have been tested – compressive strength, flexural strength, density. Composites with the addition of SiO2 nanofibers at a dose of 0.008 % by weight of cement exhibited an increased compressive strength of up to 33 % and a 19 % greater flexural strength at doses of 0.016 and 0.032 % of cement weight than the reference sample without nanofibers. The presence of SiO2 nanofibers in the composite was monitored by scanning electron microscopy (SEM).

Keywords

SiO2 nanofibers, cement composite, strength, SEM

Released

08.04.2019

Publisher

EDP Series

ISBN

2261-236X

Periodical

MATEC Web of Conferences

Year of study

278

Number

2019

State

FR

Pages from

1

Pages to

5

Pages count

5

URL

Full text in the Digital Library

Documents

BibTex


@article{BUT159492,
  author="Lenka {Bodnárová} and Rudolf {Hela} and Daniel {Sedláček}",
  title="Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Composites",
  annote="The paper deals with the verification of the effect of the addition of inorganic SiO2 nanofibers to cement composites. In the first stage, a stable suspension of SiO2 nanofibers was prepared in an aqueous medium. It is important to distribute nanofibers so that the nanofibers do not appear in the form of clumps and at the same time do not get damaged during the dispersion process. The ultrasonification process was used for dispersion. The dispersed suspension of SiO2 nanofibers and water was dosed together with the superplasticizing admixtures into the dry components of the cement composite and the components were homogenized. The properties of the cement composite with SiO2 nanofibers have been tested – compressive strength, flexural strength, density. Composites with the addition of SiO2 nanofibers at a dose of 0.008 % by weight of cement exhibited an increased compressive strength of up to 33 % and a 19 % greater flexural strength at doses of 0.016 and 0.032 % of cement weight than the reference sample without nanofibers. The presence of SiO2 nanofibers in the composite was monitored by scanning electron microscopy (SEM).",
  address="EDP Series",
  chapter="159492",
  doi="10.1051/matecconf/201927801009",
  howpublished="online",
  institution="EDP Series",
  number="2019",
  volume="278",
  year="2019",
  month="april",
  pages="1--5",
  publisher="EDP Series",
  type="journal article in Web of Science"
}