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

abstract

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

Nanofibres, cement, composites, strength

Released

26.08.2018

Publisher

2nd International Conference on Building Materials and Materials Engineering (ICBMM 2018)

Location

Lisbon, Portugal

Pages from

29

Pages to

29

Pages count

1

Documents

BibTex


@misc{BUT155589,
  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="2nd International Conference on Building Materials and Materials Engineering (ICBMM 2018)",
  chapter="155589",
  howpublished="print",
  institution="2nd International Conference on Building Materials and Materials Engineering (ICBMM 2018)",
  year="2018",
  month="august",
  pages="29--29",
  publisher="2nd International Conference on Building Materials and Materials Engineering (ICBMM 2018)",
  type="abstract"
}