Publication detail

Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites

HÚŠŤAVOVÁ, J. ČERNÝ, V. DROCHYTKA, R.

Original Title

Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites

Type

journal article in Web of Science

Language

English

Original Abstract

Quartz sand is the main raw material for the production, of autoclaved calcium silicate composites. However, its resources are rapidly dwindling, and alternative siliceous raw materials need to be sought and tested for replacement. Most often they are raw materials containing amorphous silica. Amorphous silica is more readily soluble than crystalline silica, and thus may contribute to the formation of a superior microstructure of the calcium silicate composite through calcium hydrate phases. This paper is focused on determining the optimal replacement rate of amorphous silica raw material for crystalline silica sand, while describing changes in microstructure of calcium silicate composites. The replacement rate was graded to 0%, 25%, 50%, 75% and 100%. Hydrothermal treatment conditions are based on the real production of autoclaved aerated concrete, so a temperature of 190°C and an isothermal holding time of 7 hours was chosen. To study the effect of the ratio of raw materials on microstructure, X-ray diffraction analysis supported by scanning electron microscopy images was used.

Keywords

Calcium silicate compozite, glass, tobermorite

Authors

HÚŠŤAVOVÁ, J.; ČERNÝ, V.; DROCHYTKA, R.

Released

17. 2. 2020

Publisher

Inštitut za kovinske materiale in technologije

Location

Ljubljana

ISBN

1580-2949

Periodical

Materiali in tehnologije

Year of study

54

Number

1

State

Republic of Slovenia

Pages from

129

Pages to

134

Pages count

6

URL

http://mit.imt.si/izvodi/mit201/hustatova.pdf

BibTex

@article{BUT161654,
  author="Jana {Martanová} and Vít {Černý} and Rostislav {Drochytka}",
  title="Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites",
  journal="Materiali in tehnologije",
  year="2020",
  volume="54",
  number="1",
  pages="129--134",
  doi="10.17222/mit.2019.191",
  issn="1580-2949",
  url="http://mit.imt.si/izvodi/mit201/hustatova.pdf"
}