Detail publikace

The Influence of Secondary Raw Materials on Tobermorite Formation in Calcium-Silicate Composites

HÚŠŤAVOVÁ, J. ČERNÝ, V. DROCHYTKA, R.

Originální název

The Influence of Secondary Raw Materials on Tobermorite Formation in Calcium-Silicate Composites

Typ

článek v časopise ve Scopus, Jsc

Jazyk

angličtina

Originální abstrakt

The physical-mechanical properties of calcium-silicate composites depend on their microstructure, which itself, in autoclaved aerated concrete especially, depends on the formation and morphology of the calcium hydrosilicate phases. The main one of these phases is tobermorite, which is what this paper is focused on. Two secondary raw materials representing two main groups of by-products are discussed. Namely, these are fluidized bed combustion fly ash and slag produced by the incineration and power plants. Studying the utilisation of secondary raw materials has become a necessity for both environmental and financial reasons. Selected raw materials were mixed with lime only. In this way, the conditions eliminating the effects of other impurities were ensured. The material’s molar ratio of calcium oxide to silicon dioxide was 0.73 and 1.0. The material samples were then autoclaved at two temperatures (170 and 190 °C) and three different hydrothermal durations (4, 8 and 16 hours). The results indicate that slag appears to be promising material. Samples containing slag reached the same compressive strength as reference samples at 190°C with a molar C/S ratio of 0.73.

Klíčová slova

Tobermorite; calcium-silicate composite; fluidized bed combustion fly ash; slag

Autoři

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

Vydáno

17. 12. 2018

Nakladatel

CEMC – České ekologické manažerské centrum, z.s.,

Místo

Praha

ISSN

1804-0195

Periodikum

Waste forum

Ročník

2018

Číslo

4

Stát

Česká republika

Strany od

467

Strany do

475

Strany počet

9

URL

http://www.wasteforum.cz/cisla/WF_4_2018.pdf

BibTex

@article{BUT152027,
  author="Jana {Martanová} and Vít {Černý} and Rostislav {Drochytka}",
  title="The Influence of Secondary Raw Materials on Tobermorite Formation in Calcium-Silicate Composites",
  journal="Waste forum",
  year="2018",
  volume="2018",
  number="4",
  pages="467--475",
  issn="1804-0195",
  url="http://www.wasteforum.cz/cisla/WF_4_2018.pdf"
}