Detail publikace

Influence of Use Fluidized Fly Ash Combined with High Temperature Fly Ash on Microstructure of Cement Composite

OSUSKÁ, L. HELA, R. ŤAŽKÝ, M.

Originální název

Influence of Use Fluidized Fly Ash Combined with High Temperature Fly Ash on Microstructure of Cement Composite

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The constraint of using fluidized bed combustion fly ash as addition for concrete is mainly its chemical composition. Increased contents of sulphates and free lime in fluidized bed combustion fly ash causes development of undesirable ettringite during hydration. Expansive character of this mineral can have degrading effect on hardened concrete. Fluidized bed combustion fly ash as well as high temperature fly ash are considered pozzolanic addition, which is capable of reacting with Ca(OH)2 and form similar hydration products as cement hydration. Use of small amount of fluidized bed combustion fly ash can cause production of ettringite, however, when combined with high temperature fly ash, possible micro-failures could be healed with new hydration products - CSH gels. The paper deals with possibilities of confirming this theory mainly through examination of microstructure of cement composite with an electron microscope and clarifying observed hydration products.

Klíčová slova

CSH Gel, Ettringite, Fluidized Bed Combustion Fly Ash, High Temperature Fly Ash, Microstructure

Autoři

OSUSKÁ, L.; HELA, R.; ŤAŽKÝ, M.

Vydáno

1. 12. 2016

Nakladatel

Trans Tech Publication

Místo

Switzerland

ISBN

9783035710793

Kniha

Key Engineering Materials

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Číslo

722

Stát

Švýcarská konfederace

Strany od

146

Strany do

150

Strany počet

5

BibTex

@inproceedings{BUT129276,
  author="Lucia {Ťažká} and Rudolf {Hela} and Martin {Ťažký}",
  title="Influence of Use Fluidized Fly Ash Combined with High Temperature Fly Ash on Microstructure of Cement Composite",
  booktitle="Key Engineering Materials",
  year="2016",
  journal="Key Engineering Materials (print)",
  number="722",
  pages="146--150",
  publisher="Trans Tech Publication",
  address="Switzerland",
  doi="10.4028/www.scientific.net/KEM.722.146",
  isbn="9783035710793",
  issn="1013-9826"
}