Publication result detail

INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER

ROVNANÍK, P.

Original Title

INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER

English Title

INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

Geopolymer material based on coal fly ash from the high temperature combustion activated with alkali silicate is a very cheap and suitable material for temporary and non-load-bearing structures. For the purposes of emergency application, such as closing barriers, it is necessary to have dry mixtures ready for mixing with water. However, the utilization of dried sodium silicate activator instead of an aqueous solution considerably delays its setting. The application of C12A7 accelerates the setting of alkali activated fly ash, but it also influences its mechanical properties. Early-age strengths are increased, the long term strengths are, however, deteriorated in comparison with the pure material without C12A7. Microstructural changes are described by means of mercury intrusion porosimetry, SEM, XRD and FTIR analysis.

English abstract

Geopolymer material based on coal fly ash from the high temperature combustion activated with alkali silicate is a very cheap and suitable material for temporary and non-load-bearing structures. For the purposes of emergency application, such as closing barriers, it is necessary to have dry mixtures ready for mixing with water. However, the utilization of dried sodium silicate activator instead of an aqueous solution considerably delays its setting. The application of C12A7 accelerates the setting of alkali activated fly ash, but it also influences its mechanical properties. Early-age strengths are increased, the long term strengths are, however, deteriorated in comparison with the pure material without C12A7. Microstructural changes are described by means of mercury intrusion porosimetry, SEM, XRD and FTIR analysis.

Keywords

fly ash, alkali activation, setting accelerator, mayenite

Key words in English

fly ash, alkali activation, setting accelerator, mayenite

Authors

ROVNANÍK, P.

RIV year

2011

Released

01.12.2010

Publisher

VŠCHT

Location

Praha

ISBN

0862-5468

Periodical

CERAMICS-SILIKATY

Volume

54

Number

4

State

Czech Republic

Pages from

362

Pages to

367

Pages count

6

BibTex

@article{BUT50101,
  author="Pavel {Rovnaník}",
  title="INFLUENCE OF C12A7 ADMIXTURE ON SETTING PROPERTIES OF FLY ASH GEOPOLYMER",
  journal="CERAMICS-SILIKATY",
  year="2010",
  volume="54",
  number="4",
  pages="362--367",
  issn="0862-5468"
}