The ageing process of alkali activated metakaolin

C. H. Rüscher, E. Mielcarek, W. Lutz, A. Ritzmann, W. M. Kriven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The ageing of metakaolin-based geopolymer of special composition (1.2K 2O·Al2O3·4.2SiO 2· 14H2O) has been studied by flexural force measurements, a molybdate analytical method and Fourier transform infrared spectroscopy (FTIR). The results enable new insight into details of the structural development responsible for early strength development between 25 h and 100 h and the unfavorable weakening for ageing above 200 h. In particular the increase in strength is related to the slow development of an aluminosilicate network enclosing preformed polysilicate chains. A fast condensation of silicate chains occurs during the dissolution of metakaolin in the first 25 h of the ageing process. The subsequent destruction of polymeric silicate chains finally causes the weakening.

Original languageEnglish (US)
Title of host publicationDesign, Development, and Applications of Engineering Ceramics and Composites - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM 8
PublisherAmerican Ceramic Society
Pages315-324
Number of pages10
ISBN (Print)9780470889367
DOIs
StatePublished - Jan 1 2010
Event8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 - Vancouver, BC, Canada
Duration: May 31 2009Jun 5 2009

Publication series

NameCeramic Transactions
Volume215
ISSN (Print)1042-1122

Other

Other8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8
CountryCanada
CityVancouver, BC
Period5/31/096/5/09

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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