The ageing process of alkali activated metakaolin

authored by: C. H. Rüscher, E. Mielcarek, W. Lutz, A. Ritzmann, W. M. Kriven
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.
Organisation(s): Institute of Mineralogy
External Organisation(s): Clariant AG
University of Illinois at Urbana-Champaign
Type: Conference contribution
Pages: 315-324
No. of pages: 10
Publication date: 28.06.2010
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Ceramics and Composites, Materials Chemistry
Electronic version(s): https://doi.org/10.1002/9780470909836.ch30 (Access: Closed)

BibTeX

@inproceedings{72b8390601d447c58ce0fd90b23dfdbf,
title = "The ageing process of alkali activated metakaolin",
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.",
author = "R{\"u}scher, {C. H.} and E. Mielcarek and W. Lutz and A. Ritzmann and Kriven, {W. M.}",
year = "2010",
month = jun,
day = "28",
doi = "10.1002/9780470909836.ch30",
language = "English",
isbn = "9780470889367",
series = "Ceramic Transactions",
publisher = "American Ceramic Society",
pages = "315--324",
booktitle = "Design, 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",
address = "United States",
note = "8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 ; Conference date: 31-05-2009 Through 05-06-2009",
}