Humidity effects on the completion of geopolymerization in dilute evaporative slurries

Brayden E. Glad, Waltraud M Kriven

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

Abstract

Geopolymers provide an attractive alternative to existing materials for a variety of uses, but understanding of the geopolymerization reaction is still incomplete, particularly in real-life situations. Here, the effects of humidity or arid conditions on the completion of geopolymerization of both traditional sodium geopolymer formulations and dilute slurries are investigated. Characterization with Fourier transform infrared spectroscopy and X-ray diffraction quantitatively compare the extent of reaction, which is observed to be incomplete for dilute slurries, and that a portion of the alkali in these systems instead produces sodium carbonate monohydrate (thermonatrite). A preparatory step of 'pre-mixing' for several days the geopolymer reagents in a denser mixture followed by dilution is presented. This preparation is found to be useful in partially mitigating this effect. Possibilities for the kinetic causes for this result are briefly discussed.

Original languageEnglish (US)
Title of host publicationDevelopments in Strategic Materials and Computational Design III - A Collection of Papers Presented at the 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
Pages25-30
Number of pages6
Volume33
Edition10
StatePublished - 2013
EventDevelopments in Strategic Materials and Computational Design III - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012 - Daytona Beach, FL, United States
Duration: Jan 22 2012Jan 27 2012

Other

OtherDevelopments in Strategic Materials and Computational Design III - 36th International Conference on Advanced Ceramics and Composites, ICACC 2012
Country/TerritoryUnited States
CityDaytona Beach, FL
Period1/22/121/27/12

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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