Journal
CEMENT AND CONCRETE RESEARCH
Volume 41, Issue 1, Pages 107-112Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2010.09.012
Keywords
Geopolymer; Fly ash; Basic sodalite; Bulk modulus; High pressure
Funding
- King Abdullah University of Science and Technology (KAUST) [KUS-l1-004021]
- NIST [60NANB10D014]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
Ask authors/readers for more resources
Synthetic basic sodalite, Na-8[AlSiO4](6)(OH)(2)center dot 2H(2)O, cubic, P43n, (also known as hydroxysodalite hydrate) was prepared by the alkaline activation of amorphous aluminosilicate glass, obtained from the phase separation of Class F fly ash. The sample was subjected to a process similar to geopolymerization, using high concentrations of a NaOH solution at 90 degrees C for 24 hours. Basic sodalite was chosen as a representative analogue of the zeolite precursor existing in Na-based Class F fly ash geopolymers. To determine its bulk modulus, high-pressure synchrotron X-ray powder diffraction was applied using a diamond anvil cell (DAC) up to a pressure of 4.5 GPa. A curve-fit with a truncated third-order Birch-Murnaghan equation of state with a fixed K'(o) = 4 to pressure-normalized volume data yielded the isothermal bulk modulus, K-o = 43 +/- 4 GPa, indicating that basic sodalite is more compressible than sodalite, possibly due to a difference in interactions between the framework host and the guest molecules. (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available