Metakaolin-based geopolymers for nuclear waste encapsulation

D. A. Geddes; X. Ke; S. A. Bernal; M. Hayes; J. L. Provis

doi:10.1007/978-94-024-1207-9_29

Metakaolin-based geopolymers for nuclear waste encapsulation

D. A. Geddes, X. Ke, S. A. Bernal, M. Hayes, J. L. Provis

Department of Architecture & Civil Engineering

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

15 Citations (SciVal)

Abstract

The UK nuclear industry has a significant and challenging stockpile of nuclear wastes, and geopolymers produced from activation of the calcined clay metakaolin offer a valuable alternative to Portland cement-based systems. The characteristics of different formulations of metakaolin-based geopolymers, reacted with sodium and potassium silicate, are therefore of interest. As preliminary steps, the compressive strength and rheology of some metakaolin geopolymer grouts have been studied. This work showed that a potassium silicate-based geopolymer binder, with a sufficiently high water content can be produced to be highly workable. These grouts have a shear stress of approximately 80, Pa at a shear rate of 110, s⁻¹ and can achieve compressive strengths of up to 40, MPa after 7 days of curing. This study is to be expanded in future and compared to the results produced from further analysis performed on the chemical structure of the geopolymer, as well as the overall physical characteristics achieved, to support the immobilisation, incorporation and retention of metal and oil based nuclear wastes.

Original language	English
Title of host publication	Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Editors	F. Martirena, A. Favier, K. Scrivener
Place of Publication	Dordrecht, The Netherlands
Publisher	Springer Netherlands
Pages	183-188
Number of pages	6
ISBN (Print)	9789402412062
DOIs	https://doi.org/10.1007/978-94-024-1207-9_29
Publication status	Published - 1 Jan 2018
Event	2nd International Conference on Calcined Clays for Sustainable Concrete, 2017 - Havana, Cuba Duration: 5 Dec 2017 → 7 Dec 2017

Publication series

Name	RILEM Bookseries
Volume	16

Conference

Conference	2nd International Conference on Calcined Clays for Sustainable Concrete, 2017
Country/Territory	Cuba
City	Havana
Period	5/12/17 → 7/12/17

Funding

Acknowledgements. The PhD project of D. Geddes is funded by the UK Nuclear Decommissioning Authority with input from the National Nuclear Laboratory. This research was performed in part at the MIDAS Facility, at the University of Sheffield, which was established with the support of the Department of Energy and Climate Change. The authors gratefully acknowledge the donation of alkali silicates by PQ Silicates.

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Mechanics of Materials

Access to Document

10.1007/978-94-024-1207-9_29

Cite this

Geddes, D. A., Ke, X., Bernal, S. A., Hayes, M., & Provis, J. L. (2018). Metakaolin-based geopolymers for nuclear waste encapsulation. In F. Martirena, A. Favier, & K. Scrivener (Eds.), Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete (pp. 183-188). (RILEM Bookseries; Vol. 16). Springer Netherlands. https://doi.org/10.1007/978-94-024-1207-9_29

Metakaolin-based geopolymers for nuclear waste encapsulation. / Geddes, D. A.; Ke, X.; Bernal, S. A. et al.
Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. ed. / F. Martirena; A. Favier; K. Scrivener. Dordrecht, The Netherlands: Springer Netherlands, 2018. p. 183-188 (RILEM Bookseries; Vol. 16).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Geddes, DA, Ke, X, Bernal, SA, Hayes, M & Provis, JL 2018, Metakaolin-based geopolymers for nuclear waste encapsulation. in F Martirena, A Favier & K Scrivener (eds), Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. RILEM Bookseries, vol. 16, Springer Netherlands, Dordrecht, The Netherlands, pp. 183-188, 2nd International Conference on Calcined Clays for Sustainable Concrete, 2017, Havana, Cuba, 5/12/17. https://doi.org/10.1007/978-94-024-1207-9_29

Geddes DA, Ke X, Bernal SA, Hayes M, Provis JL. Metakaolin-based geopolymers for nuclear waste encapsulation. In Martirena F, Favier A, Scrivener K, editors, Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. Dordrecht, The Netherlands: Springer Netherlands. 2018. p. 183-188. (RILEM Bookseries). Epub 2017 Oct 28. doi: 10.1007/978-94-024-1207-9_29

Geddes, D. A. ; Ke, X. ; Bernal, S. A. et al. / Metakaolin-based geopolymers for nuclear waste encapsulation. Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. editor / F. Martirena ; A. Favier ; K. Scrivener. Dordrecht, The Netherlands : Springer Netherlands, 2018. pp. 183-188 (RILEM Bookseries).

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Metakaolin-based geopolymers for nuclear waste encapsulation

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