Delithiated <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>β</mi> <mo>−</mo></mrow></math>spodumene as a geopolymer precursor: Fid-Bau Portal

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Delithiated $β -$ spodumene as a geopolymer precursor

Karrech, A. / Dong, M. / Skut, J. / Elchalakani, M. / Shahin, M.

Abstract There is an increasing demand for lithium, which is perceived as the key element of the green revolution. This green image remains incomplete without the circular economic uptake of delithiated $β -$ spodumene (D $β$ S). In a recent contribution, the authors proved that D $β$ S has remarkable pozzolanic properties (Karrech et al., 2019). This paper sheds more light on the early-age and long-term behaviour of D $β$ S derived geopolymer by using advanced characterisation tools based on microscopy and spectroscopy along with standard material testing. Important new results have been obtained using this campaign; while D $β$ S proved to be an acceptable geopolymer precursor, flowability and penetration resistance tests proved that it improves workability and increases initial setting times. The long-term testing proved that embedding D $β$ S produces lower shrinkage, which indicative of good durability.

Highlights • Recycling delithiated $β -$ spodumene as a geopolymer precursor. • Delithiated $β$ -spodumene improves the workability of geopolymer. • Delithiated $β$ -spodumene increases the initial setting time of geopolymer. • Delithiated $β$ -spodumene produces lower drying shrinkage, which is indicative of good durability.

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Delithiated $β -$ spodumene as a geopolymer precursor

Karrech, A. / Dong, M. / Skut, J. / Elchalakani, M. / Shahin, M.

Abstract There is an increasing demand for lithium, which is perceived as the key element of the green revolution. This green image remains incomplete without the circular economic uptake of delithiated $β -$ spodumene (D $β$ S). In a recent contribution, the authors proved that D $β$ S has remarkable pozzolanic properties (Karrech et al., 2019). This paper sheds more light on the early-age and long-term behaviour of D $β$ S derived geopolymer by using advanced characterisation tools based on microscopy and spectroscopy along with standard material testing. Important new results have been obtained using this campaign; while D $β$ S proved to be an acceptable geopolymer precursor, flowability and penetration resistance tests proved that it improves workability and increases initial setting times. The long-term testing proved that embedding D $β$ S produces lower shrinkage, which indicative of good durability.

Highlights • Recycling delithiated $β -$ spodumene as a geopolymer precursor. • Delithiated $β$ -spodumene improves the workability of geopolymer. • Delithiated $β$ -spodumene increases the initial setting time of geopolymer. • Delithiated $β$ -spodumene produces lower drying shrinkage, which is indicative of good durability.

Delithiated $β -$ spodumene as a geopolymer precursor

Karrech, A. / Dong, M. / Skut, J. / Elchalakani, M. / Shahin, M.

Abstract There is an increasing demand for lithium, which is perceived as the key element of the green revolution. This green image remains incomplete without the circular economic uptake of delithiated $β -$ spodumene (D $β$ S). In a recent contribution, the authors proved that D $β$ S has remarkable pozzolanic properties (Karrech et al., 2019). This paper sheds more light on the early-age and long-term behaviour of D $β$ S derived geopolymer by using advanced characterisation tools based on microscopy and spectroscopy along with standard material testing. Important new results have been obtained using this campaign; while D $β$ S proved to be an acceptable geopolymer precursor, flowability and penetration resistance tests proved that it improves workability and increases initial setting times. The long-term testing proved that embedding D $β$ S produces lower shrinkage, which indicative of good durability.

Highlights • Recycling delithiated $β -$ spodumene as a geopolymer precursor. • Delithiated $β$ -spodumene improves the workability of geopolymer. • Delithiated $β$ -spodumene increases the initial setting time of geopolymer. • Delithiated $β$ -spodumene produces lower drying shrinkage, which is indicative of good durability.

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Title:

Delithiated $β -$ spodumene as a geopolymer precursor

Contributors:

Karrech, A. (author) / Dong, M. (author) / Skut, J. (author) / Elchalakani, M. (author) / Shahin, M. (author)

Published in:

Construction and Building Materials ; 309

Publication date:

2021-09-16

ISSN:

DOI:

https://doi.org/10.1016/j.conbuildmat.2021.124974

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Pozzolan , Lithium , Waste management , Recycling , By-products , Circular economy

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