RESEARCH ARTICLE


Lithium Aluminosilicate Residue as Raw Material in the Production of Sustainable Concrete Masonry Units: A Brazilian Case



Paulo H. R. Borges*, Flávio A. Santos, Nina Milikic, Francisco J. Belieny Jr., Christiano A. Barsante
Department of Civil Engineering, Federal Centre for Technological Education of Minas Gerais, Av. Amazonas 7675, Belo Horizonte, 30510-000, Brazil


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Creative Commons License
© Borges et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Civil Engineering, Federal Centre for Technological Education of Minas Gerais, Av. Amazonas 7675, Belo Horizonte, 30510-000, Brazil; Tel: +55 31 3319 6826; E-mail: pborges@civil.cefetmg.br


Abstract

Spodumene (LiAlSi2O6) is a natural occurring mineral which is processed to produce lithium carbonate (LiCO3) and lithium hydroxide (LiOH), both used for several industrial and medical applications. The processing of spodumede generates a lithium aluminosilicate residue with no commercial value in Brazil, which is therefore landfilled. This paper studied the effect of the partial replacement of Portland cement (PC) in the production of sustainable concrete masonry units (CMU) for construction. The residue was thoroughly characterized and its interaction with PC was also assessed. Several mixes of CMU were manufactured and compared with a reference mix (without residue). Results indicated that the lithium aluminosilicate is highly reactive and may replace PC in the concrete formulations.

Keywords: Concrete masonry units, Lithium aluminosilicate, Pozzolanic materials, Sustainable construction materials.