Research is underway into the use of Delithiated β-spodumene as an additive in concrete
Flinders University researchers are turning mining waste into construction materials.
Dr Aliakbar Gholampour from Flinders University’s College of Science and Engineering has focused on finding applications for the rare earth byproduct Delithiated β-spodumene (DβS), produced by lithium refining.
DβS exhibits pozzolanic properties – meaning it reacts chemically to enhance the strength and durability of concrete. The research shows that when used in geopolymer binders, DβS can significantly improve mechanical performance and long-term resilience.
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“By examining the microstructural behaviour of DβS-based geopolymers under varying alkaline activator ratios, we’ve gained critical insights into its suitability as a sustainable concrete ingredient,” Gholampour says.
The findings of the new studies by Dr Gholampour and his team provide insight to the effective incorporation of DβS as an alternative ingredient to fly ash (a coal combustion by-product) in the creation of geopolymer binders. It also identifies the optimal alkaline ratio range for use in geopolymer.
“This approach not only enhances mechanical properties and durability of geopolymer concrete, but also addresses a growing environmental concern by diverting DβS from landfill,” Gholampour says.
“With lithium refining responsible for generating increased volumes of DβS, the capability to reuse this in construction offers a sustainable solution that will reduce industrial waste, prevent potential soil and groundwater contamination, and support circular economic practices in the mining and building sectors.”