Dissolution experiments on dolerite quarry fines at low liquid to solid ratio: a source of calcium for microbial-induced calcite precipitation

Carla C. Casas*, Carl J. Schaschke, Joseph C. Akunna, M. Ehsan Jorat

*Corresponding author for this work

Research output: Contribution to journalArticle


Microbial Induced Calcite Precipitation (MICP) is an emerging soil stabilisation technique consisting of the precipitation of the mineral calcite in the soil matrix. Components required for MICP are currently industry end-products. In this paper, calcium release and reusability of calcium-rich silicate quarry fines, dolerite, are investigated in closed (batch reactor) and open (permeability test) systems at L/S ≤ 1.5 for MICP applications. The large specific surface area and reactive surface area accelerated calcium release, achieving calcium concentrations between 10 and 23 mM for different settings. Dissolution in batch reactor resulted in increased silt (<0.006 mm) and clay fractions. XRF analysis indicated no significant depletion of calcium in the dolerite after dissolution. The study shows dolerite quarry fines dissolution in distilled water at low L/S ratios is a rich source of calcium for MICP applications.
Original languageEnglish
JournalEnvironmental Geotechnics
Early online date25 Sep 2019
Publication statusE-pub ahead of print - 25 Sep 2019


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