Microbially induced calcite precipitation (MICP) is an emerging soil stabilisation technique consisting of the precipitation of the mineral calcite in the soil matrix. The components required for MICP are currently industry end products. In this study, the calcium release and reusability of calcium-rich silicate quarry fines, dolerite, were investigated in closed (batch reactor) and open (permeability test) systems at liquid-to-solid (L/S) mass ratios ≤ 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 the batch reactor resulted in increased silt (<0·006 mm) and clay fractions. X-ray fluorescence analysis indicated no significant depletion of calcium in the dolerite after dissolution. The study showed that dolerite quarry fines dissolution in distilled water at low L/S ratios is a rich source of calcium for MICP applications.
|Number of pages||9|
|Early online date||25 Sept 2019|
|Publication status||Published - 30 Sept 2022|
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- Division of Engineering and Food Sciences - Senior Lecturer
Data for - Microbial-Induced Calcite Precipitation in soils: use of alternative raw materials and analysis of environmental implications
Comadran Casas, C. (Creator) & Jorat, E. (Contributor), Abertay University, 2023
Microbial-Induced Calcite Precipitation in soils: use of alternative raw materials and analysis of environmental implicationsAuthor: Comadran Casas, C., Oct 2022
Supervisor: Jorat, M. E. (Supervisor) & Akunna, J. (Supervisor)
Student thesis: Doctoral Thesis