Reduction of the Wetting Collapse of Sandy Gypseous Soil by Using Microbial-Induced Calcite Precipitation

Authors

  • Hadeel S. Sulaiman Department of Civil Engineering, University of Anbar, Ramadi, Iraq Author
  • Muayad A. Al-Sharrad Department of Civil Engineering, University of Anbar, Ramadi, Iraq Author
  • Idham A. Abed College of Agriculture, University of Anbar, Ramadi, Iraq Author

DOI:

https://doi.org/10.56294/sctconf2024817

Keywords:

MICP, Gypseous Soils, Collapsibility

Abstract

Microbial-induced carbonate precipitation (MICP) is a promising technology for cementing sandy soils, improving ground, repairing concrete cracks, and remediating contaminated land. The aim of this research is to implement this technology in mitigating wetting collapse of Ramadi sandy gypseous soil which has a gypsum content of about 35 %. To achieve this aim, the urease-producing bacterial strain Bacillus Megaterium SI was used and treated soil specimens were prepared. The preliminary results showed a well-defined bacterium activity with a precipitated calcite of 13-16,5 % by the end of the first week. The results of the collapsibility test showed that increasing cementation solution molarity from 0,25M to 1M lowered the wetting strain and total strain caused by both loading to 100 kPa and wetting by about 75 %. Therefore, the MICP demonstrates the potential to mitigate the wetting collapse of the sandy gypseous soil despite its high gypsum content.

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Published

2024-01-01

How to Cite

1.
Sulaiman HS, Al-Sharrad MA, Abed IA. Reduction of the Wetting Collapse of Sandy Gypseous Soil by Using Microbial-Induced Calcite Precipitation. Salud, Ciencia y Tecnología - Serie de Conferencias [Internet]. 2024 Jan. 1 [cited 2024 Dec. 12];3:817. Available from: https://conferencias.ageditor.ar/index.php/sctconf/article/view/949