Biological improvement of sandy soil by microbial induced carbonate precipitation | ||
| journal of kerbala university | ||
| Article 1, Volume 8, Issue 3, July 2012, Pages 100-110 PDF (0 K) | ||
| Authors | ||
| Mashaalah Khamehchiyan; Karim Rowshanbakht; Mohammad Reza Nikudel; Reza H. Sajedi | ||
| Abstract | ||
| Microbial-induced calcite precipitation (MICP) is a relatively green and sustainable soil improvement technique. It refers to a chemical reaction network that is managed and controlled within soil through biological activity and whose byproducts alter the engineering properties of soil. To treat soil, first, the microbial population in-situ is augmented by the injection of additional urease positive bacteria and then reagents are added. A series of laboratory test was carried out to investigate the potential application of the technique in improving the strength and impermeability of a sand specimen and utilized techniques, materials, methods and empirical process during the test are explained. The results showed that as a result of the calcite precipitation, shear wave velocity increased up to 1000m/s and UCS strength increased to about 300Kpa and permeability of soil decreased significantly upon MICP treatment. | ||
| Keywords | ||
| microbial; induced calcite precipitation; Bio grout; Biological improvement; Geotechnical properties | ||
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