CUED Publications database

The influence of injection conditions and soil types on soil improvement by microbial functions

Inagaki, Y and Tsukamoto, M and Mori, H and Sasaki, T and Soga, K and Qabany, AA and Hata, T (2011) The influence of injection conditions and soil types on soil improvement by microbial functions. In: UNSPECIFIED pp. 4021-4030..

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Abstract

Research has begun on Microbial Carbonate Precipitation (MCP), which shows promise as a soil improvement method because of its low carbon dioxide emission compared to cement stabilized agents. MCP produces calcium carbonate from carbonates and calcium in soil voids through ureolysis by "Bacillus Pasteurii". This study focuses on how the amount of calcium carbonate precipitation is affected by the injection conditions of the microorganism and nutrient salt, such as the number of injections and the soil type. Experiments were conducted to simulate soil improvement by bio-grouting soil in a syringe. The results indicate that the amount of precipitation is affected by injection conditions and soil type, suggesting that, in order for soil improvement by MCP to be effective, it is necessary to set injection conditions that are in accordance with the soil conditions. © 2011 ASCE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: Biological processes Microbes Salt Soil properties Soil stabilization
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 30 Nov 2014 21:46
DOI: 10.1061/41165(397)411