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Quantifying Biomediated Ground Improvement by Ureolysis: Large-Scale Biogrout Experiment by Leon A. van Paassen; Ranajit Ghose; Thomas J. M. van der Linden; Wouter R. L. van der Star; Mark C. M. van Loosdrecht is a Engineering article available to read on EtoBox.

What is Quantifying Biomediated Ground Improvement by Ureolysis: Large-Scale Biogrout Experiment about?

Biogrouting is a biological ground improvement method, in which microorganisms are used to induce carbonate precipitation in the subsurface in order to increase the strength and stiffness of granular soils. In this paper the results of a large-scale experiment ͑100 m 3 ͒ are presented, in which the feasibility of biogrouting as a ground improvement method is investigated using techniques and equipment similar to those used in potential applications. In situ geophysical measurements were used to monitor the biogrouting process during treatment and indicated that the stiffness had increased significantly after one day of treatment. The results of unconfined compressive strength tests on samples which were excavated after treatment were used to assess the distribution of mechanical properties throughout the cemented sand body, which correlated quite well with the results of the in situ geophysical measurements. The stiffness increase could be quantified as a function of the injected volume of grouting agents and the distance from the injection points. These results will serve as an important benchmark for future applications of biomediated ground improvement.

Who reads Quantifying Biomediated Ground Improvement by Ureolysis: Large-Scale Biogrout Experiment?

Author

Leon A. van Paassen; Ranajit Ghose; Thomas J. M. van der Linden; Wouter R. L. van der Star; Mark C. M. van Loosdrecht

Publisher

American Society of Civil Engineers (ASCE)

Published

2010

Language

EN

Field

Engineering (Physical Sciences)