Bio-based Ground Improvement: Impact of Injection Strategy on Calcium Carbonate Distribution in Porous Media

Bio-based Ground Improvement: Impact of Injection Strategy on Calcium Carbonate
Distribution in Porous Media

Leon van PaassenAssociate Professor, School of Sustainable Engineering and the Built Environment (SSEBE) Senior Investigator, Center for Bio-mediated and Bio-inspired Geotechnics (CBBG)Arizona State University

Zoom Recording

Friday, March 3, 2017

Abstract: One of the major challenges of in situ applied ground improvement techniques like
Microbial-Induced Calcite Precipitation (MICP) is to control the spatial distribution of calcium
carbonate (Van Paassen, 2009). In this presentation a new technology is introduced, which is
named DIETZ (Dynamic Internal Erosion Tackling Zones). This technology applies Chemical-Induced Carbonate
Precipitation according to defensive rugby strategy in order to mitigate the internal erosion of water retaining structures and demonstrates how the distribution of calcium carbonate can be controlled by the applied geochemical processes and
injection strategy.

Bio: Leon van Paassen is Associate Professor, at School of Sustainable Engineering and the Built Environment
(SSEBE) and Senior Investigator at the Center for Biomediated and Bio-inspired Geotechnics (CBBG) at Arizona
State University. He has been involved in Biogeotechnical Engineering Research since 2005, in which he managed to
develop biocementation through MICP by urea hydrolysis from lab to field scale.