alexa Bio-Mediated Soil Improvement: Load Transfer Mechanisms at the Micro- and Macro- Scales Read More: http: ascelibrary.org doi abs 10.1061 41025%28338%2926
Engineering

Engineering

Journal of Civil & Environmental Engineering

Author(s): Brian C Martinez, Jason T DeJong

Abstract Share this page

New opportunities for utilizing biological processes to modify the engineering properties of the subsurface have recently emerged at the interface of microbiology, geochemistry, and civil engineering. This paper presents an overview of bio-mediated soil improvement systems in the context bio-mediated calcite precipitation of sands. Micro-scale and macro-scale investigations of microbial-induced calcite precipitation (MICP) identify fundamental material properties and mechanical characteristics of bio-cementation. Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) techniques reveal micro-scale calcite formation and degradation characteristics. Calcite minerals are found predominantly near the silica sand grain contacts, strengthening particle bonds. Fracturing of the cemented matrix is found to occur within the calcite phase. A 1-g scaled shallow foundation model is developed to evaluate how MICP treated sands may improve the performance of geosystems at the macro-scale. MICP treatment targets a passive treatment zone of loose sand directly beneath a footing. The spatial distribution of calcite within a sand matrix at the micro-scale translates to a reduction in settlement (or increase in load capacity) at the macro-scale. Comparison of load tests on the footing for MICP treated and untreated experiments reveals up to a five-fold reduction in foundation settlement. 

  • To read the full article Visit
  • Open Access
This article was published in American Society of Civil Engineers and referenced in Journal of Civil & Environmental Engineering

Relevant Expert PPTs

Relevant Speaker PPTs

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords