| A sensitivity study for the visualisation of bacterial weathering of concrete and stone with computerised X-ray microtomography. | |
| | |
MedLine Citation:
|
PMID: 15833250 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Geologists and engineers recently have adopted computerised X-ray microtomography (microCT), a radiological imaging technique, for geological and petrophysical applications such as the assessment of sediment characteristics, CT-measurement of compressibility and compaction, multiphase flow studies, measurement of bulk density and moisture content, and of porosity and permeability. This study focuses on another application: the monitoring of biological weathering of natural building stones and concrete. Microbial activity as a determining factor in the deterioration process of building materials has a major economic impact. Because of its non-destructive character, microCT could be the ideal monitoring technique. With this technique, three-dimensional (3D) images of the entire inner structure of the material can be obtained, together with quantitative data. In depth changes of porosity of concrete and stone specimens due to bacterial weathering were assessed in this work. Also, porosity was visualised based on 3D data with homemade software. Scanning electron microscopy (SEM) images provided additional information and supported conclusions drawn from the X-ray microCT data. Resolution improvement will make the study of petrophysical aspects of physical weathering and/or biological deterioration processes of natural building stones and concrete a promising subject for further microCT-application. |
| | |
Authors:
|
B De Graef; V Cnudde; J Dick; N De Belie; P Jacobs; W Verstraete |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2004-11-24 |
Journal Detail:
|
Title: The Science of the total environment Volume: 341 ISSN: 0048-9697 ISO Abbreviation: Sci. Total Environ. Publication Date: 2005 Apr |
Date Detail:
|
Created Date: 2005-04-18 Completed Date: 2005-06-24 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 173-83 Citation Subset: IM |
Affiliation:
|
Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Technologiepark-Zwijnaarde 904, 9052 Ghent, Belgium. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Biodegradation, Environmental Calcium Carbonate Construction Materials* Microradiography Microscopy, Electron, Scanning Quartz Thiobacillus / metabolism* Tomography, X-Ray Computed / methods* |
| Chemical | |
Reg. No./Substance:
|
14808-60-7/Quartz; 471-34-1/Calcium Carbonate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Distribution of natural and anthropogenic thallium in the soils in an industrial pyrite slag disposi...
Next Document: The impact of volcanic gases from Miyake island on the chemical constituents in precipitation in the...