Microstructure of billings shale and biochemical alteration products, Ottawa, Canada

Download
  1. (PDF, 3 MB)
  2. Get@NRC: Microstructure of billings shale and biochemical alteration products, Ottawa, Canada (Opens in a new window)
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleCanadian Geotechnical Journal
ISSN0008-3674
Volume11
Issue4
Pages482489; # of pages: 8
Subjectshale
AbstractA microstructural analysis has been made of altered and unaltered black shale from a site where foundation heave has occurred. Jarosite framboids composed of very small interlocking crystals, much larger crystals of gypsum and microorganisms are described in the altered shale. The relative roles of jarosite, gypsum, and other hydrated sulphates in the generation of heave forces is not fully understood. If jarosite is responsible, most black shales have a heave potential; if gypsum is responsible only black shales which contain carbonate need be of concern. Recognition of fungi and other microbes suggests a more complex biogeochemical cycle than previously supposed; the use of microorganisms as a method of controlling heave warrants more investigation.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-625
NRC number14422
2747
NPARC number20374813
Export citationExport as RIS
Report a correctionReport a correction
Record identifier34246159-6916-4583-a03d-e88f6c0c9139
Record created2012-07-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: