NDLI: The variation of bedrock quality with increasing ductile deformation

Content Provider	Springer Nature Link
Author	Göransson, Mattias Persson, Lars Wahlgren, Carl Henric
Copyright Year	2004
Abstract	Most of the rocks in Precambrian shield areas have experienced a complex structural and metamorphic evolution, processes which have a strong influence on the bedrock quality. This may vary both on a local and regional scale. The main object of this investigation was to study the variation of the rock mechanical properties at various stages of ductile deformation of an originally isotropic rock. Ten samples from five different localities northeast of Lake Vänern (south central Sweden) were tested, including studded tyre and LA tests, uniaxial compressive strength (UCS), ultrasonic velocity, electrical resistivity, Swedish impact value and Swedish flakiness index as well as petrographic and chemical analyses. This study highlights the importance of considering all possible variations in bedrock before classification, and of undertaking regional investigations.Dans les régions du bouclier précambrien, la plupart des roches ont connu une évolution structurale et métamorphique complexe, ce qui a une forte influence sur la qualité du bedrock. Celle-ci peut varier à la fois à l’échelle locale et à l’échelle régionale. Le principal objectif de la recherche a été d’étudier la variation des propriétés mécaniques d’une roche initialement isotrope à différents stades de déformation ductile. Dix échantillons de cinq lieux différents au nord-est du lac Vänern (au centre-sud de la Suède) ont été soumis à des essais, dont l’essai de résistance à l’abrasion provoquée par les pneus à crampons, l’essai Los Angeles, la résistance à la compression uniaxiale, la vitesse des ultrasons, la résistivité électrique, l’essai suédois de résistance à la fragmentation par impact et le coefficient d’aplatissement suédois, mais aussi des analyses pétrographiques et chimiques. L’étude met en évidence l’importance qu’il y a à prendre en considération toutes les variations possibles dans le bedrock avant d’établir une classification et de procéder à des recherches régionales.
Starting Page	337
Ending Page	344
Page Count	8
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	63
Issue Number	4
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-06-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Granites Granites deformés Analyses des granulats Propriétés géotechniques Suède
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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