CE-641 Lecture # 13-14 Geomaterial Characterization Sub-topics - - PowerPoint PPT Presentation

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ENVIRONMENTAL GEOMECHANICS CE-641 Lecture # 13-14 Geomaterial Characterization Sub-topics Need for Geomaterial characterization Geotechnical Mineralogy Morphology Physical Chemical Pore-solution sampling Corrosion

SLIDE 1

ENVIRONMENTAL GEOMECHANICS CE-641 Lecture # 13-14

SLIDE 2

Geomaterial Characterization Sub-topics

Need for Geomaterial characterization
Geotechnical
Mineralogy
Morphology
Physical
Chemical

Pore-solution sampling Corrosion potential Sorption-Desorption

Thermal
Electrical

SLIDE 3

Geomaterial Characterization

Physical Chemical Mineralogical Thermal Electrical Geotechnical properties

Thermo-hydro-mechanical (THM) models in Geotechnical Engg. (Atomic waste disposal & Design of Buffers)

SLIDE 4

GEOTECHNICAL CHARACTERIZATION

Void Ratio & Porosity
Compaction
Consolidation and Compressibility
Hydraulic conductivity
Shear Strength Parameters
Collapse Potential (CP)

= [(e0-ef)/(1+e0)] in %

SLIDE 5

GEOTECHNICAL CHARACTERIZATION

Void Ratio & Porosity
Compaction
Consolidation and Compressibility
Shear Strength Parameters
Hydraulic conductivity
Collapse Potential (CP)

= [(e0-ef)/(1+e0)] in %

’ ef e0

Inundation

SLIDE 6

MINERALOGICAL CHARACTERIZATION

X-Ray Diffraction (XRD)
Scanning Electron Microscope (SEM)

SLIDE 7

Mineralogical Characterization

XRD Diffractograms

200 400 600 M M M M M M M Q Q M M M M M Q

C-I

100 200 300 400 500 G= Glassy phase M=Mullite Q= Quartz M M M M M M M M M M M M M M

Cu-K (2 Deg.) Relative Intensity

C-II

10 20 30 40 50 60 70 80 90 100

50 100 150 G

GGBFS

Minerals Present in Materials Material Mineral* CS Anorthite, Quartz, Montmorillonite WC Kaolinite, Illite IC Calcite, Clinoptilolite, Opal CT, Illite, Smectite, Palygorskite RSS Quartz, Feldspar, Hematite BSS Quartz, Feldspar FA-I Quartz, Mullite, Hematite FA-II Quartz, Mullite, Hematite C-I Quartz, Mullite C-II Mullite GGBFS Glassy phase * JCPDS 1994 Powder diffraction file, 44, 7354-CD ROM (PDF 1- 44), Int. Centre for Diffraction Data, Pennsylvania, USA.