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

ENVIRONMENTAL GEOMECHANICS CE-641 Lecture # 13-14

Geomaterial Characterization Sub-topics • Need for Geomaterial characterization • Geotechnical • Mineralogy • Morphology • Physical • Chemical Pore-solution sampling Corrosion potential Sorption-Desorption • Thermal • Electrical

Geomaterial Characterization Physical Chemical Geotechnical Mineralogical properties Thermal Electrical Thermo-hydro-mechanical (THM) models in Geotechnical Engg. (Atomic waste disposal & Design of Buffers)

GEOTECHNICAL CHARACTERIZATION • Void Ratio & Porosity • Compaction • Consolidation and Compressibility • Hydraulic conductivity • Shear Strength Parameters • Collapse Potential (CP) = [(e 0 -e f )/(1+e 0 )] in %

GEOTECHNICAL CHARACTERIZATION • Void Ratio & Porosity • Compaction • Consolidation and Compressibility • Shear Strength Parameters Inundation • Hydraulic conductivity e 0 • Collapse Potential (CP) = [(e 0 -e f )/(1+e 0 )] in % e f  ’

MINERALOGICAL CHARACTERIZATION • X-Ray Diffraction (XRD) • Scanning Electron Microscope (SEM)

Mineralogical Characterization Minerals Present in Materials G= Glassy phase M=Mullite Q= Quartz 600 M C-I Mineral * Material Q CS Anorthite, Quartz, 400 M M M M Montmorillonite Q M Q 200 M M M M M WC Kaolinite, Illite Calcite, Clinoptilolite, Opal CT, IC 0 500 Illite, Smectite, Palygorskite C-II M 400 Relative Intensity RSS Quartz, Feldspar, Hematite 300 M M M BSS Quartz, Feldspar M M M 200 M M M M M FA-I Quartz, Mullite, Hematite M M M 100 FA-II Quartz, Mullite, Hematite 150 G GGBFS C-I Quartz, Mullite 100 C-II Mullite GGBFS Glassy phase 50 * JCPDS 1994 0 Powder diffraction file, 44, 7354-CD ROM 10 20 30 40 50 60 70 80 90 100 Cu-K  (2  Deg.) (PDF 1- 44), Int. Centre for Diffraction Data , Pennsylvania, USA. XRD Diffractograms