Geomaterial Characterization Sub-topics Need for Geomaterial - PowerPoint PPT Presentation

Geomaterial Characterization Sub-topics • Need for Geomaterial characterization • Geotechnical • Micro-biological (Bio-geo Interface) • Mineralogy • Morphology • Physical • Chemical Pore-solution sampling Corrosion potential Sorption-Desorption • Thermal • Electrical • Magnetic • Radiological

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 • 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

Minerals the Original and Activated ash samples (treated with NaOH) Minerals Original Activated   Quartz   Mullite  NaP1 zeolite X  Hydroxy-sodalite X zeolite

SEM Micrographs (Original ash samples)

SEM Photographs of Activated ash samples

SEM Micrographs (Original ash samples) (a) Sample S1F1 (b) Sample S2F2 (c) Sample SA35F2 (d) Sample SA50F3 (e) Sample SA35F4 (f) Sample SA50F5

Agglomeration of Ash Particles due to Flue Gas Conditioning (a) Sample CA8S12F1 (b) Sample CA8S12F2 (c) Sample CA8S12F3 (d) Sample CA8S12F4 (e) Sample CA8S12F5 (f) Sample CA8S12F6