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

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

Jan 27, 2023 409 likes •528 views

Geomaterial Characterization Sub-topics Need for Geomaterial characterization Geotechnical Micro-biological (Bio-geo Interface) Mineralogy Morphology Physical Chemical Pore-solution sampling Corrosion potential

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SLIDE 1

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
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SLIDE 2

Geomaterial Characterization Physical Chemical Mineralogical Thermal Electrical Geotechnical properties

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

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SLIDE 3

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

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SLIDE 4

MINERALOGICAL CHARACTERIZATION

  • X-Ray Diffraction (XRD)
  • Scanning Electron Microscope (SEM)
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SLIDE 5

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.

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SLIDE 6

Minerals the Original and Activated ash samples (treated with NaOH)

Minerals Original Activated Quartz

 

Mullite

 

NaP1 zeolite X

Hydroxy-sodalite X  zeolite

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SLIDE 7

SEM Micrographs (Original ash samples)

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SLIDE 8

SEM Photographs of Activated ash samples

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SLIDE 9

(a) Sample S1F1 (b) Sample S2F2 (c) Sample SA35F2 (d) Sample SA50F3 (e) Sample SA35F4 (f) Sample SA50F5

SEM Micrographs (Original ash samples)

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SLIDE 10

(a) Sample CA8S12F1 (b) Sample CA8S12F2 (c) Sample CA8S12F3 (d) Sample CA8S12F4 (e) Sample CA8S12F5 (f) Sample CA8S12F6

Agglomeration of Ash Particles due to Flue Gas Conditioning