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Chapter 4 The use of μXRF in the characterization of industrial wastes and pozzolanes

  • H. Pöllmann and R. Kilian
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Industrial Waste
This chapter is in the book Industrial Waste

Abstract

A wide variety of natural pozzolanes and industrial slags and ashes were analysed using micro X-ray fluorescence spectroscopy (μXRF) and results were compared to chemical analysis by bulk X-ray fluorescence spectroscopy (XRF) and phase determination by powder X-ray diffraction (XRD). Using the integral μXRF spectrum, results are overall comparable to the XRF results. μXRF maps were segmented based on the spectral characteristics using simple clustering algorithms and as far as phase determination was possible from the chemical composition, the derived modal composition can be compared to XRD. An advantage of μXRF is clearly that the analysis incorporates the microstructural aspect of the material, e.g. phase intergrowth, determination of particle sizes or porosity amongst others, which cannot be captured by bulk analytical methods require destruction of the sample material. Based on mineralogical and chemical analyses the pozzolanity of various natural and industrial materials are characterized and described. Different methods and their results for volcanic ashes, bottom ashes from coal combustion, slags from waste incineration and metal ore processing are given for comparison

Abstract

A wide variety of natural pozzolanes and industrial slags and ashes were analysed using micro X-ray fluorescence spectroscopy (μXRF) and results were compared to chemical analysis by bulk X-ray fluorescence spectroscopy (XRF) and phase determination by powder X-ray diffraction (XRD). Using the integral μXRF spectrum, results are overall comparable to the XRF results. μXRF maps were segmented based on the spectral characteristics using simple clustering algorithms and as far as phase determination was possible from the chemical composition, the derived modal composition can be compared to XRD. An advantage of μXRF is clearly that the analysis incorporates the microstructural aspect of the material, e.g. phase intergrowth, determination of particle sizes or porosity amongst others, which cannot be captured by bulk analytical methods require destruction of the sample material. Based on mineralogical and chemical analyses the pozzolanity of various natural and industrial materials are characterized and described. Different methods and their results for volcanic ashes, bottom ashes from coal combustion, slags from waste incineration and metal ore processing are given for comparison

Chapters in this book

  1. Frontmatter I
  2. Contents V
  3. List of Authors IX
  4. Part 1: Measurement and properties
  5. Chapter 1 Characterization of supplementary cementitious materials and their quantification in cement blends by solid-state NMR 3
  6. Chapter 2 Mineralogical quantification of cements, wastes and supplementary cementitious materials 33
  7. Chapter 3 Microstructure analysis with quantitative phase mapping using SEM-EDS and Phase Recognition and Characterization (PARC) Software: applied to steelmaking slag 57
  8. Chapter 4 The use of μXRF in the characterization of industrial wastes and pozzolanes 97
  9. Part 2: Characterization of industrial residues
  10. Chapter 5 Characterization of supplementary cementitious materials: Brown coal fly ashes 165
  11. Chapter 6 Iron and steel slags: from wastes to by-products of high technical, economical and ecological advantages 203
  12. Chapter 7 Utilization of Supplementary cementitious materials (SCM) in Portland cement, alkali activated and ternary binders 253
  13. Chapter 8 Study of some physico chemical properties of plastic clays belonging to Girujan deposits from Chumoukedima Nagaland, India and their prospective industrial applications 297
  14. Part 3: Use and application of industrial residues
  15. Chapter 9 Conversion of CO2 into useful products 319
  16. Chapter 10 Mine tailings as precursors for alkali-activated materials and ettringite binders 345
  17. Chapter 11 Industrial waste as fuel and raw material in the cement industry 361
  18. Chapter 12 Fly ash from municipal solid waste Incineration: from industrial residue to resource for zinc 379
  19. Chapter 13 Residues of industrial wastewater treatment: Hazardous waste or anthropogenic resource? 403
  20. Chapter 14 Composites of some sustainable siliceous materials for the removal of fluoride from ground water and immobilization of the sludge generated 433
  21. Part 4: Residues from mining
  22. Chapter 15 Characterization and mineral processing options of “Kupferschiefer”-type low-grade black shale ore from mining dumps in Central Germany 455
  23. Chapter 16 Rare-earth elements in phosphogypsum and mineral processing residues from phosphate-rich weathered alkaline ultramafic rocks, Brazil 505
  24. Chapter 17 The Mn oxides tailing from Amazon Region as low-cost raw material to synthesis of shigaite-type phase 541
  25. Chapter 18 Eco-cements out of Belterra Clay: An extensive Brazilian bauxite overburden to produce low-CO2 eco-friendly calcium sulphoaluminate based cements 553
  26. Index 581
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