A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Continuous improvement in mineralogical characterization of gypsum and fly ash
The raw material significantly affects the product performance and cost. For construction material manufacturers, mineralogy is a science of prime importance. It stands at the same level as rheology, hydration chemistry or micromechanics. Mineralogical composition of gypsum, fly ash or cement is generally calculated from elemental analysis data. However, the assumptions used to achieve these calculations introduce a bias. Basic crystal parameters and high quality X-Ray Diffractometer (XRD) data can be combined with a strict methodology to build 'Rietveld XRD files' adapted to the mineral. The so-called Rietveld method gives the exact quantitative crystallographic composition of gypsum, fly ash or cement. In parallel, high sensitivity X-Ray Fluorescence (XRF) gives the quantification of trace elements, Over the years, tedious and numerous wet chemistry methods have been replaced by much more reliable XRF and XRD methods to provide understanding of previously hidden correlation between the raw material and the product and process performances.
Continuous improvement in mineralogical characterization of gypsum and fly ash
The raw material significantly affects the product performance and cost. For construction material manufacturers, mineralogy is a science of prime importance. It stands at the same level as rheology, hydration chemistry or micromechanics. Mineralogical composition of gypsum, fly ash or cement is generally calculated from elemental analysis data. However, the assumptions used to achieve these calculations introduce a bias. Basic crystal parameters and high quality X-Ray Diffractometer (XRD) data can be combined with a strict methodology to build 'Rietveld XRD files' adapted to the mineral. The so-called Rietveld method gives the exact quantitative crystallographic composition of gypsum, fly ash or cement. In parallel, high sensitivity X-Ray Fluorescence (XRF) gives the quantification of trace elements, Over the years, tedious and numerous wet chemistry methods have been replaced by much more reliable XRF and XRD methods to provide understanding of previously hidden correlation between the raw material and the product and process performances.
Continuous improvement in mineralogical characterization of gypsum and fly ash
Piotte, M. (author) / Walenta, G. (author) / Gauthier, M.C. (author) / Caspar, J.P. (author) / Fullman, T. (author)
2002
12 Seiten, 7 Bilder, 16 Quellen
Conference paper
English