| Introduction Clinker and
cement phases often give a heavily overlapped peaks on powder data. Phase
identification and particularly quantification is not simple. Quantitative
analysis of clinker components is important, could be done by XRD.
Qunatitative XRD analysis of free lime, CaO, Portlandite,
Ca(OH)2, and calcite, CaCO3. The uniqueness of X-ray
Diffraction is the separation of these and other phases in the matrix. One
cannot discount the importance of this difference in analyses, since the
composition of CaO is the critical factor and not the other two component
Common Phases
Portland cement commonly contain the following phases Alite-C3S
(69-71%), Belite-βC2S (7-14%), Aluminate C3A
(0.2-2%) and Brownmillerite (Ferrite)-C4AF (3-7%), Periclase MgO, Gypsum
CaSO4 2H2O
Detailed phase identification analysis
often reveal many different cement clinkers show quite complicated phase
mixtures: C3S triclinic, C3S-monoclinic, C3S superlattice,
C3S-rhombohedral, β-C2S, a-C2S,
C4AF, C3A cubic, C3A monoclinic, Periclase.
Cement, ceramic industries:
- Phase analysis of clinker to determine strength and
features of hardened cement stone.
- Phase analysis in ceramic material. Determination
of raw material, ceramics and refractories phase composition, as well as ready
products.
- Determination of coefficient of thermal expansion.
- Analysis of technical clinker for content of
certain phases.
- Prediction of concrete strength index.
- Determination of free lime content to control
composition of raw dust and to maintain optimal temperature degree in kiln.
Sample Preparation
Phase Identification
Phase Quantification
Other Application Notes also available: |
