Computation of X-ray powder diffractograms of cement components and its application to phase analysis and hydration performance of OPC cement

Bulletin of materials science

Rohan Jadhav¹  N C Debnath¹ 

[1] Department of Physics, Institute of Chemical Technology, Mumbai 400 019, India$$Department of Physics, Institute of Chemical Technology, Mumbai 400 019, IndiaDepartment of Physics, Institute of Chemical Technology, Mumbai 400 019, India$$

关键词: Portland cement;    X-ray diffraction;    crystal structure;    characterization;    Rietveld method.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The importance of computed X-ray diffraction patterns of various polymorphs of alite (𝑀₃, ð‘�??₁, ð‘�??), belite (ð›�?, ð›�?), aluminate (cubic, orthorhombic), aluminoferrite, gypsum and hemihydrate in the quantitative phase analysis of cement and its early stage hydration performance is highlighted in this work with three OPC samples. The analysis shows that the predominant silicate phases present in all the samples are 𝑀₃-alite phase and ð›�?-belite phase, respectively. Both cubic and orthorhombic phases of C₃A, brownmillerite, gypsum and hemihydrates are present at different levels. Quantitative phase analysis of cement by Rietveld refinement method provides more accurate and comprehensive data of the phase composition compared to Bogue method. The comparative hydration performance of these samples was studied with ð‘�?/ð‘�? ratio, 0.5 and the results are interpreted in the light of difference in phase compositions viz. ð›�?-C₂S/C₃S ratio, fraction of finer cement particles present in the samples and theoretical modeling of C₃S hydration.

【 授权许可】

Unknown