Luciana Queiroz, Waleska Barbosa, Ana Paula Kirchheim, Carlos Bergmann
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The use of ZnO for the stabilisation of C3S polymorphs
The doping technique is widely used to stabilise C3S polymorphs, combined with synthesis temperature and cooling techniques. This work studied the doping technique using ZnO as a dopant at contents of 1.5, 2.0, 4.0, 8.0, and 10.0wt% and evaluated its effect on the polymorphism and reactivity of C3S. The characterisation of the phases in the anhydrous state was carried out by X-ray diffraction (XRD), and the effect of doping on chemical bonds and displacements in the crystalline structure was identified by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy (RAMAN). Hydration was assessed using isothermal calorimetry and X-ray diffraction (XRD) techniques. The results show a delay in the hydration process in all the doped pastes, a reduction in the average crystallite size with increasing dopant content, and changes in the displacements and symmetry of the polymorphs.
期刊介绍：
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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