Cement Brick Structure Modified by Magnetic Field Water Cycling after Different Periods of Hardening

The paper presents the phase quantification of cement brick structures after 1, 3, 7 and 28 days of its hardening under the common conditions. The cement brick specimens are investigated after the preliminary magnetic field cycling of mixing water. Experiments show the significant difference between the theoretical values of energies of crystal lattices, Fermi energy, and phase conditions of alite at different periods of cement brick hardening using the magnetic field cycling and the cement-water system of monitoring. Energies of lattice phases of Ca₆H₂O₁₃Si₁₃ (Dellaite), Ca₂FeAlO₅, Ca₂O₄Si, Ca₃O₅Si (Alite) are calculated using the generalized gradient approximation allowing for the electron spin at 0K. The paper presents the analysis of wave functions of valence electrons within the plane wave basis with the momentum truncation radius of 330 eV. The convergence of the total energy comes to ~0,5×10^-6 eV/atom.

метод Ритвельда, количественный фазовый анализ, параметры решетки, кристаллическое строение, портландцемент, цикловая магнитная обработка воды, Rietveld refinement method, quantitative phase analysis, lattice parameters, crystal structure, Portland cement, magnetic cycling of water

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