Structure and Phase Composition of Cement Brick After Different Processing of Cement Paste Mixed With Water

The paper presents the qualitative phase analysis of cement brick after 28 days of hardening and different processing of cement paste modified with nanoparticles. The cement-nanoagent-mixing water flow-chart is studied to prepare the cement paste. The correlation is determined for strength values of investigated cements brick samples. The qualitative phase analysis is carried out for 6 processing methods using the Rietveld refinement. It is shown that the major phases of the cement brick are Ca3H6O10Si2, Ca6H2O13Si3, Ca2H6O11Si3, Ca5H2O10Si2, H2O2Ca. The phase composition is estimated by the contribution of phase intensities to the integral intensity which, in turn, is compared to the experimental diffraction pattern. Mass fractions of phase lattices are calculated in the paper. It is found that the above mentioned phases are in a stable state, and a certain atom redistribution can be allowed inside the phase lattices as well as variations of the number of atoms in the cells.

цементный камень, метод Ритвельда, наномодификатор, активированная вода, прочность, цикловая обработка, фазовый состав, параметры решетки, кристаллическое строение, cement brick, Rietveld refinement, nanoagent, mixing water, strength, magnetic field cycling, phase composition, lattice parameters, crystalline structure

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