Interaction Energy in a Suspension of Gypsum and Dispersed Limestone

Abstract:

The article describes results of the determination of the interaction energy between particles of a hydrating binder and filler, a solution and base. It was found that in the case of particles having a diameter of 17 μm, a mineral suspension should be practically stable, since the energy barrier is much higher than the thermal motion energy of the particles and is 166 kT (100% gypsum), 125 kT (100% CaCO₃), 63 kT (gypsum-filler 90:10), and 41kT (gypsum-filler 80:20). A further increase in the amount of CaCO₃ particles leads to a significant reduction in the barrier, which at the gypsum-to-filler ratio of 70:30 is 6 kT, and at the ratio of 50:50 completely disappears. In the interaction of the smallest particles (5 μm), the energy barrier values are: 44 kT (100% gypsum), 28 kT (100% CaCO₃), 18 kT (gypsum-filler 90:10), 7 kT (80:20) and 2 kT (70:30). With the component ratio of 50:50, the energy barrier completely disappears, and the particles become denser in the first potential well.

• Periodical: Materials Science Forum (Volume 934)
• Pages: 227-231
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.934.227
• Online since: October 2018
• Authors: Inna V. Kolesnikova, Aikhyn A. Kurmankozhayeva, Aliya S. Azhibekova*
• Keywords: Calcium Carbonate, Dispersed Limestone, Energy Barriers, Filler

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