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Документ Development of Lightweight Grouting Materials Based on By-Products of Ukrainian Industry(Національний університет "Львівська політехніка", 2023) Orlovskyy, Vitalii; Bileckyy, Volodymyr; Malovanyy, MyroslavA new competitive class of grouting materials has been created. These lightweight grouting materials (LGM) with a density of 1370–1650 kg/m3 consist of oil well Portland cement PCTI-100, fine powder of PE grade (a by-product of fireclay production from kaolin), acidic fly ash from state district power plants, and lime dust (a by-product of lime production). The composition of the products formed during LGM hydration was clarified by X-ray phase and differential thermal analysis. The rational optimal ratios of ingredients and temperature regimes for the LGM hardening were determined according to the criteria of cement stone strength.Документ Thermostable plugging materials hydration(Lviv Polytechnic National University, 2021) Orlovskyy, V. M.; Malovanyy, M. S.; Biletskyi, V. S.; Sokur, M. I.A new competitive class of plugging compositions (weighted non-shrink plugging materials) has been created using as components a fly ash from thermal power station, a weighting additive and a superplasticizer. X-ray phase analysis identified the composition of new materials formed in the hydration process of the developed plugging compositions. The kinetic curves of the plugging material expansion in a wide temperature range have been obtained. Rational temperature regimes of plugging materials hardening according to the criteria of strength and gas permeability of cement stone have been determined.