This study presents the development and experimental validation of nanomodified cement obtained by joint grinding of clinker, gypsum, microsilica, polycarboxylate superplasticizer, and dune sand. The optimal composition and technological parameters providing increased strength and performance properties of the binder were studied. A series of cement systems with varying clinker and sand content was prepared, while the amount of gypsum (5 %) and modifier (10 %) remained constant. The results showed that mechanical activation in a ball mill for 110 minutes provided a nanostructured material with a specific surface area of 5500…5700 and an average particle size of 3.5…3.7 ?m. Strength tests have shown that the optimal clinker content is 70...80 %, while replacing up to 20 % of clinker with dune sand does not reduce strength. In this composition, the 28-day compressive strength reached 110…115 МПа, exceeding the control samples by 25…30 %. It was also established that the optimal water-to-cement ratio (W/C = 0.18…0.20) ensures dense microstructure and maximum strength, while higher W/C values lead to increased porosity and strength loss. The findings highlight the potential of nanomodified cement technology for reducing clinker consumption, improving performance, and enhancing the environmental sustainability of cement production.
Khursand M. Saburov – PhD, Acting Associate Professor at the Department of Construction and Environmental Protection, Tashkent University of Architecture and Civil Engineering, Tashkent, Republic of Uzbekistan
Khusnitdin Х. Akramov – DSc, Professor at the Department of Construction and Environmental Protection, Tashkent University of Architecture and Civil Engineering, Tashkent, Republic of Uzbekistan
Alisher U. Auesbaev – PhD, doctoral student, Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan; Associate Professor, Karakalpak State University named after Berdakh, Nukus, Karakalpakstan, Republic of Uzbekistan
Sayyora R. Axundjanova – senior lecturer at the Department of Construction and Environmental Protection, Tashkent University of Architecture and Civil Engineering, Tashkent, Republic of Uzbekistan
Elyor O. Khursandov – assistant of the Department of "Building and Construction", Termez State University of Engineering and Agrotechnologies, Termez, Republic of Uzbekistan
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