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Information × Registration Number 0226U001368, (0123U101832) , R & D reports Title Development of reactive powder concretes of increased efficiency based on alkali-activated cements for the protection of critical infrastructure facilities popup.stage_title Технологічні ос-нови виготовлен-ня і експлуатації матеріалів на ос-нові наномодифі-кованих лужних портландцементів Head Rudenko Ihor I., Доктор технічних наук Registration Date 24-01-2026 Organization Kyiv National University of Construction and Architecture popup.description1 The purpose of scientific and technical work is to create new materials and develop practical and technological solutions for obtaining ultra-high-strength reactive powder concrete based on alkali-activated nanomodified cements, which will be used for the construction and protection of critical infrastructure facilities. popup.description2 The physico-chemical technological basis for obtaining high-performance reactive powder concrete (RPC) designed to protect critical infrastructure facilities has been created. This effect was achieved through the use of rapid-hardening alkali-activated portland cements with reduced clinker content (granulated blast furnace slag content - 5...55%) and by giving them special properties by modifying additives. A method for calculating the formulation of RPC based on low-emission nanomodified alkali-activated cements and technological recommendations for their manufacture and use have been developed. The result is an alkali-activated cement RPC of strength class C80/95 with high early strength kinetics (52.3; 76.3; 85.0 MPa at 1, 2, and 3 days), high crack resistance, capable to ductile failure (ratio between compressive strength and flexural strength 5.3...5.9), reduced shrinkage deformations (0.5...0.6 mm/m). The durability of RPC has been proven by the criteria of weather resistance (after 100 cycles of alternating wetting/drying, the strength of the samples decreased by ≈6...8%), water resistance (the ratio of the strength of water-saturated samples to dry ones is 0.96... 0.98) and frost resistance (grades not less than F200). In terms of strength gain rate, the developed RPC significantly outperforms analogues based on alumina cement, super-rapid-hardening portland cement and low-water-demand cement, with acceptable shrinkage deformations. The characteristic features of the influence of the hardening time factor on the properties of the obtained RPC are a steady increase in key properties. Thus, depending on the alkali activator, RPC is characterised by an increase in properties after 360 days compared to 28 days: compressive strength – by 11.4...86.1%, impact strength – by 11.3...31.6%. Taking into account the physical, mechanical, technological, operational and special characteristics, the obtained RPC is ‘high-perfomance’. Product Description popup.authors Oleksandr Chekhovskyi Yaroslav V. Bilan Ihor Rudenko Oleksandr Gelevera Alla Maystrenko popup.nrat_date 2026-01-24 Close