Abstract
An urgent problem of current construction is the impossibility of using standard heavy concrete because of several factors: pouring densely reinforced structures, sealing joints, arranging waterproofing. At the same time, the Portland cement used plays an important role in the formation of the structure and properties of fine-grained concrete. Thus, improving the operational properties of cement, including those that have been stored for a long time, is an urgent task for the construction industry. In the present study, the effectiveness of two different grinding devices (a material processing unit—UOM and a planetary ball mill—Activator-4 M) on the activity of stale cement was assessed. The greatest effect of increasing the specific surface area was obtained with mechanical activation in the CCM for 150 s—the specific surface area of the cement increased 1.4 times compared to the initial one. It is shown that an increase in the processing time of cement leads to an increase in the amount of fine cement fractions. The highest values of the strength characteristics were recorded in samples of fine-grained concrete made with the use of cement activated in the cement UOM for 120 s.
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Stel’makh, S., Mailyan, L., Beskopylny, A., Shcherban’, E., Shuiskii, A. (2023). Influence of Technological Factors of Cement Mechanical Activation on the Strength Properties of Fine-Grained Concrete. In: Guda, A. (eds) Networked Control Systems for Connected and Automated Vehicles. NN 2022. Lecture Notes in Networks and Systems, vol 510. Springer, Cham. https://doi.org/10.1007/978-3-031-11051-1_172
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DOI: https://doi.org/10.1007/978-3-031-11051-1_172
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