INFLUENCE OF FINE ADDITIVES AND SURFACTANTS ON THE STRENGTH AND PERMEABILITY DEGREE OF CONCRETE

Oksana Shkromada, Andriy Paliy, Oksana Yurchenko, Nadiia Khobot, Alina Pikhtirova, Ivan Vysochin, Ganna Fedorenko, Anatoliy Paliy

Abstract


The results of studies to determine the effect of titanium dioxide nanoparticles (nanoTiO2), finely dispersed anatase crystalline titanium dioxide (anatazTiO2) and surface-active substances (surfactants) on the compressive strength, degree of permeability and thermal stability of concrete samples are presented. Adding particles of nanotitanium, anatase titanium and surfactants up to 2 % to cement accelerates the hydration process and increases the strength of concrete, and also has a strong effect on its microstructure.

As a result of the studies, it is experimentally proved that the compressive strength of concrete increases with the addition of titanium dioxide (nanoTiO2) nanoparticles by 23.2 %, finely dispersed anatase crystalline titanium dioxide (anatazTiO2) by 21.7 % to 5 % concentration by weight.

In addition, the introduction of these additives reduces the permeability of concrete. This is due to a decrease in the absorption of concrete by water with the addition of nanotitanium and anatase titanium. The introduction of additives from 1 % to 5 % by weight in concrete reduces the depth of chloride penetration by 10–15 times, compared with the control.

The use of temperature-programmed desorption mass spectrometry (TPD-MS) method has shown that an increase in the percentage of TiO2 nanoparticles to 5 % in concrete mixtures correlates with an increase in microporosity and dispersion level of these mixtures, which causes a shift in the peaks of intense gas evolution from the samples when heated to the side low temperatures (for example, carbon dioxide CO2).

The resulting concrete samples are planned to be used for the manufacture of floors in livestock buildings. The injected additives are selected because they are not toxic substances and, in contact with the biological environment of livestock buildings (urine, feces), will not react with them

Keywords


concrete; nanotitanium; anatase titanium; surfactants; compressive strength; permeability; thermal properties

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DOI: http://dx.doi.org/10.21303/2461-4262.2020.001178

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Copyright (c) 2020 Oksana Shkromada, Andriy Paliy, Oksana Yurchenko, Nadiia Khobot, Alina Pikhtirova, Ivan Vysochin, Ganna Fedorenko, Anatoliy Paliy

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ISSN 2461-4262 (Online), ISSN 2461-4254 (Print)