Influence of Fine Additives and Surfactants on the Strength and Permeability Degree of Concrete

Abstract

The results of studies to determine the effect of titanium dioxide nanoparticles (nanoTiO 2 ), finely dispersed anatase crystalline titanium dioxide (anatazTiO 2 ) 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 (nanoTiO 2 ) nanoparticles by 23.2 %, finely dispersed anatase crystalline titanium dioxide (anatazTiO 2 ) by 21.7 % to 5 % concentration by weight. Original Research Article: full paper (2020), «EUREKA: Physics and Engineering» Number 2 20Chemical EngineeringIn 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 TiO 2 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 CO 2 ).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.

A review of the effect and optimization of use of nano-TiO2 in cementitious composites

“…There is a lack of information about how titania nanoparticles affect the carbonation resistance of cement-based materials [103]. Moreover, contradictory results have been found in the available publications related to this topic.…”

Development of a method of protection of concrete floors of animal buildings from corrosion at the expense of using dry disinfectants

“…To solve these problems, researchers in the work proposed on the basis of nanoparticles of titanium dioxide (nano TiO 2 ), finely dispersed titanium dioxide in anatase crystalline form (anatase TiO 2 ), surfactants (alkyl trimethylamine chloride), which makes it possible to increase the resistance of concrete under aggressive operating conditions. However, the experience does not consider the issue of concrete protection during long-term operation [5].…”

Defining patterns in the influence exerted by the interelated biochemical corrosion on concrete building structures under the conditions of a chemical enterprise

“…According to the results of temperature-programmed desorption mass spectrometry studies, a comparative analysis of the relative number of ions of chemical compounds (О 2 ; Н 2 О; СО 2 ; SO 2 ) in the experimental samples of concrete was performed (Fig. 2,3,5,6). The mechanism of formation of chemical compounds in concrete compared to control samples was established and explained.…”

“…In addition, the resistance of microorganisms to antimicrobial agents is not always taken into consideration. In the premises where people work or animals are kept, not all effective antimicrobial compounds can be used due to the release of some toxic agents during their operation [5].…”