Reducing the biogenic corrosion of concrete in a pigsty by using disinfectants

Abstract

The object of this study is the regularity of changes in the biogenic destructive effect of microorganisms on the concrete structural elements of livestock facilities due to the use of the original liquid phase mixture of disinfectant based on aldehyde and surfactant. Microorganisms use construction materials as a substrate for growth and nutrition; they produce citric acid, which leads to a change in the composition and morphology of hydrated cement new formations. The composition of the microflora of the pigsty has been determined, and the minimum concentration of disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride was found. By the TPD MS method, a decrease in the intensity of carbon dioxide (CO2) release in concrete samples during the heating of the sample to 900 °C was proved, compared to the control intact corrosion sample. Electron microscopy of concrete samples shows the presence of destructive changes and colonies of micromycetes. It was established that calcite was intensively released in the control sample of concrete, which retained its integrity and was not subjected to corrosion when heated to a temperature of 600 °C. Electron microscopy confirms the preservation of the homogeneous structure of concrete. The use of a disinfectant based on glutaraldehyde and didecyl dimethyl ammonium chloride at a concentration of 1 % destroys colonies of micromycetes, 2 % – the shell of microorganisms, and 3 % – biofilm. Treatment of concrete with a disinfectant at a concentration of 3 % destroys microorganisms Aspergillus fumigatus and Penicillium oxalicum, inhibits the process of biological corrosion of concrete, and strengthens the structure of concrete. The results of the experiment can be applied to inhibit the corrosion of concrete and extend the life of building structures made of concrete through the use of a disinfectant based on aldehyde and didecyl dimethyl ammonium chloride at a concentration of 3 %.

Determining changes in the mineral composition of concrete due to chemical corrosion in a sulfate environment

“…At a depth of 4 cm, the level of calcium oxide content is the same in both samples, which brings chemical corrosion of the surface layer of concrete to a depth of 4 cm. Researchers [17] reported similar results as a result of corrosion of concrete in the pigsty room, when the result of destruction was the loss of calcium carbonate.…”

Improving the technique of protecting concrete floors in poultry houses

“…In work [6], the composition of the microflora of the piggery was investigated and the effective concentration of the disinfectant for the destruction of microorganisms in the piggery was determined. The study was conducted under specific farm conditions, so the effectiveness of the proposed disinfectant may vary depending on the object.…”