Keyword: «degradation»

The article presents the results of a study of polyethylene samples exposed to natural climatic factors for 18 months by Raman spectroscopy. The spectra were obtained at different depths from the sample surface and it was shown that the stages of material degradation depending on the depth have different degrees. An estimate of the degree of degradation from depth is given, according to which the material undergoes structural changes most intensively at a distance of up to 40 µm from the surface. At depths greater 80–100 µm, structural changes in the material are not detected.

The article is devoted to the study of the results of monitoring the indicators of soil nutrition of LLC «Plodovoye» of the Yeisk district of the Krasnodar Territory. The article presents the data of the results of the agrochemical survey of agricultural soils of the enterprise, analyzes the data obtained by comparing them with the results of the previous round of soil survey, draws appropriate conclusions and prepares recommendations for improving the indicators of soil productivity of the enterprise, as well as suggests ways to combat soil degradation of the enterprise.

As part of this study, a testing program was developed based on an analysis of the operating conditions of pile foundations in Arctic conditions to determine the type of material and manufacturing technology for polymer composite piles. It was shown that the most significant factors are the combined effects of humidity, thermal cycling, air and soil salinity, and UV radiation. Protective coatings minimize changes in properties and surface damage to the polymer composite. It was determined that basalt-fiber reinforced plastic or fiberglass tubular elements manufactured using a wet winding method can be used for the manufacture of bored piles. Based on the conducted research, an analysis of the types and consequences of PCM pile failures in Arctic conditions was conducted. It was determined that the most hazardous areas of an installed PCM pile are the aboveground portion and the section located in the seasonal thaw zone. These results were verified by field tests at the Yakut Scientific Center of the Siberian Branch of the Russian Academy of Sciences.