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2 2024

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Study of the Thermomechanical Behavior of the Compressed Earth Bloc when Adding Plastic Bag Slices

Fidjah Abdelkader, Zazou Rahma Laredj, Belmehdi Nadjia, Ushcats Svitlana, Sengra Kheira, Sayeh Mohammad Elamine, Djaber Safa Marwa, Lyndiuk Olena, Melenti Yevhen, Melnyk Vladyslav

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 11

274--283

Plastic waste management is a complex problem that has negative effects on the environment, society, and the economy. The development of science has made humanity use plastic materials a lot, and because it does not cost to manufacture and is recyclable, it is used in most industries. Plastic contains polyethylene, most of it does not biodegrade and remains in the environment for long periods, and its abundant accumulation leads to many environmental and health hazards to humans. This research, which aims to recycle plastic bags in the field of construction, is of utmost importance in addressing the pressing issue of plastic waste management. The plastic will likely increase the durability of structures mechanically and increase thermal insulation. In this research, the plastic bag segments are integrated in a ratio of 0% to 0.7% in the compressed clay bricks. Which consists of sand, clay, and gypsum. Some physical, mechanical, and thermal properties of the samples are measured. Preliminary results show that the addition of these strips reduces the value of the bulk density between 3.21% to 13%. The speed of sound transmission also decreases between 2.17% and 21%. The stress strength increases between 5.4% to 25.53%. The thermal conductivity value also decreases between 5.26% to 23.68%. This leads to the clay brick becoming lighter, more solid, and better thermal insulation. Thus, we combine the improvement of the properties of clay structures with a significant reduction in environmental impact, inspiring a more sustainable future.

Investigation of the Transfer Radioactive Contamination from the Chernobyl Zone and its Impact on Radiation in the Environment

Vambol Sergij, Alqahtani Fahad M., Dolchinkov Nikolay Todorov, Ilyas Muhammad, Yeremenko Sergiy, Sydorenko Volodymyr, Mishchenko Igor, Melnyk Vladyslav, Dzhulai Oleksandr

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 12

70--84

The study examined the consequences of a forest fire in a radioactively polluted area in the Chernobyl accident zone, namely the transfer of radioactive substances as well as their impact on the environment and radiation situation. The purpose of the study was to develop a mathematical model of the transfer of radioactive substances and a methodology for integrated assessment of the ability of an ecosystem to retain deposited radionuclides. The research methodology is based on existing proven mathematical methods and models, such as the turbulent diffusion model, the Gaussian static model, and the hierarchy analysis method (Thomas L. Saaty method). Models were obtained for the formation of a radioactive smoke cloud and its migration in the atmospheric air, the spread of radioactive aerosols and gas components, taking into account convection, turbulent exchange, humidity, wind strength and direction over the combustion zone. The processes of blowing and fluttering in the wind by the wind as the horizontal migration perturbers of radioisotopes represent a new, still insufficiently studied area of research. Integral indicators for assessing the ability of the natural components of the forest complex to reliably accumulate and retain the radioisotopes that have settled have been determined. It was revealed that the priority factors of impact on the environment and the degree of radioactive contamination are the activity and directions of migration of combustion products, which constitute radioactive contamination.