RESEARCH ON THE INFLUENCE OF MINERAL OILS ON THE STRENGTH AND AVERAGE DENSITY OF HEAVY CONCRETE
DOI:
https://doi.org/10.31650/2786-6696-2025-14-78-85Keywords:
heavy concrete, mineral oils, concrete strength, concrete average density, mechanical properties of concrete.Abstract
The article investigates the effect of mineral oils on the strength and volumetric weight of heavy concrete. Heavy concrete is the main material in construction, used to create structures with increased requirements for strength and stability, however, the effect of chemical agents, such as mineral oils, on its properties remains insufficiently studied. The study of this aspect is important for improving the durability and safety of concrete structures, in particular those exposed to oils in industrial processes or accidents. The aim of the study was to study how different types of mineral oils (transformer oil T-1500, engine oil 10W-40, IGP-30, both new and used) affect the physical and mechanical characteristics of heavy concrete, in particular its strength and volumetric weight. The experiments were carried out on concrete samples measuring 100×100×100 mm, made of Portland cement, under standard storage conditions. Oils were applied by two methods: immersion of samples in oil and application with a brush.
The results of the studies showed that the most significant effect on the strength and volumetric weight of concrete was the method of immersion of samples in new transformer oil T-1500, where after 30 days a significant increase in weight by 1.18% and compressive strength by 13.06% was observed. The use of waste oils and the method of applying oil with a brush led to a decrease in the strength of concrete, in particular, when using waste motor oil 10W-40, the strength decreased by 63.74% on day 30. At the same time, application of oil with a brush caused mainly superficial changes, without significant improvements or even a decrease in the strength of concrete. The results confirmed that the type of oil, its condition and the method of application have a significant effect on the mechanical properties of concrete. The study indicates the importance of choosing methods for protecting concrete structures from the negative effects of chemical agents and opens up prospects for further research in this area, in particular the development of technologies that reduce the impact of mineral oils on the durability and strength of concrete.
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