Article

Received 15.01.2025

Revised 22.05.2025

Accepted 24.06.2025

Retrieved from Iss. 117, P. 2, 2025

Pages 160 -169

Savenko, V., & Skoropadskyi, V. (2025). PATTERNS AND TRENDS OF THE EFFECT OF FLY ASH ON SOILS. Automobile Roads and Road Construction, (117.2), 160-169. https://doi.org/10.33744/0365-8171-2025-117.2-160-169

PATTERNS AND TRENDS OF THE EFFECT OF FLY ASH ON SOILS

Vyacheslav Savenko Viktor Skoropadskyi

The article examines the potential for the reuse of fly ash from thermal power plants in road construction to promote energy conservation and resource efficiency. The influence of fly ash on the main engineering and geotechnical properties of soils—such as liquid limit, plastic limit, density, optimum moisture content, hydraulic conductivity, penetration resistance, shear strength, and cbr index—has been analyzed. It was found that fly ash can improve the properties of weak clay soils due to its pozzolanic and hydraulic characteristics. The addition of fly ash reduces plasticity, swelling, and water saturation, while increasing compaction and bearing capacity up to a certain optimal content, beyond which the indicators tend to decrease. The optimal amount of fly ash depends on its chemical composition, particle-size distribution, and soil type. The use of fly ash is considered environmentally and economically feasible, as it reduces industrial waste, decreases the consumption of natural materials, and enhances the sustainability of transport structures

fly ash, soil stabilization, road construction, pozzolanic properties, plasticity index, optimum moisture content, physical and mechanical properties, energy efficiency, waste utilization
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https://doi.org/10.33744/0365-8171-2025-117.2-160-169