Odbudowa wilgotności naturalnej w iłach ekspansywnych po usunięciu grupy topoli na przykładzie badań poligonowych

The investigations presented in this paper concern the natural water content changes in expansive clay, caused by group of deciduous trees. The research work was conducted in experimental field of the Geotechnics Dept, of University of Technology and Agriculture in Bydgoszcz. The process of renovation of natural water content in background during few years after trees removing. Analytical characteristic of water content redistribution vs. depth and time was also studied as well as geotechnical expansive soil properties.