Analysis of industrial floor damege and deformation on a expansive slag

The paper discusses an industrial floor that was constructed on a reactive slag subbase. Five years after completion, the user reported damage caused by floor displacement. Cracks and scratches were observed in the finishing layers, particularly at the connection between the partition walls and the floor. Geotechnical and surveying investigations were carried out to determine the cause of the damage. The investigations revealed the presence of reactive slag as the subbase layer. Floor displacement measurements were taken over a four-year period, from November 2019 to November 2023. Despite being ten years since construction, uplift continues to occur. The average annual increase in displacement for the entire floor over the past three years is 6 mm, with a maximum displacement of 80 mm at the midpoint of the floor. The ongoing increase in displacement and damage makes repairing the building and maintaining its use impossible. Microscopic examinations and geodetic measurements do not indicate a stopping of the expansion processes of the subbase.