Geochemical tests to study the effects of cement ratio on potassium and TBT leaching and the pH of the marine sediments from the Kattegat Strait, Port of Gothenburg, Sweden

Cement is a key construction material in civil and geotechnical engineering. However, its application for stabilization of marine sediments needs further investigation. This paper tests the effects varied amounts Portland cement added to soil samples on leaching tributyltin (TBT) from contaminated evaluates pH level. Identifying best combinations / slag Kiln Dust (CKD) effective treatment central challenge investigations with major implications dragged coastal sediments. The aims test TBT as well level potassium (K) content samples. Materials included collected seabed Port Gothenburg, Kattegat Strait, southwest Sweden. methodology applied existing specifications Swedish Institute Standards (SIS) geochemical stabilized by cement/slag/CKD. Leaching was examined 2.25, 9 36 days. Variations speed decline were noted depending ratio cement. follows SIS instructions regarding procedure tests: SS-EN 15863. Mixtures pure CKD gave values between 11.5–12 surface experiments. Mixing or lowered range 11–11.5 10–10.5, respectively. affected changed seawater study shows that reduces over time when mobile fraction being washed away replaced other mechanisms processes. Furthermore, models which assessed, there were, average, changes behaviour 9th day during experiment afterwards.