The report discusses how adding lime to clay till can improve its compaction properties. By replacing existing ions around clay particles with calcium ions through lime addition, the soil becomes more packable. Tests conducted in Lund, Sweden showed that a lime content of 1.0% resulted in a smaller spread of porosity compared to 0.5%. The key factor in lime modification is the moisture content, with an optimum level needed for effective compaction. Adding water before mixing lime can make the process easier. Overall, lime modification is an effective method for enhancing clay till in construction projects.