4. Laboratory testing
In the first phase laboratory experimental testing of properties solidification products (SPs) prepared according
to basic solidification formulas was carried out. Based on the results of this experimental testing three best
formulas (3A, 3B and 7B) were selected, which were then further tested for purpose to their further certification
according to Government Directive No. 163/2002. The composition of three chosen solidification formulas is
shown in the Table 4 below. The demonstration of physical and mechanical requirements was based on the
following tests: Cube compression strength, Bulk density, Laboratory reference density and water content –
Proctor compaction, California bearing ratio (CBR), Permeability - filter coefficient. Ecological requirements that
are specified in the relevant legislation, were assessed by the leachability test, determining the concentration of
pollutants in dry matter, acute toxicity tests and determination of the activity concentration of 226Ra and activity
concentration index.