Evaluating soil strength by geophysical methods using P-waves was undertaken in this study to assess the effects of changed binderratios on stabilization and compression characteristics. The materials included dredged sediments collected in the seabed of Timrå region, northSweden. The Portland cement (Basement CEM II/A-V, SS EN 197-1) and ground granulated blast furnace slag (GGBFS) were used as stabilizers.The experiments were performed on behalf of the Svenska Cellulosa Aktiebolaget (SCA) Biorefinery Östrand AB pulp mill. Quantity of binderincluded 150, 120 and 100 kg. The properties of soil were evaluated after 28, 42, 43, 70, 71 and 85 days of curing using applied geophysicalmethods of measuring the travel time of primary wave propagation. The P-waves were determined to evaluate the strength of stabilized soils.The results demonstrated variation of P-waves velocity depending on stabilizing agent and curing time in various ratios: Low water/High binder(𝐿𝑊 𝐻𝐵), High water/Low binder (𝐻𝑊 𝐿𝐵) and percentage of agents (CEM II/A-V/GGBFS) as 30%/70%, 50%/50% and 70%/30%. Thecompression characteristics of soils were assessed using uniaxial compressive strength (UCS). The P-wave velocities were higher for samplesstabilized with 𝐿𝑊 𝐻𝐵 compared to those with 𝐻𝑊 𝐿𝐵. The primary wave propagation increased over curing time for all stabilized mixes alongwith the increased UCS, which proves a tight correlation with the increased strength of soil solidified by the agents. Increased water ratio givesa lower strength by maintained amount of binder and vice versa.