Stabilization of Soft Soil by a Sustainable Binder Comprises Ground Granulated Blast Slag (GGBS) and Cement Kiln Dust (CKD)

Due to its significant deficiencies such as low permeability, bearing and shear strength, excessive compressibility, soft soil is one of the most problematic types in civil engineering stabilization can be considered a suitable technique for pavements. This study investigates use ground granulated blast slag (GGBS) cement kiln dust (CKD) stabilizers soil. Thus, this involves two optimization stages; first stage, GGBS was incorporated into 0%, 3%, 6%, 9%, 12% by weight obtain optimal percentage, which 6%. Then, blended with CKD binary system at 25%, 50%, 75%, 100% dry The testing program used paper Atterberg limits compaction parameters investigate physical properties unconfined compressive strength (USC) 7 28 days examine mechanical characteristics. In addition, microstructures specimens were tested using scanning electron microscopy (SEM). findings reveal that enhanced optimum binder achieved 6% (25% 75% CKD), generates an increase about 3.3 times days, 5.5 comparison untreated enhancement attributed formation hydration products approved SEM. Consequently, case subgrade soils, pavement’s capacity performance.