Multiscale Analysis of Clayey Soil Behavior Stabilized with Wood Ash and Sodium Chloride: Experimental Data, Predictive Models, and Supplementary Tables

This dataset contains experimental and predictive modeling results for clayey soil stabilized with 15% wood ash (WA) and 10% sodium chloride (NaCl). It includes: Raw data: UCS, CBR, compaction, and swelling measurements under wet-dry and freeze-thaw cycles. Processed data: Fused datasets combining experimental and synthetic measurements for machine learning. Notebooks: Data exploration, dataset creation, model training, predictive analysis, and figure generation. Figures: Multiscale mechanistic illustrations, SHAP feature importance, and field validation plots. Supplementary tables: Detailed experimental statistics, model performance, cost, sustainability, and salinity mitigation strategies. This resource enables reproducible research, predictive modeling, and mechanistic understanding of dual-stabilizer performance in clayey soils. Suitable for geotechnical engineers, environmental researchers, and civil infrastructure design.