Experimental and Modeling Data for the Shear Strength of Xanthan Gum- and Carrageenan-Treated Clayey Sand

This dataset supports the study entitled “Experimental Assessment and Explainable Artificial Neural Network–Harris Hawks Optimization Prediction of Shear Strength Behavior in Xanthan Gum- and Carrageenan-Treated Clayey Sand.” It contains the experimental direct shear test data and the input–output dataset used for predictive modeling. The investigated variables include biopolymer type, curing time, biopolymer dosage, normal stress, and measured shear strength. The data cover xanthan gum- and carrageenan-treated clayey sand specimens tested at biopolymer dosages of 0%, 1%, 2%, and 4%, normal stresses of 25, 50, and 100 kPa, and curing periods of 0, 7, and 28 days. The dataset is provided to support the reproducibility, verification, and further analysis of the experimental and modeling results reported in the associated article.