Advanced machine learning techniques for predicting compressive strength of ultra-high performance concrete
Arslan Qayyum KHAN , Syed Ghulam MUHAMMAD , Ali RAZA , Preeda CHAIMAHAWAN , Amorn PIMANMAS
Front. Struct. Civ. Eng. ›› 2025, Vol. 19 ›› Issue (4) : 503 -523.
Advanced machine learning techniques for predicting compressive strength of ultra-high performance concrete
This study presents a robust framework for predicting the compressive strength of ultra-high performance concrete (UHPC) using machine learning models, based on a comprehensive data set of 761 data points derived from various UHPC mix designs. Six models, including K-Nearest Neighbors (KNN), Gradient Boosting Regression (GBR), Random Forest Regression (RFR), Support Vector Regression (SVR), Stacking and eXtreme Gradient Boosting (XGBoost), were evaluated. Among them, XGBoost demonstrated the best prediction accuracy, achieving a coefficient of determination (R2) of 0.969 and a root mean square error (RMSE) of 4.626 MPa, outperforming the other models. The Stacking model also performed well with an R2 of 0.960, though it slightly overestimated at higher compressive strength levels. SHapley Additive exPlanations (SHAP) analysis revealed that curing time, silica fume, and aggregate content were the most significant factors influencing compressive strength. Curing time emerged as the dominant factor, significantly surpassing other variables such as silica fume and aggregate content in its impact on compressive strength. This dominance is attributed to its critical role in hydration and compressive strength development, while silica fume and aggregates primarily contributed by enhancing matrix densification and structural integrity. SHAP feature dependency analysis further highlighted complex interactions, particularly between water content and superplasticizer dosage, affecting workability and compressive strength.
ultra-high performance concrete / compressive strength / machine learning / SHAP / prediction
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Higher Education Press
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