Comparative Analysis of Automated Machine Learning and Optimized Conventional Machine Learning for Concrete’s Uniaxial Compressive Strength Prediction

The uniaxial compressive strength (UCS) is a crucial mechanical property influenced by factors such as concrete constituents and curing days. Concrete’s UCS poses significant challenges for accurate estimation. Traditional methods are time‐intensive, expensive, and may struggle to account for the impact of various interacting factors. This study pioneers the application of automated machine learning (AutoML) and conventional ML techniques to unravel the intricate relationships between the UCS and six factors. A robust dataset comprising 844 experimental results was used to train and evaluate the models. The input parameters for the models were: the curing days, amount of plasticizer, and quantity of cement, fine and coarse aggregates (CAs). Among the models assessed, the AutoGluon model stands out for its superior prediction accuracy and result interpretability. AutoGluon showed exceptional performance when the predictions were compared with experimental data. This model yielded the lowest root mean square error (RMSE) of 1.0830 MPa and the highest coefficient of determination (R2) of 0.9493. Analysis of feature importance indicates that curing days of concrete is the most influent