compressive strength flexural strength Adaptive boosting 1 Bending strength 1 Compressive and flexural strengths 1 Compressive strength 1 Concrete aggregates 1 Cost effective 1 Cost effectiveness 1 Decision trees 1 Error values 1 Errors 1 Gradient boosting 1 Machine learning 1 Machine-learning 1 Mean absolute error 1 Mean square error 1 Random forest modeling 1 Random forests 1 Recycled aggregate concrete 1 Recycling 1 Sustainable aggregate 1 Water absorption 1 fly ash 1 gradient boosting 1 high-performance concrete 1 random forest 1 recycled aggregate concrete 1 silica fume 1 splitting tensile 1