Blast furnaces 1 Compressive strength 1 Compressive strength of concrete 1 Concretes 1 Decision trees 1 Eco-friendly 1 Eco-friendly concrete 1 Forecasting 1 Ground granulated blast furnace slag 1 Ground granulated blast-furnace slag 1 Learning algorithms 1 Machine learning 1 Machine-learning 1 Mean square error 1 Multivariate Adaptive Regression Splines (MARS) 1 Multivariate adaptive regression spline 1 Multivariate adaptive regression splines 1 Multivariate adaptive regression splines models Recycled concrete aggregate 1 Recycled concrete aggregates 1 Recycling 1 Regression analysis 1 Slags 1 Support vector machines 1 Training sets 1