Optimizing the Concrete Mixture made with Recycled Aggregate Using Experiment Design

The paper presents the optimization of concrete mixtures made with recycled aggregate. The optimization is defined regarding the concrete properties that could be modeled as second-order functions using response surface method and corresponding experiment designs. Three-level full factorial and fractional factorial designs were compared, as well as central composite designs and Box-Behnken design, regarding the needed number of experiments, i.e. the economic and time constraints.