mortars made with recycled aggregate. 2. MATERIALS AND EXPERIMENTAL 2.1. Materials Recycled aggregate. The selected concrete rubble (Figure 1) was processed at the C&D waste treatment plant to obtain a recycled aggregate with a particle size of under 5 mm (Figure 2). Six samples of the selected Figura 1. Escombro de hormigón. Figure 1. Concrete waste. Figura 2.