The use of artificial aggregates manufactured from waste and by-product materials, as an alternative to natural aggregate, has attracted considerable research interest. Extensive research has been conducted to pre-process or pre-treat different source of wastes to be used as raw materials for artificial aggregates (AAs) production. In this experimental work artificial aggregates have been manufactured by means of cold-bonding granulation. Cold-bonding pelletization is carried out through a rotating plate device allowing the formation of pelletized aggregates from waste materials through gravitational and centrifugal forces. In addition to traditional single step cold bonding granulation, a double pelletization was carried out to obtain AAs with improved properties. In the one-step pelletization process the waste is incorporated within the binding matrix, while the two-step procedure involves a second encapsulation to obtain AAs embedded within an outer shell, likely able to improve their physical properties.
Several concrete mixtures were designed by alternatively adding either single-bond or double-bond AAs at different dosages (0% – 10% – 20% and 30% replacement by weight of aggregate). Then, several Artificial Aggregate Concretes (AACs) specimens were manufactured and characterized in terms of fresh and hardened concrete properties. In detail, in addition to fresh consistency tests, density evaluations were carried out at fresh and hardened state; compression, indirect tensile and bending tests were performed at both early age and long term. All AACs, including those prepared with 30% double-bond pelletization aggregates, achieved adequate mechanical performances to be used in structural concretes.
Keywords: Artificial Aggregate Concrete; By-product Reuse; Green Concrete; Recycling; Sustainability; Waste Pelletization; Waste Valorization.
Citation: Corinaldesi, V. et al., (2025). Sustainable Concrete With Artificial Aggregates Coming From Waste Pelletization. Adv Earth & Env Sci; 6(4):1-5. DOI : https://doi.org/10.47485/2766-2624.1080