From sunflower seeds to olives. Yes, olives. University of Granada researchers have successfully manufactured self-compacting concrete using ash from the combustion of olive pruning residue pellets. In an article published in Construction and Building Materials, the researchers present preliminary results on the use of fly ash, produced in domestic boiler combustion of biomass olive residue pellets, as a substitute for filler in the manufacture of self-compacting concrete. The concrete produced has a compression strength slightly higher than that of conventional concrete and over the minimum required by Spanish Structural Concrete Code EHE-08 (Real Decreto 1247/2008, de 18 de julio).