González Corrochano, B.Alonso Azcárate, JacintoRodas González, MagdalenaFernández Barrenechea, José MaríaLuque Del Villar, Francisco Javier2023-06-202023-06-2020110950-061810.1016/j.conbuildmat.2011.03.053https://hdl.handle.net/20.500.14352/42462The microstructure and mineralogy of lightweight aggregates manufactured with washing aggregate sludge, sewage sludge and a clay-rich sediment have been studied. The mineralogical analysis revealed the neo-formation of plagioclase and pyroxene group minerals and a minor presence of gehlenite. Some relationships may be established: (i) heating temperature and dwell time affect the formation of new porosity; (ii) the disappearance of pyroxenes could produce changes in the density of the solid material in the lightweight aggregates; (iii) when an external glassy film is not present, water absorption values depend on the size and number of each type of pore.engjournal articlehttp://www.elsevier.com/wps/product/cws_home/30405/descriptionopen access549.6Lightweight aggregateMicrostructureMineralogyWashing aggregate sludgeSewage sludgeClay-rich sedimentMineralogía (Geología)2506.11 Mineralogía