Istuque, D.Soriano Martinez, LourdesBorrachero Rosado, María VictoriaPaya Bernabeu, Jorge JuanAkasaki, J. L.Melges, J. L. P.Mitsuuchi Tashima, Mauro2022-09-152022-09-152021-090465-2746https://riunet.upv.es/handle/10251/186158[EN] This paper aimed to evaluate the long-term compressive strength development of the sewage sludge ash/metakaolin (SSA/MK)¿based geopolymer. SSA/MK¿based geopolymeric mortars and pastes were produced at 25ºC with different SSA contents (0 - 30 wt.%). Compressive strength tests were run within the 3-720 curing days range. A physicochemical characterisation (X-ray diffraction and scanning electron microscopy) was performed in geopolymeric pastes. All the geopolymeric mortars presented a compressive strength gain with curing time. The mortars with all the SSA evaluated contents (10, 20, 30 wt.%) developed a compressive strength over 40 MPa after 720 curing days at 25ºC. The maximum compressive strength of the mortars with SSA was approximately 61 MPa (10 wt.% of SSA), similarly to the reference mortar (100% MK-based geopolymer). The microstructure analyses showed that the SSA/MK¿based geopolymer presented a dense microstructure with N-A-S-H gel formation.Reconocimiento (by)Alkali-activated cementMetakaolinCompressive strengthMortarScanning electron microscopyINGENIERIA DE LA CONSTRUCCIONArtículo10.3989/mc.2021.13220Abierto09.- Desarrollar infraestructuras resilientes, promover la industrialización inclusiva y sostenible, y fomentar la innovación11.- Conseguir que las ciudades y los asentamientos humanos sean inclusivos, seguros, resilientes y sostenibles