2026-04-17T03:36:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1961192025-12-04T20:56:34Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Maldonado Alameda, Alex author Giró Paloma, Jessica author Mañosa Bover, Jofre author Formosa Mitjans, Joan author Chimenos Ribera, Josep Ma. author 2023-03-28T17:23:22Z 2023-03-28T17:23:22Z 2021-01-23 2023-03-28T17:23:22Z The potential of the least polluted fraction (from 8 to 30mm) of municipal solid waste incineration (MSWI) weathered bottom ash (WBA) as an alkali-activated cement precursor was evaluated. Alkali-activated WBA binders (AA-WBA) formulations were prepared through alkali-activation of WBA as sole precursor. Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) mixtures with different pH's were used as alkali-activator solution. The effect of alkali-activator solution pH on the final properties was assessed. Results showed the hydrolytic stability of allformulations. The selective chemical extractions and physicochemical characterisation revealed the formation of the C-S-H, C-A-S-H, and (N,C)-A-S-H gels. The promising compressive strength results demonstrated the potential of AA-WBA binders. The increase of pH in the alkali-activated solution promotes the formation of gel reaction products and enhance mechanical properties. This investigation promotes the green cements manufacturing and the use of secondary resources to reduce the impact of natural resources extraction used for the ordinary Portland cement (OPC) production. Incineració Residus Ciment pòrtland Incineration Waste products Portland cement Alkali-activated binders based on the coarse fraction of municipal solid waste incineration bottom ash