Resistance to acid attack of alkali-activated binders: Simple new techniques to measure susceptibility

Mellado Romero, Ana MaríaMartha Iris Pérez-RamosMonzó Balbuena, José MªBorrachero Rosado, María VictoriaPaya Bernabeu, Jorge Juan2018-04-222018-04-2220170950-0618https://riunet.upv.es/handle/10251/100825[EN] Two rapid tests were developed to evaluate the resistance to acid attack by ordinary Portland cement (OPC) and alkali-activated pastes. Acid neutralisation capacity (ANC) at pH 7, 4 and 2 was monitored with powdered pastes. In parallel, a `combined-pH assay¿ with a single sample was used to sequentially assess ANC at different pH values. A mass loss/consumed acid monitoring technique has been also developed in order to assess monolithic samples. The OPC paste showed the most degradation. Among the alkaliactivated pastes, those with the lowest calcium content (fly ash and spent-FCC catalyst) had the best performance.Reserva de todos los derechosAlkali-activated binderDurabilityAcid attackAcid neutralisation capacityMass lossConsumed acidINGENIERIA DE LA CONSTRUCCIONResistance to acid attack of alkali-activated binders: Simple new techniques to measure susceptibilityArtículo10.1016/j.conbuildmat.2017.05.224Abierto