Print Email Facebook Twitter Pore solution composition of alkali-activated slag/fly ash pastes Title Pore solution composition of alkali-activated slag/fly ash pastes Author Zuo, Y. (TU Delft Materials and Environment) Nedeljković, Marija (TU Delft Materials and Environment) Ye, G. (TU Delft Materials and Environment) Date 2019-01-01 Abstract The pore solutions of a series of hardened alkali-activated slag/fly ash pastes were extracted by the steel-die method, and analyzed using ICP-OES analysis technique. According to the saturation index from thermodynamic calculations, the pore solutions of alkali-activated slag pastes kept oversaturated with respect to solid reaction products with time. In the pore solutions of alkali-activated fly ash pastes, an increase of temperature (from 40 °C to 60 °C) led to decreases of the concentrations of Si, Al, Ca, Na, OH−, K, Fe and Mg, while the soluble silicate in the alkaline activator resulted in increases of the concentrations of these elements. Compared to the alkali-activated slag paste with the same alkaline activator, 50% replacement of slag by fly ash did not result in a substantial change of the pore solution composition. Based on the experimental results, conceptual models were proposed to describe the elemental concentrations in the pore solutions. Subject Alkali activationSlag/fly ashPore solutionSaturation indexConceptual models To reference this document use: http://resolver.tudelft.nl/uuid:f16dd202-e727-4ffa-af68-ccb8afb12ede DOI https://doi.org/10.1016/j.cemconres.2018.10.010 Embargo date 2020-10-30 ISSN 0008-8846 Source Cement and Concrete Research, 115, 230-250 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 Y. Zuo, Marija Nedeljković, G. Ye Files PDF postprint_pore_solution_c ... pastes.pdf 3.87 MB Close viewer /islandora/object/uuid:f16dd202-e727-4ffa-af68-ccb8afb12ede/datastream/OBJ/view