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Abstract

Alkali-Activated Materials (AAM) are considered an alternative to cementitious binders. Due to the reduction of Portland cement content and using industrial wastes to produce it, AAMs gained the researcher's interest in the last decades. Current researches show that mechanical properties and ability to ensure proper conditions for reinforcing steel of AAMs are at least as good as for Ordinary Portland Cement (OPC) concrete. However, environmental aggression affects the durability of AAMs in a different way than OPC. For this reason, there is a necessity to develop the available testing methods dedicated to cement concrete and adjust them to a new type of binder. One of the aggressive environments is a marine zone, where the chloride ions affect the properties of structures. In this paper, the comparison of results obtained from chloride penetration tests conducted on three Alkali-Activated Concrete (AAC) mixtures will be presented. The binders’ precursors are the blends of Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBFS) in slag proportions: 5%, 20%, and 35% expressed by the mass of FA. Materials are denominated AAC5, AAC20, and AAC35, respectively. Chloride penetration tests were conducted using the modified NT BUILD 492 rapid migration test, and reference ASTM C1556 chloride diffusion test. The correlation of results shows the necessity of applying the adjustments to the rapid migration test for AACs. In both tests, the positive influence of increasing slag content was determined. The possible reasons for the observed tendencies are presented and explained.

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Funding

This work has been supported by the National Centre for Research and Development in Poland in the framework of the project SMART-G Smart geopolymers (ERA-MIN2-3/SMART-G/1/2022).

This work has been supported in a part by the National Centre for Research and Development in Poland in the framework of the project GEOSUMAT - Materials for circular economy (M-ERA.NET3/2021/70/GEOSUMAT/2022).

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Correspondence to Patrycja Duzy .

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Duzy, P., Hager, I., Choińska, M., Amiri, O. (2023). Correlation Between Chloride Ions’ Migration and Diffusion Coefficients of Alkali-Activated Concrete. In: Jędrzejewska, A., Kanavaris, F., Azenha, M., Benboudjema, F., Schlicke, D. (eds) International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures. SynerCrete 2023. RILEM Bookseries, vol 44. Springer, Cham. https://doi.org/10.1007/978-3-031-33187-9_112

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  • DOI: https://doi.org/10.1007/978-3-031-33187-9_112

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