20.500.12556/DiRROS-16325 Clay rich river sediments calcined into precursors for alkali activated materials Alkali activated materials (AAMs), a potential alternative to cement-based products or ceramics, can incorporate large amounts of currently landfilled aluminosilicate rich materials such as calcined clay-rich river sediments collected at hydropower plant dams. Untreated fresh sediment and untreated aged sediment intended to serve as AAM precursors were calcined to increase their amorphous content, then activated by Na or K-based silicate or hydroxide solutions and cured at 60 ◦C for three days. Up to 30 mass % (ma%) of fly ash (FA) or ladle slag (LS) increased the mechanical performance. The phase composition and microstructure are analyzed using X-ray diffraction, fourier-transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and mercury intrusion porosimetry to gain further insight into how the additives influence the final properties of the resulting AAMs. The main crystalline components of the prepared AAMs are quartz, illite/muscovite and feldspar. The amorphous content reaches up to 52.5 ma% in the Na-activated AAMs and up to 48.8 ma% in K-activated AAMs. The acquired results confirm the suitability of the investigated sediments as sole precursors for AAMs. The mechanical properties of the AAMs can be improved by adding FA and/or LS. sediments alkali activated materials properties sedimenti alkalijsko aktivirani materiali lastnosti true false true Elsevier Angleški jezik Slovenski jezik © 2023 The Authors. Published by Elsevier B.V. Neznano 2023-03-01 13:50:02 2023-05-30 13:28:22 2023-06-15 09:52:02 0000-00-00 00:00:00 2023 0 0 str. 1-10 [article no.] 106848 Vol. 234 Mar. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-02-15 620.1/.2 0169-1317 10.1016/j.clay.2023.106848 141839875 https://www.sciencedirect.com/science/article/pii/S0169131723000352?via%3Dihub 1 3428817f-b827-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21801 RAZ_Zibret_Lea_2023.pdf RAZ_Zibret_Lea_2023.pdf 1 7D5D91D89C3FFC67E362AB73FD1A49B5 bde40b4b89aa768a748eb7518233981efa92c8c96fa924591e291f99c07e55e0 4341874d-b828-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21802 RAZ_Zibret_Lea_2023.docx RAZ_Zibret_Lea_2023.docx 1 4E4EA5A45A8E861C4AE8E25C7EE29373 b74bdb41e06372bf967145b45547f3906208c4942bff5de848d3f85609fa9301 4f17e2dd-fecc-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22463 Zavod za gradbeništvo Slovenije 0 0 0