20.500.12556/DiRROS-16811 Evaluation of locally available amorphous waste materials as a source for alternative alkali activators The production of alkali-activated materials with excellent mechanical performance requires the use of waterglass, which has a significant carbon footprint. Such materials can have a lower carbon footprint if we replace water glass with alternative activators sourced from waste. In this study, we assessed the suitability of locally available amorphous waste materials (stone wool, glass wool, bottle glass and cathode-ray tube glass) as a source for the preparation of alternative alkali activators. We quantified the amount of silicon and aluminium dissolved in the activator solutions via inductively coupled plasma-optical emission spectrometry. The alternative activators were then used to produce alkali-activated fly ash and slag. The compressive strength values of alkali-activated fly ash specimens upon the addition of NaOH, water glass and the most promising alternative activator were 38.98 MPa, 31.34 MPa and 40.37 MPa, respectively. The compressive strength of slag specimens activated with alternative activators with the highest concentration of dissolved silicon (21 g/L) was, however, 70% higher than the compressive strength of slag specimens activated with only 10 M sodium hydroxide. The compressive strength of slag specimens with the addition of the most promising alternative activator was significantly lower (3.5 MPa) than the compressive strength of those that had been activated by commercial water glass (34.3 MPa). alkalijsko aktivirani materiali alternativni aktivatorji lastnosti alkali activated materials/geopolimers alternative activators properties true false true Ceramurgica s.p.a. Angleški jezik Ni določen © 2020 The Authors. Published by Elsevier Ltd. Neznano 2023-08-22 08:58:11 2023-08-22 09:04:16 2023-08-23 03:35:10 0000-00-00 00:00:00 2021 0 0 E-članek objavljen: 15 February 2021; str. 4864-4873 iss. 4 Vol. 47 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-10-09 620.1/.2 0272-8842 10.1016/j.ceramint.2020.10.059 32752643 https://www.sciencedirect.com/science/article/pii/S0272884220330996?via%3Dihub 1 7da4cdb3-40a8-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22854 RAZ_Koenig_Katja_2021.pdf RAZ_Koenig_Katja_2021.pdf 1 B99C88D750B5AB32B3090701AD13068A 269e2d751f4a2a5acf69d145c1f09f243a82dfd88b642ed11bf8e2bed803726c 4f5d1e00-40a9-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22855 Zavod za gradbeništvo Slovenije 0 0 0