20.500.12556/DiRROS-15830 The preparation and characterization of low-temperature foams based on the alkali activation of waste stone wool Waste mineral wool represents a huge amount of construction and demolition waste that is still not adequately returned into the value chain but needs to be landfilled. In the present study, waste stone wool (SW) was evaluated for the preparation of alkali-activated foams. For this purpose SW was milled and sieved below 63 μm, then the activator (sodium silicate) and different amounts of foaming agent (hydrogen peroxide, H2O2), varying between 1 wt% and 3 wt%, were added to the slurry and cured in moulds at an elevated temperature (70 ◦ C) for three days. In this way, foamed, highly porous materials were obtained whose density and mechanical properties were influenced by the amount of foaming agent used. The densities obtained ranged between 1.4 and 0.5 g/cm3, with corresponding mechanical properties of between 12.6 and 1.5 MPa and total porosities in the range 37.8–78.6%, respectively. In the most porous samples with the total porosity of 78.6%, a thermal conductivity of 0.092 W/(m∙K) was confirmed. The study confirmed the suitability of waste mineral wool (in our case SW) as a precursor for alkali-activated foams with potential use in the construction sector or other industrial applications. alkali activation waste mineral wool mechanical strength open access alkalijska aktivacija odpadna volna SEM XRF XRD mehanska trdnost odprti dostop true false true Ceramurgica s.p.a. Angleški jezik Ni določen © 2022 The Author(s). Published by Elsevier Ltd Neznano 2022-11-23 12:17:54 2023-06-19 06:19:34 2023-06-20 03:42:25 0000-00-00 00:00:00 2022 0 0 str. 1-38 Mar. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-03-11 620.1/.2 0272-8842 10.1016/j.ceramint.2022.03.037 100944387 https://www.sciencedirect.com/science/article/pii/S0272884222007830?via%3Dihub 1 26c2e8e1-6b18-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20939 RAZ_Pavlin_Majda_2022.pdf RAZ_Pavlin_Majda_2022.pdf 1 FCC605EC914C240D862447F38F39D072 6333c597d88e76e5053da7ee3bf14119e45ef27b1025c00a4f1f73342297a39e 058de301-8b3b-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21197 Zavod za gradbeništvo Slovenije 0 0 0