20.500.12556/DiRROS-21972 Upcycling municipal solid waste incineration bottom ash in clay-bonded bricks There is an increasing concern about the management of municipal solid waste incineration bottom ash (BA), of which approximately 300,000 tons are generated annually in Finland. As an alternative to the landfilling of this waste, which is the most common practice in the industry, this study investigates the feasibility of upcycling BA for clay brick production. Here, kaolinitic and illitic clays were selected as the precursors. Kaolinitic or illitic clays containing 10, 20, and 30 wt% BA and their counterparts without BA were fired at 1000 ◦C. The materials and prepared bricks were characterized using X-ray diffraction, thermogravimetry, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, mass loss, visual appearance, linear shrinkage, water ab- sorption, apparent density, compressive strength, freeze–thaw, and leaching tests. The experimental results show that the incorporation of BA as an admixture positively influenced the properties of illitic clay-based bricks, which exhibited a reduction in cracks, mass loss, and water absorption while having higher apparent density, compressive strength, and residual strength than kaolinitic clay-based bricks. This is mainly ascribed to the difference in their sintering behavior and chemical and mineralogical composition; more notably, it is ascribed to the higher content of alkali oxides (K2O and Na2O) in the illitic clay than in the kaolinitic clay. The water ab- sorption of the bricks varied from 4 % to 25 %, and the compressive strength varied from 12 to 19 MPa depending on the BA content and clay type. Nevertheless, the compressive strength of all bricks satisfied the ASTM C62 standard for bricks subjected to negligible weathering, and the residual strength of some samples after exposure to 50 freeze–thaw cycles demonstrated their resistance to severe weathering. The dual effects of sintering and BA addition resulted in more stable crystalline phases and a densified microstructure. Moreover, the heavy metals in BA were encapsulated in kaolinitic and illitic clay bricks and satisfied EU regulations for inert and nonhazardous materials. municipality incineration ash bricks recycling pepel iz sežigalnic opeke reciklaža true false true Elsevier Angleški jezik Slovenski jezik © 2024 The Authors. Published by Elsevier Ltd. Neznano 2025-04-15 12:22:04 2025-04-15 12:29:46 2025-10-24 03:50:17 0000-00-00 00:00:00 2024 0 0 str. 8941-8954 iss. 7 Vol. 51 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-12-20 620.1/.2 1873-3956 10.1016/j.ceramint.2024.12.324 220286211 https://www.sciencedirect.com/science/article/pii/S0272884224059959 1 7ab6543e-19e3-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=31696 RAZ_Adesoji_Adediran_Adeolu_2024.pdf RAZ_Adesoji_Adediran_Adeolu_2024.pdf 1 CE748D14ECB57C50BE49A6FC40BF2031 abcb9ef15ffa8e099b4ed06b63943f8d3e6ba4020d8359c002d2d3d929b9e776 6edca0b0-19e4-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=31700 Zavod za gradbeništvo Slovenije 0 0 0