20.500.12556/DiRROS-16137 Production and characterization of lightweight aggregates from municipal solid waste incineration fly-ash through single- and double-step pelletization process The performance of a cold-bonding pelletization process was investigated for lightweight aggregates (LWAs) production from municipal solid waste incineration (MSWI) fly-ash (FA), by including multiple waste materials in the aggregate mixture. Before pelletization, FA was pre-treated by washing with water, which led to a reduction of chloride (66.79%) and sulphate (25.30%) content. This was further confirmed by XRF and XRD analyses, which showed a reduction of chloride elements and the content of chlorine crystalline phases. The pelletization process was carried out using both single- and double-step methods. For single-step pelletization, all the mixtures contained 80% FA, combined with various compositions of cement (5, 10, and 15%) and granulated blast furnace slag (GBFS) (5, 10, and 15%). For the double-step pelletization 30% of cement and 70% of marble sludge (MS) were added to each of the previous mixtures. The apparent density of all the aggregates varied between 1.60 and 1.87 g cm 3, suggesting their suitability to be classified as LWAs. Aggregates produced from double-step pelletization showed improved characteristics, with water absorption capacity and open porosity generally lower compared to the corresponding aggregates from the single-step pelletization. The best values of compressive (crushing) strength (almost 11 MPa) were observed for double-step pelletization aggregates with initial cement: GBFS mixture of 15%:5%. Results from leaching tests showed an overall significant release of chloride and sulphate. Nevertheless, leaching from double-step pelletization aggregates was reduced by 1.73- 4.02 times for chloride and 1.58-5.67 times for sulphate, further suggesting that better performances are achievable through the addition of an aggregate second layer. MSWI fly ash lightweight aggregate microtomography open access MSWI pepel lahki agregat mikrotomografija odprti dostop true false true Elsevier Angleški jezik Slovenski jezik © 2022 The Authors. Published by Elsevier Ltd. Neznano 2023-01-26 06:48:55 2023-05-03 12:40:25 2023-05-04 03:36:09 0000-00-00 00:00:00 2023 0 0 Nasl. z nasl. zaslona; Opis vira z dne 13. 12. 2022; Št. članka: 135275; str. 1-11 Vol. 383 10 Jan. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-11-26 620.1/.2 1879-1786 10.1016/j.jclepro.2022.135275 133711363 https://www.sciencedirect.com/science/article/pii/S0959652622048491?via%3Dihub 1 216e8365-9d3d-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21496 RAZ_Ferraro_Alberto_2023.pdf RAZ_Ferraro_Alberto_2023.pdf 1 24CD86C2441569F809FD66D9907AEC74 16d456b537b7dfbac9e3bd7d9b2e0d4c547be1716b8049a5a179cbb2efa32ecf d57bdb7d-9d3d-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21497 RAZ_Ferraro_Alberto_2023.pdf RAZ_Ferraro_Alberto_2023.pdf 1 2F60FC7002DB6F9098EAAB859040F1B0 f69d11b1c89ad6e54a50a62deb6970f0f6e2b5c62bbf60da30c15b831a54453f 96836b30-e98a-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22227 RAZ_Ferraro_Alberto_2023.pdf RAZ_Ferraro_Alberto_2023.pdf 1 65AE3FB80CC4B6A9521CD5FEDE0339A1 306ab774de97ffa80372a2b4d36b9816b1be4f5b612e6cc578c218c7f6ff794b 9c29d119-e98a-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22228 Zavod za gradbeništvo Slovenije 0 0 0