20.500.12556/DiRROS-15856 Valorized deinking paper residue as fill material for geotechnical structures This study introduces a novel geotechnical composite material comprising two types of fill material sourced from the paper industry-deinking paper sludge ash (DPSA) and deinking paper sludge (DPS). Five composites with different DPSA and DPS contents were investigated. Two composites were selected for further analyses. The technology and procedure for composite installation were implemented in field tests. The composites with 80% and 70% DPSA exhibited the elasticity required to withstand minor landslide slip deformations, in addition to achieving sufficiently high values of uniaxial compressive strength. The composites had a low maximum dry density value, which led to fewer settlements in the entire support structure. The enhanced shear characteristics can enable the construction of a thinner retaining wall. The delay between preparation and installation of the composites was further investigated. The field tests confirmed that the composites with 80% and 70% DPSA can be installed on the construction site 4 h and even 24 h after mixing. In 2018, a retaining wall structure with 70% DPSA and 30% DPS was successfully implemented near a railway line using conventional technology as followed-up research to the herein presented study. Results have been derived from work performed in the scope of the H2020 Paperchain project in which novel circular economy models centered on the valorization of the waste streams generated by the pulp and paper industry as secondary raw material for several resource-intensive sectors, including the construction sector, have been developed. Environmental benefits are savings in natural raw materials, reduction of landfill disposal as well as CO2 emission reduction. deinking paper sludge ash deinking paper sludge secondary resources fill material geotechnical structure landslide open access pepel iz papirniškega mulja papirniški mulj sekundarni viri zasipni material geotehnična struktura zdrs odprti dostop true false true Nature Publishing Group Angleški jezik Slovenski jezik © The Author(s) 2021 Neznano 2022-11-30 14:37:54 2023-07-04 09:31:03 2023-07-05 03:36:12 0000-00-00 00:00:00 2021 0 0 Nasl. z nasl. zaslona; Opis vira z dne 16. 11. 2021; Št. članka 22363; str. 1-13 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-11-16 620.1/.2 2045-2322 10.1038/s41598-021-01949-1 85169667 https://www.nature.com/articles/s41598-021-01949-1#Sec14 1 d4a9816e-70ab-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20973 RAZ_Fifer_Bizjak_Karmen_2021.pdf RAZ_Fifer_Bizjak_Karmen_2021.pdf 1 4F151796391EBFF05C904307F4C5D984 cec6ac8691e901528bc80b522eb103d7341990b4e66e540305ff30e4962c4152 8eb35c43-9b16-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21434 RAZ_Fifer_Bizjak_Karmen_2021.pdf RAZ_Fifer_Bizjak_Karmen_2021.pdf 1 30797CF589EB50CF6E59659E6D4433A9 fb59cb15e1a12a01dabb93c85b4559c9620265bcb08b0f35f188f8003a8b7370 f1855fd7-1a2b-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22632 Zavod za gradbeništvo Slovenije 0 0 0