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Stabilization of river dredged sediments by means of alkali activation technologyKarmen Fifer Bizjak,
Lea Žibret,
Mojca Božič,
Boštjan Gregorc,
Vilma Ducman, 2024, izvirni znanstveni članek
Povzetek: Purpose
Alkali activation process has been applied to fresh river clay-rich sediments in order to increase their mechanical properties and make them suitable for soil stabilization.
Materials and methods
Dredged sediments were mixed with up to 30 mass percent (ma%) of fly ash (FA) or ladle slag (LS) and after curing for 3 days at 60 °C, the bending and compressive strength have been determined. The mixtures which exhibited the highest strengths were further optimized for being used in soil stabilization. For this purpose, the sediment was stabilized with 4 ma% of quicklime (QL) and after 1 h 30 ma% of FA with alkali activator was added and cured for 1, 7 and 28 days.
Results
The stabilized sediment has a significantely better geomechanical performance in comparison with the sediment alone. Stabilizing the dredged sediment using alkali activation technology provides high enough strengths to eventually make it suitable for anti-flood embankments.
Conclusions
The results confirmed the suitability of the investigated technology for soil stabilization.
Ključne besede: river sediment, alkali activated materials, ladle slag, fly ash, mechanical strength, soil stabilization
Objavljeno v DiRROS: 09.09.2024; Ogledov: 318; Prenosov: 4723
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