Stabilization of river dredged sediments by means of alkali activation technology

Karmen Fifer Bizjak (Avtor), Lea Žibret (Avtor), Mojca Božič (Avtor), Boštjan Gregorc (Avtor), Vilma Ducman (Avtor)

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

jezerski sediment;alkalijsko aktiviran material;žlindra;mehanske lastnosti;stabilizacija zemljine;river sediment;alkali activated materials;ladle slag;fly ash;mechanical strength;soil stabilization;

Podatki

Jezik:	Angleški jezik
Leto izida:	2024
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	ZAG - Zavod za gradbeništvo Slovenije
Založnik:	Springer
UDK:	626/627
COBISS:	206348803
ISSN:	1614-7480
Št. ogledov:	39
Št. prenosov:	4536
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	jezerski sediment;alkalijsko aktiviran material;žlindra;mehanske lastnosti;stabilizacija zemljine;
Strani:	str. 3361–3375
Letnik:	ǂVol. ǂ23
Zvezek:	ǂiss. ǂ12, [article no.] 1325363
Čas izdaje:	2024
DOI:	10.1007/s11368-024-03872-0
ID:	24956223