This study investigates the development of a low-alkali eco-friendly solidifying agent (SA) for dredged sludge using cement (C), steel slag powder (SSP), granulated blast-furnace slag (GGBFS), and phosphorus gypsum (PG). First, an orthogonal test design is employed to determine optimal proportions. The impact of material components on the unrestricted compressive strength (UCS), water absorption, pH, and microstructure of the solidified dredging sludge (SDS) is studied across varying initial water contents. Then, key factors affecting UCS development are identified as cement, GGBFS, and curing age. The pH of SDS decreases to 8.5–9.5 at 28 days, attributed to the continuous reduction in alkalinity facilitated by GGBFS reacting with Ca(OH)2. At last, life cycle assessment (LCA) highlights the practical and ecological advantages of ratios C4-G8 and C6-G6. This research contributes valuable insights into the efficient and eco-friendly solidification of dredged sludge.
Experimental Study on Performance of Low Alkali Eco-friendly Dredged Sludge Solidifying Agent
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 28 , 6 ; 2147-2158
2024-06-01
12 pages
Article (Journal)
Electronic Resource
English
Experimental Study on Performance of Low Alkali Eco-friendly Dredged Sludge Solidifying Agent
Springer Verlag | 2024
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