Mechanical Characteristics and Micro-Mechanism of Modified Dredged Sludge Based on Calcium-Containing Solid Waste Used as Landfill Cover Materials

Article Engineering, Ocean

Effects of fly ash and slag content on the solidification of river-dredged sludge

Feiyu Liu et al.

Summary: This study investigates the solidification effectiveness of different proportions of curing agents on river-dredged sludge. The results show that an optimal combination of curing agents exists, where increasing fly ash and slag content can improve solidification. However, the negative effects of curing agents on sludge should be considered when using industrial waste residue as a curing agent.

MARINE GEORESOURCES & GEOTECHNOLOGY (2021)

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Article Construction & Building Technology

Properties of dredged sludge solidified with alkali-activated slag-based materials and blended with copper slag as fine aggregates of mortars

Zhenzhong Chen et al.

Summary: This study aims to solidify dredged sludge using industrial by-products to develop a high-strength construction material. The reuse of copper slag to replace natural sand further enhances the performance of the material. Adjusting the replacement ratio of copper slag can improve workability and strength.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Article Engineering, Geological

Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash

Jiang-Shan Li et al.

Summary: The study explored the use of ISSA in treating dredged contaminated marine sediments to improve solidification efficiency and reuse the sediments as construction materials. Lime can be used as a replacement for cement to enhance heavy metal immobilization and reduce carbon emissions. Sediment samples treated with lime and ISSA achieved a certain strength after 28 days of curing.

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING (2021)

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Article Green & Sustainable Science & Technology

Assessment of magnesium potassium phosphate cement for waste sludge solidification: Macro- and micro-analysis

Dongxing Wang et al.

Summary: The feasibility and performance of eco-friendly and sustainable magnesium potassium phosphate cement (MKPC) for solidifying urban river sludge are evaluated, showing that an increase in MKPC dosage and curing age enhances compressive strength of solidified samples. The major hydration phase, struvite-k, effectively fills large pores and refines pore structure. Introducing MKPC as a substitute for Portland cement (PC) in sludge solidification shows mechanical, eco-friendly, and cost-efficient benefits.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Construction & Building Technology