Activation of low-activity calcium silicate in converter steelmaking slag based on synergy of multiple solid wastes in cementitious material

Article Engineering, Multidisciplinary

Shrinkage mitigation, strength enhancement and microstructure improvement of alkali-activated slag/fly ash binders by ultrafine waste concrete powder

Guangwei Liang et al.

Summary: This study investigates the reuse of waste concrete powder in alkali-activated binders and finds that the addition of ultrafine waste concrete powder can enhance the mechanical properties and mitigate the shrinkage behaviors of AAB.

COMPOSITES PART B-ENGINEERING (2022)

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Article Green & Sustainable Science & Technology

Utilization of super-hydrophobic steel slag in mortar to improve water repellency and corrosion resistance

Zengqin Shi et al.

Summary: This study proposes an environmentally friendly method of incorporating super-hydrophobic modified steel slag into cement-based materials to enhance water resistance and corrosion resistance. The results show that adding super-hydrophobic steel slag reduces the wettability and water absorption of the cement mortar, improves its mechanical strengths, and enhances its corrosion resistance.

JOURNAL OF CLEANER PRODUCTION (2022)

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Review Engineering, Environmental

Mechanism, application, influencing factors and environmental benefit assessment of steel slag in removing pollutants from water: A review

Chunhong Shi et al.

Summary: This paper reviews the potential of steel slag as a low-cost adsorbent for removing pollutants in water. The results demonstrate that steel slag can effectively remove inorganic nonmetallic ions, heavy metal ions, organic dyes, and other pollutants from wastewater. The effects of modified steel slag and reconstituted steel slag were also explored.

JOURNAL OF WATER PROCESS ENGINEERING (2022)

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Article Construction & Building Technology

Circulating fluidized bed fly ash-blast furnace slag based cementitious materials: Hydration behaviors and performance

Wei Zhang et al.

Summary: This study aims to increase the utilization ratio of circulating fluidized bed fly ash (CFA) in cementitious materials and reduce environmental pollution. By increasing the proportion of CFA and reducing the cement clinker content in CFA-based cementitious materials, good performance development and low concentrations of heavy metal leaching can be achieved.

CONSTRUCTION AND BUILDING MATERIALS (2022)

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Article Soil Science

Effects of fly ash and steel slag on cadmium and arsenic accumulation in rice grains and soil health: A field study over four crop seasons in Guangdong, China

Yihan Chi et al.

Summary: The study showed that steel slag and fly ash significantly reduced Cd, As, and inorganic As concentrations in rice grains, with the effectiveness influenced by soil pH; steel slag had a more persistent effect on reducing grain Cd compared to fly ash, but the reduction of grain As depended on rice cultivars.

GEODERMA (2022)

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Review Materials Science, Multidisciplinary

Mechanical, expansion and rheological properties of circulating fluidized bed fly ash based ecological cement: A critical review

Wei Zhang et al.

Summary: This article reviews the application and performance research progress of CFBFA in ecological cement, and proposes solutions to the problem of over-expansion of f-CaO. Future research should focus on the environmental performance and sustainability of CEC.

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS (2022)

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Article Green & Sustainable Science & Technology

Benefits of using steel slag in cement clinker production for environmental conservation and economic revenue generation

Tianming Gao et al.

Summary: This study examines the feasibility and advantages of using steel slag instead of iron ore in cement production, highlighting the maximum substitution amount and specific resources, as well as the environmental and economic benefits. By optimizing raw meal quality indices and operational processes, it is possible to produce steel slag clinker that meets national standards.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Green & Sustainable Science & Technology

Catalytic pyrolysis of biomass impregnated with elements from steelmaking slag leaching and simultaneous fabrication of phosphorus adsorbent

Tao Kan et al.

Summary: This study proposed a novel strategy for reusing steelmaking slag to treat biomass and produce valuable products. The slag elements acted as catalysts for upgrading the bio-oil quality and as an adsorbent for phosphorus removal from wastewater. X-ray powder diffraction analysis showed the presence of nano-size calcite particles on the products from different pyrolysis temperatures.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Construction & Building Technology

Inhibition mechanisms of steel slag on the early-age hydration of cement

Shiyu Zhuang et al.

Summary: Steel slag inhibits the early-age hydration of cement by slowing the depletion of gypsum, reducing the formation of ettringite, and significantly inhibiting the precipitation of CH and C-S-H.

CEMENT AND CONCRETE RESEARCH (2021)

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Article Chemistry, Physical

Circulating Fluidized Bed Fly Ash Mixed Functional Cementitious Materials: Shrinkage Compensation of f-CaO, Autoclaved Hydration Characteristics and Environmental Performance

Wei Zhang et al.

Summary: This study explores the use of CFB fly ash in cementitious materials, with the addition of CFBFA improving the long-term volume stability of CMM. Sample CMM0.5 shows the highest compressive strength and lowest expansion rate under both standard and autoclaved conditions. The main hydration products in CMM0.5 are C-S-H gel, C-A-S-H gel, and Ca(OH)2.

MATERIALS (2021)

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Article Construction & Building Technology

Functionalized PP fiber to improve compressive strength and solidification/stabilization performance of cement with heavy metals

Dezhi Zhao et al.

Summary: A functionalized PP fiber (AM-PP) was prepared and used with cement to solidify hazardous solid wastes. The addition of AM-PP improved compressive strength of cement samples containing heavy metals and reduced the adverse effect of heavy metals on cement hydration. More hydration products were generated with the addition of AM-PP, especially in early age, leading to lower leaching of Cu2+, Zn2+, and Pb2+ from cement samples.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Review Engineering, Environmental

Applications of red mud as an environmental remediation material: A review

Mengfan Wang et al.

Summary: Red mud is an alkaline by-product from alumina plants, and various waste treatment methods utilizing red mud as an environmental remediation material have been developed. RM-ERMs can be used for purifying waste water, waste gas, and soil, providing an opportunity to improve the environment through purification technologies.

JOURNAL OF HAZARDOUS MATERIALS (2021)

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Article Engineering, Environmental

Binary reaction behaviors of red mud based cementitious material: Hydration characteristics and Na plus utilization

Wei Zhang et al.

Summary: The study found that the RMC composed of RM and OPC has high compressive strength and Na+ consolidation rate, with the binary reaction playing a promoting role in its mechanical properties. By optimizing the material composition ratio and process conditions, the mechanical performance and Na+ resistance of RMC materials can be improved.

JOURNAL OF HAZARDOUS MATERIALS (2021)

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Article Construction & Building Technology

Utilization of ladle furnace slag as cement partial replacement: Influences on the hydration and hardening properties of cement

Kuizhen Fang et al.

Summary: The study found that using LFS as a supplementary cementitious material can significantly accelerate the setting of cement and achieve good performance at low dosages.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Article Green & Sustainable Science & Technology

Circulating fluidized bed fly ash based multi-solid wastes road base materials: Hydration characteristics and utilization of SO3 and f -CaO

Wei Zhang et al.

Summary: The study found that road base materials composed of circulating fluidized bed fly ash and Bayer red mud performed well in improving durability, achieving the required compressive strength. The prepared CRM showed good volume stability and improvements in UCS and durability through the synergistic effect between specific materials. The research also demonstrated the microstructure and hydration gel products of CRM, showing their positive role in enhancing material performance.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Construction & Building Technology