Mechanical properties of steel slag replaced mineral aggregate for road base/sub-base application based Vietnam and Japan standard

Dang, Dang Tung; Nguyen, Manh Tuan; Nguyễn, Tấn Phong; Isawa, Tomoo; Ta, Yasutaka; Satō, Ryōichi

doi:10.1007/s11356-021-16706-0

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…Among the alternatives, it would be essential to identify sustainable materials with low global warming potential and a low environmental footprint, considering the climate change situation. Previous material property investigations in Vietnam have indicated that feasible materials to replace sand in the road construction sector, other than m-sand, include slags [37], ashes [38], and CDW [39,40]. The present study focuses on the environmental footprint and sheds light on the environmental impact of the extraction of primary raw materials in comparison to secondary raw materials as SBMs for the road subbase.…”

Section: Introductionmentioning

confidence: 94%

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Schneider

Mihai

et al. 2023

Applied Sciences

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Road construction usually relies on the utilization of natural aggregates as building materials. However, increasing pressure for sustainable roads highlights the importance of replacing natural materials with industrial byproducts. The scope of the present study was to identify feasible secondary raw materials for road subbase construction, and to investigate their environmental footprint in the context of Vietnam. This work examines road subbase alternatives such as manufactured sand (m-sand), granulated blast furnace slag (GBF), electric arc furnace slag (EAF), construction and demolition waste (CDW), and fly ash (FA). Based on the life-cycle assessment (LCA) approach, the environmental footprints of the alternative waste-based layers were compared with one another and with the corresponding conventional layers. The study comprises following working steps: (i) a comprehensive literature review of the respective materials, (ii) general chemical and soil mechanical analysis of road subbase substitutes, and (iii) LCA of the material alternatives in the context of the Vietnamese road construction sector. The results for the road subbase layer indicated that CDW and FA had lower impacts—particularly in the impact categories global warming potential and mineral resource scarcity. The overall LCA analysis for the road subbase layer highlighted that the greatest footprint contribution was involved in the construction material transportation processes. Thus, sourcing of materials closer to the site or the use of low-emission transport alternatives is needed.

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Section: Introductionmentioning

confidence: 94%

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Schneider

Mihai

et al. 2023

Applied Sciences

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“…A large number of scientific studies have been devoted to the problems of recycling industrial wastes of metallurgical production, including BFS [1][2][3][4][5][6]. A special place among the areas of research in the field of recycling blast-furnace and steel-smelting slags is occupied by the possibility of use these materials in construction and civil engineering [7][8][9][10][11][12][13][14][15][16][17][18][19][20], including production of cement [7][8][9], mortars, slag-alkaline binders [10,11], concrete [12][13][14], fine and coarse aggregates [15][16][17], mineral wool [18], ceramic paving stones [19], geopolymers [20].…”

Section: Introductionmentioning

confidence: 99%

Laboratory evaluation of a complex treatment technology for reducing water absorption of the pavement subbase aggregate from the blast-furnace slag

Kunaev,

Tavshanov,

Asanov

2024

Eng. Res. Express

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When smelting each ton of pig iron, approximately 500 kg of blast-furnace slag is formed and requires recycling. Air-cooled blast-furnace slag can be used for the manufacture of slag aggregate for the pavement subbase layers, as an alternative to natural stone aggregate. The wide use of slag in this area is limited by its high water absorption. This paper proposes a complex technology to reduce water absorption of slag aggregate. This technology includes selective crushing, which allows separating low-porosity aggregate grains from high-porosity ones, and impregnation of selected low-porosity grains with hydrophobic agent (surface hydrophobization). The results of a laboratory evaluation of this technology effectiveness are presented. Article also contains optimal parameters of this complex technological process which allowed to reduce the water absorption of the slag aggregate from 4.54% to 1.05%.

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“…Nickel slag (NS) is a waste product from the nickel industry, which can be incorporated with other natural resources to enhance specific characteristics for various applications. 1 The high magnetite content of NS is the primary reason for its use in the absorption of electromagnetic interference (EMI) emissions, 2 sensors, 3 batteries, 4 alkaline activations, 5 and shielding. 6 Fayalite is a perovskite-type material that can be extracted from NS with useful properties, such as ferromagnetism, ferroelectricity, and superconductivity.…”

Section: Introductionmentioning

confidence: 99%

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

et al. 2023

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Efforts to produce microwave absorber materials that are inexpensive and environmentally friendly have become a means of greening the environment. The breakthrough can be focused on industrial waste and natural materials for functional purposes and how to enhance their performance. We successfully synthesized nickel slag/laterite soil (NS/LS) and nickel slag/iron sand (NS/IS) nanocomposites using a simple mechanical alloying technique, and the electromagnetic (EM) wave absorption capacities of the nanocomposites were measured using a vector network analyzer. The structural properties of the nanocomposites were analyzed by X-ray diffraction spectroscopy, where the results of the analysis showed that NS/IS has the largest crystallite size (15.69 nm) and the highest EM wave absorption performance. The optical properties of the nanocomposites were determined from their Fourier transform infrared spectra using the Kramers–Kronig relation. As determined through a quantitative analysis of the optical properties, the distance between the longitudinal and transversal optical phonon wavenumber positions (Δ(LO – TO) = 65 cm–1) is inversely proportional to the reflection loss. The surface morphologies of the nanocomposites were analyzed by scanning electron microscopy, and the particle diameters were observed by binary image and Gaussian distribution analyses. The nanocomposite surface exhibits a graded-like morphology, which indicates multiple reflections of the EM radiation, consequently reducing the EM interference. The best nanocomposite for an attenuated EM wave achieved a reflection loss of −39.14 dB at 5–8 GHz. A low penetration depth has implications for the electrical charge tuning of the storage and composite magnets. Finally, the EM absorption properties of NS/IS and NS/LS indicate a 2-mm-thick environmentally friendly nanocomposite for EM absorption.

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Mechanical properties of steel slag replaced mineral aggregate for road base/sub-base application based Vietnam and Japan standard

Cited by 10 publications

References 5 publications

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Laboratory evaluation of a complex treatment technology for reducing water absorption of the pavement subbase aggregate from the blast-furnace slag

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

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