Study on the Performance of Steel Slag and Its Asphalt Mixture with Oxalic Acid and Water Erosion

Huang, Xiaoming; Yan, Feng; Guo, Rongxin; He, Huan

doi:10.3390/ma15196642

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…With the addition of steel slag, the degree of hydration is weaker, and only partial fibrous and flocculent C-S-H gel is formed in the sample. However, the internal pores are larger, and the framework of the cementitious system is not yet fully interconnected [32]. In Figure 6a, it is evident that in the concrete without steel slag, a large amount of fibrous and flocculent C-S-H gel has already formed at the 3-day age.…”

Section: Impact Of Mechanical Grinding On Phase Compositionmentioning

confidence: 99%

Influence of the Steel Slag Particle Size on the Mechanical Properties and Microstructure of Concrete

Li,

Lu,

Liu

et al. 2024

Sustainability

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The present paper probes into the influence of the steel slag particle size on the mechanical properties and microstructure of concrete, with steel slag serving as the primary raw material. Steel slag with different particle sizes was selected as the partial substitute material for concrete by mechanical grinding. The influence of steel slag on the compressive strength, bending strength, and microstructure of concrete was determined by laser particle size analyzer, specific surface area analyzer, strength experiment, X-ray diffraction (XRD), and scanning electron microscope (SEM). The results show that mechanical grinding has significant effects on the particle size distribution and specific surface area of the steel slag. The optimal grinding time is 20 min and the specific surface area is 0.65 m2/g. D10, D50 and D90 are 0.91 μm, 16.57 μm and 46.40 μm, respectively. The steel slag with a fine particle size can better fill the pores in concrete and improve the compactness, thus enhancing the mechanical properties of concrete. The change in the steel slag particle size does not change the type of hydration products, but the smaller the particle size of steel slag, the better the gelling activity, the larger the hydration products, the denser the structure, and the better the mechanical properties. Therefore, the present study provides an important theoretical basis and practical guidance for the application of steel slag as an additive in the concrete industry.

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Section: Impact Of Mechanical Grinding On Phase Compositionmentioning

confidence: 99%

Influence of the Steel Slag Particle Size on the Mechanical Properties and Microstructure of Concrete

Li,

Lu,

Liu

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…Proper treatment methods must be proposed to solve the problem of water-induced volume expansion of steel slag and evaluate the submersion stability of the treated steel slag and its asphalt mixture. The mechanisms of oxalic acid and water erosion on the performance of steel slag and its asphalt mixture were analyzed by Huang et al [11], and the suitability of steel slag and its mixture treated with oxalic acid was evaluated, providing engineering suggestions and theoretical guidance for the practical application of recycled steel slag in asphalt mixtures. In this study, steel slag was treated with a modified oxalic acid solution to inhibit the swelling and water erosion of steel slag and its asphalt mixture at different times before and after the treatment.…”

mentioning

confidence: 99%