Influence of steel slag powder on the properties of engineered cementitious composites

GAO Jianrong; LI Wenyu; JIANG Yong

doi:10.7513/j.issn.1004-7638.2026.04.022

Volume 47 Issue 4

Aug. 2026

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GAO Jianrong, LI Wenyu, JIANG Yong. Influence of steel slag powder on the properties of engineered cementitious composites[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 189-196. doi: 10.7513/j.issn.1004-7638.2026.04.022

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GAO Jianrong, LI Wenyu, JIANG Yong. Influence of steel slag powder on the properties of engineered cementitious composites[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 189-196. doi: 10.7513/j.issn.1004-7638.2026.04.022

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Influence of steel slag powder on the properties of engineered cementitious composites

doi: 10.7513/j.issn.1004-7638.2026.04.022

GAO Jianrong^1
,,
LI Wenyu¹,
JIANG Yong^{2
,
,}

1.
Department of Materials and Environmental Engineering,Shanxi Polytechnic College,Taiyuan 030000, Shanxi, China
2.
School of Materials Engineering, Mianyan Polytechnic, Mianyang 621000, Sichuan, China

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Received Date: 2026-02-03
Accepted Date: 2026-04-07
Rev Recd Date: 2026-04-01
Publish Date: 2026-08-31

Abstract

Abstract

Engineered cementitious composites (ECC) hold significant application value in structural repair and protection due to their ultra-high ductility, strain-hardening behavior, and excellent durability. To reduce cement consumption and explore alternative materials to fly ash, this study employed ultra-fine steel slag powder (SSP) to progressively replace fly ash in the preparation of polyvinyl alcohol (PVA) fiber-reinforced ECC. The variations in the mechanical properties, microstructure, and hydration characteristics of ECC were systematically investigated. The results indicate that with an increasing SSP replacement ratio, both the flexural and compressive strengths of ECC exhibited an initial increase followed by a subsequent decrease. Notably, the improvement in flexural strength was more significant, with a 38.5% increase observed at a 50% replacement rate compared to the control group. The uniaxial tensile performance was also markedly enhanced; at a 75% replacement rate, the tensile strength and ultimate tensile strain increased by 95.0% and 131.3%, respectively, accompanied by more pronounced multiple-cracking behavior. Microstructural analysis revealed that the micro-filling effect and nucleation role of SSP promoted the uniform formation of hydration products, thereby increasing matrix density and enhancing the fiber-matrix interfacial bond, which consequently improved the macroscopic mechanical performance and tensile ductility. XRD and TG-DSC analysis further confirmed that the incorporation of SSP increased the calcium hydroxide and chemically bound water content in the cementitious system, optimizing the hydration process. This study provides experimental evidence and technical references for the resource utilization of steel slag and the development of high-performance ECC.
- steel slag powder,
- engineered cementitious composites,
- flexural and compressive strength,
- tensile strength,
- tensile ductility,
- hydration products

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References(18)

References

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