Abstract
Magnesium potassium phosphate cement (MKPC) plays a significant role as a rapid repair material in road and bridge infrastructure, owing to its fast-setting and high early strength properties. However, its crack resistance and bonding performance still pose challenges, which can impact both the repair effectiveness and the long-term service life of MKPC-based repairs. The addition of steel fibres can improve its strength and toughness. In this paper, the effect of steel fibre dosage on the processing performance and bonding properties of MKPC is investigated. The results show that the flow properties of MKPC remain stable at a dosage of 1%. Meanwhile, mechanical properties are significantly improved, with the flexural strength increasing by 56.39% and compressive strength increasing by 38.81% at this dosage. Additionally, steel fibres enhance the tensile strength of MKPC by effectively bridging cracks and preventing their propagation. After 56 days of immersion in pure water, the specimen with 1% steel fibre content retained 87% of its tensile strength, demonstrating remarkable durability. These findings indicate that steel fibre reinforcement not only improves the mechanical performance of MKPC but also enhances its long-term stability in aqueous environments, making it a promising material for durable infrastructure repairs.
Keywords
magnesium potassium phosphate cement, steel fibre, bonding performance, durability
Date of Version
2025
DOI
10.5703/1288284318208
Recommended Citation
Wang, Zheng; Guan, Yanfeng; Mu, Minghao; Zhu, Hongyue; Yan, Chen; Dong, Zhenwei; and Hou, Pengkun, "Steel Fiber Dosage in Magnesium Potassium Phosphate Cement Effects on Mechanical and Durability Properties" (2025). International Conference on Durability of Concrete Structures. 5.
https://docs.lib.purdue.edu/icdcs/2025/icc/5
Steel Fiber Dosage in Magnesium Potassium Phosphate Cement Effects on Mechanical and Durability Properties
Magnesium potassium phosphate cement (MKPC) plays a significant role as a rapid repair material in road and bridge infrastructure, owing to its fast-setting and high early strength properties. However, its crack resistance and bonding performance still pose challenges, which can impact both the repair effectiveness and the long-term service life of MKPC-based repairs. The addition of steel fibres can improve its strength and toughness. In this paper, the effect of steel fibre dosage on the processing performance and bonding properties of MKPC is investigated. The results show that the flow properties of MKPC remain stable at a dosage of 1%. Meanwhile, mechanical properties are significantly improved, with the flexural strength increasing by 56.39% and compressive strength increasing by 38.81% at this dosage. Additionally, steel fibres enhance the tensile strength of MKPC by effectively bridging cracks and preventing their propagation. After 56 days of immersion in pure water, the specimen with 1% steel fibre content retained 87% of its tensile strength, demonstrating remarkable durability. These findings indicate that steel fibre reinforcement not only improves the mechanical performance of MKPC but also enhances its long-term stability in aqueous environments, making it a promising material for durable infrastructure repairs.
