Experimental Research on the Mechanical Properties of Steel Fiber-Reinforced Concrete Under Freeze-Thaw Cycles

LIN Yongjun; JIANG Sihua; GUO Song; SUN Liwen

doi:10.3724/j.gyjzG25061306

Volume 55 Issue 10

Oct. 2025

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LIN Yongjun, JIANG Sihua, GUO Song, SUN Liwen. Experimental Research on the Mechanical Properties of Steel Fiber-Reinforced Concrete Under Freeze-Thaw Cycles[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 73-85. doi: 10.3724/j.gyjzG25061306

Citation:

LIN Yongjun, JIANG Sihua, GUO Song, SUN Liwen. Experimental Research on the Mechanical Properties of Steel Fiber-Reinforced Concrete Under Freeze-Thaw Cycles[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 73-85. doi: 10.3724/j.gyjzG25061306

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Experimental Research on the Mechanical Properties of Steel Fiber-Reinforced Concrete Under Freeze-Thaw Cycles

doi: 10.3724/j.gyjzG25061306

School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2025-06-13
Publish Date: 2025-10-31

Abstract

Abstract

Freeze-thaw （F-T） resistance tests were conducted on eight groups of steel fiber-reinforced concrete （SFRC） with different strength grades. The effects of concrete strength and the number of F-T cycles on the compressive strength， mass loss rate， relative dynamic elastic modulus （RDEM）， and microstructural evolution of SFRC were investigated. An F-T damage model based on RDEM was established， and the service life of SFRC in typical cold regions was predicted. The results indicated that low-strength SFRC （C30， C40） exhibited significant F-T damage， with pronounced surface spalling， exposed aggregates， and through-thickness microcracking. After 125 F-T cycles， the compressive strength loss rates reached 35.02% and 31.65%， respectively. In contrast， high-strength SFRC （C50， C60） maintained better integrity， with strength loss rates below 9.61%. Mass loss and RDEM degradation increased progressively with F-T cycles， while high-strength SFRC demonstrated superior F-T resistance. Scanning electron microscopy revealed denser matrix structures in high-strength SFRC compared to low-strength specimens. The RDEM-based damage model achieved a coefficient of determination （R²） exceeding 0.994， accurately capturing the evolution of mechanical properties in SFRC under F-T cycles. Service life predictions suggest that C60 SFRC can achieve a maximum service life of up to 19.7 years in cold regions.
- freeze-thaw cycles,
- steel fiber-reinforced concrete,
- mechanical properties,
- microstructure,
- damage attenuation model,
- service life prediction

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References(31)

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