Research on the effect of refined steel slag waste on the electrical properties of conductive asphalt mixtures

LUAN Liqiang; SHI Yunsheng; CHEN Yaopeng; LI Xiaolong

doi:10.7513/j.issn.1004-7638.2026.01.012

Volume 47 Issue 1

Feb. 2026

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LUAN Liqiang, SHI Yunsheng, CHEN Yaopeng, LI Xiaolong. Research on the effect of refined steel slag waste on the electrical properties of conductive asphalt mixtures[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 102-111. doi: 10.7513/j.issn.1004-7638.2026.01.012

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LUAN Liqiang, SHI Yunsheng, CHEN Yaopeng, LI Xiaolong. Research on the effect of refined steel slag waste on the electrical properties of conductive asphalt mixtures[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 102-111. doi: 10.7513/j.issn.1004-7638.2026.01.012

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Research on the effect of refined steel slag waste on the electrical properties of conductive asphalt mixtures

doi: 10.7513/j.issn.1004-7638.2026.01.012

LUAN Liqiang^{1, 2
,},
SHI Yunsheng^{1, 2},
CHEN Yaopeng^{1, 2},
LI Xiaolong^{1, 2}

1.
Guangxi Key Laboratory of Green Building Materials and Construction Industrialization, Guilin University of Technology, Guilin 541004, Guangxi, China
2.
Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China.

More Information

Received Date: 2025-07-21
Accepted Date: 2025-08-15
Rev Recd Date: 2025-08-02

Available Online: 2026-02-25

Publish Date: 2026-02-25

Abstract

Abstract

To address the issue of insufficient resistivity stability in conductive asphalt mixtures under temperature variations, loading, and microcrack damage, which affects snow/ice melting efficiency, conductive refined waste steel slag was introduced. Carbon fiber-reinforced conductive asphalt mixtures with varying replacement ratios of fine steel slag were prepared to investigate the changes in electrical properties under thermosensitive and pressure sensitive effect as well as microcrack damage. The conductive mechanism was analyzed at the microscopic level. The results indicate: ①Fine steel slag effectively suppresses the rapid resistivity increase caused by the Positive Temperature Coefficient（PTC）effect in subzero environments, with a maximum suppression level of 54%. ②Under 10 cycles of standard axle loading, the number of resistivity spike fluctuations gradually decreases to zero as the replacement ratio of fine steel slag increases. When the replacement ratio of steel slag aggregate reaches 75%, a stable composite conductive network forms in synergy with 0.3% carbon fiber. The uniform distribution of steel slag significantly stabilizes and mitigates abnormal resistivity spikes in conductive asphalt mixtures. ③Under three types of prefabricated microcracks （1 mm microcracks, 2 mm macrocracks, and damage-induced cracks）, the replacement ratio of fine steel slag exhibits a negative correlation with resistivity growth rate and a positive correlation with healing-induced resistivity recovery rate. At the 100% steel slag replacement ratio under damage-induced cracking, the resistivity growth rate before crack healing was 42.6%, while the post-healing recovery rate reached 96.2%. Compared to the control group, it represents an effective reduction of 0.19 in resistivity growth rate and an improvement of 0.177 in recovery rate. Damage-induced cracks demonstrated the highest resistivity growth amplitude and the most optimal recovery capability compared with the other two crack conditions.
- steel slag,
- carbon fiber,
- thermal sensitivity effect,
- pressure-sensitive effect,
- microcracks,
- resistance stability

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References(22)

References

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