Effect of steel slag aggregates on engineering properties and residual marshall stability of open-graded asphalt concrete

https://doi.org/10.31130/ud-jst.2025.23(10B).637E

Tóm tắt: 75 | PDF: 36

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Author

  • Thao T.T. Tran
    The University of Danang - University of Science and Technology, Vietnam
    Phuong N. Pham
    The University of Danang - University of Science and Technology, Vietnam
    Nguyen T.K. Dinh
    The University of Danang - University of Science and Technology, Vietnam
    Huy T Ngo
    The University of Danang - University of Science and Technology, Vietnam
    Phat Nguyen
    The University of Danang - University of Science and Technology, Vietnam
    Hai H. Nguyen
    The University of Danang - University of Science and Technology, Vietnam

Từ khóa:

Steel slag aggregates
open-graded hot mix asphalt
engineering properties
Marshall stability
residual Marshall stability

Tóm tắt

This study investigated the influence of steel slag (SS) aggregates on the mechanical properties of open-graded hot mix asphalt (OGA), replacing crushed stone at 50%, 75%, and 100% by volume. Results showed that the optimum bitumen content (OBC) increased significantly with higher SS usage (up to 87.9% for 100SSA), likely due to SS's higher absorption. The initial Marshall stability also drastically improved, increasing by up to 172.1% for 100SSA (8.18 kN), attributed to the superior strength and interlocking of SS particles. However, the residual Marshall stability (after moisture/heat exposure) decreased as SS content increased, indicating lower moisture resistance. 75SSA provided the best balance, exhibiting 24% higher residual stability than 100SSA.The paper suggests that OGA with 75% or more SS can be used as a pavement base layer, provided it is placed at a minimum depth of 7 cm and exposed to favorable hydrothermal conditions to mitigate moisture damage.

Tài liệu tham khảo

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Oct 31, 2025
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Tran, T. T., P. N. Pham, N. T. Dinh, H. T. Ngo, P. Nguyen, và H. H. Nguyen. “Effect of Steel Slag Aggregates on Engineering Properties and Residual Marshall Stability of Open-Graded Asphalt Concrete”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 23, số p.h 10B, Tháng Mười 2025, tr 57-61, doi:10.31130/ud-jst.2025.23(10B).637E.

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