Study on the Characteristics of Steel Slag and its Road Performance in Asphalt Mixture

Shuo Chen *

School of Civil Engineering and Ttransportation, North China University of Water Resources and Hydropower, Zhengzhou-450045, Henan, China.

Deqing Tang

School of Civil Engineering and Ttransportation, North China University of Water Resources and Hydropower, Zhengzhou-450045, Henan, China.

Zhi Li

School of Civil Engineering and Ttransportation, North China University of Water Resources and Hydropower, Zhengzhou-450045, Henan, China.

*Author to whom correspondence should be addressed.


Abstract

Based on the characteristics of steel slag, the application progress of steel slag as aggregate in asphalt mixture is summarized. Firstly, the differences in mechanical properties, chemical composition and physical structure of steel slag aggregates treated by different methods are summarized. The surface structure of steel slag is rough and rich in edges and corners, showing good wear resistance and crushing resistance, but there are also problems such as high density, high water absorption and volume instability. Among them, volume instability is the key factor affecting the application of steel slag in asphalt mixture. Then, the effects of steel slag aggregate on the road performance of asphalt mixture, such as water stability, rutting resistance, high temperature stability and low temperature cracking resistance, are summarized in detail. It is found that steel slag instead of coarse aggregate in asphalt mixture can improve the performance of skid resistance, rutting resistance and fatigue resistance. The water damage performance is due to the different sources of steel slag, and the uncertainty of the change results is large. On the whole, steel slag instead of aggregate can improve the road performance to a certain extent, but the volume of steel slag aggregate is unstable, which may bring some variability. In the process of road application, targeted regulation should be carried out to ensure the stability of asphalt mixture performance.

Keywords: Steel slag, aggregate, asphalt mixture, physical properties, road performance, summary


How to Cite

Chen, Shuo, Deqing Tang, and Zhi Li. 2024. “Study on the Characteristics of Steel Slag and Its Road Performance in Asphalt Mixture”. Journal of Engineering Research and Reports 26 (11):28-35. https://doi.org/10.9734/jerr/2024/v26i111312.