Utilization of Steel Slag in Road Semi-Rigid Base: A Review
Source abstract
Abstract
Steel slag (SS) is industrial waste, and there is a large amount of SS to be treated in China. Its disposal generates severe environmental pollution. One of the best ways to use SS is as a road base material. This paper reviews the possibility of using SS in semi-rigid base and evaluates the performance of SS base course. The interaction between three stabilizers (cement, lime–fly ash, and cement–fly ash) and SS is analyzed, and the influence of modifier content on the performance of base course is evaluated. The potential laws between SS, curing time, and unconfined compressive strength, as well as drying shrinkage and temperature shrinkage, are discussed and their effects on the performance of the base course are revealed. The finite element method, discrete element method, and molecular dynamics can be used to analyze the freeze-thaw, rutting resistance, and crack development of SS base. In addition, compared with traditional macadam base, the CO2 emissions for the use of SS base are slightly more, one of the disadvantages of its use in production, transportation, and compaction. However, considering the overall mechanical, economic, and environmental benefits, it is recommended to use SS in semi-rigid base course. The future research scope of SS as base material is suggested.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Asphalt Pavement Performance Evaluation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Road Engineering Research Center, Xi’an University of Science and Technology, Xi’an 710054, China
Qinghai Xihu Expressway Management Co., Ltd., Xining 810001, China
School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
Funding
Key R & D and Transformation Plan of Qinghai Province · Key Research and Development Project of Shaanxi Province · Science and Technology Project of Henan Department of Transportation · Science and Technology Project of Shaanxi Department of Transportation
References (99)
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