| Abstrakt: |
To promote the large-scale application of steel slag in road base, firstly, the process of steel slag standard system in road base was summarized, and the risks of steel slag volume expansion and heavy metal leaching were analyzed. Then, the pavement performance of cement stabilized steel slag macadam, cement fly ash stabilized steel slag macadam and lime fly ash steel slag macadam were comprehensively investigated. Finally, the application status and existing problems of steel slag base course were introduced. The results show that the volume stability of solidified steel slag can be improved by admixture method, and the content of active material can be controlled from the source by process method and melting tempering method. There is a risk of heavy metal leaching in steel slag, so the detection of raw materials of steel slag should be strengthened and special design should be carried out to avoid rainwater infiltration into the base. In general, the steel slag mixed into the base course mixture can improve the mechanical properties, significantly reduce the drying shrinkage, increase the crack resistance, and enhance the anti-scouring and anti-fatigue performance of cement stabilized steel slag macadam. The application of steel slag base course is in the exploration stage of paving test section. In future, research on steel slag based multi-source solid waste materials, steel slag base course complete technology and application policy guarantee system of steel slag should be conducted. [ABSTRACT FROM AUTHOR] |
