info:eu-repo/grantAgreement/Ministry of Education, Youth and Sports/8J/8JCH1002/CZ/Compound rejuvenating effects on aged bitumen from reclaimed asphalt material by bio-waste additives/
The physical properties, chemical composition and mineral phases of different steel slags were summarized. The factors that affect the volume stability and improvement measures were analysed. The mix design method for steel slag asphalt mixtures was discussed. The road performance(high temperature stability, low temperature crack resistance, moisture susceptibility, fatigue resistance, volume stability, and skid resistance)and functional characteristics(conductivity and microwave heating ability)of steel slag asphalt mixture were all investigated. The benefits of steel slag asphalt mixtures in ecology, society and economy were studied, and the engineering applications at home and abroad were introduced. Research result indicates that certain steel slag can be used for asphalt mixtures, and the steel slag for asphalt mixtures should be the basic oxygen furnace and electric arc furnace aged for more than half a year. The steel slag has excellent physical and mechanical properties, whilst the chemical composition and mineral phase composition are different for each slag type and affected by the steel making process. The lack of volume stability of steel slag can be improved with a pre-treatment or aging treatment. The key points of mix design of steel slag asphalt mixture include the mode and proportion of steel slag that can replace traditional aggregates, the gradation correction of asphalt mixture, the determination of effective relative density and the optimum asphalt-aggregate ratio. The pavement performances and functional properties of steel slag asphalt mixtures are better than those of natural aggregate asphalt mixtures. The use of steel slag asphalt mixture is of benefit to the environment and saves cost.The research on the road performance of steel slag asphalt mixture is additional, but the mechanism of action is relatively lacking.
