An eco-friendliness inductive asphalt mixture comprising waste steel shavings and waste ferrites. (10th February 2021)

• Record Type: Journal Article
• Authors: Liu, Kai; Fu, Chaoliang; Xu, Peixin; Li, Shuqin; Huang, Muyang
• Is Part Of: Journal of cleaner production. Volume 283(2021)
• Publication Date: 2021-02-10
• Subjects: Asphalt mixture -- Induction healing -- Waste -- Economic benefits -- Environmental impact; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2020.124639
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Improper disposal of waste steel and waste ferrites in landfills will pollute ecosystems. Meanwhile, the addition of commercial metals in conventional inductive asphalt mixture (C-IAM) can heal pavement crack via induction heating. However, the high cost of commercial metals limits the wide use of C-IAM. To promote an environmentally friendly and low-cost inductive asphalt solution, as well as improving the healing efficiency, a new inductive asphalt mixture (N-IAM) comprising waste steel shavings and waste ferrites was creatively designed to enhance induction heating rate (IHR). Under the different heating power ( P ), frequency ( f ) and waste steel shavings content ( S ), IHR and energy conversion improvement rate (ECIR) were used to evaluate the heating performance of N-IAM. Then, the prediction models of heating performance were established and the verified experiments were conducted. Results revealed that the IHR of N-IAM is greater than C-IAM, and IHR increases with the increases of S, P and f . The ECIR of N-IAM increases with the increase of S and P, while the ECIR decreases with the rise in f . The optimum experimental scheme ( S : 5.6%, P : 6 kW, f : 40 kHz) was recommended based on the prediction model, which was verified by experiments. It was also proved that N-IAM could improve the healing effect of the heat transfer area. Finally, compared with C-IAM, the electric fees saved and CO2 emission reduced by N-IAM in unit pavement within 1 h is 1.73 × 10 5 dollars and 5 × 10 5 kg respectively. Highlights: A new inductive asphalt mixture comprising waste steel shavings and waste ferrites was creatively designed. The prediction model of the heating performance of new inductive asphalt mixture was established. The optimum experimental scheme was recommended based on the prediction model. The new inductive asphalt mixture could improve the healing effect of the heat transfer area. The economic benefits and environmental impact of new inductive asphalt mixture were analyzed.