Metallurgical Slag is a kind of by-product of the metal smelting process. For many years, a huge amount of slag was deposited in waste dumps or stockpiles due to the increasing scale of metal production, which causes a series of social, environmental and economic problems. The sustainable utilisation of waste slag has become one of the major challenges in the field of civil and environmental engineering. The use of slag in cement production as an alternative cementitious material to form new green construction materials is a critical aspect to consume this huge amount of metallurgical solid waste. So far, blast-furnace slag (BF slag) has already been widely used in cement production, however, a large amount of non-BF slag (ferrous and non-ferrous) materials are still under-utilised.

This Research Topic, entitled “Non-BF slag Based Green Cementitious Materials”, is focused on the current understanding and up-to-date progress of non-BF slag-based green cementitious materials. At present, a lot of research has been carried out to investigate the use of non-BF slags in cement production. However, only a few examples of industrial applications have been reported. The main reason for this is the low activity of non-BF slags, which has not been fully overcome. The scope of this Research Topic is broad, covering all related topics and techniques, from structural characteristics and activation methods to material preparation and performance enhancement.

We will be glad to receive original studies, including research articles, review articles as well as mini-review related to the role of non-BF slag-based green cementitious materials. The contributions are expected to cover the themes listed below, but further topics can be included if in line with this field:
- Development of green non-BF slag-based cementitious materials (e.g., fly ash, blast furnace materials, EAF, BOF, copper, ferronickel, phosphorus, etc.)
- Hydration and microstructure formation of green cementitious materials
- Assessment of mechanical properties of green cementitious materials
- Methods to improve the activity of non-BF slag based green cementitious materials
- Results from laboratory experiments and/or large-scale projects
- Short and long-term performance of novel cementitious materials
- Case studies of green cementitious materials for mine filling

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