Abstract
This paper presents a review on the sustainable use of steel industry slag (SIS) in the construction industry for sustainable development. This issue also may contribute significantly to attain the sustainable development goal (SDG). If feasible sector is not determined earlier for the use of SIS for the country like Bangladesh then the unproductive uses will be increased and as well without large-scale utilization, direct dumping of SIS will create environmental hazards. On the other hand, the sustainable use of SIS in concrete production can contribute to the economic growth of the country; in addition, it can also contribute to keeping our natural environment safe from hazardous pollution. Another observation of this study is SIS used in cement and concrete production as aggregate or as additional cementing materials has a long-term strength and durability. Besides, replacement of cement with SIS deferred the hydration reaction at early ages, without any significant troubles. Furthermore, it can also be mentioned that high replacement of SIS with cement may raise a problem of volume instability which can be solved by using ground-granulated blast-furnace slag (GGBS) as combined admixture and the slump problem of concrete mixtures can be adjusted with addition of copper slag or class F fly ash. Feasibility analysis of SIS usage and an awareness program for all the stakeholders may be implemented for the sustainable uses of SIS. Both of these will play a vital role to safeguard environment in addition to economic growth of the country.
Highlights
This paper presents a review on the sustainable use of steel industry slag (SIS) in the construction industry for sustainable development
3) The sustainable use of SIS in concrete production can contribute to the economic growth of Bangladesh in addition it can contribute to safe our natural environment through reducing CO2 emissions, conserving natural resources and energy savings
6) High replacement of SIS with cement may raise a problem of volume instability due to presence of free CaO and MgO but it can be solved by using ground-granulated blast-furnace slag (GGBS) as combined admixture
Summary
Large-scale utilization of SS is crucial because of its massive production, which will create environmental hazards if it is dumped directly. In this context, the construction industry can play an important role. SIS has not yet reached a high level of utilization in country like Bangladesh. Possible reason behind this is the lack of research about how to use this steel industry byproduct. It is needed to find a method for recycling SIS as a more highly valued material, to ensure its potential use as an admixture in concrete production
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