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THE EFFECT OF RECYCLED BLAST FURNACE SLAG WASTE ON THE CHARACTERISTICS AND DURABILITY OF CEMENT-BASED MORTARS

Liliana Maria Nicula

Abstract

This paper focuses on a study regarding the use of waste in constructions: such as blast furnace slag from ironworks, as a by-product of the iron oxide reduction reactions by carbon monoxide resulting from coke burning. The slag is used in cement-based mortar mixtures under two forms: as granulated and ground slag powder under 63 ?m and non-granulated slag as an 0/4 mm aggregate resulting from solid slag, processed in crushing equipment and then sorted according to the standards on mortar and concrete aggregates. At the global level, the necessity of reduction of non-renewable prime materials is very obvious. The use of recycled waste in constructions, in road infrastructure, such as slag waste, leads to decreasing the effect on the environment. The current study is in the preliminary phase of road concrete design mixture. This uses slag based waste, in order to reduce carbon print emitted during fabrication. Moreover, it reduces the consumption of prime non-renewable material, respectively of the mix-design aggregates that have been conducted. This paper analyzes the effect of blast furnace slag on the physical and mechanical properties and on some aspects of sustainability such as freeze-thaw resistance of a new environmentally-friendly mortar

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DOI resolver: doi.org/10.5593/sgem2018/6.3/s26.050

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