Study of the Suitability of Different Types of Slag and Its Influence on the Quality of Green Grouts Obtained by Partial Replacement of Cement

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2019-04Department
Ingeniería Industrial e Ingeniería CivilSource
Materials 2019, 12, 1166Abstract
This paper is part of a research line focused on the reduction of the use of cement in the
industry. In this work, the study of work methodologies for the manufacture of green cementitious
grout mixtures is studied. Grout is widely used in construction and it requires an important use of
raw materials. On the other hand, the steel industry faces the problem of the growing generation
of slag wastes due to the increase in steel manufacturing. The green grout aims to achieve the dual
objective of reducing the demand for cement and improve the slag waste valorization. Slag is not
introduced as an aggregate but through the direct replacement of cement and no additives. The
research seeks a product where we can use steel slag intensively, guaranteeing minimum resistance
and workability. Results with substitutions between a 25% to 50% and water/cement ratio of 1 are
presented. In particular, the suitability of different slags (two Ladle Furnace Slag (LFS) and one Blast
Furnace Slag (GGBS)) in the quality of the final product are analyzed. The feasibility of replacing
cement with slag and the importance of the origin and pretreatment are highlighted.
Subjects
cementitious grout; green grout; cement; slag substitution; valorization; circular economyCollections
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