Abstract

Blast-furnace slag (BFS), a by-product of the steel production, is commonly used in the production of blast-furnace slag cements but can also be added to the concrete mixture separately. The effect of BFS on the hydration process and on the setting of the fresh concrete has not been investigated thoroughly, certainly when high percentages of the cement are replaced by the slag. Therefore, calorimetric and ultrasonic measurements were performed on fresh mixtures made with increasing Portland cement replacement by BFS.

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