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Structural Concrete, Vol. 3, no. 2, June 2002

Full-scale static loading tests on concrete armour units with the incorporation of LD-slag

G. De Schutter, Ghent University, Belgium
K. Audenaert, Ghent University, Belgium
J. De Rouck, Ghent University, Belgium

LD-slag is an industrial by-product resulting from the transformation of hot metal into steel by oxygen refining. In order to avoid waste disposal, the incorporation of LD-slag in concrete armour units for breakwaters has been studied. Due to the higher density of LD-slag in comparison with traditional aggregates, a higher hydraulic stability of the armour units is obtained for a given unit size. Static loading tests showed that the mechanical behaviour of breakwater armour units made with the LD-concrete is comparable to the mechanical behaviour of units made with traditional concrete. However, durability problems might occur due to an insufficient volume stability of the LD-slag. To overcome this problem, treated slag has to be used.

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