1. The partial or total replacement of sand with granulated slag from the Kivcet and Imperial
Smelting plants having the composition examined here is feasible, provided that the
mix design does not impair the mechanical strengths of the concrete.
2. The possibility of using these slags as received, with no need for preliminary treatment,
is a major economic advantage for concrete industries operating in the vicinity of metallurgical
plants and largely solves the problem of their disposal.
3. When designing a material however due consideration should be given to its environmental
impact in the event of its being used for landfill. The life of a concrete does not
cease with the demolition of the building. Tests carried out on the concrete used here
suggest that, despite having a strong neutralizing potential on acid waters, the material
releases significant amounts of lead when kept at pH=5. This implies in any case the
need to dispose of the material in environments where such acidity cannot be attained by
the elution waters.