Abstract
Mortars were prepared with an industrial incinerator waste material similar to silica fume as an additive to or a partial replacement for cement to investigate whether the copper and zinc contents present in the waste material had an adverse effect on the compressive strength. When used as a cement replacement, high copper contents (0.69, 0.96, 1.38% by weight of pozzolanic material) were detrimental to the early strength development. Lower copper contents (0.24 and 0.48% by weight of pozzolanic material) did not affect the strength development. When used as an additive to cement in mortar, the copper content of the material did not affect the strength development. Higher compressive strength compared to a control resulted when the material was used as a 10, 15, or 20% additive to cement (based on the percent weight of cement). Conclusions regarding the effect of the zinc content could not be drawn due to the significant copper concentration relative to the concentration of zinc in the waste material.
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