EAF dust recycling has become necessary, specially, due to Environment Agencies Regulations to final disposition of such waste. One of the alternatives for it's recycling is the addition in concrete pavement. Howe...
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ISBN:
(纸本)8586778753
EAF dust recycling has become necessary, specially, due to Environment Agencies Regulations to final disposition of such waste. One of the alternatives for it's recycling is the addition in concrete pavement. However, this addition retards this beginning of the hydration reactions of the cement, which retardation does not permit its use. This retardation is attributed to the contained zinc in the EAF dust. This element is present in the EAF dust as two compounds, franklinite (FeZn2O4) and zincite (ZnO). This work has the aim to study the phenomena related to the retardation of the beginning of hydration reactions, caused by the addition of ZnO into cement paste. 10 wt% of ZnO were added to cement pastes. The samples with and without ZnO were analyzed via Scanning Electron microscopy (SEM) e X-Ray Diffraction in different ages to evaluate the phenomena occurred during the hydration of the cement pastes.
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