Utilization of electric arc furnace dust as an admixture to Portland cement pastes

Electric arc furnace dust (EAFD) is termed as a hazardous waste due to its contamination with heavy metals. Inertization of such very fine dust can be occurred via stabilization and solidification process within the hydrated Portland cement matrix. In this paper, the effect of the addition of variou...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2013-11, Vol.114 (2), p.613-619
Main Authors: Hekal, Eisa E., Abo-El-Enein, Salah A., El-Korashy, S. A., Megahed, G. M., El-Sayed, T. M.
Format: Article
Language:English
Subjects:
Age
Analytical Chemistry
Applied sciences
Cement
Chemistry
Chemistry and Materials Science
Exact sciences and technology
Heating, ventilation, and air conditioning industry
Heavy metals
Hydrates
Industrial equipment
Inorganic Chemistry
Measurement Science and Instrumentation
Other industrial wastes. Sewage sludge
Physical Chemistry
Pollution
Polymer Sciences
Wastes
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Summary:Electric arc furnace dust (EAFD) is termed as a hazardous waste due to its contamination with heavy metals. Inertization of such very fine dust can be occurred via stabilization and solidification process within the hydrated Portland cement matrix. In this paper, the effect of the addition of various ratios of EAFD on the properties of the hardened Portland cement paste was investigated. Compressive strength, chemically combine water and free lime contents were determined. In addition, phase composition using XRD; DTA analysis; as well as microstructure of the formed hydrates for some selected samples were investigated using SEM. The obtained results showed that the paste containing 1/mass% EAFD give the highest compressive strength values at most hydration ages, specially the later ages, compared to the neat Portland cement blank paste. Whileas, the pastes containing 3 and 5/mass% EAFD showed lower values of compressive strength compared to those of the blank paste.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-013-2992-8