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Article Dans Une Revue Cement and Concrete Composites Année : 2014

Properties of hydraulic paste of basic oxygen furnace slag

Cecile Diliberto
André Lecomte

Résumé

Basic Oxygen Furnace (BOF) slags are by-products of the conversion of pig iron to steel. They mainly contain C2S, C2F, Fe1-xO, CaO, Ca(OH)(2) and CaCO3. According to their chemical composition they are a valuable mineral resource as additions in certain hydraulic binders. This paper presents a hydration study of the BOF slag pastes preserved at different temperatures and in different environments. Pastes are characterized by X-ray diffraction and scanning electron microscopy. The compressive strengths of hydrated pastes are given at 7, 28, 90 and 190 days. Results show that - BOF slags containing 40% of C2S - have attractive mechanical properties. Hydration tests under water showed a pastes swelling due to the hydration of CaO contained in BOF slags. A lime extinction procedure was proposed as alternative to standard PR NF EN 13282-2. This approach is more effective for these materials: the volume expansion of pastes cured in water is avoided and the compressive strengths are thus significantly improved.
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Dates et versions

hal-01297528 , version 1 (04-04-2016)

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Citer

Essia Belhadj, Cecile Diliberto, André Lecomte. Properties of hydraulic paste of basic oxygen furnace slag. Cement and Concrete Composites, 2014, 45, pp.15-21. ⟨10.1016/j.cemconcomp.2013.09.016⟩. ⟨hal-01297528⟩
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