Materiales de Construcción, Vol 55, No 280 (2005)

Properties of SiMn slag as apozzolanic material in portland cement manufacture


https://doi.org/10.3989/mc.2005.v55.i280.206

M. Frías
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

M. I. Sánchez de Rojas
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

I. Menéndez
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

M. García de Lomas
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

C. Rodríguez
Ferroatlántica, División de Ferroaleaciones, Fábrica de Bóo de Guarnizo (Cantabria), Spain

Abstract


The primary purpose of this study was to evaluate the behaviour of SiMn slag as a pozzolanic material in commercial Portland cement manufacture. This necessitated exploring different scientific and technical aspects to ensure a correct valuation. The results obtained revealed that silica and calcium are the main components of SiMn slag, whose pozzolanic activity occupies an intermediate position between silica fume and fly ash; it reduces heat of hydration and mortars made with cement containing SiMn slag exhibit compressive strength values similar to the figures for standard mortar. Consequently, the use of SiMn slag as an active addition to cement is feasible, inasmuch as the resulting product meets the requirements laid down in the present legislation.

Keywords


recycling; SiMn slag; active addition blended cement; properties

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