Hydration study of limestone blended cement in the presence of hazardous wastes containing Cr(VI)

Summary

Chromium is a hazardous heavy metal which can be eliminated  by solidification in a cementitious matrix. The effect of Cr(VI) from industrial wastes in limestone cement hydration was studied.  The cementitious materials were ordinary Portland cement as reference material, and limestone blended  cement.  The hydration and physicomechanical properties of the cementitious materials and the influence of chromium at an early age were studied with XRD, FTIR, conductimetry and mechanical tests. Portland cement pastes with the addition of Cr(VI) were examined and leaching behaviour with respect to water and acid solution were investigated.  It was shown that Cr(VI) modifies the rate and the components obtained during cement hydration.  25 refs.

Primary author(s): Trezza M A; Ferraiuelo M F

                            Buenos Aires,Universidad Nacional del Centro

Source: Cem.Concr.Res.

            33,No.7,2003,p.1039-1045


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