Effect of BaCO3 reactivity and mixing procedure on sulfate-resistant cement performance

The present study focuses on exploring the effects of reactivity and degree dispersion BaCO 3 additions in manufacture sulfate-resistant OPC cements. A new electrochemical deposition method is attempted to effectively disperse particles (studying two different materials with particle size: D 50 = 11.45 2.37 μm) cement enhance their favour sulfate immobilisation form BaSO 4 . barium carbonate additions, particularly finest, activate hydration a greater extent. Electrodeposition also observed improve early age (2 d–7 d) fine Cement paste bearing 15 wt % more resistant attack by 5% (w/v) solution Na 2 SO (180 d at 23 °C) than commercial cement, although secondary ettringite gypsum precipitated all cases. • activates portland hydration. enhances reactivity. precipitation lowers compressive strength. Paste resistance enhanced