In the present work, static settled concentration, pH and viscosity of bottom ash is studied with addition of additive. Sodium sulfate is used as an additive with proportion of 0.2, 0.4 and 0.6% (by weight). The solid concentration of bottom ash suspension varied from 20 to 50% (by weight). Remarkable improvement has been observed in static settled concentration, pH and viscosity with addition of sodium sulfate with proportion of 0.4%. Reduction in relative viscosity is highly pronounced at higher solid concentration. Similar observation has been reported for static settled concentration and pH of slurry suspension. Addition of additive in bottom ash suspension improves the rheological characteristics which can be beneficial for conveying bottom ash slurry suspension at higher concentration.
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