Study on the mix ratios in the solidification of residual mud with magnesium oxychloride cement
The preparation process of magnesium oxychloride cement consumes less energy and produces less CO2 compared with ordinary Portland cement,and residual mud is one of the bulk solid wastes in China.Using magnesium oxychloride cement to solidify residual mud is a greener way to achieve resource utilization of residual mud.Using the initial mois-ture content of the residual mud and the amount of magnesium oxychloride cement as varia-bles,and the compressive strength and flexural strength after solidification as evaluation in-dicators,this study investigates the mix ratios in the solidification of residual mud with mag-nesium oxychloride cement.Fly ash and silica fume are used as admixtures for magnesium oxychloride cement,and the effects of these admixtures on the mechanical properties and water resistance of solidified residual mud are studied.The experimental results show that when the initial moisture content of the residual mud is 16％,the content of magnesium oxy-chloride cement is 20％and the substitution rate of admixtures in magnesium oxychloride ce-ment is 10％,the results of using magnesium oxychloride cement to solidify residual mud are better.The mechanism and feasibility of solidifying residual mud with magnesium oxychlo-ride cement have been clarified.
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