Effect of Silica Fume on Mechanical Properties and Water Resistance of Magnesia Cemen
To enhance the mechanical properties and water resistance of magnesium cement,this paper with magnesium cement as base materi-al,sodium citrate as admixture,silicon ash as admixture,preparation of cement test,through test analysis,shows that the reference ratio of oxygen to sulfur ratio 1.8,water sulfur ratio 0.9,citric acid content 1.2%,silica content 20%,sulfur magnesium cement compressive strength is the highest,3 d can reach 43.2 MPa,7 d can reach 48.5 MPa,28 d can reach 65.4 MPa,this is due to the incorporation of silica ash reduce the internal stress,and hinder the formation of coarse grain.The water softening coefficient can also reach 0.83.Because the filler particles are dispersed to fill the void of the hydration system,the material stability and water resistance are improved.
Magnesium sulfur and oxygen cementMechanical propertiesWater resistanceSilica fume
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