Effect and Regulation of Grind Granulated Phosphorus Slag on Setting Time and Early Strength of Portland Cement
The effect of soluble fluorine and phosphorus on the surface of the grind granulated phosphorus slag(GGPS)particles on the setting time and strength of Portland cement was studied by immersing.Based on the feasibility and economy of the process,after co-storage of GGPS with calcium-based precipitant,the setting time and activity index were tested,and the micromorphology of the surface of phosphorus slag particles was analyzed by SEM.The results show that immersion can eliminate the retarding effect of GGPS and improve its 1d and 3d activity,but the effect on the 7d activity is little.After co-stacking,the setting time of cement mixed with GGPS was the same as that of pure cement,and the activity increased to 50%in 1d,60%in 3d and 73%in 7d.
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