Abstract
Three kinds of phosphorous slag powders from different localities (companies) were selected to test the dissolved phosphorus content in 3d curing age. Influence of different localities of the phosphorous slag powder on water requirement of normal consistency, setting time, soundness and mortar strength was studied. The results showed that the retarding effect of phosphorous slag powder and its dissolved phosphorus content was closely related. Under the condition of the same mixing amount, the more dissolved phosphorus content, the longer setting time. When the specimens contained same phosphorous slag powder, the dissolution rate and dissolved quantity increased with the increase of the specific surface area. And the setting time also increased with the increase of the specific surface area. The defference in the mortar strength of the phosphorous slag powders from different localities may be attributed to the comprehensive effect between retarding effect and pozzolanic effect.
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