Effect of Ultrafine Phosphorus Slag Addition on the Performance of Manufactured Sand Concrete with High Strength

Using our independently designed grounding device, a ultrafine phosphorus slag particle with a special surface area of 990 m(2)/kg was produced out of grinded factory rubbish. Activity test of ultrafine phosphorus slag was conducted through test method for the strength of cement mortar. A systematic analysis on adding ultrafine phosphorus slag into manufactured sand concrete with high strength was also conducted and the test results show the ultrafine phosphorus slag can improve the fluidity and density of high strength concrete and reduce shrinkage and thus improve its durability.