Preparation and properties of phosphogypsum 3D printing material
The effects of silica fume and retarders on the printability,mechanical properties of phosphogypsum 3D printing.material were investigated.The results show that as the amount of silica fume increases,the fluidity of phosphogypsum 3D printing material first increases and then decreases,and the height retention rate gradually decreases,with little change in strength.When the content of silica fume is 4％,the extrudability of the material is improved and the compressive strength is higher.The three kinds of retarders have different effects on material properties.From the perspective of printability,the influence of 200P and SG12X on the initial printability of the material is relatively small,but the printable time of the material is relatively short,and their content is high,which affects the early strength development of the material.GR200 has a relatively significant impact on the initial printability of the material,but the extrudability of the material is maintained for a longer time.From the perspective of strength,200P has little effect on strength,GR200 causes less strength loss,while SG12X causes greater strength loss.Comprehensively considering,GR200 should be selected as the retarder of phosphogypsum 3D printing materials,and its dosage should be controlled at 0.15％～0.20％.From the perspective of printing effect,the extrudability of the material was significantly improved after adding silica fume.The initial fluidity of the DY3 is 176 mm,and the initial height retention rate is 88.7％,indicating good printability.
phosphogypsum 3D printing materialssilica fumeretarderfluidityhigh retention rateprintability
万方数据
维普
