Mechanical property of phosphogypsum based composite cementing material prepared with original phosphogypsum
Original untreated phosphogypsum was used to prepare a kind of phosphogypsum based cementing material, the mechanical property of the prepared material was tested and effects of quicklime content, water/cement ratio and molding pressure on the mechanical property were investigated. The results showed that with the quicklime content of 4％, the phosphogypsum slag composite cementing material had a good mechanical property, slag power had a positive correlation with the mechanical property of the phosphogypsum fly ash composite cementing material, and the mechanical property of the phosphogypsum slag boiler slag composite cementing material decreased as the molding pressure was greater than 3 MPa. Compared with the specimens prepared by casting molding method, the total porosity value of the specimens prepared under 5 MPa molding pressure was larger, especially for the volume fraction of more than 200 nm pore. Its microstructure would be destroyed, thus its mechanical property was decreased.
国家科技期刊平台
NSTL
万方数据
维普
