为满足高速路工程需要,我公司从2014年6月份开始利用当地一家化肥厂的磷石膏做缓凝剂生产缓凝P·O42.5水泥。在生产过程中,不断改进过程质量控制方法,取得较好成效。1小磨试验磷石膏化学成分见表1,缓凝水泥物料配比见表2,缓凝水泥理化性能见表3。根据小磨试验结果,磷石膏可作为缓凝剂生产缓凝水泥,而且对水泥后期增强作用优于二水石膏。 In order to meet the needs of expressway engineering, our company began to use the phosphogypsum of a fertilizer plant in our country as a retarder to produce retarding P · O42.5 cement from June 2014. In the production process, continuous improvement of process quality control methods, achieved good results. A small grinding test Phosphogypsum chemical composition shown in Table 1, slow-curing cement material ratio shown in Table 2, slow-setting cement physical and chemical properties in Table 3. According to the results of the small mill test, phosphogypsum can be used as retarder to produce retarding cement, and its reinforcing effect on cement is better than that of gypsum.