电石渣改性磷石膏作缓凝剂对水泥性能的影响  

Phosphogypsum Modified with Acetylene Sludge as Retarder and Its Effect on the Properties of Cement

作　　者：张晶晶[1] 齐砚勇[1] 赵国华[1] 潘玉峰[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010

出　　处：《非金属矿》2013年第5期22-25,共4页Non-Metallic Mines

摘　　要：用电石渣对磷石膏进行改性处理作为水泥缓凝剂,研究其对实验室所配P·C32.5R复合水泥性能的影响。结果表明,电石渣改性磷石膏掺入4%、外掺1%电石渣时,该水泥初凝时间为181 min,终凝时间为241 min;28 d抗折强度为7.5 MPa,28 d抗压强度为39.9 MPa,满足P·C32.5R水泥的性能指标;电石渣中除钙质外的少量杂质对水泥性能无不良影响。The phosphogypsum was modified with acetylene sludge and was made as the cement retarder. The influence of the phosphogypsum modified with the acetylene sludge on the properties of the P.C32.5R cement was studied. The studies showed that, when adding 4% modified phosphogypsum and 1% cetylene sludge into the cement, its initial setting time was 181 min and final setting time was 241 min, 28 d flexural strength was 7.5 MPa and 28 d compressive strength was 39.9 MPa, which fully met the performance indicators of the P.C32.5R cement. Besides, the impurities in the modifier had no bad influence on the property of P.C32.5R.

关 键 词：电石渣 改性 磷石膏 缓凝剂 

分 类 号：TQ172.9[化学工程—水泥工业]