矿渣油井水泥的早期膨胀性能研究  

Study on the Early Expansion of Slag-oil-well Cement

作　　者：张礼华[1] 刘来宝[1] 周永生[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,绵阳621010

出　　处：《硅酸盐通报》2012年第5期1086-1091,共6页Bulletin of the Chinese Ceramic Society

基　　金：西南科技大学青年基金项目(08zx3104);先进建筑材料四川省重点实验室开放课题基金(09ZXXK09);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开放课题基金资助(10ZXFK12;10ZXFK04)

摘　　要：研究了石膏、镁质膨胀剂对矿渣油井水泥的早期膨胀性能的影响。随着矿渣掺量的增加,油井水泥的早期膨胀率逐渐降低;随着石膏掺量的增加,矿渣油井水泥早期膨胀率显著增大。在初期,50℃养护下,膨胀率增加;80℃养护下,膨胀率降低。煅烧氧化镁的掺入改善了高温养护下矿渣油井水泥的膨胀性能,水泥石早期膨胀率随着氧化镁含量的增加而显著增大。The influences of gypsum and MgO-type expansive agents on the early expansion oI slag-oil- well cement were studied . The results show that early expansion of oil-well cement decreases with the content of slag, but early expansion of slag-oil-well cement increases obviously with it. And with time, early expansion of slag-oil-well cement increases at 50 ℃ , decreases at 80 ℃ yet. Calcined MgO can certainly improve the expansion of slag-oil-well cement cured at high temperature. The early expansion of cement block increases obviously with the content of MgO. And MgO burned at 800 ℃ is better relatively.

关 键 词：油井水泥 矿渣 石膏 早期膨胀率 镁质膨胀剂 

分 类 号：TQ172[化学工程—水泥工业]