改性磷铝酸盐水泥缓凝剂优选试验研究  

Optimization selection of retarders for modified phosphoaluminate cement

作　　者：马聪[1] 韩伟 周桂政 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院土木工程系,上海200240 [2]长城钻探工程有限公司钻井三公司,辽宁盘锦124000 [3]长城钻探工程有限公司西部钻井公司,辽宁盘锦124000

出　　处：《新型建筑材料》2014年第5期7-10,共4页New Building Materials

基　　金：国家自然科学基金资助项目(51378309);中国铁路总公司科技研究开发计划项目(2013G008-F)

摘　　要：改性磷铝酸盐水泥与常规油井水泥相比具有优异的耐腐蚀性,但是该水泥的稠化时间不易调节。而稠化时间对固井施工安全起到了决定性的作用。为满足固井工程施工需求,对改性磷铝酸盐水泥缓凝剂进行了优选实验。结果表明:对常规油井水泥缓凝效果良好的羟基羧酸、无机酸以及磷酸盐类不能使改性磷铝酸盐水泥缓凝;部分无机盐(Na2B4O7·10H2O、Na2SiO3·9H2O)缓凝作用显著,但显著地影响了水泥石的强度;木质素磺酸钠延缓了铝酸盐矿物的水化进程,减少了水化产物中磷灰石的生成量,延长了水泥浆稠化时间,使水泥浆具有较好的流变性和一定的触变性。Compared with conventional well cement,modified phosphoaluminate cement has excellent corrosion resistance, but its thickening time is not easy to be adjusted. The thickening time plays a decisive role in the cementing security. Optimization selection was made for modified phosphoaluminate cement retarder to meet the requirement in cementing engineering. Experiment result validated the ineffectiveness of hydroxyl carboxylic acid, inorganic acid and phosphates,though they show satisfying perfor- mance for normal well cement retarder. The inorganic salt that effectively retard（Na2B4O7·10H2O、NaZiO3·9H2O） greatly undermined the strength of cement paste. Sodium hgnosulphonate delays the hydration process of the aluminate minerals, reduces the generation amount of phosphorite,prolongs the thickening time of cement slurry, making the cement slurry have better rheological property and certain degree of thixotropic property.

关 键 词：改性磷铝酸盐水泥 缓凝剂 作用机理 木质素磺酸钠 

分 类 号：TU528.042.3[建筑科学—建筑技术科学]