活性MgO对油井水泥性能的影响  

Effect of Active MgO on the Properties of Oil Well Cement

作　　者：刘雪沛 张蕾[1] 毛雯婷[2] 黄文君[2] 王震 马春铖 LIU Xuepei;ZHANG Lei;MAO Wenting;HUANG Wenjun;WANG Zhen;MA Chuncheng(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Key Laboratory of Building Structure and New Materials,Yunnan Institute of Building Research Co.,Ltd.,Kunming 650223,China;Yunnan Quality Inspection Station of Construction Engineering Co.,Ltd.,Kunming 650223,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]云南省建筑科学研究院有限公司云南省建筑结构与新材料重点实验室,昆明650223 [3]云南建筑工程质量检验站有限公司,昆明650223

出　　处：《材料导报》2024年第S02期149-154,共6页Materials Reports

基　　金：云南省科技厅科技计划基础研究专项(202401AT070145);云南省科技厅科技计划重点研发计划(202303AC100005);技术创新人才培养对象项目黄文君(202005AD160003)。

摘　　要：结合微观分析研究了三种不同活性MgO在不同掺量下的膨胀特性,以及活性MgO对水泥石试样自收缩性能及抗压强度的影响。结果表明:在80℃的高养护温度下,水泥石试样的膨胀量均随三种活性MgO掺量的增加而增加;在相同掺量下,含不同活性MgO的水泥石试样的最终膨胀量为M3>M2>M1;高活性的M1无法减少自收缩,而中等活性的M2和低活性的M3均可用于减少自收缩,且随着活性MgO含量的增加自收缩的补偿效果越好;约束条件有助于活性MgO提高水泥石试样的抗压强度。The expansion characteristics of three kinds of active MgO in different dosages and the effects of active MgO on the self-shrinking properties and compressive strength of cement samples were studied.The results show that:under the high curing temperature of 80℃,the expansion amount of the cement sample increases with the increase of the content of three kinds of active MgO;under the same dosage,the final expansion volume of the cement sample containing different active MgO is M3>M2>M1;highly active M1 could not reduce self-shrinkage,while moderately active M2 and low active M3 could be used to reduce self-shrinkage,and the compensation effect of self-shrinkage was better with the increase of active MgO content.Constraint conditions can improve the compressive strength of active MgO on cement samples.

关 键 词：MgO活性 MGO含量 膨胀特性 油井水泥 自收缩 抗压强度 

分 类 号：TU525.9[建筑科学—建筑技术科学]