氯氧镁水泥在特定水环境中的强度变化规律试验研究

Study on the Cmpressive Strength Development of Magnesium Oxychloride Cement in Specific Water Environment

中文关键词:  氯氧镁水泥  强度变化规律  抗压强度保留相  特定水环境

英文关键词:Magnesium oxychloride cement  Development of compressive strength  Compressive strength retention  Specific water environment

中文摘要:

      为了研究氯氧镁水泥(MOC)试件分别在老卤、原卤、海水和淡水4种水环境中的强度变化规律,以掺加一定量复合改性剂MOC为基体,将其养护28d后,分别置于老卤、原卤、海水和淡水中浸泡一定期龄,分析其在4种特定水环境中的强度变化规律。实验结果表明,MOC试件在4种特定水环境中抗压强度变化规律不同。相较于在空气中养护,MOC在老卤、原卤、海水和淡水浸泡下,抗压强度有不同程度的降低,其在4种水环境中降低程度依次为:淡水>海水>原卤>老卤。经4种特定水环境浸泡3个月后,MOC抗压强度保留相在老卤中最高,其抗压强度保留相高达95.60%,证明MOC试件在老卤中具有较好的抗盐卤腐蚀性能。

英文摘要:

      In order to research the compressive strength development of Magnesium Oxychloride Cement(MOC) in different water environment,the experiment about the compressive strength development of MOC pastes mixed with composite addictive was carried when immersed in the four water environment such as brine,raw brine,seawater and freshwater for specific period after 28 days air curing. The results show that the compressive strength development of MOC specimens varies in four kinds of specific environment. In comparison with the MOC pastes immersed in air,the compressive strength of MOC pastes decreased steadily after aging brine,raw brine,seawater and freshwater immersion. The degree of compressive strength decreasing has the trend of freshwater>seawater>raw brine>aging brine after immersing. After soaking in aging brine,the compressive strength retention of MOC pastes is highest,which has the compressive strength retention of 95.60%. This proves that the MOC pastes have better salt attack performance after aging brine immersion than the other three kinds of water environment.