氧化镁、三氧化硫和游离氧化钙是影响水泥安定性的有害成分,本文简要地介绍了氧化镁、三氧化硫和游离氧化钙含量的检验方法,总结了实际检测中的注意问题及操作要点,为实际测定工作提供参考。 Magnesia, sulfur trioxide and free calcium oxide are harmful components affecting the stability of cement. This paper briefly introduces the test methods of magnesium oxide, sulfur trioxide and free calcium oxide content, summarizes the attention problems in the actual testing and the operating points , For the actual determination of work to provide a reference.