The evaluating standard for soundness of added with magnesia, which is based on the standard for cement paste at present and criticized by many experts of dam construction, have to be improved.

• 目前，外掺氧化镁微膨胀混凝土的安定性评定标准绝大多数沿用的是水泥净浆标准，许多专家对其提出异议，有待改进。