引言混凝土外加剂产品发展迅速,对改良混凝土性能起着非常重要的作用。确定混凝土外加剂中碱含量对混凝土正确配比至关重要。国家标准《混凝土外加剂》于1995年进行修订,1997年正式实施,新标准对混凝土外加剂中碱含量有严格的要求并且制定了相关的标准测定方法——火焰光度法(GB/T8077-1997)。此方法具有操作简单、测定结果重复性好、精密度高等优点。本文依据《混凝土外加剂匀质性试验方法》(GB/T8077-2012)对外加 Introduction Concrete admixtures products developed rapidly, to improve the performance of concrete plays a very important role. Determining the amount of alkali in concrete admixtures is crucial to the correct mix of concrete. The national standard “Concrete admixture” was revised in 1995 and was formally implemented in 1997. The new standard has strict requirements on the alkali content of concrete admixture and has developed the relevant standard measurement method - flame photometry (GB / T8077-1997 ). This method has the advantages of simple operation, good repeatability of measurement results and high precision. This article based on “uniformity of concrete admixture test method” (GB / T8077-2012) on the external