测试了压蒸条件下两种天然长石在水及饱和Ca(OH) 2 溶液中碱溶出情况。结果表明 :长石在水中碱溶出量比较少 ,溶出的碱主要是钠碱。长石在饱和Ca(OH) 2 溶液中碱溶出量比较多 ,溶出的碱包括钠碱和钾碱。集料碱溶出对混凝土碱含量影响比较小 The alkali dissolution of two natural feldspar in water and saturated Ca (OH) 2 solution was tested under the condition of steaming. The results show that feldspar has less alkali elution in water, and the dissolved alkali is mainly sodium alkali. Feldspar in the saturated solution of Ca (OH) 2 alkali elution more, the dissolution of alkali, including sodium and potassium base. Aggregate alkali dissolution of concrete alkali content is relatively small