中文摘要：

混凝土碱含量是诊断和预测混凝土碱集料反应（AAR）破坏的重要基础数据之一。为比较不同途径和方法获取混凝土碱含量数据的相关性,分别采用酸溶法和热水浸出法研究不同碱含量的实际混凝土构件芯样的总碱含量和水溶性碱含量,比较了计算碱含量与实测碱含量的相关性,并探讨了细集料对碱含量测定结果的影响。结果表明：针对实际混凝土构件芯样,配合比计算碱含量与测定碱含量没有明显的相关性,碱含量测试样品制备过程混入的细集料,以及细集料中的部分含碱矿物在测定过程中的碱溶出是最重要的干扰因素。因此,为高效和经济预防AAR,需要进一步系统研究混凝土配合比计算碱含量与实际测定碱含量的相关性,以及细集料中含碱矿物种类、含量等对测定结果影响的量化关系。

英文摘要：

Alkali content of concrete was one of the fundamental data for the diagnosis and prognosis of alkali-aggregate reaction（ AAR） in concrete. In order to explore the correlation between the alkali contents of concrete obtained by different ways and methods,the total alkalis and water soluble alkalis of the field concrete cores with different alkali contents calculated by mixing proportion were tested by acid soluble method and the hot-water extraction method,respectively. The correlation between the alkali contents acquired by mixing proportion and by actual measurement,and the influences of fine aggregates on testing alkali contents were discussed. Results show that,there was no significant correlation between the alkali contents obtained by mixing proportion calculation and actual measurement. The incorporation of part of fine aggregates into the samples during the sample preparation process,and the alkali release from the fine aggregates was the main contribution to this miscorrelation. Therefore,for avoiding the AAR risk effectively and economically,the correlation between calculated and tested alkali contents in concrete team needed to be further studied. The influence of the contents and types of alkali-bearing minerals in aggregates on alkali measurement also needs to be clarified.