The work presented in this paper comprises an extensive testing program on the resistance of portland-limestone cement (PLC) concrete systems to external sulfate attack. Several mixture parameters, namely interground limestone content, C₃A content, and SCM type and replacement level, were evaluated in a wide range of experimental conditions designed to link, replicate, and predict laboratory and field performances. The presented results have highlighted the role that the experimental parameters play in the degradation process, which were shown to be particularly pronounced in systems of low sulfate resistance with high limestone contents, owing to their high propensity for thaumasite formation. The findings presented will be crucial to evaluate/develop an accelerated testing procedure that provides a better correlation with actual field performance of concrete structures.

本文介绍的工作包括关于硅酸盐-石灰石水泥（PLC）混凝土系统对外部硫酸盐侵蚀的抵抗力的广泛测试程序。几个混合参数，即地间石灰石含量，C ₃在旨在链接，复制和预测实验室和现场性能的各种实验条件下，评估了含量，SCM类型和替代水平。呈现的结果突出了实验参数在降解过程中的作用，由于其对高岭石形成的高倾向，在具有高石灰石含量的低硫酸盐抗性体系中显示出特别明显的作用。提出的结果对于评估/开发加速测试程序至关重要，该程序可以与混凝土结构的实际现场性能更好地关联。