Carbonation of cement-based building materials is not only a frequent trigger for corrosion of the reinforcement, but also causes various significant property changes in the carbonated layer. In addition to the decrease in the pH of the pore solution, carbonation is accompanied by a modification in the pore structure due to dissolution and precipitation reactions. The progress of carbonation is currently commonly measured by the phenolphthalein test. In this study, the non-destructive unilateral hydrogen nuclear magnetic resonance (¹H NMR) was used to determine the carbonation progress of mortars as well as changes in the pore structure. The ¹H NMR results were correlated and validated with known methods for characterizing the carbonation progress, including the carbonation depths, but also other structural and mineralogical changes. These results serve as a proof-of-concept which gives reason to apply this non-destructive method to further building materials, especially new environmentally-friendly binders.

水泥基建筑材料的碳化不仅是钢筋腐蚀的常见诱因，而且会引起碳化层各种显着的性能变化。除了孔隙溶液pH值的降低之外，碳酸化还伴随着由于溶解和沉淀反应而导致的孔隙结构的改变。目前通常通过酚酞试验来测量碳酸化的进程。本研究利用非破坏性单边氢核磁共振（¹ H NMR）测定砂浆的碳化进程以及孔隙结构的变化。¹ H NMR结果与用于表征碳化进程的已知方法进行关联和验证，包括碳化深度以及其他结构和矿物学变化。这些结果作为概念验证，为将这种非破坏性方法应用于其他建筑材料，特别是新型环保粘合剂提供了理由。