The ages of mortars and plaster can help reveal the history of monuments, their construction, or restoration times. However, these anthropogenic carbonates pose a challenge when it comes to separation of the atmospheric radiocarbon (14C) signal of the CO2 fixed in the mortar at the time of consolidation, i.e., the time of binder formation. The variety and heterogeneity of mortars require individual assessments of each sample and 14C results. Here we present our current preparation method and summarize experience based on results collected during the last 20 years of mortar dating at the ETH laboratory.

中文翻译：

---

在苏黎世联邦理工学院开发 14C 迫击炮测年

砂浆和灰泥的年代有助于揭示纪念碑的历史、建造或修复时间。然而，这些人为碳酸盐对大气放射性碳的分离提出了挑战（14C) CO 的信号2固结时即粘结剂形成时固定在砂浆中。砂浆的多样性和异质性需要对每个样品进行单独评估，并14C 结果。在这里，我们介绍我们目前的制备方法，并根据 ETH 实验室过去 20 年砂浆测年收集的结果总结经验。