Carbonaceous mortars from Novae (Bulgaria) contain local loess, crushed bricks and ceramic dust (pozzolanic materials). The reaction between lime and pozzolanic additives occurs easily and affects the rate and course of leaching reaction of carbonates in orthophosphoric acid during the sample pretreatment for dating. The composition of the Bulgarian mortars does not allow for unambiguous conclusions about chronology, but together with the observations of experimental mortars, gives new guidelines in terms of pozzolanic mortar application for dating. The presented research illustrates the possible reasons of difficulties with obtaining the appropriate portion of gas for radiocarbon (14C) measurement. To verify the relative chronology of legionary baths complex in Novae, the charcoals samples were also dated in addition to the mortar.

中文翻译：

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Novae Bath Complex 砂浆和木炭的放射性碳测年：历史和实验砂浆样品与火山灰混合物的连续溶解

Novae（保加利亚）的碳质砂浆含有当地的黄土、碎砖和陶瓷粉尘（火山灰材料）。石灰与火山灰添加剂之间的反应很容易发生，并影响样品在测年前处理过程中碳酸盐在正磷酸中的浸出反应的速率和过程。保加利亚砂浆的成分不允许对年代学做出明确的结论，但结合对实验砂浆的观察，为火山灰砂浆的测年应用提供了新的指导方针。所提出的研究说明了难以获得适当部分的放射性碳气体的可能原因（14C) 测量。为了验证 Novae 军团浴场的相对年代学，除了砂浆之外，木炭样本也被确定了日期。