Abstract In this investigation, ettringite-based mortars were synthesized from ladle slag (LS) and phosphogypsum (PG), promoting the concept of a circular economy. However, the reuse of naturally occurring radioactive materials (NORM), such as PG, requires radiological investigation. Also, the immobilization degree for contaminants contained in PG should be evaluated. The former was investigated using gamma spectroscopy and radon exhalation/emanation tests, while the latter was assessed using an up-flow percolation column test according to the CEN/TS 16637-3. The produced mortars comply with current legislation on naturally occurring radionuclides (NOR) in building materials, proving that they can be safely used for building purposes. The radon emanation decreased upon increasing the Polish PG content, which was mainly determined by the microporosity. The specific surface areas were 20–30 times lower than conventional cement, and the immobilization degree for contaminants was generally high (>90%). This investigation demonstrates high potential for PG reuse in ettringite-based mortars.

中文翻译：

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钢包渣和磷石膏中钙矾石基砂浆的放射学和浸出评估

摘要 在这项研究中，钙矾石基砂浆由钢包渣 (LS) 和磷石膏 (PG) 合成，促进了循环经济的概念。然而，天然存在的放射性物质 (NORM)（如 PG）的再利用需要进行放射学调查。此外，还应评估 PG 中所含污染物的固定程度。前者使用伽马光谱和氡气呼出/散发测试进行研究，而后者则根据 CEN/TS 16637-3 使用上流渗透柱测试进行评估。生产的砂浆符合现行关于建筑材料中天然存在的放射性核素 (NOR) 的立法，证明它们可以安全地用于建筑目的。随着波兰 PG 含量的增加，氡气的散发减少，这主要是由微孔率决定的。比表面积比传统水泥低20-30倍，对污染物的固定化程度普遍较高（>90%）。该研究表明，PG 在钙矾石基砂浆中的重用潜力很大。