活性化地质聚合物的耐用性评估 有机液体废弃物固定化矩阵
Rosa Lo Frano1, Salvatore Angelo Cancemi1, Eleonora Stefanelli1
1Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 2, 56122 Pisa, Italy.
Materials (Basel, Switzerland)
|July 12, 2025
概括
活性地质聚合物显示出对固定放射性废物的承诺. 高炉渣配方在老化后表现出优越的耐热性和耐久性,确保了安全的废物制.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 环境工程 环境工程
背景情况:
- 放射性液态有机废物 (RLOW) 需要安全固定.
- 活性地质聚合物为传统水泥材料提供了可持续的替代品.
- 评估地质聚合物在恶劣条件下的性能对于废物管理至关重要.
研究的目的:
- 评估地质聚合物配方的机械和微观结构耐用性,用于RLOW固定.
- 研究热老化 (火和循环) 对地质聚合物性能的影响.
- 为了确定最佳的地质聚合物组合物,用于放射性废弃物的制.
主要方法:
- 测试了三种地质聚合物配方:甲 (MK),高炉渣 (BFS) 和三元混合物 (MIX).
- 标本经历了热老化,包括暴露于火 (800°C) 和周期性气候条件 (-20~40°C).
- 鉴定包括热重力测量分析 (TGA),压缩测试和SEM-EDS.
主要成果:
- 装满油的标本在循环老化后显示出显著的退化.
- 暴露于火灾的空白矩阵保持了部分机械完整性.
- 基于BFS的地质聚合物由于C-A-S-H凝形成而表现出最高的耐热性.
结论:
- 优化的地质聚合物配方,特别是基于BFS的配方,适用于安全的RLOW固定.
- 地质聚合物证明了放射性废物的可持续和符合监管的直接调节的潜力.
- 在热应力下了解地质聚合物降解机制是长期废物管理解决方案的关键.
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