基于低档MGO的酸水泥的开发
Ines Garcia-Lodeiro1, Salma Chhaiba1, Nuria Husillos-Rodriguez1
1Eduardo Torroja Institute for Construction Science (IETcc-CSIC), 28033 Madrid, Spain.
Materials (Basel, Switzerland)
|March 27, 2025
概括
这项研究表明,低质量的可以用于制造可持续的酸水泥 (MKPC). 这些水泥具有良好的机械性能和稳定的矿物质,使其适合放射性废物封闭.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 可持续的建筑材料 可持续的建筑材料
背景情况:
- 酸水泥 (MPC) 是一种先进的无机材料,在放射性废物封闭中具有应用.
- 传统的MPC使用高纯度的死烧 (DBM),其生产需要大量的能量.
- 作为废弃物副产品的低质量的,为降低成本和提高可持续性提供了机会.
研究的目的:
- 调查在生产酸水泥 (MKPCs) 中使用低级 (≈58%MgO) 的可行性.
- 评估与酸盐 (M/P) 摩尔比率和相对湿度 (RH) 对水泥性能的影响.
- 评估这些环保水泥在放射性废物固定中的潜力.
主要方法:
- 使用低等级的和酸盐来源制备MKPC.
- 机械性能 (压力强度),微观结构的发展和矿物质成分的表征.
- 在一年的时间内,M/P比率和固化条件 (包括相对湿度) 的系统变化.
主要成果:
- 低级MGO被证实是MKPC生产的可行前体.
- 在低级MgO中存在小相并不会阻碍K-struvite (KMgPO4·6H2O) 的形成.
- 水泥开发受到M/P比率和RH的显著影响;M/P比率为3产生了最佳结果.
结论:
- 从低质量的制成的MKPC为传统水泥提供了具有成本效益和可持续性的替代品.
- 具有M/P比率为3的水泥表现出理想的压力强度,低孔隙性和矿物学稳定性.
- 这些特性使得开发的MKPC成为放射性废物封闭应用的有希望的候选者.
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