Various additives for improving the performances of solidified forms of radioactive wastes by cementation technology: Recent advances and perspectives

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-09-19 DOI:10.1016/j.nucengdes.2024.113595

Lei Chen , Junfeng Li , Jianlong Wang

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Abstract

The additives are crucial for improving the performance of the solidified forms of radioactive wastes by cementation technology. This paper reviewed the recent research advances in improving the cement and waste solidification performances using various additives, including the traditional pozzolanic active substances, biochar, fibers, nanomaterials and water reducer. The enhanced effect of various additives on the compressive strength, flexural strength, and nuclide leaching resistance, which belong to the performance requirements of the radioactive waste cement solidified forms, was summarized and analyzed. Silica fume, slag and fly ash can provide higher compressive strength, while zeolite, metakaolin, bentonite and activated carbon can reduce nuclide leaching. Fibers can significantly increase the flexural strength. Nanomaterials can provide superior mechanical properties, but currently there is little research and application in the waste cementation field. The water reducer can provide the necessary fluidity for the above multiple cement-based mixed materials. This review will deepen the understanding of solidification of radioactive waste and provide references for specific cementation formulations.

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通过胶结技术改善放射性废物固化形式性能的各种添加剂：最新进展和前景

添加剂对于利用固结技术改善放射性废物固化形式的性能至关重要。本文综述了近年来利用各种添加剂改善水泥和废物固化性能的研究进展，包括传统的胶凝活性物质、生物炭、纤维、纳米材料和减水剂。总结分析了各种添加剂对放射性废物水泥固化形式性能要求中的抗压强度、抗折强度和抗核素浸出性能的增强作用。硅灰、矿渣和粉煤灰可提供较高的抗压强度，而沸石、偏高岭土、膨润土和活性炭则可减少核素沥滤。纤维可大大提高抗折强度。纳米材料可提供卓越的机械性能，但目前在废物固化领域的研究和应用还很少。减水剂可为上述多种水泥基混合材料提供必要的流动性。本综述将加深对放射性废物固化的理解，并为具体的固化配方提供参考。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.