文章信息/Info

Title:

The effects of mineral admixtures in cementation of radioactive spent resin

作者:

李聰1 孫奇娜1 * 徐計1 李俊峰2

(1燕山大學 河北省應用化學重點實驗室 環境與化學工程學院
2清華大學 核能與新能源技術研究院 環境技術研究室

Author(s):

LI Cong1;  SUN Qina1 *;  XU Ji1;  LI Junfeng2

（1 Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University,
2 Laboratory of Environmental technology, Institute of Nuclear and New Energy Technology, Tsinghua University

關鍵詞:

水泥固化; 放射性廢物; 礦物混合材; 水化活性

DOI:

10.7502/j.issn.1674-3962.2016.07.05

文獻標志碼:

A

摘要:

水泥固化是核電站放射性廢物處理的常用技術，在放射性廢物的水泥固化過程中，礦物混合材對于固化操作性、固化體機械性能及核素浸出性等方面表現出重要影響。本文綜述了活性和非活性礦物混合材的特性，及其在典型放射性廢物——放射性廢樹脂水泥固化中的應用和對固化體性能的具體作用。活性礦物混合材的形態效應、火山灰效應和微集料效應以及非活性礦物混合材的填充作用可改善水泥固化體性能，降低水泥水化熱升溫，提高固化體抗壓強度，抗裂性和耐久性，降低核素浸出率。混合材種類和摻加比例極大地影響固化效果，通過配方實驗保證混合材的適當摻量，可以保證水泥固化體性能的提升，保證固化體在處置期間的長期穩定性。

Abstract:

Cementation is one of the commonly used techniques for radioactive wastes treatment. In the process of radioactive waste cementation, mineral admixtures have significantly positive effects on operational property, mechanical property and nuclides leaching ability. In this paper, the properties of active and non-active mineral admixtures, the application of mineral admixtures in radioactive resins cementation and the effects on waste-forms properties were reviewed. The morpha effect, pozzolanic activity, micro aggregate effect of activemineral admixtures and filling effect of non-active mineral admixtures enhanced the properties of cement-solidified waste-forms, which involves lower hydration heat during cement solidification, higher compressive strength, crack resistance and durability, and reduced nuclides leaching ability. Different admixtures and blending amounts affected cementation tremendously; therefore, formula experiments were crucial to obtain appropriate blending amounts and to guarantee enhanced mechanical properties and durability of cement-solidified waste-forms.