摘要
实验研究了碱矿渣粘土复合水泥(AASCM)固化模拟放射性泥浆的可行性。结果表明:模拟泥浆掺量、水胶比对AASCM与模拟泥浆拌合物的流动度以及温度对拌合物的凝结时间影响较大,实验用阴离子的种类对凝结时间影响较小。该水泥应用于固化工程时,宜在低于20℃的条件下施工。当胶砂比为1∶1、水胶比为0.45、模拟泥浆掺量为20%时,拌合物的流动度能满足施工要求,固化体的抗压强度满足GB14569.1—93要求,其固化体的浸出率较普通硅酸盐水泥的低。硅灰能够改善AASCM与模拟泥浆拌合物的和易性及降低其固化体的浸出率。
The feasibility of immobilizing simulated radioactive slurry (SRS) by alkali-activated slag-clay minerals composite cement (AASCM) was studied under the experimental conditions. The results show that the flowability of the mixture of AASCM and SRS is highly dependent on the dosage of SRS and water cement ratio and the setting time is more dependent on temperature but less dependent on sorts of anions in the experiment. The application of AASCM in solidification engineering is suitable below 20°C. When cement-sand ratio is 1:1 and water-cement ratio is 0.45, the flowability of the mixture meets the case of solidification engineering and the compressive strength of the waste forms containing 20% SRS meets the needs of GB 14569.1-93. The leaching rate of AASCM based waste forms is lower than that of ordinary Portland cement (OPC) based waste forms. Silicon fume can improve the workability of the mixture of AASCM and SRS and decrease the leaching rate of waste forms based on AASCM as well.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2005年第4期311-317,共7页
Atomic Energy Science and Technology
基金
国家自然科学基金委员会和中国工程物理研究院联合基金资助项目(10376028)
中国工程物理研究院核物理与化学研究所基金资助项目
关键词
碱矿渣-粘土复合水泥
模拟放射性泥浆
可行性
固化
Cements
Compressive strength
Flow of fluids
Nuclear fuels
Nuclear industry
Radioactive wastes
Solidification
