期刊论文

中文

金属矿山

1001-1250

2019

4

41-47

10.19614/j.cnki.jsks.201904009

国家自然科学基金面上项目(编号:11475081,11875164) 湖南省教育厅优秀青年项目(编号:17B228) 铀矿冶放射性控制技术湖南省工程研究中心、湖南省铀尾矿库退役治理工程技术研究中心联合开放课题(编号:2018YKZX1004) 2018年南华大学研究生科学基金项目(编号:2018KYY130)。

本校为第一机构

铀尾矿水泥固化过程中,经常会遇到混合不均匀而导致强度较低、氡析出率高等问题。为了改善固化体的性能,在固化体中掺入一些其他固化材料,例如粒化高炉矿渣、粉煤灰和生石灰等。通过调整固化体中掺合料的种类、掺量和养护龄期,测试铀尾矿水泥固化体的饱和含水率、力学强度和氡析出率等性能。实验结果表明:单掺粒化高炉矿渣、粉煤灰和生石灰时,铀尾矿固化体7 d、14 d和28 d龄期抗压强度、抗拉强度和抗剪强度均有所提高;从力学性能考虑,效果最好的是养护28 d掺量为25%粒化高炉矿渣固化体,其饱和含水率也最低;掺量越大氡析出率越低,但是效果最好的是掺入25%的粒化高炉矿渣,其次是掺入25%的粉煤灰。...

In the process of cement solidification of uranium tailings, uneven mixing often leads to low strength and high radon exhalation rate. In order to improve the properties of the solidified body, some other solidified materials such as granulated blast furnace slag, fly ash and quicklime were added into the solidified body. The saturated water content, mechanical strength and radon exhalation rate of uranium tailings cement solidified body were tested by adjusting the type, dosage and curing age of the admixtures in the solidified body. The experimental results showed that the compressive streng...