重庆大学学报2025，Vol.48Issue(2)：102-109,8.DOI:10.11835/j.issn.1000-582X.2024.267
铜渣基铁系草酸盐水泥热稳定性研究
Performance of copper slag based ferrous oxalate cement after exposure to elevated temperatures
摘要
Abstract
Copper slag based ferrous oxalate cement(CS-FOC)exhibits significant potential for applications in high temperature kiln repair and nuclear waste stabilization/solidification,owing to its rapid setting properties and high early-age strength.This study comprehensively investigates the evolution of properties,phase compositions,and structure of CS-FOC following exposure to elevated temperatures(150～1 000℃),building on prior research.The results show that CS-FOC achieves a compressive strength of 55.1 MPa after 28 days of natural curing,primarily composed of newly-formed ferrous oxalate dihydrate(FeC2O4·2H2O)and unreacted fayalite(Fe2SiO4).Exposure to elevated temperatures induces regular changes in both the compressive strength and structural integrity of CS-FOC.At temperatures exceeding 250℃,FeC2O4·2H2O decomposes into iron oxide,leading to structural degradation and a consequent reduction in strength.Despite this,the material maintains a stable compressive strength of about 15 MPa after exposure to temperatures as high as 1 000℃.These findings highlight the superior thermal stability of CS-FOC,alongside its ability to retain a relatively high compressive strength under extreme thermal conditions.关键词
铜渣/铁系草酸盐水泥/热稳定性/抗压强度Key words
copper slag/ferrous oxalate cement/thermal stability/compressive strength分类
土木建筑引用本文复制引用
田鑫聪,杜新,何欢,周新涛,罗中秋..铜渣基铁系草酸盐水泥热稳定性研究[J].重庆大学学报,2025,48(2):102-109,8.基金项目
国家自然科学基金资助项目(22366023) （22366023）
昆明理工大学分析测试基金资助项目(2023T20130126).Supported by National Natural Science Foundation of China(22366023),and Analysis&Test Foundation of Kunming University of Science and Technology(2023T20130126). （2023T20130126）
