摘要
将硫铁矿石分别浸泡在模拟混凝土孔溶液、含氯盐溶液和硫酸钠溶液中进行养护,溶液温度分别为20℃和80℃,并通入空气。采用XRD测试手段,分别研究了硫铁矿在模拟混凝土环境中的物相变化情况,以及在有氯离子和硫酸盐存在时的物相变化。研究结果显示,硫铁矿在混凝土环境中不能稳定存在,会发生氧化还原反应,反应生成的产物与硫铁矿所处的环境有关。
Pyrite was immersed in simulated concrete pore solution, chloride solution and sodium sulfate solution respectively. The solution temperature was 20 ℃ and 80 ℃ respectively, and the air was introduced into the solution. The phase transformation of pyrite in simulated concrete environment and in the presence of chloride ion and sulfate were investigated by XRD. The results show that pyrite can not exist stably in concrete environment, and redox reaction will take place. The products produced by the reaction are related to the environment in which pyrite is located.
作者
陈向娟
封孝信
赵子远
刘刚
安宇坤
CHEN Xiang-juan;FENG Xiao-xin;ZHAO Zi-yuan;LIU Gang;AN Yu-kun(Hebei Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan Hebei 063210, China)
出处
《华北理工大学学报（自然科学版）》
CAS
2019年第3期68-75,共8页
Journal of North China University of Science and Technology：Natural Science Edition
基金
国家自然科学基金项目(51772098)
关键词
混凝土
硫铁矿
骨料
物相变化
concrete
pyrite
aggregate
phase transformation
