摘要
以矽卡岩型铁尾矿、矿渣、水泥熟料和脱硫石膏为主要原料,制备掺铁尾矿胶凝材料。研究了铁尾矿掺量、水胶比和减水剂掺量对高强结构材料力学性能的影响,并利用XRD和TG-DSC对胶凝材料的水化反应机理进行了基础研究。结果表明,当铁尾矿掺量为30%、水胶比0.35、减水剂掺量0.4%时,能够制备出28 d强度达28.55 MPa的高强结构材料,胶凝材料体系中存在着多固废的协同水化反应,促进体系强度的不断增加。
Cementitious material was prepared with skarn type iron ore tailings,slag,cement clinker and desulfurization gypsum.The effects of iron tailings content,water-binder ratio and water reducing agent content on mechanical properties of high strength structural materials were studied.The mechanism of hydration reaction of cementified material was also studied with XRD and TG-DSC.The results show that when the dosage of iron ore tailing powder is 30%,the water-binder ratios is 0.35,and the dosage of water reducing agent is 0.4%,the sample with 28 d strength up to 28.55 MPa can be prepared.There is synergistic hydration reaction of multiple solid waste in the cementing material system,which can promote the strength of the system to increase continuously.
作者
崔孝炜
刘信伟
邓婉心
李峰
南宁
刘璇
CUI Xiaowei;LIU Xinwei;DENG Wanxin;LI Feng;NAN Ning;LIU Xuan(College of Chemical Engineering and Modern Materials,Shangluo University,Shangluo 726000,Shaanxi,China;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,Shaanxi,China;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo 726000,Shaanxi,China)
出处
《矿产保护与利用》
2021年第3期112-117,共6页
Conservation and Utilization of Mineral Resources
基金
陕西省自然科学基础研究计划—陕煤联合基金(2019JLM-49)
中央引导地方科技发展专项(2018ZYHM01)
商洛学院自然科学研究项目(18SKY007)。
关键词
铁尾矿
高强结构材料
力学性能
水化机理
iron ore tailings
high strength structural materials
mechanical property
hydration mechanism
