硅酸盐通报2024，Vol.43Issue(10)：3704-3714,11.
碱性水热活化选硫尾矿基地聚合物的制备及性能
Preparation and Properties of Sulfur Tailings-Based Geopolymer Activated by Alkaline Hydrothermal Method
摘要
Abstract
To solve the problem of high energy consumption in tailings pretreatment methods and explore a low energy consumption tailings activation method,alkaline hydrothermal activation pretreatment was carried out on part of sulfur tailings to enhance their activity and improve the mechanical properties of sulfur tailings-based geopolymers.The influences of activation temperature and activation time on alkaline hydrothermal activation effect have been studied.X-ray diffraction technology,Fourier transform infrared spectroscopy analysis,thermogravimetric analysis,nuclear magnetic resonance imaging analysis,and scanning electron microscopy test were used to characterize the performance of activated sulfur tailings and sulfur tailings-based geopolymers.The results show that when the sulfur tailings are activated at 200 ℃ for 2.0 h,the prepared geopolymer obtains the highest 3 and 28 d compressive strength,which are 15.5 and 22.1 MPa,respectively.Alkaline hydrothermal activation can effectively destroy the crystalline phase in sulfur tailings,promote the release of active silica and aluminum.More hydration product gel is formed in the gel system to improve the pore structure of geopolymer,thus improving the compressive strength of sulfur tailings-based geopolymers.The above experimental results indicate that alkaline hydrothermal activation is a method that can effectively improve the activity of sulfur tailings.关键词
地聚合物/选硫尾矿/碱性水热活化法/无侧限抗压强度/微观分析/物相分析Key words
geopolymer/sulfur tailing/alkaline hydrothermal activation method/unconfined compressive strength/micro analysis/phase analysis分类
资源环境引用本文复制引用
王文耀,罗琦,鲁刘磊,赖金,黄文昊,庄荣传,汪峻峰,马俊..碱性水热活化选硫尾矿基地聚合物的制备及性能[J].硅酸盐通报,2024,43(10):3704-3714,11.基金项目
海南省重点研发项目(ZDYF2022SHFZ322) （ZDYF2022SHFZ322）
广东省滨海土木工程耐久性重点实验项目(SZU)(2020B1212060074) （SZU）
