水利水电科技进展2025，Vol.45Issue(6)：98-106,133,10.DOI:10.3880/j.issn.1006-7647.2025.06.014
鄱阳湖固化淤泥耐蚀性能与微观结构试验研究
Experimental study on corrosion resistance and microstructure of solidified sediment from Poyang Lake
摘要
Abstract
To address the complex characteristics of high water content and fine-grained composition in Poyang Lake sediment,composite activation technology and microstructure tests were adopted to explore the feasibility of developing solidified composite materials from Poyang Lake sediment.By incorporating industrial waste materials such as mineral powder,along with activators including Na2 SiO4,Na2SO4,Na2 CO3,and NaOH,the mechanical properties,water-erosion resistance,and freeze-thaw resistance of the solidified sediment were systematically evaluated.Combined with microstructure analysis,the regulatory mechanism of the composite activators on the performance of the solidified sediment was revealed.The results show that the addition of the composite activators promotes the formation of flocculent cementitious substances,effectively fills the pores,enhances the interparticle bonding,and optimizes the microstructure of the solidified sediment,providing a feasible technical path for the resource utilization of Poyang Lake sediment.In particular,the Na+-OH-dual-drive network formed by Na2 SiO4 and NaOH significantly promotes the depolymerization-polycondensation reaction of amorphous SiO2 and Al2O3 in the sediment,generating C-A-S-H,N-A-S-H and other alkali gels.The ordered distribution of hydration products significantly increases the 28-day compressive strength of the solidified sediment to 11.61 MPa,a 69.0%increase over the control group,while simultaneously improving water-erosion resistance and freeze-thaw resistance.关键词
固化淤泥/碱激发/耐蚀性能/微观结构/资源化利用/鄱阳湖Key words
solidified sludge/alkali excitation/corrosion resistance/microstructure/resource utilization/Poyang Lake分类
资源环境引用本文复制引用
周志美,贾东洋,邹非凡,王耀宗,王剑,李长明..鄱阳湖固化淤泥耐蚀性能与微观结构试验研究[J].水利水电科技进展,2025,45(6):98-106,133,10.基金项目
河南省高等学校重点科研项目(24A570004) （24A570004）
河南省黄河流域生态环境保护与修复重点实验室开放基金项目(LYBEPR202104) （LYBEPR202104）
