Zhou Ying, Wang Yue, Huang Daikuan, Cao Yang, Zhang Dabin
School of Mechanical Engineering, Guizhou University, Guiyang 550025, China.
Guizhou Research and Designing Institute of Environmental Sciences, Guiyang 550081, China.
iScience. 2025 Apr 16;28(5):112449. doi: 10.1016/j.isci.2025.112449. eCollection 2025 May 16.
KH560-modified electrolytic manganese slag (EMS)-based cementitious material (EP-K) was successfully prepared in this study through aqueous solution polymerization for use in deep grouting to repair leaking landfills. EP-K with 3 vol % KH560 exhibits higher compressive strength (125.14% higher) and lower permeability (61.29% lower) than before modification. The concentration of contaminants leached in deionized water meets safety standards. Fourier transform infrared (FTIR) and scanning electron microscope (SEM) analyses showed that the epoxy groups in KH560 reacted with the -OH groups of sodium polyacrylate to form a C-O-C structure, which enhanced the densification of the cementitious network. Also, the siloxy groups reacted with EMS to form a Si-O-Si linkage, which reduced holes and cracks. The integrated pollution indicator evaluation method was combined with the weight assignment technique to enhance evaluation efficiency and accuracy, advancing research on the performance and environmental impact of cementitious impermeable materials in solid waste landfills.
本研究通过水溶液聚合成功制备了KH560改性的电解锰渣（EMS）基胶凝材料（EP-K），用于深层注浆修复渗漏垃圾填埋场。含3 vol% KH560的EP-K表现出比改性前更高的抗压强度（高125.14%）和更低的渗透性（低61.29%）。在去离子水中浸出的污染物浓度符合安全标准。傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分析表明，KH560中的环氧基团与聚丙烯酸钠的-OH基团反应形成C-O-C结构，增强了胶凝网络的致密化。此外，硅氧基与EMS反应形成Si-O-Si键，减少了孔洞和裂缝。将综合污染指标评价方法与权重赋值技术相结合，提高了评价效率和准确性，推动了固体废物填埋场中胶凝防渗材料性能及环境影响的研究。
