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| 玄武岩纤维和聚氨酯对地聚物防控屏障防渗性能的影响 |
| Effects of Basalt Fiber and Polyurethane on the Impermeability of Geopolymer based Contaminant Containment |
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| DOI： |
| 中文关键词: 玄武岩纤维 聚氨酯 联合改性 地聚物 防渗性能 |
| 英文关键词: Basalt fiber Polyurethane Modification Geopolymer Impermeability |
| 基金项目:国家重点研发计划基金资助项目（2022YFC3702500，2019YFC1804000）；江苏省环境工程重点实验室自主课题基金资助项目（ZX2023003）；中国博士后科学基金资助项目（2022M711397，2024T170359） |
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| 中文摘要: |
| 通过抗渗压力、渗透系数测试及孔隙结构分析，研究了玄武岩纤维和聚氨酯联合改性对地聚物应急防控屏障（GCC）防渗性能的影响。结果表明：玄武岩纤维、聚氨酯能够提升地聚物应急防控屏障的防渗性能，当玄武岩纤维掺量＞04%、聚氨酯掺量＞4%时，两者表现出协同作用，当玄武岩纤维掺量为08%、聚氨酯掺量为8%时，防控屏障抗渗压力增加114倍；当玄武岩纤维掺量为06%、聚氨酯掺量为6%时，防控屏障渗透系数降低约2个数量级，且随着二者掺量继续增加，防控屏障渗透系数不再显著变化，玄武岩纤维、聚氨酯通过调控防控屏障试样内孔隙分布改善其防渗性能，中大孔隙对试样抗渗压力影响显著，所有孔隙均影响试样渗透系数。 |
| 英文摘要: |
| In this study,impermeability pressure,permeability coefficient tests,pore distribution were conducted to assess the effects of basalt fiber and polyurethane modification on the impermeability performance of geopolymer 〖JP2〗based contaminant containment（GCC）.The findings indicated that basalt fiber and polyurethane could enhance the impermeability of GCC.When the basalt fiber content exceeded 04% and the polyurethane content exceeds 4%,these two modifiers exhibited a synergistic effect.Specifically,at a basalt fiber content of 08% and a polyurethane content of 8%,the impermeability pressure resistance of GCC increased by 114 times.Meanwhile,at a basalt fiber content of 06% and a polyurethane content of 6%,the permeability coefficient decreased by approximately two orders of magnitude. Further increases in the contents of both modifiers did not lead to significant additional changes in the permeability coefficient.Microstructural analysis reveals that the improvement in impermeability performance is 〖GK!87mm〗primarily attributed to variation in pore distribution of GCC.Specifically,medium and large pores exerted significant effects on impermeability pressure,while all the pores contributed to the variation in permeability coefficient. |
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