【摘要】 为解决重金属与有机物复合污染及高污染水平下水泥强度低等问题，用矿渣地质聚合物逐步代替水泥固化重金属Zn²⁺及苯酚复合污染土，分析研究养护龄期、污染浓度及矿渣地质聚合物掺量对固化土无侧限抗压强度的影响，并结合扫描电镜和X射线衍射测试微观分析固化机制。试验结果表明，地质聚合物的掺入明显提高水泥固化土无侧限抗压强度，当取代80%水泥时，28 d污染浓度Ⅰ的固化土抗压强度达到1.375 MPa；延长龄期水化产物数量增加，固化土中孔隙被填充，28 d龄期的固化土抗压强度是7 d的1.26～2.72倍；污染浓度由Ⅰ加重到Ⅲ，胶结性水化产物生成条件被破坏，产物数量下降使得结构胶结性变差，抗压强度下降，水化产生的四方钠沸石和斜方钙沸石其使结构致密提升整体性，增大了抗压强度。更多还原

【Abstract】 In order to solve the problems of heavy metal and organic compound pollution and low cement strength under high pollution levels, slag geopolymer was used to gradually replace cement to solidify heavy metal Zn²⁺ and phenol compound polluted soil. The effects of curing age, pollution concentration and slag geopolymer content on the unconfined compressive strength of solidified soil were analyzed and studied. The solidification mechanism was analyzed by scanning electron microscopy and X-ray diffraction. The test results show that the incorporation of geopolymer significantly improves the unconfined compressive strength of cement-stabilized soil. When 80% cement is replaced, the compressive strength of solidified soil with pollution concentration Ⅰ at 28 d reaches 1.375 MPa. The number of hydration products increased at the extension age, and the pores in the solidified soil were filled. The compressive strength of the solidified soil at 28 d age was 1.26～22.72 times that of the solidified soil at 7 d age. When the pollution concentration increased from Ⅰ to Ⅲ, the formation conditions of cementation hydration products were destroyed. The decrease in the number of products made the structure cementation worse, and the compressive strength decreased. The tetragonal sodium zeolite and clinocalcite produced by hydration made the structure compact and improved the integrity, and increased the compressive strength.更多还原