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以镍铁渣为主要原料,通过碱激发制备了地质聚合物胶凝材料。采用正交试验研究了工艺参数对地质聚合物抗压强度的影响,研究结果表明:在水玻璃模数为2.4、碱性激发剂掺量为12%和水灰比为0.28时,制备的地质聚合物28 d抗压强度高达97.62MPa,并且具有良好的耐久性。由XRD可知,镍铁渣地质聚合物中有无定型硅铝酸盐相生成,表明发生了水化反应。FTIR表明,生成了Si-O-T(Si,Al)和Al-O-Si三维网络结构。SEM微观形貌分析显示,所制备镍铁渣地质聚合物的孔隙率较低,结构致密。
Nickel-iron slag as the main raw material, prepared by geopotential geopolymer gelling material. The effects of technological parameters on the compressive strength of geopolymer were studied by orthogonal experiments. The results show that the geology of the prepared geopolymer can be improved with the water glass modulus of 2.4, the content of alkaline activator of 12% and the water-cement ratio of 0.28 Polymer 28 d compressive strength of up to 97.62MPa, and has good durability. From XRD, it can be seen that there is amorphous aluminosilicate phase in the Ni-Fe slag geological polymer, indicating hydration reaction occurred. FTIR shows that three-dimensional network structures of Si-O-T (Si, Al) and Al-O-Si have been formed. The SEM micrographs show that the Ni-Fe slag geological polymer has lower porosity and compact structure.