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将富含Si、Ca的白钨尾矿和富含Si、Al的偏高岭土复合作为硅铝原料(基质),在水玻璃激发作用下制备地聚合物砂浆,以调整骨料掺量与级配的方式去优化试样的早期抗压强度;并借助XRD和SEM-EDS对优选试样的微结构进行表征。结果表明:当骨料掺量为50%时,产生高强度砂浆试样的个数最多;当骨料掺量为40%,且细、中、粗骨料在总骨料中分别占10%、60%、30%时,试样的早期抗压强度获得最高值26.7 MPa;在对硅铝原料进行的活化预处理和水玻璃激发以及对砂浆试样进行的蒸压养护之后,硅铝原料中的Si、Al、Ca等元素得以部分溶出,参与形成地聚合物凝胶体,赋予砂浆试样良好的早期强度性能。
The Si, Ca-rich scheelite tailings and Si, Al-enriched metakaolin as a composite material of silica and alumina (matrix) prepared under the excitation of water glass polymer mortar to adjust the amount of aggregate and grading To optimize the early compressive strength of the sample. The microstructure of the preferred sample was characterized by XRD and SEM-EDS. The results show that when the content of aggregate is 50%, the number of samples with high strength mortar is the most. When the content of aggregate is 40%, the content of fine, medium and coarse aggregate accounts for 10% , 60%, 30%, the highest compressive strength of the sample obtained the highest value of 26.7 MPa; after activation pretreatment of silicoaluminum raw material and water glass excitation and autoclaved mortar samples, In the Si, Al, Ca and other elements to be partially dissolved, to participate in the formation of polymer gel, give the mortar sample good early strength properties.