增强型地质聚合物的制备

为了改善地质聚合物的力学性能，采用偏高岭土为原料，液体水玻璃和氢氧化钠作为碱激发剂，三聚磷酸铝为促进剂，制备了增强型地质聚合物. 对增强型地质聚合物进行了X-射线衍射、扫描电子显微镜、热失重分析、抗压强度等表征，研究促进剂对地质聚合物结构和抗压强度的影响. 结果显示促进剂参与了聚合反应，并且进入到地质聚合物的结构中，使地质聚合物的凝胶相向颗粒状转变；而且，促进剂的加入显著提高了地质聚合物的抗压强度. 与未加促进剂的地质聚合物的77 MPa抗压强度相比，当添加0.5%的促进剂，增强型地质聚合物的抗压强度为156 MPa，增加了102.6%.

Preparation of Reinforced Geopolymer

To improve the mechanical properties of geopolymer， we prepared the reinforced geopolymers by using metakaolin as raw materials， liquid sodium silicate/sodium hydroxide as alkali activator， and aluminium triphosphate as accelerant at low temperatures. The effect of accelerant on the microstructure and the mechanical properties was investigated by X-ray diffraction， Scanning electron microscopy， thermogravimetic analysis， and compressive strength testing. The results indicate that the accelerant can transfer the gel phase of geopolymer to particle state due to participating in geopolymerization reaction， and incorporating into the structure of geopolymer. Moreover， the incorporation of accelerant significantly improves the compressive strength of geopolymer. The compressive strength of reinforced geopolymer with 0.5% accelerant reaches 156 MPa， increasing 102.6% compared to 77 MPa of geopolymer without accelerant.