新型人造矿物聚合物的制备与机理探讨

Preparation of Artificial Geo-polymer of a New-type Environmental Function Material and Discussion on Its Mechanism

以偏高岭土、粉煤灰为原料，在碱性激活剂作用下，采用适当工艺处理，在50～100℃的较低温度下，通过化学聚合反应制备出了高性能的人造矿物聚合物。试验研究表明：当最佳氧化物摩尔比为n（Na2O）／n（SiO2）=0．30，n（SiO2）／n（Al2O3）=3．7，n（H2O）／n（N2：O）=17时，所制备的人造矿物聚合物1d抗压强度可达47．19MPa，28d抗压强度可达53．81MPa；采用X衍射、电镜扫描和红外等方法对人造矿物聚合作用的微观机理进行了探讨。

With metakaolin and fly ash as raw materials,the high performance artificial geo-polymer is prepared which results from the chemical polymerization reaction with alkaline activator at low temperature of between 50℃ and 100℃.The test results showed that when the mole ratio Na2O/SiO2 is 0.30,the mole ratio SiO2/Al2O3 is 3.7,and the mole ratio H2O/Na2O is 17 of the optimal oxides,the 1-day compressive strength of the geo-polymer can reach 47.19 MPa,and the 28-day compressive strength can reach 53.81 MPa.The microcosmic mechanisms of artificial geo-polymerization were assessed through a variety of techniques such as X-ray diffraction（XRD）,scanning Electron Microscopy（SEM） and Infrared（IR） spectroscopy.