矿渣-粉煤灰基地质聚合物性能与微观结构的研究

摘要

The effects of slag content on rheological, strength and mechanism of fly ash based geopolymers were investigated. The result indicates that the viscosity of geopolymers slurry increases with the increase of slag content. The existing of slag improve the strength of geopolymers obviously especially at early ages. The strength of the sample containing 30% slag is the highest after curing for 28 days. It is proved that the production of slag contains calcium silicate hydrate ( C-S-H) with the analyses of X-ray diffraction, scanning electron microscope, and Fourier transform infrared. C-S-H and hydrate sodium silicoaluminate play an important role in the improving of the performance of slag-fly ash based geopolymers.%本文重点研究了不同矿渣掺量对循环流化床粉煤灰基地质聚合物流变性能和强度的影响，以及矿渣-粉煤灰复合地质聚合的反应机理。矿渣的加入增加了地质聚合物浆体的粘度，且浆体粘度随着矿渣掺量的增加而增大。矿渣的加入明显增加了地质聚合物的强度，其中对早期强度的提高尤为明显，当矿渣掺量为30％时28d强度提高最为明显。 X射线衍射，扫描电子显微镜和红外光谱分析证明矿渣的反应产物中有水化硅酸钙（ C-S-H）生成，矿渣-粉煤灰基地质聚合物性能的提高来源于C-S-H和水化硅铝酸钠（ N-A-S-H）的共同作用。