【摘要】 以固体废弃物海排灰为主要原料,附以少量多种矿物复合而成的成岩剂,配制并研究了一种大掺量海排灰胶凝材料。运用X射线衍射(XRD)、扫描电子显微镜(SEM)和傅立叶变换红外分析(FTIR)等手段研究了胶凝材料的不同龄期水化产物与浆体结构。结果表明:钙矾石是海排灰胶凝材料的早期强度主要来源之一;胶凝材料水化产物除了部分链状CSH凝胶外,主要以聚合度更高的架状硅氧四面体凝胶存在;随着水化的进行,Ca(OH)2含量逐渐降低,硅氧四面体的聚合度逐渐增高,浆体结构越来越致密。更多还原

【Abstract】 A kind of cementing material with a mass proportion of sea-discharged ash(SDA) is prepared with solid SDA as the main raw material and a small amount of rock forming agent composited by several minerals.Its hydrates and paste structures at different ages are analyzed using XRD,SEM and FTIR.The results show that ettringite is one of the main sources for the early strength of this cementing material;its hydrates mainly occur in frame-structural silicon oxygen tetrahedral gel with high polymerization degree,in addition to some chain-structural CSH gel;and with the hydration going on,the content of Ca(OH)2 decreases gradually along with an increase in the polymerization degree of silicon oxygen tetrahedron and a gradually denser paste structure.更多还原