用砒砂岩制备地聚物材料的研究

Preparation of Geopolymeric Materials by Pisha Sandstone

摘要:

通过抗压强度、X射线衍射(XRD)、红外光谱(IR)、压汞(MIP)和扫描电镜(SEM)测试，分析了砒砂岩地聚物材料的力学性能、反应产物及微观结构，讨论了粉煤灰掺量、养护龄期对砒砂岩地聚物材料力学性能及微观结构的影响.结果表明：粉煤灰掺量和养护龄期对砒砂岩地聚物材料的抗压强度、孔隙结构有较为显著的影响，粉煤灰掺量为13%(质量分数)时，砒砂岩地聚物材料的90d抗压强度可达203MPa，其孔隙率减小，孔隙结构得到明显改善.砒砂岩地聚物材料的反应产物主要为无定型水化硅铝酸钙类凝胶.

Abstract:

The experiment of compressive strength was carried out to evaluate the mechanical performance of the Pisha sandstone geopolymeric materials, and XRD, IR, MIP and SEM were used to analyze the effect of fly ash content and curing age on the microstructure and compressive strength of Pisha sandstone geopolymeric materials respectively. The results show that the mechanical property and pore structure of the Pisha sandstone geopolymeric materials will be significantly influenced by fly ash content and curing age. The compressive strength of Pisha sandstone geopolymeric materials is 203MPa when fly ash content is 13%(by mass) at 90d, the porosity was decreased and the pore structure was enhanced. The analysis results from XRD, IR and SEM show that the main hydration reaction product of Pisha sandstone geopolymeric materials is an amorphous C A S H gel.