This paper investigates the strength development of solely ground granulated blast furnace slag geopolymers (GGBFS). An optimal combination of GGBFS with various solid/liquid and alkaline activator ratios had been determined by performing a number of compressive strength tests. It was found that GGBFS with 3.0 solid/liquid ratio and 2.5 alkaline activator ratio resulted in high compressive strength at 168.7 MPa after 28 days of curing. The microstructure analysis of the GGBFS geopolymers using SEM, FTIR and XRD revealed the formation of tobermorite and calcite (CaCO₃) phases within a three-dimensional system. In addition, an advanced characterisation non-destructive technique using the synchrotron micro-XRF was performed to reveal detail phase distribution in the system. It displayed that the calcium concentration was higher at silica and alumina regions, which described the formation of tobermorite and CaCO₃ as the contributing factor towards high compressive strength.

本文研究了纯磨碎的高炉矿渣地质聚合物（GGBFS）的强度发展。通过执行许多抗压强度试验，已确定了具有各种固/液和碱活化剂比例的GGBFS的最佳组合。发现固化28天后，固液比为3.0，碱性活化剂比为2.5的GGBFS在168.7 MPa时具有较高的抗压强度。使用SEM，FTIR和XRD对GGBFS地质聚合物进行的微观结构分析显示了钙铁矿和方解石（CaCO ₃）在三维系统中的阶段。另外，使用同步加速器微型XRF进行了先进的表征无损技术，以揭示系统中的详细相位分布。结果表明，二氧化硅和氧化铝区域的钙浓度较高，这说明形成了雪铁矿和CaCO ₃是导致高抗压强度的因素。