ABSTRACT The mechanical properties and durability parameters such as wet-dry cycles, water sorptivity, efflorescence and acid resistance of geopolymer concrete synthesized from fly ash of three different origins were evaluated. Scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction tests were conducted to examine the microstructure and mineralogical changes. It has been observed that the performance of geopolymer concrete containing fly ash with more glass content was better. The concrete samples were exposed to atmosphere for 180 days under a wide range of temperature (11o to 39oC) and relative humidity (42 to 82%). But the efflorescence was very low and the compressive strength deterioration was <10% from reference sample kept under controlled condition. This indicates good durability characteristic of fly ash based geopolymer concrete. GRAPHICAL ABSTRACT

中文翻译：

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以底灰为细骨料的粉煤灰-GGBFS地质聚合物混凝土的耐久性和力学性能

摘要 评估了由三种不同来源的粉煤灰合成的地质聚合物混凝土的机械性能和耐久性参数，如干湿循环、吸水率、风化和耐酸性。进行了具有能量色散X射线光谱和X射线衍射测试的扫描电子显微镜检查显微结构和矿物学变化。已经观察到，含有更多玻璃含量的粉煤灰的地质聚合物混凝土的性能更好。混凝土样品在较宽的温度范围（11o 至 39oC）和相对湿度（42 至 82%）下暴露于大气中 180 天。但是风化非常低，并且与保持在受控条件下的参考样品相比，抗压强度劣化<10%。这表明粉煤灰基地质聚合物混凝土具有良好的耐久性特性。图形概要