Abstract Geopolymer (GP) binders are an appealing alternative to Portland cement (PC) binders as they have the potential to reduce the CO2 emissions associated with the cement and concrete industry. However, their durability in aggressive environments needs thorough examination if they are to become a viable alternative to traditional PC materials. This study investigated the effect of increasing slag content and activator dosage on the sulfuric acid resistance of fly ash GP binders. Their performance was also compared with that of neat PC mixes using various physical and microstructural techniques. The results show that increasing the slag content of fly ash GPs decreases porosity, but makes the reaction products more susceptible to sulfuric acid attack. It was also found that increasing the alkaline activator dosage of fly ash GPs has little impact on sulfuric acid resistance. Finally, GP binders displayed superior sulfuric acid resistance than their PC counterparts.

中文翻译：

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矿渣含量和活化剂用量对粉煤灰地质聚合物粘合剂抗硫酸侵蚀性能的影响

摘要 地质聚合物 (GP) 粘合剂是波特兰水泥 (PC) 粘合剂的一种有吸引力的替代品，因为它们有可能减少与水泥和混凝土行业相关的 CO2 排放。然而，如果它们要成为传统 PC 材料的可行替代品，它们在恶劣环境中的耐用性需要彻底检查。本研究调查了增加炉渣含量和活化剂用量对粉煤灰 GP 粘合剂耐硫酸性的影响。还使用各种物理和微观结构技术将它们的性能与纯 PC 混合物的性能进行了比较。结果表明，增加粉煤灰GPs的炉渣含量会降低孔隙率，但会使反应产物更容易受到硫酸的侵蚀。还发现增加粉煤灰GPs的碱性活化剂用量对耐硫酸性影响不大。最后，GP 粘合剂显示出比 PC 粘合剂更好的耐硫酸性。