Resistance of alkali-activated binders to organic acid attack: Assessment of evaluation criteria and damage mechanisms

This paper summarizes the results of investigations into the material resistance of mortars and concretes based on alkali-activated binders (AABs) under organic acid attack (acetic, propionic, lactic acid with pH ≈ 3). The development of the residual strength, degradation depth and mass loss over time were recorded after six, twelve and 18 weeks of storage. Additionally, the damage mechanisms were examined by different imaging techniques, mainly...