Diagnosis of concrete structures distress due to alkali-aggregate reaction

Z. Owsiak, J. Zapała-Sławeta, P. Czapik
2015 Bulletin of the Polish Academy of Sciences: Technical Sciences  
Damage and defects observed in concrete elements, such as a network of microcracks, popouts and eflorrescence can be caused by a variety of deleterious processes. The causes can include mechanical (overloading), physical (freeze-thaw cycle) or chemical exposure (sulphate corrosion, alkali-aggregate reaction). This paper analyses distress due to alkali-silica reaction, detected in selected concrete structures. The analysed concrete elements exhibited cracking, exudations and surface popouts.
more » ... urface popouts. Identification of the presence of hydrated sodium-potassiumcalcium silicate gel can be considered the primary symptom suggestive of an alkali-silica reaction attack. Other damage-causing mechanisms can occur simultaneously.
doi:10.1515/bpasts-2015-0003 fatcat:md3ok2f3uvhd5lkxhtrrtodgri