Diagnosis of concrete structures distress due to alkali-aggregate reaction

Bulletin of the Polish Academy of Sciences. Technical Sciences

J. Zapa?a-S?awetaFaculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysi?clecia Pa?stwa Polskiego Ave., 25-314 Kielce, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  P. CzapikFaculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysi?clecia Pa?stwa Polskiego Ave., 25-314 Kielce, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Z. OwsiakCorresponding authorFaculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysi?clecia Pa?stwa Polskiego Ave., 25-314 Kielce, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Faculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysi?clecia Pa?stwa Polskiego Ave., 25-314 Kielce, Poland

关键词: Keywords : alkali-aggregate-reaction;    diagnosis;    concrete structure;   

DOI  :  10.1515/bpasts-2015-0003

学科分类：工程和技术（综合）

来源: Polska Akademia Nauk * Centrum Upowszechniania Nauki / Polish Academy of Sciences, Center for the Advancement of Science

【 摘 要 】

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. 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.

【 授权许可】

Unknown