Development of non-destructive method, developed specifically for assessing the damage in- duced by alkali-silica reaction (ASR) in concrete structures, is needed in order to carry out a systematic evaluation of the concrete condition. The aim of this study is to…
Development of non-destructive method, developed specifically for assessing the damage in- duced by alkali-silica reaction (ASR) in concrete structures, is needed in order to carry out a systematic evaluation of the concrete condition. The aim of this study is to monitor the evolution of the ASR damage in laboratory with concrete samples with NDT methods (Dynamic modulus of elasticity, Impact-Echo methods and Electrical resistivity). For this study result of Impact-Echo method were compared and correlated with expansion, mass variation. Two reactive concretes mixture were made with two kind of reactive aggregates and one other mixture incorporating non-reactive aggregate was made as a control. After 15 days, the expan- sion of non-reactive aggregate was 0.1% base on ASTM C 1260 and two kind of reactive aggregates were 0.59% and 0.44% respectively. Concrete specimens, made from aggregates sources in ARAS region, Iran, were subjected to 1 N NaOH at 38 °C. This work suggests that non-destructive techniques based on Impact- Echo and dynamic modulus of elasticity should be developed in order to evaluate the development of ASR in concrete structures. Petrographic examination confirmed the damage to concrete is associated with ASR.