A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rapid assessment of alkali-silica reaction damage in cement mortars by nonlinear acoustic technique
In this work, a novel nonlinear acoustic method - nonlinear impact resonance acoustic spectroscopy (NIRAS) is developed to detect and differentiate alkali-silica reaction (ASR) in mortar samples. The shift of resonance frequency of slender mortar bars is observed with the progress of material nonlinearity caused by ASR damage. The relative resonance shift is proportional to the amplitude of impact applied on samples and slope of this linearity represents the hysteresis parameter of materials. The developed NIRAS technique is then used to distinguish aggregates with varying alkali-reactivity and it is found that NIRAS method is able to separate those aggregates very well particularly in the early age. Those results indicate a great potential of proposed NIRAS technique for the rapid assessment of ASR damage in practice.
Rapid assessment of alkali-silica reaction damage in cement mortars by nonlinear acoustic technique
In this work, a novel nonlinear acoustic method - nonlinear impact resonance acoustic spectroscopy (NIRAS) is developed to detect and differentiate alkali-silica reaction (ASR) in mortar samples. The shift of resonance frequency of slender mortar bars is observed with the progress of material nonlinearity caused by ASR damage. The relative resonance shift is proportional to the amplitude of impact applied on samples and slope of this linearity represents the hysteresis parameter of materials. The developed NIRAS technique is then used to distinguish aggregates with varying alkali-reactivity and it is found that NIRAS method is able to separate those aggregates very well particularly in the early age. Those results indicate a great potential of proposed NIRAS technique for the rapid assessment of ASR damage in practice.
Rapid assessment of alkali-silica reaction damage in cement mortars by nonlinear acoustic technique
Schnelle Bewertung von Schäden in Zementmörtel durch Alkali-Silika-Reaktion mit nicht linearen akustischen Verfahren
Chen, J. (author) / Jayapalan, A.R. (author) / Kim, J.Y. (author) / Kurtis, K.E. (author) / Jacobs, L.J. (author)
2008
7 Seiten, 8 Bilder, 9 Quellen
Conference paper
Storage medium
English
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