TY - GEN
T1 - Wave mixing technique for nondestructive assessment of alkali-silica reaction damage in concrete prism samples
AU - Ju, Taeho
AU - Achenbach, Jan D.
AU - Cusatis, Gianluca
AU - Jacobs, Laurence J.
AU - Qu, Jianmin
N1 - Publisher Copyright:
© 2019 Author(s).
PY - 2019/5/8
Y1 - 2019/5/8
N2 - Alkali-silica reaction (ASR) is a deterioration mechanism in concrete that degrades the concrete's strength over time. In a humid environment, concrete may absorb moisture from the surrounding environment. As the absorbed moisture diffuses through the concrete, the ASR gel expands its volume and such volumetric expansion of the ASR gel produces large internal pressure, which may then cause microcracking of the concrete. In this study, we proposed a collinear wave mixing technique with two longitudinal waves to nondestructively evaluate (NDE) the damage induced by ASR in concrete. For experiments, we produced three ASR reactive samples and the other three non-reactive samples. Next, all samples were aged at 38 C° to induce ASR damages. A linear and a nonlinear ultrasonic technique were employed on the concrete prism samples after 30 days and 120 days of aging. Destructive tests were also carried out for the benchmark data of the proposed technique. The result shows the changes in wave velocities are not sufficient or sensitive enough to discern ASR damages. On the other hand, the acoustic nonlinearity parameter shows obvious difference between damaged and non-damaged samples. This result corelates well with the degradation of compressive strength, and thus can be used as a measure of ASR damage for NDE purposes.
AB - Alkali-silica reaction (ASR) is a deterioration mechanism in concrete that degrades the concrete's strength over time. In a humid environment, concrete may absorb moisture from the surrounding environment. As the absorbed moisture diffuses through the concrete, the ASR gel expands its volume and such volumetric expansion of the ASR gel produces large internal pressure, which may then cause microcracking of the concrete. In this study, we proposed a collinear wave mixing technique with two longitudinal waves to nondestructively evaluate (NDE) the damage induced by ASR in concrete. For experiments, we produced three ASR reactive samples and the other three non-reactive samples. Next, all samples were aged at 38 C° to induce ASR damages. A linear and a nonlinear ultrasonic technique were employed on the concrete prism samples after 30 days and 120 days of aging. Destructive tests were also carried out for the benchmark data of the proposed technique. The result shows the changes in wave velocities are not sufficient or sensitive enough to discern ASR damages. On the other hand, the acoustic nonlinearity parameter shows obvious difference between damaged and non-damaged samples. This result corelates well with the degradation of compressive strength, and thus can be used as a measure of ASR damage for NDE purposes.
UR - http://www.scopus.com/inward/record.url?scp=85066064038&partnerID=8YFLogxK
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U2 - 10.1063/1.5099841
DO - 10.1063/1.5099841
M3 - Conference contribution
AN - SCOPUS:85066064038
T3 - AIP Conference Proceedings
BT - 45th Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 38
A2 - Laflamme, Simon
A2 - Holland, Stephen
A2 - Bond, Leonard J.
T2 - 45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018
Y2 - 15 July 2018 through 19 July 2018
ER -