Alkali-Silica Reaction Detection Utilizing Linear and Nonlinear Resonance Frequency Shift Techniques

摘要

This study evaluated a linear and nonlinear technique used to detect and monitor ASR damage in concrete structures. By analyzing the shift in the linear resonance frequency of a material ASR damage can be clearly identified. Using linear resonance frequency, ASR detection was able to be made at approximately 60 days of exposure and a total frequency drop of 7.5% was observed. Analyzing the linear resonance frequency can show clear indication of ASR damage, but only with baseline measurements.