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Detection of Concrete Damage Using Ultrasonic Pulse Velocity Method

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Figure

Table 1: Mixture Proportions (Note: the weights  shown are in kg per 100kg of concrete)  Mixture  designation  /Ingredients  Normal  Concrete   Self  Compacting Concrete  Cement   13.33   16.3  River sand   26.67   35.5  25 mm  Aggregate   53.33   0  12.5
Table 2: Acoustic impedance values
Table 3: Measurement of Crack depths on beam  of type 1 S.  No.   Depth of  actual  crack   x   T1    T2  Crack depth  measured  (cm)   (cm)   (µs)   (µs)   (cm)  1   4.1   10   95.6   75.8   7.68  2   4.1   20   189.5   152.9   14.64
Table 4: Measurement of Crack depths on beam  of type 2  S.  No.   Depth of  actual  crack   x   T1    T2  Crack depth  measured  (cm)   (cm)   (µs)   (µs)   (cm)  1  7.1  5  60  35  6.96  2  7.1  10  80  58.4  9.36  3  7.1  20  141.5  103.7  18.56  4  7.1
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