Predicting Concrete Compressive Strength and Modulus of Rupture Using Different NDT Techniques

Figure 4

Modulus of rupture versus fundamental resonance frequency in longitudinal mode in beams with dimensions of 150 mm × 150 mm × 600 mm, with w/c ratios = (a) 0.55, 0.57, 0.61, and 0.76 (concrete made in situ) and (b) 0.50 and 0.65 (concrete made in laboratory) for ages of 7 day to 28 days.

(a)

(b)