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Analysis of the Concrete Strength versus Ultrasonic Pulse Velocity Relationship
Figure 1-3
Figure 1
Figure 1 - Graphic representation of the strength velocity of concrete increasing with age much more after one day than the pulse velocity of the concrete.
Figure 2
Figure 2 - Separate models for the one day strength f1 (dotted line) and for the seven day strength f7 (continuous line) fit the experimental data (squares and triangles, respectively) better than a single model would (single straight line, not shown) for both ages.
Figure 3
Figure 3 - The use of (a) surface wave velocity vR instead of (b) longitudinal wave velocity vL reduced the standard error of fit (SEF) by 25 percent; for (a), SEF = 2.658 MPa, RSEF = 15.87 percent, DF = -0.158 MPa and the number of points = 45; for (b), SEF = 3.569 MPa, RSEF = 21.67 percent, DF = -0.433 MPa and the number of points = 45.
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