Nondestructive Testing to Identify Delaminations Between HMA Layers, Volume 3 - Controlled Evaluation Reports (2013) / Chapter Skim
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37 Ultrasonic Tomography Testing at NCAT Pavement Test Track This chapter was prepared by Kyle Hoegh, graduate research assistant, and Dr. Lev Khazanovich both at the University of Minnesota.
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38 lane. MIRA scans were taken with the long portion of the device aperture in transverse and longitudinal orientations at various positions within the 250-ft passing lane section, as described below: • Longitudinal orientation (see Figure 5.2a)
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39 section) is valuable for diagnosis.
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40 shadowing of the backwall reflection. In this case, if the constructed layer and asphalt base are properly constructed, the backwall reflection will be absent.
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41 Analysis using SAFT-FW allows for a more comprehensive analysis of bond condition of asphalt over a concrete base and also seems to give an indication of severe lift debonding, even for cases where the newly constructed asphalt is fully bonded to the asphalt base. The use of SAFT B-scans and D-scans, as well as SAFT-FW B-scans, indicated the following bond conditions: • Concrete base (Sections 1 and 2)
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42 138.46mm 25.00us offset 2.01 mm/us138.46mm 25.00us offset 2.01 mm/us137.69mm 25.00us offset 2.01 mm/us136.92mm 25.00us offset 2.01 mm/us135.38mm 25.00us offset 2.01 mm/us 134.62mm 25.00us offset 2.01 mm/us136.15mm 25.00us offset 2.01 mm/us133.08mm 25.00us offset 2.01 mm/us131.54mm 25.00us offset 2.01 mm/us130.00mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 1 Transverse Measurement (17' - 30 khz) Figure 5.13.
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43 129.23mm 25.00us offset 2.01 mm/us 130.00mm 25.00us offset 2.01 mm/us130.77mm 25.00us offset 2.01 mm/us130.00mm 25.00us offset 2.01 mm/us129.23mm 25.00us offset 2.01 mm/us 126.92mm 25.00us offset 2.01 mm/us128.46mm 25.00us offset 2.01 mm/us125.38mm 25.00us offset 2.01 mm/us123.08mm 25.00us offset 2.01 mm/us123.85mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 1 Transverse Measurement (17' - 50 khz) Figure 5.14.
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44 126.92mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us126.15mm 25.00us offset 2.01 mm/us128.46mm 25.00us offset 2.01 mm/us126.92mm 25.00us offset 2.01 mm/us 126.15mm 25.00us offset 2.01 mm/us257.69mm 25.00us offset 2.01 mm/us126.15mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us123.08mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 2 Transverse Measurement (42' - 30 khz) Figure 5.19.
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45 126.92mm 25.00us offset 2.01 mm/us65.38 mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us75.38 mm 25.00us offset 2.01 mm/us119.23mm 25.00us offset 2.01 mm/us 119.23mm 25.00us offset 2.01 mm/us120.77mm 25.00us offset 2.01 mm/us120.77mm 25.00us offset 2.01 mm/us116.15mm 25.00us offset 2.01 mm/us242.31mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 2 Transverse Measurement (64' - 30 khz) Figure 5.22.
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46 121.54mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us314.62mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us116.92mm 25.00us offset 2.01 mm/us 110.77mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us113.08mm 25.00us offset 2.01 mm/us113.08mm 25.00us offset 2.01 mm/us113.08mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 2 Transverse Measurement (64' - 50 khz) Figure 5.23.
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47 Section 4 50.77 mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us65.38 mm 25.00us offset 2.01 mm/us92.31 mm 25.00us offset 2.01 mm/us92.31 mm 25.00us offset 2.01 mm/us 128.46mm 25.00us offset 2.01 mm/us130.77mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us131.54mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 4 into 3 Left Wheel Path Figure 5.28. SAFT-FW B-scans taken from Position 1 (~100 ft)
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48 90.77 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us333.85mm 25.00us offset 2.01 mm/us97.69 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us 97.69 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us97.69 mm 25.00us offset 2.01 mm/us97.69 mm 25.00us offset 2.01 mm/us98.46 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 4 Transverse Measurement (92' - 30 khz) Figure 5.31.
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49 Section 5 86.15 mm 25.00us offset 2.01 mm/us86.92 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us 89.23 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us86.92 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 4 Transverse Measurement (92' - 50 khz) Figure 5.32.
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50 96.92 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us92.31 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us 94.62 mm 25.00us offset 2.01 mm/us65.38 mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 5 Transverse Measurement (117' - 30 khz) Figure 5.37.
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51 88.46 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us 50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 5 Transverse Measurement (117' - 50 khz) Figure 5.38.
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52 92.31 mm 25.00us offset 2.01 mm/us65.38 mm 25.00us offset 2.01 mm/us92.31 mm 25.00us offset 2.01 mm/us65.38 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us 94.62 mm 25.00us offset 2.01 mm/us98.46 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us67.69 mm 25.00us offset 2.01 mm/us95.38 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 6 Transverse Measurement (142' - 30 khz) Figure 5.43.
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53 86.15 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us 50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us50.77 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 6 Transverse Measurement (142' - 50 khz) Figure 5.44.
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54 97.69 mm 25.00us offset 2.01 mm/us 98.46 mm 25.00us offset 2.01 mm/us 98.46 mm 25.00us offset 2.01 mm/us 96.15 mm 25.00us offset 2.01 mm/us 94.62 mm 25.00us offset 2.01 mm/us 50.77 mm 25.00us offset 2.01 mm/us 65.38 mm 25.00us offset 2.01 mm/us 65.38 mm 25.00us offset 2.01 mm/us 98.46 mm 25.00us offset 2.01 mm/us 98.46 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 7 Transverse Measurement (167' - 30 khz) Figure 5.49.
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55 87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us 87.69 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 7 Transverse Measurement (167' - 50 khz) Figure 5.50.
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56 96.15 mm 25.00us offset 2.01 mm/us96.92 mm 25.00us offset 2.01 mm/us96.15 mm 25.00us offset 2.01 mm/us96.15 mm 25.00us offset 2.01 mm/us95.38 mm 25.00us offset 2.01 mm/us 94.62 mm 25.00us offset 2.01 mm/us97.69 mm 25.00us offset 2.01 mm/us94.62 mm 25.00us offset 2.01 mm/us95.38 mm 25.00us offset 2.01 mm/us96.15 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 8 Transverse Measurement (192' - 30 khz) Figure 5.55.
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57 86.15 mm 25.00us offset 2.01 mm/us86.92 mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us86.92 mm 25.00us offset 2.01 mm/us86.15 mm 25.00us offset 2.01 mm/us 87.69 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us89.23 mm 25.00us offset 2.01 mm/us87.69 mm 25.00us offset 2.01 mm/us90.77 mm 25.00us offset 2.01 mm/us position1 position2 position3 position4 position6 position7 position8 position9 position5 position10 Section 8 Transverse Measurement (192' - 50 khz) Figure 5.56.
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58 Figure 5.61. SAFT D-scan taken at the beginning of Section 10 along the transverse direction.
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