PSI - Issue 52

Govardhan Polepally et al. / Procedia Structural Integrity 52 (2024) 487–505 Govardhan Polepally/ Structural Integrity Procedia 00 (2019) 000 – 000

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Table 6. Bridge-2 NDT test results. Location Average Strength RH (MPa)

Average

UPV

Average Half Cell value (mV)

Profometer Results (Cover in mm)

(m/s)

44

3933

-159

32.6 to 46.8

Pier wall (P1)

49

4011

-182

48

4139

-178

33.4 to 48.0

Pier wall (P2)

47

4328

-210

50

4376

-170

35.5 to 49.90

Pier wall (P3)

52

4262

-231

Pier wall (P4)

47

3964

-150

33.0 to 48.6

50

4001

-182

Pier wall (P5)

49

4075

-192

35.2 to 51.5

47

4187

-231

The NDT test results for Bridge 2 are shown in Table 6. The concrete's quality ranges according to the RH test that were performed on it in the majority of the areas where the RCC structure was evaluated with average strength of 48.30 MPa. The UPV findings show that the concrete, on average, falls within the excellent quality grading range at the highest tested position of the RCC construction. The Half Cell Potential test findings indicate that there is, on average, a 90% likelihood of no corrosion or ambiguity regarding the potential of corrosion at the maximum tested position of the RCC structure. The concrete core test results show that the RCC Pier wall of Bridge constructions has an average compressive strength of 41.72 MPa.

Table 7. Bridge-3 NDT test results.

Location

Average Strength RH (MPa)

Average UPV (m/s)

Average Half Cell value (mV)

Profometer Results (Cover in mm)

40.5 to 52.6

Abutment wall (A1)

44

4054

-228

Pier wall (P1) Pier wall (P2) Pier wall (P3) Pier wall (P4) Pier wall (P5)

43 45 46 44 44

4081 4173 4084 4195 4289

-199 -218 -224 -232 -297

31.5 to 49.5 32.5 to 48.2 32.2 to 45.9 33.6 to 50.5 33.5 to 48.5 46.5 to 56.3

Abutment wall (A2)

42

4314

-186

Table 7 details the results of the NDT test for Bridge 3. The concrete quality at the most evaluated areas of the RCC Structure is rated as good to very good based on the findings of the Rebound Hammer test results as 44 MPa. According to the UPV findings, the RCC Structure's maximum tested location's concrete quality is generally rated as good. At the most tested site of the RCC Structure, Half Cell Potential testing shows a 90% chance of no corrosion or Uncertain. The Concrete Core Test findings show that the RCC Pier wall of the Bridge construction has an average compressive strength of 37.56 MPa.