Issue 78

M. Adel et.al, Frattura ed Integrità Strutturale, 78 (2026) 168-185; DOI: 10.3221/IGF-ESIS.78.10

BS EN 12390-6:2009 [17]. Each setup was repeated three times, and the mean results, standard deviation (SD), and coefficient of variation % (COV) are detailed in Tab. 5.

a) Slump test for NC

b) Slump test for FRC

Figure 3: Slump Test for fresh concrete. For the structural evaluation of the beam specimens, a mechanical testing device with a maximum load capacity of 1000 kN and a calibration accuracy of 0.4% was utilized. The load measurements were taken using a transducer capable of measuring up to 100 kN. The outcomes of all flexural tests, including load vs. midspan deflection and load vs. crack mouth opening displacement (CMOD) characteristics, were documented using a computer-based data logging system. Crack mouth opening measurements (LVDT2) were captured for cracked specimens, while midspan deflection (LVDT1) was monitored for both cracked and uncracked configurations, with an accuracy of 0.001 mm. The configuration of the mechanical testing apparatus is illustrated in Figs. 6 and 7. All flexural tests were terminated at a common midspan deflection of 13 mm, which corresponds to the stroke limit of the LVDT (LVDT1) used to monitor midspan deflection.

Compressive strength (MPa) Tensile strength (MPa) Value Mean SD COV% Value Mean SD COV%

Mix Type

Specimen No

1 2 3 1 2 3

52.87 50.55 51.23 56.57 54.67 53.43

4.92 4.45 4.73

Normal concrete

51.55 1.19

2.31

4.7

0.24

5.03

5

4.9

Fiber-reinforced concrete

54.89 1.58

2.88

5.1

0.26

5.19

5.4 Table 5: Average compressive and tensile strength results, with standard deviation (SD)and coefficient of variation (COV) computed from the three specimens tested per mix.

Figure 4: Compression test.

Figure 5: Indirect tensile test.

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