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. 2016 Apr 19;9(4):295. doi: 10.3390/ma9040295

Table 4.

Properties of 28-day-old hardened concrete.

Code RM BM42 B10 BM19 BM26 BM34 BM35 BM36 BM50
Compressive strength (N/mm2) 39.36 25.53 31.95 22.24 20.53 24.02 34.2 41.72 42.67
Flexural strength (N/mm2) 5.71 4.34 5.31 5.68 4.72 5.07 5.32 5.79 5.88
Density of hardened concrete (kg/m3) 2479 2165 2250 2042 2005 2069 2147 2193 2125
Ultrasonic speed velocity (km/s) 5.03 3.89 4.14 3.52 3.46 3.77 4.79 5.12 5.43