Table 4: Reduction of mechanical property (%).
(a) For steel

Time period (day)pHTensile strengthFracture toughness

903.03.439.29
5.52.637.51
8.01.396.35

1803.04.6611.51
5.53.8613.80
8.03.3113.51

2703.04.7714.93
5.54.5618.50
8.04.4319.77

(b) For cast iron

Time period (day)pHTensile strengthFracture toughness

903.08.456.56
5.53.242.05
8.00.841.38

1803.08.6220.36
5.54.3218.63
8.09.9833.67

2703.011.6429.05
5.59.8932.79
8.014.3133.99