Study on Mechanical Behavior of Reinforced Concrete Beams under Sulfate Attack

Table 4

Cracking load and flexural capacity corresponding to different corrosion days.

Corrosion days (d)	Cracking load (kN)	Flexural capacity (kN)
0	24.55	178
60	24.59	179.21
120	24.59	179.21
240	24.53	175.92
360	24.35	171.83
480	24.03	164.84
600	23.35	154.03

Note: the cracking load corresponding to corrosion 0 d in the table is 24.55 kN, which is close to the 24 kN obtained from the test; the cracking load corresponding to 60 days of corrosion is 24.59 kN, which is somewhat different from the 32 kN obtained from the test. It may be due to human factors, and there is an error in the observation of the first crack.