Effect of Corrosion on the Flexural behaviour of one-way Slabs under Two-Point Loading

The effect of corrosion on five concrete slabs was studied for a period of 25 days, where the rate of corrosion and loss was determined by the cross-sectional area of each model for a period of five days until the last model reached 25 days in the corrosion basin. Three models were selected to be reference models with weak, medium and strong corrosion rates, and its flexural behaviour was studied while applying two-point loads. The deflection was also measured in each model. The stiffness and toughness index were also determined for the purpose of knowing the behaviour of these corroded slabs under high loads and which of them will fail first. The results showed that the corrosion rate was (11, 26, and 40) % for each level of corrosion, respectively. From the results of the applied load, the highest resistance to failure was in the slab with a low level of corrosion, and the lowest resistance was in the slab with a high level of corrosion. Also, the loss in weight and cross-sectional area for each period of corrosion increased at a non-linear rate due to the weakness occurring in the reinforcement steel.