IJCRR

IJCRR - 8(12), June, 2016

Pages: 14-20

EFFECT OF CORROSION ON THE MECHANICAL PROPERTIES OF STEEL REINFORCEMENT

Author: Ponjayanthi D., Vinodh K.R.

Category: Technology

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Abstract:

Reinforced concrete structures in coastal areas under goes severe damage due to corrosion of reinforcement during its design life. The gradual degradation of the structural integrity due to corrosion results in considerable financial burden. Such structure when subjected to seismic action undergoes severe damage. Under the action of seismic loads, the reinforcement bars are subjected to tension and compression. Hence in present study, the effect of corrosion on the mechanical properties of reinforcement is studied. In compression test there is no significant reduction in average ultimate stress and average ultimate load for corrosion level of 5% for specimens with L/D ratio of 10 and 15. The reduction in average ultimate load is not proportional to the level of corrosion. It is also observed that the percentage decrease in average ultimate load is higher than the level of corrosion. It could be noted that the average ultimate stress decreases slightly lesser than the level of corrosion. The effect of L/D ratio affects both average ultimate load and ultimate stress significantly. In cyclic test the maximum load decreases slightly lesser than the level of corrosion. It is also observed that the percentage decrease in maximum stress in cyclic test is lesser than the level of corrosion in tension and it is higher than the level of corrosion in compression. A huge reduction in both mean load and mean stress beyond 0.5% of strain in compression is observed in cyclic test.

Keywords: Reinforced concrete, Corrosion, Severe damage, Ultimate load, Ultimate stress

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