CBRI says: On seeing the permeability of the concrete and the corrosion of the reinforcing steel it gives an impression that, the service life of these towers can not be more than 20 years. These towers demand lot more expendure for the repair and retrofitting beyond this period. The audit memo points out that the reinforcing steel was never covered adequately despite three reports pointing to that deficit. The reinforcing steel is more prone to corrosion when exposed to moisture, oxygen, acidic environments and chlorides, which is why it is required to be covered. In many places there was chipping of the cover concrete.
Article Source: http://timesofindia.indiatimes.com/city/delhi/Rs-2-crore-Commonwealth-Games-Village-flats-good-for-only-20-years/articleshow/7203125.cms#ixzz1ABO4tSRK
Publication Date: 2 Jan 2011