Originally Posted by Lalvaz
Thank you for the cost breakup. However, is this cost of 1 km for 9 crs, valid for tarred roads or concrete roads?
This is for Bituminous surface. Concrete roads a much more expensive. Premix concrete used is around Rs 5K/cu.m including labour delivered at site. Now for a four lane carriageway with shoulders the calculation is
CW = 7.25+7.25, Sh=3m, Th = 1m (total, in 3 layers), so volume = 17.5 cum/m or 17.5k cum/km = 8.77 Cr/km for the concrete only. Add to that cost of preparation, base course and earthwork, Culverts and Bridges and final cost would go beyond 15 crores. The upside is that there will be very little maintenance cost for nearly 40 years.
One problem of concrete carriageway is that it has to cure for at least 28 days, where as the normal pavement is ready for use within hours of the final layer being laid. That means that separate lanes for existing traffic have to be laid (added cost) for the whole length.