Water proofing cement

It is ordinary cement mixed with small percentage of some metal (AI and Ca ) stearate , at the time of grinding . Concrete made with such a cement is more resistant to water penetration and is used for the construction of water retaining structures like tanks , reservoirs , swimming pools , dams , bridge piers , retaining walls etc. This concrete is also more resistant to the corrosive action of acids and alkalies which are mostly found in the industrial waters .