If the membrane-free powdered corrosion inhibitor and waterproof admixture is added when making concert, it will improve waterproofness of concrete by three times and, at the same time, increase the rate of rust resistance of iron reinforcing rods by more than 95 %; therefore, without additional membrane-type waterproofing works, the waterproofness preventing the penetration of water and moisture and the rust resistance protecting iron rods from being corroded due to chemically deteriorating substances can be sustained for the same duration of the concrete, from which the longevity and...