Abstract
This paper treats salt-tight efficiency about test pieces of various concrete and finisfings, as amplification of another report "Research on Wearing of a Reinforced Concrete Building standing by the Seaside". It consists of next three experiments. A. Salt spray test of 500 hours. B. Natural disclosure experiment at three seaside of Shirahama, Miyazu and Kobe. C. Fundamental experiment of permeation and capillarity. The main results obtained are as follows. 1. Capillarity height of simple tube is almost linear with density of concrete. 2. Capillarity height of two faced plaines is maximum when depth of their filler is 50-100μ. 3. Polymer mixed concrete is most excellent in the test of cappillarity height, rate of suction, and salt-tight efficiency.
