2018 Volume 72 Issue 1 Pages 189-196
The effect of ion species in artificial seawater on moisture penetration of mortar was investigated by water absorption test with different solution types. As a result of examining the test conditions, suppression of moisture penetration by artificial seawater was confirmed in both concrete and mortar. In the water absorption test in which the initial saturation degree was changed, the mass increase amount became smaller as compared with the dry state, but it did not affect the suppression of the water permeation. As a result of the water absorption test, in the concentration of the solution used in this study, the changes in the surface tension and viscosity coefficient in the bulk due to dissolution of the inorganic salt did not affect moisture penetration, and in the micro order channel, the difference in moisture penetration time depending on the solution type was not confirmed. In addition, it was confirmed that in the solution containing Mg2＋, the moisture penetration in the mortar was suppressed as compared with the distilled water, and the filling of voids by Mg（OH）2 is conceivable as a cause thereof. In addition, it was suggested that the hydration ions may be influenced by suppression of moisture penetration by water absorption test using lava plate.
