Annual Journal of Civil Engineering in the Ocean Vol.37
DEPOSITION CONDITION OF MAGNESIUM HYDROXIDE LAYER ON THE SURFACE OF CEMENT TREATED CLAY IN TIDAL RIVER AREA
2021 Volume 77 Issue 2 Pages I_517-I_522
Details
2021 Volume 77 Issue 2 Pages I_517-I_522
A white layer containing magnesium hydroxide (Mg(OH)2) as the main component deposit on the surface of cement treated soil under seawater. This Mg(OH)2 layer has the function of suppressing the progress of deterioration. In this study, an immersion test of cement treated clay was carried out using the solutions with different magnesium concentrations, simulating tidal river areas. The results showed that the Mg(OH)2 layer was deposited when the pH at surface of cement treated clay specimen was maintained above 10 for a certain period of time under relatively low concentration of Mg solution. Furthermore, when the Mg(OH)2 layer was deposited on the cement treated clay, leaching of Ca ion and infiltration of Mg ion were greatly suppressed, and the deteriorated region was also reduced.
