2018 Volume 72 Issue 1 Pages 151-157
Physical properties and salt resistance of the concrete with chloride ion immobilization material and expansive additive added were verified. As a result, there is almost no influence on the compressive strength by using the chloride ion immobilized material and the expansive additive in combination, but there is a tendency that the expansion strain becomes smaller than in the case of adding the expansion material alone even with the same dosage. Further, in the immersion test and the electrophoresis test in the non-steady state, addition of a chloride ion immobilized material suppresses chloride ion permeation. And when used in combination with an expansive additive, the expansion strain was introduced and it was confirmed that there was no effect on salt resistance if the expansion strain is within the proper range. On the other hand, it was confirmed that in the concrete using the chloride ion immobilized material, the chloride ion penetration behaviors differed between the salt water immersion tests. And in the unsteady electrophoresis test, the chloride ion penetration of concrete increased under the energized environment. It was inferred that the movement behavior of ions under the energized environment was different due to the difference in the mechanism of immobilization of chloride ion since no significant difference was found between blending using blast furnace slag and void structure.
