| abstract |
[PROBLEMS] To prevent durability deterioration due to salt damage in mortar and concrete, and does not require any special treatment, and can be simply mixed, and with a relatively small amount of use, high chloride ion penetration resistance. Of admixtures that can be applied to mortar and concrete. The chemical component contains 40 to 50% by mass of Al 2 O 3 and 45 to 55% by mass of SiO 2 , the Fe 2 O 3 equivalent content of iron is 3.0% by mass or less, and the particle diameter An admixture for preventing salt damage comprising an amorphous aluminosilicate having a content ratio of particles of 0.1 μm or more and 7 μm or less of 50% by volume or more as an active ingredient. [Selection figure] None |