液面以上砂浆的膨胀开裂主要是因为盐溶液在迁移过程中由于蒸发作用造成成型

The expansion cracking of the mortar above the liquid level is mainly caused by the high concentration of the salt solution on the lower surface of the molding surface due to the evaporation of the salt solution during the migration process, which reacts with the cement hydration products to generate a large amount of expansion corrosion products, resulting in the mortar. The area above the liquid surface of the test piece corrodes faster and more seriously than the area below the liquid surface.

The expansion cracking of mortar above the liquid level is mainly caused by the high concentration of salt solution on the lower surface of the forming surface due to evaporation during the migration of salt solution, which reacts with cement hydration products to produce a large number of expansive corrosion products, resulting in faster and more serious corrosion damage in the area above the liquid level than that below the liquid level.

The expansion cracking of mortar above the liquid level is mainly caused by the high concentration of salt solution on the lower surface of molding surface due to evaporation in the process of migration, which reacts with cement hydration products to generate a large number of expansive corrosion products, thus leading to the corrosion damage of the area above the liquid level of mortar specimen faster and more serious than that below the liquid level.