Research on Salt Corrosion Resistance Design of Highway Concrete Structures

In response to the problem of salt corrosion on highway concrete structures in high-altitude areas, this article studies the effects of water cement ratio, admixtures, and admixtures on the salt corrosion resistance of concrete through salt freezing cycle tests and salt freezing erosion resistance tests. The results indicate that under the conditions of meeting the workability of concrete, when the water cement ratio is below 0.4, the resistance to salt freezing and erosion is excellent. When the air content of concrete is between 0 and 3.8%, the salt freezing resistance and corrosion resistance of concrete increase with the increase of air content. When the air content exceeds 3.8%, the impact of the increase of air content on its performance decreases. It is advisable to use silica fume as the active mineral admixture for concrete in the admixture. If fly ash or mineral powder is used as the mineral admixture, the curing period must be extended.