What additives increase concrete’s resistance to saltwater corrosion?
Concrete exposed to saltwater is prone to corrosion, which can compromise structural integrity. To combat this, specific additives are used to enhance durability. Key additives include:
1. Silica Fume: This fine powder fills pores, reducing permeability and blocking saltwater penetration.
2. Fly Ash: A byproduct of coal combustion, it improves workability and reduces chloride ion infiltration.
3. Ground Granulated Blast Furnace Slag (GGBFS): Enhances long-term strength and resistance to chemical attacks.
4. Corrosion Inhibitors: Chemicals like calcium nitrite delay steel reinforcement corrosion.
5. Polymer Modifiers: Improve adhesion and reduce water absorption.
Using these additives ensures concrete remains robust in marine environments, extending its lifespan and performance.
