Salt-Resistant Marine Concrete Composition

Salt-Resistant Marine Concrete Composition Containing Salt Adsorbents and Lithium Carbonate

This technology is a salt-resistant marine concrete composition that combines Portland cement, blast furnace slag, fly ash, and fine/coarse aggregates with an admixture containing a plasticizer, salt adsorbent, lithium carbonate, and corrosion inhibitor.

Concrete in marine environments is prone to steel reinforcement corrosion due to penetrating chloride ions, making it difficult to maintain long-term strength and water tightness while resisting salt damage.

This technology enhances the salt resistance and long-term durability of marine concrete structures by using a salt adsorbent to substitute and bind chloride ions, while lithium carbonate and corrosion inhibitors suppress corrosion.

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Key Features:

• Portland cement that hardens when mixed with water and contains calcium oxide, silicon dioxide, and aluminum oxide to provide strength.
• Blast furnace slag, which forms Friedel's salt to fix chloride ions upon hardening, and fly ash, which increases strength through pozzolanic reactions.
• An admixture that disperses particles in the mixture of Portland cement, blast furnace slag, and fly ash to provide fluidity.
• The admixture consists of a plasticizer, a salt adsorbent that substitutes chloride ions, lithium carbonate to enhance salt resistance, and a corrosion inhibitor.

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This invention was developed with support from the Ministry of Education for the development of concrete mixed with admixtures to improve the salt-damage durability of reinforced concrete buildings in coastal areas.

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