KFS Cement Concrete Sulfate-Resistant Corrosion Inhibitor Additive
CPA Concrete Corrosion Inhibitor Enhancer
Harbor port concrete corrosion inhibitor is a composite admixture.Blended in appropriate amounts with regular cement, it meets the requirements of the "Standard for Sulfate-Resistant Silicate Cement." When incorporated into concrete, it satisfies the technical requirements for shrinkage-compensating concrete as specified in JTJ275 "Technical Specification for Corrosion Prevention of Concrete Structures in Port Engineering" and GB50119 "Technical Specification for Application of Concrete Admixtures." It boasts anti-cracking properties and impermeability. This material addresses issues such as harmful cracks caused by drying and cold shrinkage in concrete, as well as sea water侵蚀, thereby enhancing the durability of concrete structures in port engineering.
Product Features
1. Low alkali content. Total alkalinity < 0.40%.
2. High Performance: The performance criteria of GB50119 standard, with a CPA content of only 8-12%, thus having minimal impact on the original concrete mix design during use.
3. The CPA cement has a normal setting time with no impact on strength. It also features slight expansion properties and a smaller shrinkage rate in the later stage. This is its distinct characteristic, i.e., it has compensating shrinkage and crack resistance properties.
4. Offers high waterproofness and resistance to sulfate erosion.
5. The CPA has a short expansion stabilization period. After 14 days in water, there is no significant expansion, which is beneficial to the later strength growth of concrete.
Technical Specifications:
1. Appearance and shape: greyish-white powder material.
2. Density: 1.5 tons/sq. m.
3. Setting Time: Initial setting time, 45 minutes; Final setting time < 10 hours.
4. Standard expansion rate test (mixed within 10-12%), in water for 7 days, 0.025%; in water for 28 days < 0.1%; in air for 21 days, -0.02%.
5. Compressive Strength: Adheres to the JC478 strength standard testing method, with a 28-day strength greater than 45 Mpa.
6. Ion Resistance (C) < 1000
7. No significant effect on concrete strength.
8. Can establish self-stress values of 0.2-0.7 MPa in reinforced concrete.
9. Concrete corrosion resistance is significantly improved, with the erosion coefficient (K) in seawater ≥ 1.0.
10. Free from rust on steel rebar and has no impact on water quality.
Application Fields
Marine Port Concrete Anti-corrosion EnhancerThe CPA plays a role in five aspects: structural self-waterproofing, ultra-long seamless construction, control of cracks in large-volume concrete, prevention of ions, resistance to sea water erosion, and resistance to sulfate erosion.
1. Offshore concrete structures or areas in direct contact with seawater, such as: docks, breakwaters, offshore oil drilling platforms, bridge piers across the sea, water conveyance channels, etc.
2. Formulated crack-resistant and waterproof concrete is suitable for basements in coastal areas and buildings requiring waterproofing and corrosion protection, such as subway stations, etc.
3. Compensating shrinkage concrete can be used for large-scale marine concrete structures and extensive projects requiring minimal expansion joints.
4. Infrastructure projects in saline-alkali regions. Such as: pile foundations, basements, highways, and their foundations.
5. Projects involving reservoirs, tanks, towers, etc., with high requirements for erosion resistance and impermeability.
Dosage: Generally, the addition amount for the binder material (or cement) is:8%; 12% effectiveness at higher sea water concentration.
Cautionary Notes:
Due to the inherent differences between various types of cement and admixtures, when changing cement types or models, it is necessary to conduct adaptability tests.
2. Under conditions of special corrosion, in addition to using anti-corrosion enhancers, other appropriate anti-corrosion measures should be taken (e.g., rust inhibitors, etc.).
Inspection Standards: Inspection Execution Standards:GB23439-2009, JC/T1011-2006 respective indicators
Packaging and Storage:25kg bags with inner plastic lining; products should be stored in a dry place to prevent moisture, with a shelf life of one year.
