Description
Characteristics & Advantages
• Provides significant cost saving
• Integral protection for the whole concrete
• Permanent surface protection
• Time saving
• Cures internally
• Self-heal of surface crack
Features
• Maximise the compactness of cement concrete using catalytic crystallization materials to fill pores and defects, improving impermeability after pouring and waterproofing.
• Have excellent self-healing function for concrete cracks and the repair function is reactivated whenever water enters.
• Having an alkaline system to perform and improve the workability of concrete, increasing the strength of concrete by 20-30%.
• Reduce shrinkage and cracking of the concrete itself.
• Prevents the corrosion of harmful chemical aggressive media (such as chloride ions and improves the durability of concrete).
Storage
• Plastic bucket or valve pocket. When storing and transporting, different types of products should be stacked separately and should not be mixed.
• Avoid sun and rain, to prevent dampness.
• In normal transportation, storage conditions, the shelf life is 12 months.
Surface Preparation
Trial mix shall be conducted minimum 28 days before the waterproofing is ready to cast. The maximum water and cement ratio is not greater than 0.45 (free water-fine aggregate moisture + admixture). The quantity of concrete that to be treated with Obaproof WP-502.
Application
During mixing, add concrete to the mixer in the specified proportion and stir for at least 5 minutes, adjusting the blend based on the project. This material can replace concrete pumping agents and requires testing before use. Pour fresh concrete and vibrate to ensure compaction, then maintain it by adding water or covering it with a film to prevent rapid evaporation and cracking. When adding Obaproof WP-502 to the concrete ingredients, follow the mixing plant’s procedures for the joining order. For wet mixing, use 10%-20% of the total water to form a thin mortar. Add cement, gravel, and sand to the remaining water. Finally, pour the Obaproof WP-502 dilute mortar into the mixer for mixing. The mixer is agitated for a minimum of 5 minutes to ensure that the Obaproof WP-502 is evenly distributed throughout the concrete.
Dosage
Note
1.Obaproof WP-502 has certain water-reducing properties, and its concrete reinforcement effect is higher than that of ordinary water-reducing agents. It can partially or fully replace concrete pumping agents. Before using this product, a concrete mix proportion test is required to determine whether to add concrete pumping agent.
2. The Obaproof WP-502 must be mixed evenly with the cementitious material during use.
3. When the temperature is lower than 5 °C, add a certain amount of antifreeze in the fresh concrete and take appropriate insulation measures.
Technical Data
• Water content: < 1.5%
• Fineness, 0.63mm residue on sieve: < 5%
• Chlorine ion content: 0.1%
• Total alkali content: Measured value
• Water-reducing rate: < 8%
• Air content: < 3% • Different setting time: Initial setting time: > -90 min
Final setting time: 100 h
• Ratio of compressive strength: 7d, > 100%
28d, > 100%
• Ration of shrinkage: 28d, < 125% • Permeability in concrete: mixed waterproofing agent, the impermeability of concrete stress a/Pa, 28d : Measured value ratio of penetration pressure: 28d, > 200%
mixed waterproofing agent,
the impermeability of concrete stress a/Pa, 56d : Measured value
the second permeability pressure ratio: 56d, > 150%
Benchmark concrete of 28d permeability pressure should be 0.4 + 0.0 0.1MPa, and listed in the product quality inspection report.