I. Product Introduction
Dowbridge Special Modified Asphalt Bridge Deck Waterproofing Coating is a water-based waterproofing coating made by modifying rubber and resin materials in asphalt binder, which is a high polymer emulsion-based coating, combined with various functional additives.
Scope of Use
Used for bridge waterproofing, it prevents steel corrosion caused by concrete bridge leakage, thereby extending the service life of the beam structure.
Section 3: Product Features
Wide temperature adaptability. Does not flow at high temperatures of 140℃ to 180℃ during asphalt concrete construction and does not脆裂 under dynamic loads at low temperatures of -20℃ to -30℃.
The material solidifies into film blocks with good film flexibility. The addition of chemical additives allows the material to form a film quickly, thereby shortening the construction time for bridge waterproofing.
Strong adhesion; added penetrant and thickener in the formula enhance the paint's penetration and bonding properties, allowing the paving layer to bond with the bridge deck as a single unit.
After the construction of the waterproofing layer, the shear strength between the bridge deck and the paving layer reaches 0.5~1.0 Mpa, the base layer cracks at 2mm, but the coating membrane remains intact.
Construction operability: Cold work operations, mechanized, high degree of automation, materials are non-toxic, do not pollute the environment.
4. Construction Method
Subgrade Treatment: New concrete has reached the design strength, surface temperature cracks and natural shrinkage cracks are basically completed. The subgrade surface must be free of loose dust, dirt, grease, and standing water, achieving a clean and dry condition.
Spray Application: Ensure all equipment is fully equipped and in good working condition. Use an imported spray gun for three coats. Before applying paint over a large area, first brush 2-3 coats on the pre-treated base with a small brush. Then, apply one coat of paint over the large area, typically within 3-6 hours (but not exceeding 24 hours), depending on the temperature. Once the paint is dry to the touch, apply the second and third coats until the desired thickness is achieved.
Product Protection: No pedestrian or vehicle traffic allowed until fully cured.
V. Cautionary Notes
Maintenance: Natural maintenance for 24 hours, avoid pedestrian and vehicle traffic.
Construction Temperature: Ideal between 5℃-35℃. If the temperature exceeds 35℃ during summer, sprinkle some cold water for cooling, and proceed with construction once it dries.
Theoretical Consumption: When the dry film thickness is 1mm, the consumption is 1.9 kg per square meter. The coating thickness is generally around 0.5mm to 0.7mm, with a consumption of 1.6 kg per square meter.
