I. Product Introduction
The road and bridge specialized modified asphalt bridge deck waterproofing coating is a water-based waterproofing paint made by modifying rubber and resin materials with high-quality bitumen as the base material. This coating is primarily composed of high polymer emulsion as the film-forming substance, combined with various functional additives.
Section II: Application Scope
Used for bridge deck waterproofing, it prevents reinforcement corrosion caused by concrete deck 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 crack under dynamic loads at low temperatures of -20℃ to -30℃.
The material solidifies into film blocks with good film toughness. The addition of chemical additives allows the material to form a film quickly, thereby shortening the construction time for bridge waterproofing.
Strong adhesion; enhanced by the addition of penetrants and thickening agents in the formula, improving the coating's penetration and bonding capabilities, allowing the paving layer to be bonded 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.
IV. Construction Method
Subgrade Treatment: New concrete has reached the designed 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.
Spraying Application: Ensure all equipment is complete and in good working condition. Use imported spray guns for three coats. Before applying the paint over a large area, first brush 2-3 coats on the treated base with a small brush. Then, apply one coat over the large area, typically 3-6 hours (but not exceeding 24 hours) depending on the temperature. Once the paint is dry, apply the second and third coats until the desired thickness is achieved.
Product Protection: No pedestrian or vehicle traffic allowed until fully cured.
Section 5: Precautions
Maintenance: Natural maintenance for 24 hours, avoid pedestrian and vehicle traffic.
Construction Temperature: Ideal between 5°C and 35°C. If the temperature exceeds 35°C in summer, sprinkle some cold water to cool it down; once dried, construction can proceed.
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.
