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WATERPROOFING BRIDGE STRUCTURES
Modern bridge - a complex engineering design, which requires a maximum impact in the work of many professionals. This is no accident, how qualitatively repair or construction is done, depends not only on the level of costs of its contents, but also safety.
Along with this, strength and durability of the bridges depends on the quality of the construction materials used. An important role in the protection of bridge structures belongs to waterproofing coating. And this is true for all the constructions: widely used both concrete and metal.
Choice of quality modern waterproofing prolongs the life of constructions and extends the service “life” of the bridge maintained surface.
Hyperdesmo ® system - is a complex of waterproofing and protection, based on the liquid elastomeric hydrophobic polyurethane resin with excellent mechanical and chemical characteristics:
• Perfectly resists thermal impact, hot asphalt can be laid on the waterproofing coating.
• Resistance to low temperatures: the coating remains flexible down to -50 ° C.
• Excellent mechanical charecteristics, high elasticity and resistance to tear.
• The material hardens without shrinkage.
• Good chemical resistance.
• After the polymerization, the material is non-toxic.
• Durable waterproofing at least 25 years.
After polymerization on the surface, forms a seamless membrane of high strength with excellent adhesion to the substrate.
Drawing is made with airless high-pressure spray, and hand tools (trowel, brush, roller).
THE SYSTEM CONSISTS OF:
The primer ensures maximum adhesion between the base and the membrane. It also successfully seals the surface porosity of the concrete. There are various primers and the choice mainly depends on the environmental conditions and the quality of the substrate.
2. Main HYPERDESMO® waterproofing membrane
HYPERDESMO® mastic is applied in three equal successive layers at a rate of 0.8 ... 0.9 kg/m2 per layer, ie with a total flow rate of 2.4-2.6 kg/m2. This material provides the fuel membrane thickness of about 2mm. For control, the layers must be of different colors.
3. Creating anti-sliding cover
Designed to provide waterproofing membrane adhesion to the road surface (asphalt).
After the last HYPERDESMO ® layer, MICROSEALER-PU® is applied at a rate of 100 g/m2. While primer is still sticky, quartz sand is on the surface is sprinkled. The sand must be of good quality, dry fraction of about 1.0 mm. The flow rate of 1.0-1.5 kg/m2, covering - an average of 40-60%. After MICROSEALER-PU ®polymerization, you must remove the excess sand and apply a second layer of MICROSEALER-PU ® at a rate of up to 150 g/m2.
The obtained membrane provides an excellent foundation for engagement with asphalt. Asphalt primer can be used as well.