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Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
Pintura Asfáltica
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Pintura Asfáltica

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  • 1. Coatings Single Component Products  TT-P-1952E - Waterborne traffic paint  A-A-2886A - Solvent traffic paint  Relatively simple application Plural Component Products  Epoxy Paint  Methyl-Methacrylate paint  More complicated application  More durable than conventional paints
  • 2. Coatings TT-P-1952E (waterborne) is themost commonly used coating in the U.S. industry.
  • 3. Coatings Properties of TT-P-1952EWaterborne paint was developed in response to the risingdemand for more environmentally friendly pavement markingproducts.  Low VOC (volatile organic compound).  Durable when applied properly.  Simple to clean up with water.  Excellent glass bead retention.  Highly visible colors.  Type I – dries in 10-15 minutes under 85% humidity.  Type II – fast dry (less than 5 minutes).  Type III – is a high-build acrylic.  Non-hazardous and non-flammable.
  • 4. Coatings General Precautions Waterborne paint cannot be used in galvanized, brass, aluminum, or steel equipment; stainless steel only. Paint must be prevented from freezing and should be stored between 50-90 F. Paint should not be thinned. Clean equipment after each use.
  • 5. Coatings Application Conditions Application temperatures: - Air temperature should be 45-50 F and rising. - Surface temperature should be greater than 55 F, and 5 higher than the dew point. - Relative humidity should be less than 85% (or expect longer dry times. - Heating or painting above 110 F is not recommended. Surface must be visually dry. Do not paint in windy conditions, unless windscreens are used. Material coverage varies due to equipment speed, surface porosity, and material viscosity.
  • 6. Coatings Common Problems Discoloration (iron staining) from iron present in soil and/or pavement aggregate. Bleed through of asphalt into white paint makes the paint appear brown. A primer coat (200-250 SF/gal) seals the oils from the coating. Flaking and peeling of new coating due to insufficient surface preparation. Paint bonds better to the asphalt than the asphalt does to itself, causing premature pavement deterioration.
  • 7. Coatings Curing of CoatingsMarkings are cured when all the chemical reactions stop.That means all the water and solvents have evaporated. TheNo-track condition usually comes sooner. Paint temperature – the higher the temp, the faster the cure. Pavement temperature – the higher the temp, the faster the paint will cure. Humidity – the higher it is, the slower the cure. Wind speed – the higher the wind speed, the faster the paint will cure. Paint thickness – the thicker the paint, the slower the cure.
  • 8. Coatings Intercoat Adhesion Intercoat Adhesion of waterborne traffic paints can be a problem if the application parameters and dry time recommendations are not followed.• For Fast Dry Waterborne paints, the minimum application temperature is 50°F and rising.• For Low Temperature Application Waterborne paints, the minimum application temperature is 35°F and rising.• For both paints, the temperature must be at least 5°F above the dew point and be maintained during the dry through.• First coat must be completely cured (24 hours) before application of a second coat or new layer.
  • 9. Coatings Terminology of Marking Materials Solvents transport solid portions of the mixture (pigments, resins, fillers) during manufacture and application. Pigments are used to provide color, UV stability, wear resistance, and hiding. They are the most expensive ingredient in the paint. Fillers (or extenders) are relatively inexpensive, and are used to give paint its bulk and increase durability. Additives are used to prevent ingredients from settling and skinning in the container, as well as aid drying, disperse pigments, prevent freezing, adhesion, etc. Shelf Life is the usable period when the integrity of the paint is stable.
  • 10. Coatings Compatibility of Coatings New coating must be compatible with existing coating.

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