658Acrylic Latex Color Finish

658.01 Description This work shall consist of applying a color finish to asphaltic or

Portland cement concrete surfaces designated on the plans for median strips, islands, and certain crosswalks, color-coated with an acrylic latex finish system.

658.02 Materials The color finish shall be a green acrylic latex emulsion type,

containing only inert mineral pigment colorants, fade-resistant for exterior use. The color coating shall contain insoluble mineral fillers suitable for uniform application, tack free, and shall show no deterioration due to temperature, salts, moisture, and ultraviolet rays of sun for a period of at least one year. 6-173 Only materials on the Qualified Products List of Acrylic Latex Color Finish shall be used.

658.03 Surface Preparation The bituminous or Portland cement concrete shall be

carefully laid, free of depressions and ridges and at the pitch or grade shown on the plans to provide flow of water from the surface. The pavement shall be free of all loose dirt, dust particles, grease, oil, or any other contaminant. Grease and oils shall be removed by a detergent wash, flushed with water, and followed by high-pressure water, air broom, or hand sweep. The surface course of bituminous concrete pavement shall be a tight mix of thoroughly compacted material. The pavement shall be placed a minimum of 7 days before the application of the coating. The surface of Portland cement concrete pavement shall be a medium broom finish. New concrete must cure a minimum of 30 days before application of coating. The concrete surface shall be first washed with phosphoric acid solution [8 parts water to 1 part acid], then coated with a tie-coat before the green finish coat can be applied. The surface shall be accepted by the Resident and the coating subcontractor before the application of the color coating. The Contractor shall add sand to the acrylic latex in the crosswalk area as directed by the Resident.

658.04 Application of Color Coating The coating shall be applied according to the

Manufacturer’s recommendations, which can be found in the technical bulletin of the product. The paint shall be stored in an area where freezing or overheating will not occur. The acrylic coatings are waterborne and cannot cure in cold temperatures or when subject to moisture. Care shall be taken not to apply coatings when rain is forecast or sudden drop in temperature is expected. Two coats shall be applied over the area in a thickness sufficient to give uniform texture, appearance, and color, per Manufacturer’s recommendation. The second coat shall not be applied until the first coat is completely dried to touch and the Manufacturer’s minimum time is requirement for top coating has elapsed. No color coating shall be allowed to run, drop, or otherwise color adjacent areas. If the Contractor elects to apply the coating after the above date, the Contractor is responsible for the performance of the coating. In this case, the payment will be withheld until the following spring. 6-174

658.05 Method of Measurement Acrylic Latex Color Finish will be measured by the

square yard of surface sealed, measured parallel to the surface. Furnishing and adding sand at designated locations will be incidental.

658.06 Basis of Payment The accepted quantity of Acrylic Latex Color Finish will be

paid for at the contract unit price per square yard complete in place, including furnishing, and adding sand, where required. Payment will be made under: Pay Item Pay Unit

658.20 Acrylic Latex Color Finish S q u a r e Y a r d