Standard Sportcoat specification
The SPORTCOAT Acrylic Coating System is a durable long wearing and weather resistant surface system, for use on suitably prepared asphalt or concrete surfaces. The finished surface is colour fast, abrasion resistant and has a non-slip texture. Cured SPORTCOAT surfaces have “breathing” properties which allow any small amounts of moisture vapour from below to escape and thus prevent blistering and peeling. The materials dry quickly, and display excellent protection from ultraviolet sun rays. Cleaning by repeated washing or scrubbing does not affect colour or non-slip properties. The systems are designed for use on tennis and other courts for ball sports, but are increasingly used on general playground areas and in the domestic situation on footpaths, patios etc. Sportcoat is available in ten standard colours, but custom colours are available on request. The systems to be used vary from concrete to asphalt and are described briefly below. (Also see references) SURFACE PREPARATION Some items of surface preparation are common to any surface to be coated, the finished job is generally only as good as the preparation preceding it. New asphalt or concrete surfaces should cure for a minimum of 10 days before commencement of the coating operation. The surface to be coated must be totally clean, free from all loose dirt and dust. Any diesel or oil spillage must be removed. The use a high pressure water cleaner after preliminary cleaning is advisable. Any minor depressions, gouges and uneven areas should be repaired prior to commencing coating, using either SPORTCOAT Crack and Patching compound, or Asphalt Filler Coat depending on the nature of the repair. Deep depressions should be repaired in multiple coats to ensure thorough curing of the patching material. N.B. The coating system is not generally intended to be a levelling course, and if a job is correctly constructed little work of this nature should be necessary. In the case of excessive unevenness, poor levels or surface texture, refer to the contract Engineer. The manufacturer should be consulted if required for advice on re-levelling old courts for re-coating. SPORTCOAT APPLICATION ON NEW ASPHALT On a normal close knit asphalt surface, a three coat system comprising two coats of SPORTCOAT Asphalt Filler Coat and one SPORTCOAT Topcoat is suitable. However, alternatives can frequently be used to advantage, for example:
|1 filler coat||2 top coats|
|1 filler coat||1 intermediate||1 top coat|
|1 filler coat||1 intermediate||1 pave coat|
The main varying factors from the alternative approaches are differing final surface texture requirements and differing coverage rates, hence film build. Excessive surface texture in the asphalt calls for additional filler coats, – the surface prior to the final SPORTCOAT application should be a uniform “sandpaper” texture. If this has not been achieved, further coats are called for until the texture is uniform. Dilute SPORTCOAT Asphalt filler Coat with water, 4-5 parts Sportcoat : 1 part water and stir mixture thoroughly. If mixed material is allowed to stand for prolonged periods, settlement may occur and re-stirring is necessary. Pour mixed material in a winrow across the surface on one end of the area to be coated and spread with a rubber bladed squeegee, working back and forth across the court, moving approx. 300mm forward on each pass. Fresh material should be continually added to the winrow until the far end of the area is reached. To achieve good levelling (including the removal of ridges) and an even coating, a second squeegee operator should follow immediately behind the first. Each coat should be examined when dry and any nibs, ridges etc. removed by scraping and/or stoning with a Carborundum stone. SPORTCOAT Topcoat is diluted, 3 – 4 parts Sportcoat: 1 part water, and a minimum of one coat is used as a final coat, preferably applied across the width of the court. Application is by squeegee but a wide, medium bristle industrial broom can be used in place of the second squeegee to finish the work.
SPORTCOAT APPLICATION ON NEW CONCRETE
The concrete surface should have a wood float or soft broom finish. A steel float finish is NOT ACCEPTABLE. No additives should be used in the concrete, and no chemical curing used. Bonding of the Sportcoat surface could be suspect if these precautions are not strictly observed. Prior to coating, acid etching should be carried out with Hydrochloric acid, diluted approx. 1 part acid : 4 – 4 parts water. This mixture should be thoroughly washed off with fresh water after etching is complete to neutralize the surface, and preferably high pressure washed to ensure complete removal of latent dirt and unsound material. The first coat on the concrete surface must be thinned SPORTCOAT Primer. Not a great deal of material is used but the resulting film acts as a tie coat between the concrete and Sportcoat system. The remainder of the system then used on concrete can be as described previously for asphalt surfaced areas.
SPORTCOAT APPLICATION ON PREVIOUSLY COATED SURFACES
The condition of the previous coating and of the pavement structure are the main determining factors in the selection of appropriate remedial and recoating methods. It is essential that any surface is thoroughly clean prior to any coating operation, and this frequently implies the removal of any old coating that has deteriorated to the point of loss of internal cohesion. Removal is normally achieved by high pressure blasting. The cause of any surface cracking should be established and countered, and the cracks then suitably treated before re-coating. It is essential that any recoat project should be examined by a specialist in the field to ensure the optimum result is achieved in the upgrading work. Following suitable preparation Sportcoat installation should follow procedures outlined in 3 above.
Coverage Rates. shown in sq.m./ litre and based on undiluted material.
|Filler Coat||1.5 – 3.0|
|Inter Coat||2.0 – 3.5|
|Top Coat||2.7 – 4.0|
|Pave Coat||4.0 – 6.0|
Variations in coverage rates particularly with filler coat are dependent on surface texture of the surface being coated. Other factors include operator experience and prevailing weather during the coating operation. Coating should not proceed when the temperature either falls below 10 deg C. or raises above 35 deg C. or when rain threatens. Linemarking should be in SPORTCOAT Linemarking paint which is available in five standard colours, which can be applied by brush, roller or spray. Individual specifications are available for differing substrate conditions.