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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />RESINOUS FLOORING <br /> 09 67 23 - 4 <br /> <br /> <br />B. Concrete Substrates: Provide sound concrete surfaces free of laitance, glaze, <br />efflorescence, curing compounds, form-release agents, dust, dirt, grease, oil, and <br />other contaminants incompatible with resinous flooring. <br />1. Roughen concrete substrates as follows: <br />a. Shot-blast surfaces with an apparatus that abrades the concrete <br />surface, contains the dispensed shot within the apparatus, and <br />recirculates the shot by vacuum pickup. <br />b. Comply with ASTM C 811 requirements unless manufacturer's written <br />instructions are more stringent. <br />2. Repair damaged and deteriorated concrete according to resinous flooring <br />manufacturer's written instructions. <br />3. Verify that concrete substrates are dry and moisture-vapor emissions are <br />within acceptable levels according to manufacturer's written instructions. <br />a. Anhydrous Calcium Chloride Test: ASTM F 1869. Proceed with <br />application of resinous flooring only after substrates have maximum <br />moisture-vapor-emission rate of 3 lb of water/1000 sq. ft. of slab area <br />in 24 hours. <br />b. Plastic Sheet Test: ASTM D 4263. Proceed with application only after <br />testing indicates absence of moisture in substrates. <br />c. Relative Humidity Test: Use in situ probes, ASTM F 2170. Proceed with <br />installation only after substrates have a maximum 75 percent relative <br />humidity level measurement. <br />4. Alkalinity and Adhesion Testing: Verify that concrete substrates have pH <br />within acceptable range. Perform tests recommended by manufacturer. <br />Proceed with application only after substrates pass testing. <br />C. Patching and Filling: Use patching and fill material to fill holes and depressions in <br />substrates according to manufacturer's written instructions. <br />1. Control Joint Treatment: Treat control joints and other nonmoving substrate <br />cracks to prevent cracks from reflecting through resinous flooring according to <br />manufacturer's written instructions. <br />D. Resinous Materials: Mix components and prepare materials according to resinous <br />flooring manufacturer's written instructions. <br />3.2 APPLICATION <br />A. Apply components of resinous flooring system according to manufacturer's written <br />instructions to produce a uniform, monolithic wearing surface of thickness <br />indicated. <br />1. Coordinate application of components to provide optimum adhesion of <br />resinous flooring system to substrate, and optimum intercoat adhesion. <br />2. Cure resinous flooring components according to manufacturer's written <br />instructions. Prevent contamination during application and curing processes.