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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />RESINOUS MATRIX TERRAZZO FLOORING <br /> 09 66 23 - 7 <br /> <br /> <br />E. Moisture-Vapor-Emission-Control Membrane: Install according to manufacturer's <br />written instructions. <br />1. Install concrete substrates that fail preinstallation moisture testing. <br />F. Substrate-Crack-Suppression Membrane: Install to isolate and suppress substrate <br />cracks according to manufacturer's written instructions. <br />1. Prepare and prefill substrate cracks with membrane material. <br />2. Install membrane at substrate cracks in areas to receive terrazzo. <br />G. Protect other work from water and dust generated by grinding operations. Control <br />water and dust to comply with environmental protection regulations. <br />1. Erect and maintain temporary enclosures and other suitable methods to limit <br />water damage and dust migration and to ensure adequate ambient <br />temperatures and ventilation conditions during installation. <br />3.3 EPOXY-RESIN TERRAZZO INSTALLATION <br />A. Comply with NTMA's written recommendations for terrazzo and accessory <br />installation. <br />B. Strip Materials: <br />1. Divider and Control-Joint Strips: <br />a. Locate divider strips in locations indicated. <br />b. Install control-joint strips back to back and directly above concrete-slab <br />control joints and in locations indicated. <br />c. Install control-joint strips with 1/4-inch gap between strips, and install <br />sealant in gap. <br />d. Install strips in adhesive setting bed without voids below strips, or <br />mechanically anchor strips as required to attach strips to substrate, as <br />recommended by strip manufacturer. <br />2. Accessory Strips: Install as required to provide a complete installation. <br />C. Apply primer to terrazzo substrates according to manufacturer's written <br />instructions. <br />D. Place, rough grind, grout, cure grout, fine grind, and finish terrazzo according to <br />manufacturer's written instructions. <br />1. Installed Thickness: 3/8 inch nominal. <br />2. Terrazzo Finishing: Ensure that matrix components and fluids from grinding <br />operations do not stain terrazzo by reacting with divider and control -joint <br />strips. <br />a. Rough Grinding: Grind with 24-grit or finer stones or with comparable <br />diamond abrasives. Follow initial grind with 60/80-grit stones or with <br />comparable diamond abrasives.