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Orange County Health Department Improvements Smith Sinnett / 2024008 <br />Hillsborough, NC Orange County Asset Management Services <br /> <br />RESINOUS FLOORING 09 67 23 - 5 <br />2. Moisture Testing: Perform tests recommended by Manufacturer and as follows. <br />a. Perform anhydrous calcium chloride test ASTM F1869-98. Application will proceed only <br />when the vapor/moisture emission rates from the slab is less than and not higher than 20 <br />lbs/1,000 sf/24 hrs. <br />b. Perform relative humidity test using is situ probes, ASTM F2170. Proceed with application <br />only after substrates have a maximum 99% relative humidity level measurement. <br />c. If the vapor drive exceeds 99% relative humidity or 20 lbs/1,000 sf/24 hours then the <br />Architect shall be notified and advised of additional cost for the possible installation of a vapor <br />mitigation system that has been approved by the Manufacturer or other means to lower the <br />value to the acceptable limit. <br />3. Cracks greater than 1/8-inch wide are to be chiseled or chipped-out and repaired per <br />Manufacturer’s recommendations. <br />4. All control joints shall pre-filled with Manufacturer’s recommended product. <br />5. All expansion joints shall be pre-filled with sand and their location marked. Cut open after <br />completion of floor and filled with Manufacturer’s recommended joint filler. <br />6. There shall be no visible moisture present on the surface at the time of application of the <br />system. <br />7. Mechanical surface preparation <br />a. Shot blast all surfaces to receive flooring system with a mobile steel shot, dust recycling <br />machine (Blastrac or equal). All surface and embedded accumulations of paint, toppings <br />hardened concrete layers, laitance, power trowel finishes and other similar surface <br />characteristics shall be completely removed leaving a bare concrete surface having a profile <br />of CSP greater than or equal to 3.0 and less than or equal to 4.0, as described by the <br />International Concrete Repair Institute. <br />b. Floor areas inaccessible to the mobile blast machines shall be mechanically abraded to the <br />same degree of cleanliness, soundness and profile using diamond grinders, needle guns, <br />bush hammers, or other suitable equipment. <br />c. Cracks and joints (non-moving) greater than 1/8-inch wide are to be chiseled or chipped <br />out and repaired per Manufacturer’s recommendations. <br />8. At spalled or worn areas, mechanically remove loose or delaminated concrete to a sound <br />concrete and patch per Manufacturer’s recommendations. <br />9. Slab mitigation for excessive soluble ion levels: Shot blast all surfaces to receive flooring to <br />level determined by Manufacturer to have acceptable levels of soluble ions. <br /> <br />3.3 APPLICATION <br /> <br />A. General <br />1. The system shall be applied in five distinct steps as listed below: <br />a. Substrate preparation <br />d. Topping application <br />e. Resin application with decorative chip broadcast <br />f. Groutcoat application <br />g. Final topcoat application <br />2. Immediately prior to the application of any component of the system, the surface shall be dry, and <br />any remaining dust or loose particles shall be removed using a vacuum or clean, dry, oil-free <br />compressed air. <br />3. The handling, mixing and addition of components shall be performed in a safe manner to achieve <br />the desired results in accordance with the Manufacturer's recommendations. <br />4. The system shall follow the contour of the substrate unless pitching or other leveling work has <br />been specified by the Architect. <br />5. A neat finish with clean boundaries and straight edges shall be provided by the Applicator. <br />6. Provide minimum 1/4-inch termination keyways as required by Manufacturer at the following <br />locations, and as indicated on the Drawings: <br /> a. At floor drains. <br /> b. At locations where resinous flooring terminates and abuts another flooring. <br /> c. Into masonry wall mortar joints at the top of cove bases. <br />Docusign Envelope ID: 186E0FF8-664C-4A5C-9F97-28196CE69FD1