Leopardo Proposed Technical Center Outline Specifications Page 8 of 25 12/13/2012
f) Provide frost blocks at all exterior doors. g) All concrete footing / foundation shall be completed in accordance with the latest applicable standards for the American Concrete Institute (ACI).
4.2. Standard Interior Flatwork a) General:
i. Remove organic and other deleterious material from sub-grade under all slab areas. ii. Provide perimeter grade insulation consisting of 2” thick x 24” wide rigid board insulation laid flat below all floor slabs at all exterior walls. iii. Provide a minimum of 4” compacted granular material under all concrete slabs on grade consisting of a material similar to 2NS sand. iv. Slab shall have a minimum compressive strength of 4,000 PSI at 28 days and shall be steel trowel finished and properly cured. v. Slab shall be designed to incorporate control joints and expansion joints as required by ACI standards. vi. Provide cure-seal-hardener for new concrete floors in office areas. Burnish slab after application of cure-seal-hardener with propane burnishing equipment or as recommended by manufacturer. vii. Utility exposed concrete areas i.e. electrical room, mezzanine, mechanical rooms shall receive one coat of clear sealer (cure & seal). b) Slab Preparation for Epoxy Floor (moisture testing): i. Coordinate slab preparation for epoxy floor in technical areas as identified in the Technical Criteria Matrix. ii. Perform anhydrous calcium chloride test ASTM F 1869-98. Application will proceed only when the vapor/moisture emission rates from the slab is less than and not higher than 20 lbs/1,000 sf/24 hrs. iii. Perform relative humidity test using is situ probes, ASTM F 2170. Proceed with installation only after substrates have a maximum 99% relative humidity level measurement. iv. Vapor drive must not exceed 99% relative humidity or 20 lbs/1,000 sf/24 hrs. c) Slab Preparation for Epoxy Floor (mechanical surface preparation): i. Shot blast all surfaces to receive flooring system with a mobile steel shot, dust recycling machine (Blastrac or equal). All surface and embedded accumulations of paint, toppings hardened concrete layers, laitance, power trowel finishes and other similar surface characteristics shall be completely removed leaving a bare concrete surface having a minimum profile of CSP 4-5 as described by the International Concrete Repair Institute. ii. Floor areas inaccessible to the mobile blast machines shall be mechanically abraded to the same degree of cleanliness, soundness and profile using diamond grinders, needle guns, bush hammers, or other suitable equipment. iii. Where the perimeter of the substrate to be coated is not adjacent to a wall or curb, a minimum 1/4 inch key cut shall be made to properly seat the system, providing a smooth transition between areas. The detail cut shall also apply to drain perimeters and expansion joint edges. iv. Cracks and joints (non-moving) greater than 1/8 inch wide are to be chiseled or chipped-out and repaired per manufacturer’s recommendations. d) Office Area Slab: i. Office area floor slab shall be 4” thick concrete, reinforced with 6 x 6 W1.4 x W1.4 welded wire mesh held up with stirrups to ensure mesh is not at bottom of slab pour and placed on a compacted, engineered fill over a 6 mil polyethylene plastic sheeting vapor barrier.
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