Officer in charge of Construction, Building 351, Indian Head Division, Naval Surface Warfare Center, Indian Head, Maryland 20640-5035

99 -- CONDUCTIVE FLOORING. DUE 072595. Contact: Frank Tiscione, (301) 743-4406. The Indian Head Division Naval Surface Warfare Center Indian Head MD is seeking sources for Fluid Applied Resilient (Resinous) Conductive Flooring. Responsible sources must meet following criteria: Qualifications of Installer. Installation shall be performed by an applicator approved by the manufacturer of the floor surfacing materials. Contractor shall furnish a written statement from manufacturer that installer is acceptable. Performance Qualification Test. Contractor shall submit 29 samples for testing. One sample shall be a minimum of 3' by 1' on a non-conductive backing. One sample shall be provided with manufacturer's recommended method of ground connection installed as part of the sample, including free length of #6 solid copper wire. A complete assembly of ground connection method shall be submitted separate from the flooring samples. The remaining samples shall be 1'' by 1/2'' by the thickness of the proposed floor. Name and address of the manufacturer of the material shall be listed on back of large sample. All literature and test reports shall accompany submitted samples. Contractor shall submit certified test reports performed in the last two years certify their product meets all spec requirements. Conductivity and compatibility tests will be performed by IHDIVNAVSURFWARCEN on samples submitted prior to start of work. Chemical compatibility tests will be run with the following: Acetone; Trichloroethane; Alcohol; Casting Solvent (Nitroglycerin and 2NDPA); NG Killer (Sodium Sulfide/Alcohol/Acetone); ELBA Solvent (Ethyl Lactate/Butyl Acetate); Ether; Water; and Other (any chemical that will be used in building where floor is to be installed. Chemicals shall be approved by IHDIVNAVSURFWARCEN Safety Dept.) Test Procedure. The 1'' by 1/2'' samples will be divided into groups of three for each chemical, placed in glass vials, and soaked in appropriate chemical. First group of samples will be drawn after 1 hour, second after 24 hours, and third after 48 hours to be examined for signs of incompatibility. Forty eight hour samples will be visually inspected at 2, 4, 8 hour intervals. Samples drawn for inspection will be examined for: Surface dulling; Surface attack, such as softening, warping, swelling, blistering, peeling, raised or rough area; Color change; and Bending characteristics, such as brittleness, fragmentation, or disintegration. Category Rating. Each Category except Bending above will be rated as follows: no change; slight change; moderate change; or severe change. Bending Category will be rated as unbreakable/breakable. Any additional information which describes more accurately the effects of the chemicals on the sample shall be documented in writing. Absorption Test. At the IHDIVNAVSURFWARCEN Safety Dept's option, the 1'' by 1/2'' samples will be weighed before and after the test to detect any signs of chemical absorption. Casting solvent (NF/2NDPA) samples will be weighed for NG absorption. Manufacturer's Certification. Manufacturer shall certify product meets all requirements in Products part of this specification. Gov't has option to test product to verify Contractor's results. In-Place Performance Test Approval Letter. A minimum test area of 400 square feet shall receive an in-place performance test under forklift traffic to check adhesion of floor system, conductivity of grounding system, durability, and compliance with requirements of Products part of specification prior to installation of entire flooring system. Test period will run from 6-12 months from date test floor is installed. Test location shall be selected by Safety, Operating, and Public Works Departments. Qualifications shall be based on meeting all requirements of this specification. Submit NSWC Safety Dept Approval letter that conductive flooring system has met and passed above mentioned performance test. Only products passing this test will be accepted. Products Conductive Flooring System. Work requires the provision of conductive flooring system with copper grounding system. Conductive flooring system shall be a non-sparking, electrically conductive, impervious slip-resistant, load and abrasion resistant, chemically resistant system consisting of a floor primer, a fiberglass cloth underlayment, topped with an epoxy or polyester type topping. Glass reinforcing cloth shall be a commercially available medium duty woven glass fabric weighing not less than 10 ounce per square yard. Minimum thickness of the top coat shall be 1/16 inch thick. Necessary floor preparation shall be accomplished prior to installation of flooring system as indicated in Applications Paragraph of specification. Conductive Flooring placed outside of a building shall be resistant to weather conditions without affecting the conductivity. Characteristics required of the system are as follows: Primer. Type recommended by the manufacturer to penetrate into the pores of the substrate and bond with floor surfacing matrix to form a permanent monolithic bond between substrate and surfacing matrix. Copper, Sheet and Strip. ASTM B370, cold-rolled temper. Top Coating. Black color coating of type recommended by manufacturer. Physical Properties. The complete system after curing shall have the following properties when tested in accordance with test methods listed for each property. Epoxy Matrix Floor Surfacing. (a) Spark Resistance. Conductive flooring system must not spark when stroked vigorously with a 12-inch hardened steel file in a 3-foot arc. Generally, file is held at arm's length and a 3-foot arc is scribed on floor with tip of file. Person conducting test must strike floor enough times, between 6 and 12, so as to convince him/herself floor does not spark. One spark will disqualify the floor. Test is conducted in subdued light. Person conducting test will prepare a statement indicating name, code, date, number of trials, and name of identification of floor. State briefly trials, and name or identification of floor. State briefly if floor passed or failed and severity of sparking, if any; (b) Compressive Strength: ASTM C 579; 10,000 psi minimum at 7 days; (C) Tensile Strength: ASTM C 307; 1500 psi minimum at 7 days; (d) Flexural Modulus of Elasticity: ASTM C 580; 500,000 psi minimum at 7 days; (e) Thermal Coefficient of Expansion: ASTM C 531; 0.00004 inches per inch-degree F maximum; (f) Shrinkage: ASTM C 531; 0.5 percent maximum; (g) Bond Strength: ACI 503R, 300 psi minimum with 100 percent concrete failure (2500 psi Compressive Strength Concrete); (h) Flame Spread Index: ASTM E 162; 25 maximum; (i) Smoke Deposited: ASTM E 162; 4 mg maximum; (j) Abrasion Resistance: ASTM D 4060; 15 mg maximum weight loss; (k) Impact Resistance: MIL-D-3134; no visible signs of chipping, cracking, or detachment and not more than 0.05 inch of permanent indentation; (1) Indentation: MIL-D-3134; no signs of cracking or detachment with initial indentation not to exceed two percent; (m) Resistance to Elevated Temperature: MIL-D-3134; no flow or slip exceeding 0.063 inch; no softening; (n) Hardness: As specified in ASTM D-2583, the hardness required is a minimum of 70 (Shore D Duro-meter); (o) Non-slip Properties: MIL-D-3134; factors of friction not less than shown as follows: Contacting Surface: Leather. Factor of Static Friction Condition: Dry-0.60, Wet-0.50. Factors of Sliding Friction Condition: Dry-0.30, Wet-0.40. Contacting Surface: Rubber: Factor of Static Friction Condition: Dry-0.60, Wet-0.70, Oily-0.30. Factors of Sliding Friction Condition: Dry-0.40, Wet-0.70, Oily-0.10; and (p) Moisture Absorption: MIL-D-3134; 1.0 percent maximum. Resistance to Temperature and Humidity. The conductive flooring system shall be resistant to changes in temperature and humidity. Service temperature range of flooring shall be 0 deg F to 220 deg F. Humidity changes shall not affect conductivity of flooring within the limits hereinafter specified. High humidity produces higher conductivity or lower electrical resistance and a low humidity produces higher resistance. Resistance to Solvents. Chemicals and Cleaning Agents. Conductive flooring system must be resistant to water, steam cleaning agents, solvents, and any chemical compounds (including nitroglycerin) processed in conductive floor area. Flooring must also be able to withstand kill solutions that are used to deactivate spilled explosives. Conductivity. The electrical resistance between the conductive floor and the static ground system of the building shall be 25,000 ohms minimum and 500,000 ohms maximum. Floor Condition. Floor shall be clean and dry, room shall be free of flammable gas mixtures or explosives dusts. Test Electrodes. Each electrode shall weigh 5 pounds and shall have a dry, flat, circular contact area 2-1/2 inches in diameter. Contact area shall have a surface of aluminum or tin foil that is 0.0005 to 0.001 inch thick and backed by a layer of rubber 1/4-inch thick. Surface shall measure between 40 and 60 inch durometer hardness as determined by a Shore Type A Durometer (ASTM D-2240-68). Test Instrument. Resistance shall be measured with a suitably calibrated ohmmeter. The ohmmeter shall operate on a nominal open-circuit output voltage of 500 Vdc, a short-circuit current of 5 mA, and an effective internal resistance of 100,000 ohms plus or minus 10%. Test Measurements. Both electrode-to-electrode and electrode-to-ground measurements shall be made at five or more locations in each room and the results shall be averaged. For compliance with the requirements of paragraph Resistance to Solvents, Chemicals and Clean Agents, the average shall be below limits specified, and no value shall be greater than 5 meg ohms. All readings shall be taken with the electrode or electrodes more than 3 feet from any ground connection or from a grounded object that is resting on the floor. If the resistance changes appreciably with time during a measurement, the value observed after voltage has been applied for 5 seconds shall be considered to be the measured value. Execution. Mixing. Proportion and mix the floor surfacing components in accordance with manufacturer's instruction. Application. Apply primer, floor surfacing, and seal coat in accordance with manufacturer's recommendations and the following requirements. Primer. Apply primer uniformly over entire area to receive floor surfacing using clean rubber squeegees or clean steel trowels. Do not allow primer to collect in depressions. Allow primer to dry thoroughly before next coat is applied. Reprime porous areas or areas where primer has dried. Floor Surfacing. Apply mixed surfacing material to provide a finish floor surfacing not less than 1/4 22inch thick. All surfaces shall be flush, true to plane and line, and level within 1/4 inch in 10 feet. Seal Coat. Apply seal coat uniformly covering all surfaces after floor surfacing has cured and as recommended by supplier. Protection. Surfacing shall set a minimum period of 48 hours before traffic is allowed on floor. Finished flooring shall be protected from traffic by covering with 30 pound building paper or other equally effective means until final acceptance of the project. Field Testing. In-Place Conductivity Test. Upon completion of installation (including curing), conductive flooring system will be checked for conductivity by the Gov't. In the event floor does not meet conductive requirements previously specified, floor shall be repaired/replaced to the satisfaction of the Officer in Charge of Construction at no additional cost to the Gov't. This synopsis does not constitute an IFB nor an RFP and is not construed as a commitment by the Gov't. The IHDIVNAVSURFWARCEN is not responsible for nor reimburse firms for any costs incurred in responding to this notice. (186)

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