Specification_Section_09_67_23.16.pdf

100609

SECTION 09 67 23.16

FUEL RESISTIVE RESINOUS FLOORING, 3-COAT SYSTEM

08/10

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C307 (2003; R 2012) Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic Surfacings

ASTM C531 (2000; R 2012) Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, and Monolithic Surfacings, and Polymer Concretes

ASTM C579 (2001; R 2012) Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes

ASTM C679 (2003; E 2009; R 2009) Tack-Free Time of Elastomeric Sealants

ASTM C884/C884M (1998; R 2010) Thermal Compatibility between Concrete and Epoxy-Resin Overlay

ASTM D1308 (2002; R 2007) Effect of Household Chemicals on Clear and Pigmented Organic Finishes

ASTM D2240 (2005; R 2010) Standard Test Method for Rubber Property - Durometer Hardness

ASTM D2621 (1987; R 2011) Infrared Identification of Vehicle Solids from Solvent-Reducible Paints

ASTM D2697 (2003; R 2008) Volume Nonvolatile Matter in Clear or Pigmented Coatings

ASTM D3335 (1985a; R 2009) Low Concentrations of Lead, Cadmium, and Cobalt in Paint by Atomic Absorption Spectroscopy

ASTM D3718 (1985a; R 2010) Low Concentrations of Chromium in Paint by Atomic Absorption Spectroscopy

SECTION 09 67 23.16 Page 1

REPAIR HANGAR 3087

FA4417-14-R-0038, Amendment 0002, Addendum 1

REPAIR HANGAR 3087 100609

ASTM D3925 (2002; R 2010) Sampling Liquid Paints and Related Pigmented Coatings

ASTM D412 (2006a; E 2008; R 2008) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D4541 (2009; E 2010) Pull-Off Strength of Coatings Using Portable Adhesion Testers

ASTM D6237 (2009) Painting Inspectors (Concrete and Masonry Substrates)

ASTM D638 (2010) Standard Test Method for Tensile Properties of Plastics

ASTM F1869 (2011) Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride

INTERNATIONAL CONCRETE REPAIR INSTITUTE (ICRI)

ICRI 03732 (1997) Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, and Polymer Overlays

THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC-TU 2/NACE 6G197 (1997) Design, Installation, and Maintenance of Coating Systems for Concrete Used in Secondary Containment

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910.1000 Air Contaminants

29 CFR 1910.134 Respiratory Protection

29 CFR 1926.59 Hazard Communication

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-04 Samples

Joint Sealant; G

Urethane Modified Concrete/Epoxy Laminate Flooring System; G

SD-06 Test Reports

Joint Sealant; G

Urethane Modified Concrete/Epoxy Laminate Flooring System; G

SECTION 09 67 23.16 Page 2

Grout Coat; G

Urethane Topcoat; G

Daily Inspection Report; G

Adhesion Testing; G

SD-07 Certificates

Work Plan; G

Flooring System Applicator Qualifications; G

Joint Sealant; G

Urethane Modified Concrete/Epoxy Laminate Flooring System; G

Warranty; G

SD-08 Manufacturer's Instructions

Joint Sealant; G

Urethane Modified Concrete/Epoxy Laminate Flooring System; G

Water-Based Alkaline Degreaser; G

SD-11 Closeout Submittals

Inspection Logbook; G

1.3 QUALITY ASSURANCE

1.3.1 Test Reports

1.3.1.1 Joint Sealant

Submit test results that confirm sealant complies with Table Ia requirements. Samples must have been tested within the last three years.

1.3.1.2 Urethane Modified Concrete/Epoxy Laminate Flooring System

Submit test results that confirm the urethane modified concrete/epoxy laminate flooring system complies with Table Ib requirements. Samples must have been tested within the last three years.

1.3.1.3 Urethane Topcoat

Submit test results that confirm urethane topcoat complies with Table Ie requirements. Samples must have been tested within the last three years.

1.3.1.4 Daily Inspection Report

Submit one copy of the daily inspection report to the Contracting Officer within 24 hours of the date recorded.

SECTION 09 67 23.16 Page 3

1.3.2 Certificates

1.3.2.1 Work Plan

Submit schedule to complete work within approximately twelve (12) consecutive calendar days. Submit a written plan describing in detail all phases of coating operations. Address work sequencing, surface preparation, flooring system application, recoat and cure time projections, as well as how each step will be controlled, tested, and evaluated.

Address safety measures, work scheduling around weather, and record keeping. Assign one supervisor to the job who is to remain on site throughout all phases of work and who is to act as the contractor's primary point of contact. Identify this person in the submitted schedule.

1.3.2.2 Flooring System Applicator Qualifications

Minimum requirements for the installation contractor are as follows:

Completed three or more jobs within the past two years applying the specified materials to concrete surfaces in which the total area exceeds 200,000 square feet. Submit documentation listing location of work, point of contact at job site, total square footage of applied materials, per job for work totaling 200,000 square feet within the past two years. In addition to the above requirements, installation contractor shall be acceptable to by the material manufacturer to install the submitted coatings. Submit copy of certificates.

1.3.2.3 Joint Sealant

Submit literature documenting the sealant's past performance in automotive and/or aircraft maintenance shops. Minimum requirements are two or more maintenance shops with joint work totaling 10,000 linear feet whereby the sealant has performed for two years with less than one percent combined sealant failures and defects. Include from sealant manufacturer a list of shop locations, total linear feet of sealant applied per shop, shop point of contact, date sealant was applied, and the name of the installed sealant material.

1.3.2.4 Moisture Vapor Transmission Reducing Urethane Modified Concrete/Epoxy Laminate Flooring System

Submit literature documenting the coating system's past performance in aircraft maintenance shops and over floors with high Moisture Vapor Emission (MVE) rates. Minimum requirements are two or more aircraft maintenance shops totaling 34,000 square feet where the coating system has performed for two years with less than 0.05 percent combined premature coating failures, material defects and surface discoloration; no more than

0.03 percent discoloration from aviation chemicals, tire plasticizers, and UV exposure. Include from flooring manufacturer a list of shop locations, total coated area per shop, shop point of contact, date coating system was applied, and the names of the installed coating materials.

1.3.2.5 Warranty

Warrantee materials and workmanship for a minimum of one year following completion of flooring and sealant application. The following terms and conditions form a part of the warranty: If the applied coating system develops blisters (chemical), checks, softening, or lifting within one year following application, rework each area by installation contractor at contractor's expense. The following conditions are excluded from the

SECTION 09 67 23.16 Page 4 warranty: A) Concrete cracking, flooring system mirrors cracks in concrete, B) cosmetic imperfections due to scratching and gouging, C) application to metallic concrete finishes (Section 09 97 23 METALLIC TYPE CONDUCTIVE/SPARK RESISTANT CONCRETE FLOOR FINISH), and D) application to concrete with a MVE rate greater than 5.0 pounds moisture per 24 hours, 1000 square feet. If the coating system's adhesion is in question, perform one adhesion test per 100 square feet as described in the Article entitled "ADHESION TESTING."

To satisfy the warranty, adhesion testing shall produce cohesive failures within the concrete, concrete removal over 95 percent of each pull-off coupon, and/or adhesion no less than 400 psi. Each area failing to meet adhesion requirements shall require two additional adhesion tests to confirm results. Within the warranty period, remove to sound material and rework all areas unable to meet adhesion requirements. Zero percent sealant failures within one year is required. Within the warranty period, remove and rework all sealant material with chemically attacked surfaces and/or lifting from joint walls. Topcoat cracking over sealant is excluded from warranty.

1.3.3 Manufacturer's Instructions

1.3.3.1 Joint Sealant

Submit manufacturer's printed instructions to include detailed application procedures, minimum and maximum application temperatures, and curing procedures. In accordance with 29 CFR 1926.59, include Material Safety Data Sheets (MSDS) for the sealant to be used at the job site.

1.3.3.2 Urethane Modified Concrete/Epoxy Laminate Flooring System

Submit manufacturer's printed instructions to include detailed mixing, minimum and maximum application temperatures, acceptable atmospheric and/or interior climatic conditions, application procedures, curing procedures, and procedures for flooring system maintenance cleaning. Provide explicit instructions detailing surface preparation, recoat windows and remedial actions in case recoat windows are missed, and, if applicable, solvent-wiping between coats with acceptable types and grades of solvents.

In accordance with 29 CFR 1926.59, include MSDSs for the coatings to be used at the job site.

1.3.3.3 Water-Based Alkaline Degreaser

Submit manufacturer's printed instructions to include detailed mixing, dilution rate, application procedures, and rinsing procedures. In accordance with 29 CFR 1926.59, include MSDSs for the water-based alkaline degreaser to be used at the job site.

1.4 DELIVERY, STORAGE, AND HANDLING

Store coatings and sealant in spaces with temperatures from 40 to 75 degrees F. Inspect materials on site for damage prior to use. Return to manufacturer any packaged materials in dented, rusty, or leaking containers. Return to manufacturer materials with an expired shelf life for testing, and if compliant, reissuing of shelf life extension.

1.5 COATING HAZARDS

Ensure that employees are trained in all safety plan aspects. Follow the coating manufacturer's written safety precautions throughout mixing, application, and curing of coatings. Comply with respiratory protection

SECTION 09 67 23.16 Page 5 requirements in 29 CFR 1910.134 and safe levels of airborne contaminants in

29 CFR 1910.1000.

1.6 JOB SITE REFERENCES

Make available to the Contracting Officer at least one copy each of ASTM D4541, ASTM D6237, SSPC-TU 2/NACE 6G197, and ICRI 03732, including replica standards ICRI-CSP 1 through ICRI-CSP 9, at the job site.

1.7 PATCH TEST DEMONSTRATION

Prior to the submitted flooring system's approval, apply the complete flooring system to a 10 foot by 10 footsquare concrete section as prepared in accordance with Part 3 "EXECUTION." Within this area, perform three adhesion tests using procedures as detailed in the Article entitled "ADHESION TESTING." If adhesion testing produces cohesive failures within the concrete, no less than 40 milsconcrete removed over 95 percent of each pull-off coupon, and/or adhesion more than 400 psi, patch test adhesion is acceptable. If concrete surface preparation was insufficient, apply an additional coating system patch to properly prepared concrete followed by the above adhesion testing. If adhesion results are unacceptable for both the topcoat and the coatings below the grout coat, submit a new coating system manufactured by a different coating vendor. Apply new coating system to a patch and subject this patch to the above requirements for adhesion prior to approval. If customer dislikes non-skid grit application, adjustments to the specifications can be made. Grit coarser than #60 aluminum oxide is not recommended. Immediately following "passing" adhesion results, remove urethane topcoats and grout coat by sanding, repair patch test holes using epoxy mortar, and place a "Key-In Termination" adjacent patch test perimeter. Coarse scarification and/or pneumatic scabbling can be required to remove patch tests failing to meet adhesion requirements.

PART 2 PRODUCTS

2.1 JOINT SEALANT

Formulate the joint sealant to exhibit the properties as listed in Table Ia.

2.2 MOISTURE VAPOR TRANMSISSION REDUCING URETHANE MODIFED CONCRETE/EPOXY

LAMINATE FLOORING SYSTEM

A three-coat flooring system consisting of urethane modified concrete/epoxy laminate grout coat, and urethane topcoat. Apply the system at a nominal thickness of 1/8 inch utilize a non-skid broadcast aggregate. Formulate the complete flooring system to exhibit the properties listed in Table Ib.

Additional requirements for urethane modified concrete/epoxy laminate, grout coat, and urethane top coat are contained in the following sub-paragraphs.

2.2.1 Urethane Modified Concrete

In addition to the urethane modified concrete/epoxy laminate flooring system requirements, formulate the urethane modified concrete coat to exhibit the properties as listed in Table Ic.

2.2.2 Grout Coat

In addition to the urethane modified concrete/epoxy laminate flooring

SECTION 09 67 23.16 Page 6 system requirements, formulate the grout coat to exhibit the properties as listed in Table Id.

TABLE I

MATERIAL REQUIREMENTS

Table Id - Grout Coat (Tnemec Power-Tread Series 237)

Test Minimum Requirement (maximum where indicated)

Resin System (ASTM D2621) Modified Polyamine Epoxy

Percent Volume Solids (ASTM D2697) 100 percent

Color 00WH (Tnemec White), or 31GR (Slate Gray)

Hardness (ASTM D2240: Shore D) 87

Adhesion to Urethane Modified Concrete/Epoxy Laminate (ASTM D4541)

400 psi

2.2.3 Urethane Topcoat

In addition to the urethane modified concrete/epoxy laminate flooring system requirements, formulate the urethane topcoat to exhibit the properties as listed in Table Ie.

TABLE I

MATERIAL REQUIREMENTS

Table Ie - Urethane Topcoat (Tnemec CRU Series 290)

Test Minimum Requirement (maximum where indicated)

Resin System (ASTM D2621) Aliphatic Polyester Polyurethane

Percent Volume Solids (ASTM D2697) 67 percent

Topcoat Color (FED-STD-595) 00WH (Tnemec White), or 31GR (Slate Gray)

Walkway Stripe Color: Red/Orange, semi-gloss (FED-STD-595)

22197 (red/orange)

Application Thickness per Coat 2.0 to 3.0 mils Dry Film Thickness(DFT)

Hiding Power: Red/Orange Complete hiding of white coatings at

3.0 mils DFT (one coat)

SECTION 09 67 23.16 Page 7

TABLE I

MATERIAL REQUIREMENTS

Table Ie - Urethane Topcoat (Tnemec CRU Series 290)

Test Minimum Requirement (maximum where indicated)

Sunlight Resistance Non-yellowing

Heat Resistance, continuous exposure 140 degrees F

Heat Resistance, intermittent exposure

200 degrees F

Chemical Resistance to JP-8 plus 100 Fuel at 70 degrees F (ASTM D1308)(see note 1)

48 hours immersion: 1.0 percent (max) weight increase, 1.0 percent (max) volume increase, 1.0 percent (max) weight loss

Chemical Resistance to Motor Oils at 70 degrees F (ASTM D1308) (see note 1)

48 hours immersion: 1.0 percent (max) weight increase, 1.0 percent (max) volume increase, 1.0 percent (max) weight loss

Chemical Resistance to Skydrols at 70 degrees F (ASTM D1308) (see note 1)

48 hours immersion: 1.0 percent (max) weight increase, 1.0 percent (max) volume increase, 1.0 percent (max) weight loss

2.3 PREAPPROVED MATERIALS

Acceptable manufactuere: The TNEMED Company, Inc. 6800 Corporate Drive, Kansas City, MO 64120 (Basis of Design and Standard of Quality).

Contact: SteelCon coating Systems, Inc. Buddy Stanford (850) 637-5489.

PART 3 EXECUTION

3.1 COATING SAMPLE COLLECTION

The Contracting Officer and QC Manager shall witness all material sampling.

Notify the Contracting Officer a minimum of three days in advance of sampling. Obtain liquid samples of each component (eg., primer, intermediate, grout coat, topcoat) by random selection from sealed containers and in accordance with ASTM D3925. Samples may be either individual cans of liquid material or 1.0 quartquantities of properly mixed, extracted, and sealed liquid material. Label samples by designated name, specification number, batch number, project contract number, sample date, intended use, and quantity involved. When the applied urethane modified concrete/epoxy laminate system has met the requirements defined in the Article entitled "ADHESION TESTING," return coating samples to the installation contractor for proper disposal.

3.2 JOINT MATERIAL REMOVAL, RE-SAW CUTTING, CRACK CHASING

Remove existing material 100 percent in all joints including material bonded to joint walls and base. Rigid material may require saw cutting

SECTION 09 67 23.16 Page 8 equipment to remove. Joints may be widened up to 1/8 inchwhen re-saw cutting. Chase concrete cracks identified for repair and open to a minimum depth of 1/2 inch below crack surface, resulting in crack(s) with smooth vertical walls.

3.3 DEGREASING

On both previously coated and uncoated concrete, degrease entire floor by scrubbing using a hot potable water solution, 120 to 170 degrees F, and a concentrated water-based alkaline degreaser. Perform two complete degreasing cycles on the entire floor surface. Allow solution to soak into surfaces prior to scrubbing and remove using hot potable water under a minimum of 4,000 psi. Rinsing shall be complete when the rinse water appears clear. If the industrial detergent is not biodegradable, collect all rinse water and dispose of as hazardous waste. Squeegees and shop vacuums may be used to collect pooling rinse water. Fans may be used to aid drying of floor surfaces.

3.4 COATING SYSTEM REMOVAL

Remove existing coating system 100 percent employing one or more of the following techniques: shot blasting, chipping, scraping, sanding, scarification, high pressure water blasting, and various hand tools.

Impact tools such as scabblers may be used to remove unsound urethane modified concrete/epoxy laminate flooring systems. In general, a coating system cannot be completely removed by shot blasting and, to attain 100 percent coating removal, requires a combination of the above techniques.

3.5 SURFACE PREPARATION

Shot blast entire floor to produce a level of coarseness equal to ICRI 03732 CSP 3. Overlap each shot blasting pass by 1/4 to 1/2 inch. Add new shot to shot blasting equipment prior to blasting. Prepare concrete surfaces inaccessible to shot blasting, perimeter wall bases and under secured equipment, using a diamond disk grinding and/or light scarification to produce a level of coarseness equal to ICRI 03732CSP 2, ICRI 03732 CSP 4, respectively. Resulting surfaces shall appear clean and contain the appropriate surface coarseness level. If the resulting cleanliness level cannot be determined, place numerous drops of water on surfaces that appear contaminated. If the water drops soak into concrete, the surfaces are hydrocarbon contamination free (oils, grease, skydrol). If the water drops bead up and do not flatten out, surfaces require additional degreasing as detailed in the Article entitled "DEGREASING." Shot blasting coarse concrete and/or broom finished concrete can produce a coarseness level equal to ICRI 03732 CSP 5: employ a best effort attempt to minimize excessive removal of coarse concrete material. If coarse concrete is encountered, shot blasting to a level of coarseness equal to ICRI 03732 CSP 5 is acceptable: however, extremely coarse concrete can require resurfacing prior to the flooring system's installation. Sweep, vacuum, and run a high powered magnet over all surfaces to be coated, including joints.

3.6 KEY-IN TERMINATIONS

Place the "Key-In" termination as detailed in SSPC-TU 2/NACE 6G197 Figure 8 at transition surfaces, directly below doorways, and adjacent walls, floor drains, drain grates (interior side), and all other obstructions embedded into the floor slab. The Key-In termination shall contain one vertical wall at a depth from 3/8 to 5/8 inchand, leading down to the resulting vertical depth, a sloped surface from 1-1/2 to 2 inches. A hand held

SECTION 09 67 23.16 Page 9 concrete saw can be used to cut the correct vertical depth followed by power tool grinding to create a sloped surface. Remove concrete dust by vacuuming.

3.7 CRACK REPAIRS

Use the "Elastomeric Underlayer Crack-Bridging Design" as detailed in SSPC-TU 2/NACE 6G197 Figure 7 over the surface of urethane modified concrete filled cracks.

3.7.1 Install Bondbreaker

Install bondbreaker, either solvent resistant bondbreaker tape or a 1/8 to 1/4 inch 30/50 mesh silica sand layer, to the base of previously chased cracks identified for repair. For cracks without a rigid base, install suitably sized fiberboard to a depth of 1/2 inchbelow floor level and with bondbreaker over exposed fiberboard. Install bondbreaker to cover the crack's horizontal base and continuously span the entire crack length.

Bondbreaker application prevents epoxy mortar from penetrating deep into cracks. Use bondbreaker tape no more than 6 milsthick. In this application, the use of backer rod is prohibited.

3.7.2 Repair Cracks

Repair cracks utilizing laminate flooring standard construction details guide.

3.8 PRE-APPLICATION TESTING FOR CONTAMINATION

Spot check surfaces for oil/grease contamination using the water break test. At a rate of 5 tests per 1000 square feet place one to two water drops onto surfaces and observe for beading. Test all other surfaces that show visible signs of potential contamination. Perform additional degreasing to surfaces displaying water beading in accordance with the Article entitled "DEGREASING."

3.9 COATING APPLICATION

Prior to the flooring system application, vacuum flooring space and mark all joints.

3.9.1 Isolation (Expansion) and Construction Joint Treatment

Install into each isolation (expansion) and construction joint, a continuous length of round polyethylene backer rod flush with the floor's surface and under 30 percent compression. Backer rod placement prevents urethane modified concrete/epoxy laminate from penetrating into isolation and construction joints.

3.9.2 Contraction Joint Treatment

Apply primer and urethane modified concrete/epoxy laminate directly into all contraction joints. This quantity is in addition to the specified 1/4 inch urethane modified concrete/epoxy laminate thickness. This step may be performed either prior to, or during, the full urethane modified concrete/epoxy laminate application.

SECTION 09 67 23.16 Page 10

3.9.3 urethane Modified Concrete Laminate Application

Apply Tnemec Series 241 Ultra-Tread MVT directly to prepared concrete using a 1/2" v-notch squeegee or trowel and backroll using a loop roller to level trowel marks and waves. Immediately follow by broadcasting to refusal with 30/50 mesh aggregate. After coating is cured sweep off excess to prepare for Grout Coat Application.

3.9.4 Grout Coat Application

Apply Tnemec Series 237 Power-Tread grout coat to Urethane Modified Concrete at a rate of 12.0 to 16.0 mils dry film thickness (DFT). Refer to manufacturers printed data for recoat and application information.

3.9.5 Saw Cutting and Sealing Joints

Use the "Conventional Sealed Joint" as detailed in Figure 1 of SSPC-TU 2/NACE 6G197 to seal each contraction and expansion joint. Take care to reduce contamination from saw cutting equipment and foot traffic.

Limit floor access to essential contractor personnel. When performing joint work, including saw cutting, suggest placing clean rolled cardboard adjacent joint surfaces to reduce coating system contamination.

3.9.5.1 Saw Cut Contraction Joints

Place saw cuts directly in the middle of each contraction joint 1/4 inch wide, placed to a minimum depth of 1-1/4 inches, and span the joint's entire length.

3.9.5.2 Saw Cut Isolation (Expansion) and Construction Joints

Place saw cuts to the isolation (expansion) and construction joint's original width and to a minimum depth of 1-1/4 inches. Completely remove the urethane modified concrete/epoxy laminate across the joint's width and further remove the previously installed backer rod.

3.9.5.3 Install Backer Rod

Install a continuous length of round, closed-cell polyethylene backer rod into each saw cut. For 1/2, 3/8 and 1/4 inch wide saw cuts, place backer rod to a depth of 3/8 inch below the grout coat's surface the highest point on the backer rod. For expansion joint saw cuts greater than or equal to 3/4 inch wide, place backer rod to a depth of 5/8 inch below the grout coat's surface. Fit backer rod tight between joint walls under 30 percent compression and place using a backer rod tool. Remove and reinstall all backer rod that is the incorrect size or at the incorrect depth. Following backer rod installation, apply painter's tape to surfaces adjacent joints to protect from sealant.

3.9.5.4 Joint Sealant Application

Apply sealant directly into joints using a bulk-caulking gun. At room temperature, the resulting sealant application shall exhibit a concave recess between 1/8 to 1/24 inch below the grout coat's surface. Remove and reapply cured sealant remaining either flush or greater. Following sealant application, remove painter's tape and sealant drips on grout coat. Prior to topcoating, cure sealant a minimum of 24 hours.

SECTION 09 67 23.16 Page 11

3.9.6 Application of Topcoat

Apply a full cost of Tnemec Series 290 CRU chemical resistant urethane topcoat at a spreading rate of 2.0 to 3.0 mils Dry Film Thickness (DFT).

Stripe coat perimeter edges adn around equipment footings. Monitor and record a minum of one Wet Film thickness (WFT) reading per 600 square foot section of floor surface. Sealant is to be lightly coated.

3.9.6.1 Topcoat

Apply a full coat of urethane topcoat at a spreading rate from 2.5 to 3.2 mils Dry Film Thickness (DFT). Stripe coat perimeter edges and around equipment footings. Monitor and record a minimum of one Wet Film Thickness (WFT) reading per 600 square foot section of floor surface. Sealant is to be lightly coated.

3.9.6.2 Walkway Stripes

Place the walkway stripe and grounding rod marker, if applicable, according to Government drawings. When the second topcoat is within its recoat window, apply a walkway stripe of the red/orange Tnemec Series 290 CRU chemical resistant urethane topcoat at 2.0 to 3.0 mils DFT. Lightly broadcast non-skid grit into the wet walkway stripe. Use solvent resistant tape to protect the floor coating against stripe coat bleed. Completely hide the topcoat color with the red/orange stripe, in one coat. If insufficient hiding occurs, apply one additional walkway stripe coat.

Apply grounding rod markings using similar procedures, urethane topcoat, and colors and size according to Government drawings.

3.10 CURING

Installed materials shall cure and display performance equal to manufacturer's product literature. Remove and reapply improperly cured material.

3.11 FIELD TESTS AND INSPECTION

3.11.1 Coating Inspector

Consider the Coating Inspector a QC Specialist, working for the QC Manager, and be qualified in accordance with Section 01 45 00.00 10 01 45 00.00 20 01 45 00.00 40 QUALITY CONTROL. The Coating Inspector will be present during all field tests, surface preparation, flooring application, initial cure of the flooring system, and during all flooring repair work. The Coating Inspector will provide all tools/equipment necessary to perform field tests and inspection. The Coating Inspector will be responsible for field tests and specified level of inspection.

3.11.2 Inspection

Document weather conditions, job site occurrences, and report conditions and occurrences potentially detrimental to the flooring system. The listed inspection requirements are in addition to the QC inspection and reporting requirements defined in Section 01 45 00.00 10 01 45 00.00 20 01 45 00.00 40 QUALITY CONTROL. The Coating Prepare a project reference sheet outlining all requirements, tests, test methods, and evaluation criteria, and hold regular meetings with contractor personnel, including shot blasting operators and applicators, to review requirements/evaluation criteria for upcoming work prior to execution. At the start of coating

SECTION 09 67 23.16 Page 12 operations and every 1.0 hour following until daily work is complete, record air temperature, substrate temperature, and relative humidity.

Following each coat application, inspect surfaces for improperly cured material, blisters, inadequate and/or excessive coating thickness, and other defects. Document each inspection, test, non-compliant area, and location of each non-compliant area. List evaluation method, evaluation criteria, areas requiring rework, and all other pertinent observations.

3.11.2.1 Daily Inspection Report

Submit to the Contracting Officer one copy of the daily inspection report completed each day when performing work under this Section. Use Appendix X1 "Inspection Checklist" of ASTM D6237 to monitor daily activity and to assist in preparing the daily inspection report. Note each non-compliant issue and each issue identified for rework in accordance with the QC documentation procedures in Section 01 45 00.00 10 01 45 00.00 20 01 45 00.00 40 QUALITY CONTROL. Use of forms containing entry blocks for all required data is encouraged. Present the data in a legible and professional format. Submit report within 24 hours of the report date.

3.11.2.2 Inspection Logbook

Record all daily activity related to this Section in the Inspection Logbook. Record the daily inspection reports, as well as all other pertinent observations and information, in the logbook. Use a hard or spiral bound book with consecutively numbered pages. Prior to final payment, submit original Inspection Logbook to the Contracting Officer upon completion of project.

3.11.2.3 Inspection Equipment

Use equipment in good condition, operational within its design range, and calibrated as required by the specified standard for each device.

3.11.3 Adhesion Testing

Perform a minimum of three modified adhesion tests (ASTM D4541) on the topcoat no less than forty-eight hours following application. Select three random flooring locations spaced a minimum of 20 feet between each location. Vertically core completely through the urethane modified concret/epoxy laminate flooring system and a minimum of 3/8 inch into concrete using a suitable drill fitted with a 1 inch diameter core bit.

Throughout coring, a employ a best effort attempt to avoid fracturing and/or overheating both the mortar system and concrete: improper coring can affect adhesion results. Adhere directly to each cored surface's center a 3/4 inch diameter pull-off coupon. Lightly sand test area flooring surface prior to attaching pull-off coupons containing a grit-blasted anchor profile. When pull-off coupon adhesive has sufficiently cured, test adhesion and evaluate results. If testing produces cohesive failures within the concrete, no less than 40 mils concrete removal over 95 percent of each pull-off coupon, and/or adhesion more than 400 psi mortar system's adhesion is acceptable. If the above requirements are not satisfied, then perform one adhesion test per 100 square feet using the above procedures.

Two additional tests will confirm results for each non-compliant area.

Remove and rework all areas unable to meet adhesion requirements to sound material. Fill core holes using primer, sand-filled urethane modified concrete/epoxy laminate, grout coat, and urethane topcoats. Finish resulting repairs flush with adjacent coatings, displaying an equivalent appearance.

SECTION 09 67 23.16 Page 13

3.12 Final Cleanup

Following work completion, remove debris, equipment, and materials from site. Remove temporary connections to Government or contractor furnished water and electrical services. Restore existing facilities in and around the work areas to their original condition.

SECTION 09 67 23.16 Page 14

MATERIAL REQUIREMENTS

Table Ia - Sealant

Test Minimum Requirement (maximum where indicated)

Sealant System (two-pack:

self-leveling)

Polysulfide (Manganese Cure; MnO2) or Urethane

Percent Volume Solids 100 percent

Chemical Resistance to JP-8 plus 100 Fuel at 70 degrees F (ASTM D1308 ) (see note 1)

48 hours immersion: 2.0 percent (max) weight increase, 5.0 percent (max) volume increase, 2.0 percent (max) weight loss

Chemical Resistance to Motor Oils at 70 degrees F (ASTM D1308) (see note 1)

48 hours immersion: 2.0 percent (max) weight increase, 5.0 percent (max) volume increase, 2.0 percent (max) weight loss

Chemical Resistance to Skydrols at 70 degrees F (ASTM D1308) (see note 1)

48 hours immersion: 2.0 percent (max) weight increase, 5.0 percent (max) volume increase, 2.0 percent (max) weight loss

Hardness (ASTM D2240: Shore A) 20

Tensile Strength (ASTM D412) (or

ASTM D638)

150 psi

Percent Elongation (ASTM D412) (or

ASTM D638)

500 percent

Tack Free at 65 degrees F (ASTM C679

12 hours maximum

Adhesion to Sand Filled Epoxy Polyamine

140 psi

Adhesion to Urethane Topcoats (paintable sealant)

140 psi

NOTES: (1) Immerse and test a minimum three - 2 by 1/2 by 1/2 inch section of cured sealant.

SECTION 09 67 23.16 Page 15

MATERIAL REQUIREMENTS

Table Ib - Urethane Modified Concrete (Tnemec Ultra-Tread MUT Series 241)

Test Minimum Requirement (maximum where indicated)

Compression Strength )ASTM C579) 4,922 psi

Tensile Strength (ASTM C307) 1,015 psi

Adhesion to Concrete (ASTM D4541) (see note 1)

400 psi or 100 percent failure in concrete

Heat Resistance, continuous exposure 140 degrees F

Heat Resistance, intermittent exposure

200 degrees F

Coefficient of Thermal Expansion 0

- 210 degrees F (ASTM C531)

5.0 minus 33.0 times 10-6in/in degrees F

Thermal Compatibility between Concrete (ASTM C884/C884M)

"pass"

Chemical Resistance to JP-8 plus 100 Fuel at 70 degrees F (ASTM D1308 )(see note 2)

48 hours immersion: 2.0 percent (max) weight increase, 2.0 percent (max) volume increase, 2.0 percent (max) weight loss

Chemical Resistance to Motor Oils at 70 degrees F (ASTM D1308) (see note 2)

48 hours immersion: 2.0 percent (max) weight increase, 2.0 percent (max) volume increase, 2.0 percent (max) weight loss

Chemical Resistance to Skydrols at 70 degrees F (ASTM D1308) (see note 2)

48 hours immersion: 2.0 percent (max) weight increase, 2.0 percent (max) volume increase, 2.0 percent (max) weight loss

Lead (ASTM D3335 0.06 percent (max)

Cadmium (ASTM D3335) 0.06 percent (max)

Chromium (ASTM D3718) 0.00 percent

NOTES:

(1) When tested for adhesion, mortar system shall display 400 psi adhesion and/or remove no less than 40 mils of concrete over 95 percent of each pull-off coupon throughout service.

SECTION 09 67 23.16 Page 16

MATERIAL REQUIREMENTS

Table Ib - Urethane Modified Concrete (Tnemec Ultra-Tread MUT Series 241)

Test Minimum Requirement (maximum where indicated)

(2) Immediately following immersion, in addition to the listed requirements, mortar system shall be evaluated for blisters, checks, discoloration, softening, and lifting. Mortar system shall be visually free of blisters, checks, and discoloration, and display both substrate and intercoat adhesion no less than 350 psi (ASTM D4541).

SECTION 09 67 23.16 Page 17

MATERIAL REQUIREMENTS

Table Ic - Primer

Test Minimum Requirement (maximum where indicated)

Resin System (ASTM D2621) Epoxy Polyamine (two-pack)

Percent Volume Solids (ASTM D2697) 100 percent

Color Clear to Amber

Hydrolytic Stability (see note 1) No effect: 30 days immersion in Sodium Hydroxide solution with pH no less than 13.5

Moisture Insensitivity Throughout Service (ASTM F1869, ASTM D4541) (see note 2)

No effect: Insensitive to moisture vapor emission at rates no more than 4.5 pounds moisture/24 hours, 1000 square feet

Adhesion to Concrete Throughout Service (ASTM D4541) (see note 3)

400 psi or or 100 percent failure in concrete

NOTES:

(1) Immediately following immersion, evaluate primer for blisters, checks, discoloration, softening, and substrate lifting. Primer shall be visually free of blisters, checks and moderate discoloration, and display wet adhesion no less than 350 psi (ASTM D4541).

(2) During and following application, primer shall remain unaffected by Moisture Vapor Emission (MVE) at rates no more than 4.5 pounds moisture per 24 hours, 1000 square feet: primer shall meet the requirements of note 3. Signs of moisture sensitivity include blisters, softening, lifting, and discoloration (whitening).

(3) When tested for in-situ adhesion, primer shall display 400 psi adhesion and/or remove no less than 40 mils of concrete over 95 percent off each pull-off coupon.

SECTION 09 67 23.16 Page 18

TABLE II

PREAPPROVED MATERIALS*

Vendors Materials

Tnemec Company, Inc.

6800 Corporate Drive Kansas City, MO 64120

Contact:

SteelCon Coating Systems, Inc.

Buddy Stanford

(850) 637-5489

Urethane Modified Concrete/Epoxy Laminate: Ultra-Tread MVT Series 241

Grout Coat: Power-Tread Series 237 Topcoat: CRU Series 290

SECTION 09 67 23.16 Page 19

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SECTION 09 67 23.16 Page 20