FE-100 Epoxy Liner for Concrete Sewer Manholes and Structures
 

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Application Specifications

1          PART 1 – GENERAL

1.1          DESCRIPTION

A        Scope: The supply and installation of a sprayable/brushable two component epoxy liner for the interior walls of concrete manholes, junction boxes, wet wells and value vaults to provide protection from corrosive sewer gases. Coating shall be PINHOLE FREE.

B        Responsibility: Contractor shall bear complete responsibility for the satisfactory performance of the system, including materials, surface preparation, application, inspection and quality assurance procedures.

1.2          SUBMITTALS

A        Shop Drawing Submittals:

1.      Technical data on the product, including catalogue cut sheets.

2.      Installation procedures, including shop and field application techniques.

2          PART 2 – PRODUCTS

2.1          MATERIALS

A        Provide a sprayable/brushable two-component epoxy coating composed of 100% solids. Product shall be FE-100 as supplied by Polyurea Coating Systems, Inc., or approved equal.

B        A primer is recommended prior to applying FE-100. PCSI's PCS-30 penetrating primer is a two-component 100% solids epoxy system designed to improve adhesion and reduce pin holes.

C        Te material shall be suitable for overhead, vertical and horizontal surfaces.

D        The material is to provide a permanent impermeable, high strength, chemically resistant monolithic lining for concrete manholes, junction boxes, wet wells and valve vaults.

E        Chemical Resistant Characteristics

Immersion Exposure                        Resistance

Sulfuric Acid (15% Soln.)                    Excellent

Sodium Hydroxide (20% Soln.)           Excellent

Detergent                                            Excellent

Bleach                                                 Excellent

Gasoline                                              Excellent   

3          PART 3 - EXECUTIVE                  

3.1        SURFACE PREPARATION

A        All surfaces must be clean and structurally sound. Repair any defects.

B       Any form release agent, curing agent, concrete hardener or other contaminant must be completely removed prior to coating.

C       Use a 3,000 psi waterblast system to blast the interior surfaces. Remove all loose or foreign matter, laitance, oil, grease, rust, detergents, glaze or other surface contaminants.

D       All hydrostatic leaks in the structure wall must be repaired prior to applying the epoxy.

E        Bug holes and other surface imperfections must be filled with a non-shrink type cement filler that is compatible with the coating system and recommended by the coatings supplier.

3.2          APPLICATION PROCEDURE 

A       The surface must be cleaned of any water blasting residue.

B        Equipment and Application Rate:

1.      Airless spray equipment capable of 4,000 psi pressure is required for application.

2.      Minimum dry film thickness on structures shall be a total of 65 mils.

3.      Coating shall be applied in multiple coats if necessary to prevent sagging in accordance with the manufacturer's recommendations.

C        Contractor shall follow the manufacturer's recommendation regarding product pot life, cure time, substrate and ambient air temperatures during application.

D        The Contractor shall use an accurate wet film gauge in at least two locations per square yard during application to check film thickness as applied.

E        Holiday Detection: At the Engineer's direction and at the City's expense, all coated surfaces may be inspected for holidays using an electronic voltage instrument specifically designed for the purpose. The voltage applied shall be 100 volts per mil of thickness up to a maximum of 50% of the minimum specified coating thickness. Inadequately coated surfaces damaged by the voltage instrument shall be repaired at no cost to the City. All holidays shall be plainly marked for repair. Coating shall be PINHOLE FREE.

F        Dry Film Thickness Inspection: At the Engineer's direction and at the City's expense, destructive dry film thickness measurements shall be performed in accordance with SSPC PA-2 guidelines for frequency of sampling, average of sample, results, minimum acceptable value for any one sample result, etc. The minimum average dry film thickness of the epoxy coating (in accordance with SSPC PA-2) shall be 65mils.

G       Application Log: A daily log shall be kept showing date, weather conditions, quantity of structure lined (square footage) and number of gallons of lining compound expended.

H        Touch-up and Repairs: Trowel brush, roller or squeegee may be used for touch-up and repairs.

3.3          SAFETY AND VENTILATION

A        All application procedures must be performed in accordance with OSHA and NIOSH requirements. In confined areas, workmen must wear fresh airline respirators or positive pressure hose masks. Protective clothing, goggles and gloves must be worn to protect eyes and skin from contact with the material. Where flammable solvents exist, explosion proof lighting must be used. Requirements of the Material Safety Data Sheets and the manufacturer's recommendation regarding safe procedures must be rigidly adhered to.

3.4          LIMITS OF COVERAGE

A        Interior concrete structure walls and ceiling shall be covered with epoxy coating FE-100.