infiltration of groundwater through the manhole walls and morta’ joints, and to be
structurally caoable of withstanding the pressure of groundwater based on the depth of the
specific manhole being lined.
The internal liner system shall be a multilayered polyurethane/polymeric stress skin panel
system, a 100 percent solids eooxy or polyurethane coating, or a composite systen
consisting of an esoxy or polyurethane top coat over a cementitious base coat. Infiltration
control, patching material, and/or a cementitious base coat may be necessary depending
on the extent of the manhole corrosion, damage, substrate profile, loss of material, and
infiltration. All materials used shall be completely compatible with al other manhole
rehabilitation products being used. Contractor shall ensure compatibility of all products
with the individual material manufacturers.
Where necessary, infiltration control and patching materials shall be installed in
accordance with the lining manufacturer's requirenents prior to installing the lining
system to control active infiltration and repair voids in the existing manhole walls or
damaged inverts. Infiltration control and patching materials shall be rapid-setting, high
early strength, hand-aoplied cementitious materials for stopping infiltrating water and
meking repairs to concrete, brick, or other masonry-constructed manholes. The materials
shall be non-shrinking, nonmetallic, and non-corrosive. The materials shall be compatible
with the lining material used. Infiltration control and patching materials shall be as
menufactured by The Strong Company, Inc., Raven Lining Systems, Madewell Products
Corporation, Quadex, Inc., or Engineer-approved equal.
Multilayered polyurethane/polymeric stress skin panel systen shall consist of a moisture
berrier, surfacer, and final corrosion barrier. Multilayeed pand systen shall be
SpectraSnield by CCI Spectrum, Inc. or Engineer-aoproved equal. Multilayered panel
system shall meet the following requirements at aminimum:
1. Shore A Hardness: 95 (per ASTM D2240)
2. Elongation: 300 percent (pe ASTM D412)
3. Tensile Strength: 2,400 psi (per ASTM D412)
4. Teer Strength: 500 pounds/linear inch (per ASTM D624)
5. Sheer Strength: 225 psi (per ASTM C273)
6. Finished Dry Thickness: 500 mils
7. Adhesion to Concrete: Substrate failure (per ASTM D7234)
Epoxy or polyurethane coating shall be high-build, snall be 100 percent solids, and shall
contain no volatile organic compounds. Coating shall be suitable for use as a trowel-
applied or spray-applied monolithic surfacing at the minimum dry film thickness specified
herein. Epoxy or polyurethane coating shall be Raven 405 by Raven Lining Systens,
Mainstay DS-5 by Madewell Products Corporation, SprayWall by Sprayrog, S-301 Epoxy
02800-4
