2.03
compatible with the lining material used. Infiltration control and patching materials shall
be as manufactured by The Strong Company, Inc., Raven Lining Systems, Madewell
Products Corporation, Quadex, Inc., or Engineer-approved equal.
Cementitious coating shall be a pumpable, Portland-based microsilica cement or calcium
aluminate cement. Cementitious base coat shall be Raven 705CA by Raven Lining
Systems, Mainstay ML-72 by Madewell Products Corporation, or Engineer-approved
equal. Cementitious base coat, when cured, shall meet the following requirements at 28
days at a minimum:
1. Compressive Strength: 9,200 psi (per ASTM C109)
2. Tensile Strength: 685 psi (per ASTM C496)
3. Flexural Strength: 1,200 psi (per ASTM C293)
4. Minimum Finished Dry Thickness: As specified in 3.02, Paragraph H herein
5. Bond Strength: 2,000 psi (per ASTM C882)
INTERNAL-LINER SYSTEM (EPOXY):
The internal liner system shall be specifically designed for a minimum service life of 50
years, to continuously bond to the substrate, to withstand a temperature range of 0
degrees to 100 degrees Fahrenheit, to restore the interior of the manhole, to withstand the
corrosive gases of domestic wastewater (especially hydrogen sulfide), to eliminate the
infiltration of groundwater through the manhole walls and mortar joints, and to be
structurally capable of withstanding the pressure of groundwater based on the depth of the
specific manhole being lined.
The internal liner system shall be a 100 percent solids epoxy 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
all 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 requirements 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
2019 CIPP Lining Project Manhole Rehabilitation
Nashua, NH 02800-5
