early strength, hand-applied cementitious materials for stopping infiltrating water and
making 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 manufactured by The Strong Company, Inc., Raven Lining Systems, Madewell
Products Corporation, Quadex, Inc., or Engineer-approved equal.
D. Epoxy coating shall be high-build, shall 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 coating shall be Raven 405 by Raven Lining Systems, Mainstay DS-5 by
Madewell Products Corporation, SprayWall by Sprayroq, S-301 Epoxy Spray System by
Warren Environmental, Inc., or Engineer-approved equal. Epoxy coating shall meet the
following requirements at a minimum:
1. Shore D Hardness: 85 (per ASTM D2240)
2. Compressive Strength: 12,000 psi (per ASTM D695)
3. Tensile Strength: 6,800 psi (per ASTM D638)
4. Flexural Strength: 11,000 psi (per ASTM D790)
5. Minimum Finished Dry Thickness: 125 mils
6. Adhesion to Concrete: Substrate failure (per ASTM D7234)
E. Cementitious base coat shall be a pumpable, Portland-based microsilica cement or
calcium aluminate cement. If the epoxy coating manufacturer also manufactures a
cementitious base coat, the cementitious base coat product shall be by the same
manufacturer as the epoxy top coat product. If the epoxy coating manufacturer does not
manufacture a cementitious base coat, the cementitious base coat product shall be
compatible with the epoxy top coat product. Contractor shall ensure compatibility
between the top coat product and cementitious base coat product. 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)
2019 CIPP Lining Project Manhole Rehabilitation
Nashua, NH 02800-6
