Spray System by Warren Environmental, Inc., or Engineer-aoproved equal. Epoxy or
polyurethane coating shall meet the following requirements at aminimum:
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 Finished Dry Thickness: 125 mils
6. Adhesion to Concrete: Substrate failure (per ASTM D7234)
Cementitious base coat shall be a pumpable, Portland-based microsilica cement or
calcium aluminate cement. If the eooxy or polyurethane coating manufacturer also
manufactures a cementitious base coat, the cementitious base coat product shall be by the
same manufacturer as the epoxy or polyurethane top coat product. If the epoxy or
polyurethane coating manufacturer does not manufacture a cementitious base coat, the
cementitious base coat product shall be compatible with the epoxy or polyurethane 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 aminimum:
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. Finished Dry Thickness: See Article 3.04, Paragraoh H herein
5 Bond Strength: 2,000 psi (pe ASTM C882)
PART 3 - EXECUTION
3.01
A.
3.02
GENERAL:
Contractor shall accurately field-measure and size the rehabilitation products for each
individual manhole. Each existing sewer manhole to be rehabilitated may have a different
configuration and varying field dimensions. All field measurements shall conform to the
requirements of the manufacturers of the rehabilitation products.
CHIMNEY SEAL (WHERE APPLICABLE):
All loose and protruding mortar, bricks, roots, aid anything else that might prevent proper
application of the chimney seal shall be removed prior to application.
02800-5
