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)
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.
2. Name(s) of all supervisory personnel that will be directly involved in the Project
3. Proposed product information showing compliance with the specified
requirements listed herein, including chimney seal, grout, and internal liner
material, and the respective manufacturer’ s installation instructions.
4. Documentation of certification of the Contractor, specialty technician, and/or
installer by the product manufacturer and/or its authorized representative
1.05
10.
11.
12.
13.
14.
ASTM D624 Standard Test Method for Tear Strength of Conventional
Vulcanized Rubber and Thermoplastic Elastomers
ASTM D638 Standard Test Method for Tensile Properties of Plastics
ASTM D695 Standard Test Method for Compressive Properties of Rigid
Plastics
ASTM D790 Standard Test Methods for Flexural Properties of
Unreinforced and Reinforced Plastics and Electrical
Insulating Materials
ASTM D2240 Standard Test Method for Rubber Property — Durometer
Hardness
SECTION 02800
MANHOLE REHABILITATION
PART 1 - GENERAL
1.01
A.
1.02
1.03
SCOPE OF WORK:
Provide all labor, materials, accessories, equipment, tools, and incidentals required to
renabilitate and test manholes as shown on the Drawings and as specified herein,
including surface preparation, flow diversion, inflow control, invert and channel
reconstruction, internal lining, chimney seals, and pipe connections.
No mark-up for Field Inspector services will be allowed. Only
documented NSTAR invoice amounts will be reimbursed to the
Contractor.
END OF SECTION
02769-18
D.
Item 4,
Item 5,
Ttem 6,
Hours
The unit price shall also include all other appurtenant materials and
work incidental thereto and not specifically included for payment
under other items.
Measurement for payment will be per connection and as approved by
the Engineer.
Excavation for Pneumatically Assisted Sliplining Pits
PART 4 — Measurement and Payment
4.1 SUMMARY
A.
Measurement and payment for all additional items included in this
Construction Change Directive shall be as described in Section 01025
Measurement and Payment of the Contract Documents.
4.2 ITEM DESCRIPTIONS
A.
B.
C.
Item 1,
1.
Item 2,
Item 3,
Pneumatic Hammer Assisted Sliplining
3.5
3.6
plug, one to attach a gauge for reading the air pressure in the sealed
line, and one to introduce air into the sealed line.
Low pressure air shall then be introduced into the sealed line until
the internal air pressure reaches 4.0 psig greater than the average
back pressure (the design groundwater pressure) on the pipe. At
least two minutes shall elapse to allow the pressure to stabilize.
3.4
C.
1.
2.
3.
4.
TESTING
A.
The contractor shall utilize a manufactured hardened steel host
pipe expansion head sized so that the expansion head forces and
internal host deflections away from passing HDPE renewal pipe, to
facilitate installation in a partially deflected host pipe.
Segmental Static Sliplining
During installation the Contractor shall pull the renewal pipe into
place utilizing a constant tension, variable speed pulling frame.
The frame shall:
