W912ES23Q0075 LD2_Monolith_Joint_Repair_SOW.pdf

LOCK AND DAM 2

MONOLITH JOINT REPAIR SOW

PART 1 GENERAL

1.1 SCOPE

The Contractor shall provide all labor, tools, materials, and equipment necessary to drill holes and perform work as described herein and as shown on the contract drawings. The work involves:

(1) Vertically drill 4-inch diameter holes in the lock wall monolith joints at the locations shown on the drawings.

(2) use an expansive rope/grout sock as a method to be used to prevent material washout.

(3) pressure injection of polyurethane resin to seal joints and prevent water seepage.

Locations for waterstops shall be marked by the Contractor and approved by the Contracting Officer before drilling commences.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C 920 (2011) Standard Specification for

Elastomeric Joint Sealants

ASTM C 1107/C 1107M (2008) Standard Specification for Packaged

Dry, Hydraulic-Cement Grout (Nonshrink)

ASTM D 1042

(2001) Standard Test Method for Linear

Dimensional Changes of Plastics under

Accelerated Service Conditions

ASTM D 1752

(2004a; R 2008) Standard Specification for

Preformed Sponge Rubber Cork and Recycled

PVC Expansion

ASTM D 2196

(2005) Standard Test Methods for

Rheological Properties of Non-Newtonian

Materials by Rotational (Brookfield type)

Viscometer

ASTM D 2369

(2010) Volatile Content of Coatings

ASTM D 3574

(2008) Standard Test Methods for Flexible

Cellular Materials—Slab, Bonded, and

Molded Urethane Foams

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 2008; Change 1-2010; Change 3-2010;

Errata 1-2010) Safety and Health Requirements

Manual

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Waterstops G

Shop drawings and fabrication drawings provided by the manufacturer or prepared by the Contractor.

SD-03 Product Data

Waterstops

Manufacturer's literature, including safety data sheets, for waterstops. Manufacturer's recommended instructions for installing waterstops.

Non-Shrink Grout Properties G, MAT

Descriptive literature of the grout proposed for use shall be furnished together with a certificate from the manufacturer stating that it is suitable for the application or exposure for which it is being considered. Prepackaged material requiring only the addition of water will be accepted based on certified laboratory test results showing that the material meets the requirements of ASTM C 1107/C 1107M, Grade C.

Joint Sealant G, MAT

Manufacturer's literature, showing that the material meets the requirements of ASTM C 920

Grout Sock G, MAT

Manufacturer’s published installation procedures to prevent polyurethane resin from being washed out by flowing water.

Expansive Rope G, MAT

Manufacturer’s published installation procedures to prevent polyurethane resin from being washed out by flowing water.

SD-07 Certificates

Polyurethane Resin G, MAT

The Contractor shall provide a notarized certification stating that the polyurethane resin meets the specified requirements and shall have the manufacturers current printed literature on the specified product.

Training Certificates

The Contractor shall have completed a factory trained contractor program given by the manufacturer of the specified product. This training must have included instruction in the use of polyurethane injection resins. The Contractor must submit a notarized certification from the manufacturer attesting to completion of the training.

1.4 DELIVERY STORAGE AND HANDLING

Deliver the specified products in original, unopened containers with manufacturers name, labels, product identification, and batch numbers intact. Store in a secured, dry, weatherproof location. Handle products to avoid damage to containers.

1.5 SITE ACCESS

Coordinate work with the current Lock 2 Lockmaster Steven Heidbrider at

(651) 290-5826. Provide the Lockmaster with a list of employee names, who will be working on site each day.

1.6 QUALITY ASSURANCE

The Contractor shall have completed a factory trained contractor program given by the manufacturer of the specified product. This training must have included instruction in the use of polyurethane injection resins.

1.7 INSTALLATION REQUIREMENTS

The Contractor shall not apply the material in the presence or forecast of precipitation unless precautions are taken to protect the material from moisture.

The Contractor shall take all precautions necessary to ensure no damage to the site occurs due to handling of the polyurethane resin.

1.8 MEASUREMENT AND PAYMENT

The Contractor shall be responsible for the work of this section, without any direct compensation being made other than the payment received for contract line items on the bidding schedule.

PART 2 PRODUCTS

2.1 POLYURETHANE RESIN MATERIALS

The polyurethane resin shall be designed specifically for sealing cracks and joints in concrete structures. The polyurethane resin shall be a hydrophilic nonflammable, low viscosity, liquid activated by contact with water. Upon contact with water the material shall expand quickly and cure to a tough, flexible closed-cell polyurethane foam.

2.1.1 Physical Properties of Uncured Polyurethane Resin

Solids Content: 83-100% solids ASTM D 2369

Viscosity: 350-800 cps at 73 Degrees F ASTM D 2196

2.1.2 Physical Properties of Cured Polyurethane Resin

Tensile Strength: >150 PSI ASTM D 3574

Elongation: >250% ASTM D 3574

Shrinkage: <10% ASTM D 1042

Density: 12-35 pcf ASTM D 3574

Free Rise Expansion: 400-600%

2.2 EXPANSIVE ROPE MATERIALS

The expansive rope shall be Natural jute rope comprised of strands, having a twist of approximately 1-1/4 turns per foot. The loose twist is easily unraveled to allow for fitting into joints or annular spaces from 1/2" to 2". When combined with polyurethane resin and water, the system swells to seal cracks, joints, and annular spaces.

2.2.1 Physical Properties of Expansive Rope

Weight: .4 lbs. / ft at 2” dia.

Diameter: Approximately 2” (8 strands twisted)

Material: Jute

Confirms to: Federal Specification HH-P-117

PART 3 EXECUTION

3.1 PREPARATION FOR WATERSTOP INJECTION

Mark location for waterstop and secure approval from Contracting Officer for that location.

Drill four-inch diameter hole, centered on the expansion joint to elevation 664.0 as shown on drawings. The drill hole shall not vary from vertical by more than ½-inch for the depth of the hole. Holes may be drilled with either core drill or percussion rotary drill methods.

Flush the hole with clean water.

3.1.1 Drill Hole Verification

If core drilling is used, the cores shall be retained and checked to verify that the drilling has been done on the joint. If percussion drilling is used, a down-hole camera shall be used to verify the hole was on the joint.

3.1.2 Installation of Grout Sock or Expansive Rope

The Contractor shall complete the installation of grout sock or expansive rope in accordance with the manufacturer's instructions or as stated herein. The sock/rope and polyurethane resin shall cover the vertical core hole completely up to the depth of 6 inches from the top concrete surface.

The grout sock/expansive rope must have the ability to contain the polyurethane resin to prevent it from being washed out from flowing water.

3.2 APPLICATION

Inject the polyurethane resin. Begin injection at the bottom of the hole using equipment and methods, which deliver and thoroughly mix the resin with water at the point of delivery. Polyurethane resin shall be placed within 6 inches of the top concrete surface. When cured the polyurethane resin expands to form a tight compressive seal, properly adhering to the concrete surface.

3.2.1 Non-Shrink Grout

As shown on the drawings, the top 6 inches of the hole shall be cleaned and filled with a non-shrink grout meeting ASTM C 1107/C 1107M, Grade C.

3.2.2 Pre-Molded Expansion Joint Filler

A pre-molded expansion joint filler for the depth of the non-shrink grout shall meet the requirements of ASTM D 1752. The joint filler shall be recessed 1/4-inch down from the top and filled with a joint sealant meeting the requirements of ASTM C 920, Type S, Class 25 and use T.

3.3 SAFETY PRECAUTIONS

All work will be performed within the guidelines set forth by EM 385-1-1

"Corps of Engineers Safety and Health Requirements Manual."

Each employee who works with the products must wear chemical goggles, face shields, NBR gloves, foul weather gear and boots.

A pressurized source of water, such as a garden type sprayer, must be provided at the work site. The water source should be used only for first aid in the event chemicals should contact an employee's skin.

A portable eye wash unit must also be provided near the work site for emergency use.

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