below-grade injection waterproofing

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CGINORTHEAST.COM BELOW-GRADE INJECTION WATERPROOFING

The CGI Waterproofing System is acost-effective and environmentallysafe solution to stopping waterinfiltration in below-gradefoundations, cellars, elevator pits,tunnels, mechanical rooms, vaultedstructures, and garages. CGI performs “concrete gelinjection” by drilling and injecting atwo-component hydrophilic resinsystem through the negative, orinterior, side of the structure usingour specialized equipment. The twoliquid components, which arewater-like in viscosity, penetratethe tiniest cracks, fissures andwater pockets to the full depth ofthe substrate and travel to thecompromised membrane above,chemically reacting to form aflexible gel barrier. CGI’smethodology is beneficial andadvantageous as a result of thegel’s properties, and, byimplementing its technology fromthe negative side of the foundation,all costly and disruptive exteriorexcavations, common withtraditional waterproofingapplications, are avoided.

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Properties•Water-like viscosity•Highly elastic and adhesive•Lab tested as non-toxic, non-flammable and non-hazardous

•Little to no odor produced duringand after reaction

•Will not promote growth of fungi,mold or bacteria

•Cleans with water requiring nocleaning solvent

•Resilient against water containingoil, salt and/or sewage

Advantages•Disruptive exterior excavationsavoided

•Implement technology duringactive leaks

•No drilling to the positive siderequired, avoiding damage toexisting waterproofingmembrane(s)

•Controlled setting time calculatedbased on active water pressureand volume

•Occupies and seals water entrypoints for the life of the structure

Benefits•Reclaim unusable space•Restore structural integrity,durability and appearance

•Reduce unhealthy and unsafetenant conditions

The CGI Waterproofing System | A Two-Part Liquid Component System

Component BWater is combined withcatalyst to enable gel

reaction.

Component AGel acryl by De Neef,

combined with accelerator,results in precise tuningbased on desired settingtime. Set time can be asquick as five seconds.

Flexible Water Sealing Geldemonstrates superiorelasticity, adhesion and

durability.

Specialized equipment is utilized to inject at a working pressure exceeding 3,200

psi to combat hydrostatic groundwater pressure.


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Active Groundwater Infiltration Through Cracks and Cold Joints

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SOIL

COMPONENT A

COMPONENT B

Concrete Wall Injection

Holes are drilled from the interior side, next to cracks/cold joints, where the two liquid components are then pressure-injected within the substrate to forma flexible water sealing gel, which eliminates water intrusion.


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SOIL

COMPONENT A

Masonry Wall Injection

Holes are drilled from the interior side, nextto cracks/cold joints, where the two liquidcomponents are then pressure-injectedwithin the substrate to form a flexible watersealing gel, which eliminates waterintrusion.

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Interior Cellar Space

CONCRETE

Urethane Sealant

Gravity Feeding of Two LiquidComponents

A and B

Backer Rod

Existing Concrete Wearing Slab

Existing Structural Slab

Vaulted Concrete Sidewalk Application

The CGI AQUA LOC Resin LV-GEL SealsCompromised Membranes and Cracks


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Interior Cellar Space

GRANITE

Urethane Sealant

Gravity Feeding of Two LiquidComponents

A and B

Backer Rod

Granite Sidewalk Slab

SOFT ROC - Similar to Mineral Wool Fiber Filler orOakum - acts as a Form Stop

Vaulted Granite Sidewalk Application

Sand Infused with CGI AQUA LOC Resin LV toOccupy Joint’s Volume to the Full Depth

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CGI Specialized Equipment | Automatic Injection Tool Utilizing Compressed Air


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CGI Specialized Equipment | Pipe Penetration Tools

CORE TO PIPE PENETRATION CONDUIT SLEEVE TO CABLE(S) PENETRATION(ANNULAR INJECTION)

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CONDUIT SLEEVE TO CABLE(S) PENETRATION (ANNULAR INJECTION)

CGI Specialized Equipment | Pipe Penetration Tools


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In the C4 Level Broadcast Tank Room, the south facing concrete foundation wallwas showing signs of active below-grade water infiltration along with signs ofprevious water staining and efflorescence. Upon review, our team found verticalfoundation wall cracks that started at the floor slab and continued upward on thewall, in addition to several locations with 3/4-inch diameter holes that were activelyleaking. As a result of the structural defects, ponding of water was found on thefloor slab on grade. The elevation of the cracks and holes were well within thegroundwater table and under tremendous hydrostatic pressure as this C4 Level wasat least 50 feet below-grade and very thick, as this structural wall was necessary tosupport the Freedom Tower above.It was very critical that these actively leaking locations were rectified so that thespecialized epoxy floor slab coating could be properly applied to a dry surface.These water entry points were successfully resolved using the CGI waterproofingsystem where our specialized pumps created the necessary pressure output of over3,000 psi for the two-component gel to penetrate full depth toward the exteriorside. Thus, the resulting gel was able to reach deep within the cracks and the holesfor a complete waterproofing seal. Consequently, the general contractor was ableto perform the application of the specialized epoxy coating effectively.

Featured Project

Address: One World Trade Center285 Fulton Street , New York, NYBuilding Type: CommercialLocation: Oil Tank RoomSubstrate: ConcreteOwner: The Durst OrganizationGeneral Contractor: Tishman Construction


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Concrete Floor Slab CracksConcrete Floor Slab Cracks

1 Northside Piers, Brooklyn, NY

®


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Concrete Floor Slab Cracks & Seams

The Uniondale Public Library400 Uniondale Avenue, Uniondale, NY

Concrete Floor Slab

| Before |

®

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NY-Presbyterian HospitalThe Helmsley Medical Tower

1320 York Avenue, New York, NY

Oil Tank Room


®

| After |

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Tunnel


| After |

| Before |

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Public School 101The Verrazano School

Brooklyn, NY

Concrete Floor Slab Cracks


®

Boiler Room

| Before injections


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®

|


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Vaulted Structural Slab Below Courtyard

Cracks

®

London Terrace Gardens435 West 23rd Street, New York, NY


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Perimeter Expansion Joints

Parking Garage Below

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The GM BuildingThe Fifth Avenue Apple Store

767 Fifth Avenue, New York, NY

Cellar | Storage and Locker Area


®


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Vaulted Masonry Structure | Below Street Grade

The Evelyn Hotel 7 East 27th Street, New York, NY

®

| Before |

111 Mercer Street, New York, NY


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Rubble Walls

®

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1185 Avenue of the Americas, New York, NY

Concrete Floor Slab Cracks


Vaulted Sidewalk | Expansion Joints Above Cellar Level

Cellar Level

Gravity Feeding Two Liquid Components

®

| After |

Silver Towers South620 West 42nd Street, New York, NY


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Elevator Pit

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| Before |

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Lincoln Center70 Lincoln Center Plaza, New York, NY

Tunnel


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| Before |

Leonidas Tsampas – Vice PresidentM: 516.790.2983

E: [email protected]

CGI NORTHEAST49-28 31st Place, Long Island City, NY 11101

CGInortheast

cgi-northeast-inc.

George Doukas – PresidentM: 917.518.1679

E: [email protected]

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CGI Northeast Inc. is an AIA CES Approved Provider

below-grade injection waterproofing

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