07160_Manhole_Sealing.doc

07160 – Manhole Sealing

PART 1 - GENERAL

1.1 - Description This section specifies furnishing and installation of a coating system to seal the walls of existing Sanitary Sewer Manholes.

1.2 - Approved Manufacturer and/or Installer This specification is based on a designated product and installer. Equivalent products and installers will be acceptable subject to conformity with the salient features of those specified.

(a) Specified Products: The Contractor will submit to the Contracting Officer for approval: Manufacturers product data specifying compliance with the salient characteristics as provided in this section. Work on this item will not commence until the Contracting Officer has approved these submittals.

(b) Alternate Products: If the Contractor chooses to install an alternate product to those specified herein, the following will be submitted to the Contracting Officer for approval: Manufacturers product data specifying compliance with the salient characteristics as provided in this section. Work on this item will not commence until the CO has approved these submittals.

1.3 - Measurement and Payment

No separate measurement and payment will be made for the work of this Section.

This work will be considered incidental to Section.

PART 2 - PRODUCTS

2.1 – Water Proof Mortar Coating Material

SikaTop Seal 107® is a two-component, polymer-modified, cementious waterproofing and protective slurry mortar for concrete. It is slightly flexible to tolerate fire cracks and suitble in both interior and exterior applications. A minimum of two (2) coats will need to be applyed per manufacturer’s specifications to ensure waterprooffing is achived. Color will be “Grey”.

2.2 - Physical Properties Tensile strength

990 psi

Bond Strength

180 psi

Watertightness under hydrostatic pressure (DIN 1048 mod.)

VOC content

None

Toxicity

None

2.3 – Top Coating Sealant

SikaGard 62© is a 2-component, 100% solids, moisture-tolerant epoxy resin. It produces a high-build, protective, dampproofing and waterproofing vapor-barrier system. Sealant will be applied as a top coat for the SikaTop Seal 107©. Contractor will allow the sealant to cure per manufactureers recomendations.

2.4 - Physical Properties Tensile strength

5,400 psi

Elongation at Break

2.7%

Abrasion Resitance

51 liters/mil.

Adhesion Classification

4A

Water Absorbtion

0.1%

VOC content

None when set

Toxicity

None when set

Color will be “Grey”.

PART 3 - EXECUTION

3.1 - Application

The Contractor will clean the side of the Sanitary Sewer Manholes of all loose mortar, dust, concrete, efflorescence, etc. prior to application of waterproof mortar.

SikaTop Seal 107© will be spray applied to the manhole walls. Application thickness will be a minimum of 40 mils per coat with a minimum of two (2) coats. Theoretical thickness on smooth substrate: 400 sq. ft/gal. = 40 mils.

SikaTop Seal 107© will be applied by an experienced installer with correct equipment as recommended by the material manufacturer.

Once SikaTop Seal 107© has cured properly Contractor will apply SikaGard 62© to the tank interior floor and walls. Application will be a minimum of two (2) coats.

3.2 - Safety The contrctor will apply all Sika® materials according the manufacturer’s safety requirments including any required resperator use.

***END OF SPECIFICATION 07160***

07900 - Caulking and Sealants

PART 1 - GENERAL

1.1 - Scope Work Included: Perform all work necessary and required for construction of the project as indicated. Such work includes but is not limited to the following:

(1) Sealants

(2) Caulking

1.2 - Related Work Specified Elsewhere 07160 – Manhole Sealing

1.3 - Product Handling Delivery: Deliver sealants and related accessories to the job site in factory sealed, unopened containers bearing manufacturer's name and product designations.

Handling: Follow manufacturer's recommendations for handling products containing toxic materials. Keep flammable material away from heat, sparks, and open flame.

1.4 - Measurement and Payment

No separate measurement and payment will be made for the work of this Section.

This work will be considered incidental to Section.

PART 2 - PRODUCTS

2.1 - Materials General: All sealants, primers, and accessories will be non-staining to adjacent exposed materials. Use gun consistency compounds unless otherwise required by job conditions. Colors willl be approved by the Contracting Officer.

Silicone Sealant: Use Dow Corning #790 or General Electric "SILPRUF" sealants, or approved equal.

Use General Electric "2400" silglaze or Dow Corning #732 for all other non-concrete sealant, or approved equal.

PART 3 - EXECUTION

3.1 - Condition of Surfaces Inspect all surfaces to receive sealant material. Starting work implies acceptance of surfaces as satisfactory by Contracting Officer.

Verify that joints and spaces to be sealed are of proper width.

Apply no sealant materials in contact with surfaces contaminated with oil, grease, bituminous materials, form release agents, bond breakers, deleterious curing compounds, water repellents, and other special surface treatments.

3.2 - Preparation Thoroughly clean all joints, removing all foreign matter such as dirt, dust, moisture, frost, rust, mill scale, paint, lacquer, and protective coatings. Blow all joints free of loose particles.

Use no cleaning solvents which leave residue. Wipe joints free of solvent using clean, dry white cloths or white lintless paper. Do not permit solvent to air dry.

Follow manufacturer's directions for products and surfaces.

3.3 - Installation Unless otherwise required by these specifications, install materials in strict accordance with manufacturer's specifications and recommendations using approved equipment.

3.4 - Patching Patch or replace defective or damaged sealants as directed by the Contracting Officer. The Contractor will be responsible for damage to adjacent surfaces caused by sealant operations.

3.5 - Cleaning Clean adjacent surfaces soiled by sealing operations. Remove wet material before it "sets". Follow manufacturer's recommendations for cleaning procedures. Cleaning agents will not stain or be injurious to exposed surfaces nor will they be potentially dangerous to metal surfaces due to wash-off by rain.

***END OF SPECIFICATION 07900***

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