CENTRIFUGALLY CAST CONCRETE PIPE SPECIFICATIO.pdf

CITY OF SANDY SPRINGS 4787 RIVERVIEW ROAD PROJECT

COLUMBIA ENGINEERING CENTRIFUGALLY CAST CONCRETE PIPE SPECIFICATION

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CENTRIFUGALLY CAST CONCRETE PIPE SPECIFICATION

PART 1– GENERAL

1.1 SUMMARY

A. Work of this Section, as shown or specified, shall be in accordance with the requirements of the Contract Documents, and shall include furnishing and installation of the following centrifugally cast concrete pipe (CCCP) liner on existing storm sewer pipe structures. The CCCP liner shall extend over the specified length forming a continuous structural concrete pipe within a pipe. The installed CCCP liner shall provide an opening area equal or greater than the proposed opening area shown on the plans.

1.2 MEASUREMENT AND PAYMENT

A. Under this item, the Contractor shall install centrifugally cast concrete pipe in accordance with the plans, specifications, and directions of the Owner’s Representative.

Work shall include selection, transporting, cleaning, siting, setting, and adjusting site furnishings. CCCP liner will be measured by the linear foot, complete in place.

B. The accepted quantities of CCCP liner will be paid for at the contract unit price per linear foot for existing structure in which the liner is installed. The installed liner shall provide an opening area equal to or greater than the proposed opening area shown on the plans. Price shall include all accessories, including fixtures, fastenings, and machinery required for installation.

C. The cost of repairing jagged edges or deformities to the existing structure, filling cavities around the existing structure with pea gravel, flowable backfill, grout, or invert repair mortar, rights of entry, maintenance and removal of temporary fence, removing debris and foreign material from the existing structure, cleaning the existing structure, preparation of a work plan, providing design calculations, presence of the manufacturer’s representative, testing, corrective actions and all other incidentals shall be included in the cost of the CCCP liner.

D. There will be no payment for the installation or removal of any liner that cannot be successfully installed due to the condition of the existing structure.

E. If the existing structure or other objects not designated for removal are damaged while performing the work, it shall be considered unauthorized work and repaired or replaced.

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1.3 SUBMITTALS

A. All submittals shall conform to the requirements in this and other sections of the Contract Documents. The following minimum shall be required:

B. Reference Submittals

1. Lining System’s “Applicator Certification” along with minimum three years’ experience of qualified Technical Representative on site for the duration of the project.

2. Third-party references of qualified installation experience in pipeline structures.

C. Product and Materials

1. Provide manufacturer’s data for all furnishings listed in this section including;

a. Repair mortar material including technical data sheet.

b. Lining material including technical data sheet and third-party testing completed.

2. Provide supporting documentation from the manufacturer to validate all claims of recycled content and regional materials.

D. Maintenance Data Samples: Provide manufacturer's recommended maintenance instructions with address and phone number of source of supply.

E. Warranty: Submit manufacturer warranty and ensure that forms have been completed in Owner's name and registered with manufacturer.

1.4 QUALITY ASSURANCE, CONTROL AND ACCEPTANCE

A. Installer Qualifications: Firm with at least three years of successful installation experience on projects with furnishing work similar to that required for this project.

B. Manufacturer's Qualifications: Firms regularly engaged in the manufacture of furnishing types and sizes required, whose products have been in satisfactory use in similar service for not less than five years.

C. The Contractor shall have a manufacturer’s representative at the site during the mixing and application of the pipe lining material.

D. The Contractor shall measure the new span and rise per every 5 ft of structure length and shall provide these measurements along with the pre-installation measurements to the Engineer. Acceptance will be based on verification that the thickness of the installed CCCP liner is in accordance with the plans by comparison of the pre-installation and post-installation span and rise measurements along with a visual inspection to verify a leak-free, uniform appearance. A plan of corrective action shall be submitted

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for approval upon notification from the Engineer of any unacceptable areas of the CCCP liner.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver, handle, and store equipment to project site in accordance with manufacturer's recommendations.

1. Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly identifying product name and manufacturer.

2. Storage: Store materials in clean, dry area elevated above grade in accordance with manufacturer’s instructions. Keep materials in manufacturer’s original, unopened containers, and packaging until installation.

3. Handling: Protect materials and finish during handling and installation to prevent damage.

1.6 WARRANTY

A. Unless otherwise noted, products will be free from defects in material and/or workmanship for a period of three years from the date of invoice.

B. The warranty does not apply to damage resulting from accident, alteration, misuse, tampering, negligence, or abuse.

C. Warrantor shall, at its option, repair, replace, or refund the purchase price of any items found defective upon inspection by an authorized service representative.

D. Scratches, nicks, and dents are to be considered normal wear and tear and are not the responsibility of the manufacturer.

PART 2– PRODUCTS AND MATERIALS

2.1 MATERIALS

A. Materials shall be in accordance with the following:

Properties Test Method Duration Requirements

Compressive Strength ASTM C 39 or C 109 1 Day

28 Day 2,500 psi 8,000 psi

Flexural Strength ASTM C 78 7 Day

28 Day 1,100 psi 1,500 psi

Tensile Strength ASTM C 496 28 Day 800 psi

Shrinkage RH ASTM C 1090 28 Day 0% at 65%

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Modulus of Elasticity ASTM C 469 1 Day

28 Day 3,000,000 psi 5,800,000 psi

Bond Strength ASTM C 882 Type II 1 Day

28 Day 900 psi

2,500 psi

Freeze Thaw Durability ASTM C 666 300 Cycles Zero Loss

Set Time ASTM C 807 Initial Final Less Than 75 min.

Less Than 120 min.

Abrasion Resistance ASTM C 1138 5 Cyl.28 Day Less Than 3% Loss

B. The CCCP liner geopolymer mortar shall be composed of at least 70% Pozzolanic material consisting of SiO2, MgO, Al2O3, or Fe2O3 and shall be verified by third party certified X-ray Fluorescence, XRF, testing.

C. The maximum aggregate particle size shall consist of 100% of material, excluding fibers, passing the No.8 (2.36 mm) sieve.

D. Additional materials including chemical grouts and hydraulic cements necessary to stop infiltration and create a surface for the geopolymer lining to be applied to may be necessary and shall be in accordance with GDOT standards.

E. All materials used shall be compatible with the geopolymer lining and are subject to approval.

F. A type C certification in accordance with 916 shall be provided for geopolymer mortars.

The applicable specifications shall be referred to in the certifications.

PART 3- EXECUTION

3.1 LAYING OUT THE WORK

A. Mark the location of all centrifugally cast concrete pipe elements, including adjacent hard surfaces, walls, fences, and structures.

B. Mark the layout before starting any work.

1. If conflicts or obstructions exist, notify the Owner’s Representative.

2. Do not proceed until revised drawings have been provided, showing corrected layout, and obstructions have been removed.

3.2 EXAMINATION

A. Before beginning installation, verify that the site is ready for installation in accordance

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with manufacturer’s installation instructions, and that surface elevations have been confirmed and that finished grade will be achieved when surfacing is in place.

B. Verify items provided by other sections of work are properly sized and located, and that built-in items are in proper location. A temporary fence shall be installed as required to prevent encroachment of the public or livestock into the work area. Upon completion of the work, disturbed areas on private property shall be restored.

C. If conditions are the responsibility of another installer, notify Owner’s Representative of unsatisfactory preparation before proceeding.

D. Any installation damage to location facilities will be repaired at Contractor's expense.

3.3 PRE-INSTALLATION

A. Before beginning the installation operation, three copies of a work plan that includes design calculations shall be submitted to the Engineer. The design calculations shall be signed and sealed by a professional engineer and shall certify the proposed CCCP liner thickness. The work plan shall also include:

1. The location and characteristics of cavities around the existing structure.

2. The anticipated coverage area and volume of invert repair mortar needed per existing structure.

3. If used, the identification, location and quantity of additional materials, such as pea gravel or flowable backfill that will be used for filling cavities.

4. The location of any deformities such as jagged edges that might impact the liner installation or its function, and plan to correct the conditions.

5. A log of the existing span and rise for every 5 ft of existing structure length. The thickness of the installed liner shall be verified by a comparison of the post construction span and rise dimensions.

3.4 OBSTRUCTION REMOVAL

A. The Contractor shall clear the existing structure of all obstructions such as but not limited to solids, dropped joints, roots, protruding laterals, or collapsed pipes that will prevent CCCP liner installation. All other foreign materials shall be removed from the existing structure and disposed of in accordance with GDOT Standards. Headwalls and taps shall be cut back to be flush with the existing structure. If inspection reveals an obstruction that cannot be removed by conventional sewer cleaning equipment, the Contractor may make a point repair excavation to remove or repair the obstruction.

B. Areas of water seepage shall be sealed off by an approved method. Pools of water shall

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be removed; however, a dry surface is not required.

C. Prior to lining, all drop inlets or taps shall be temporarily plugged to prevent water discharge onto newly placed mortar and to prevent mortar from entering the inlet or tap. Lines with active flow shall be temporarily plugged with a device that sufficiently prevents water from discharging onto the newly placed CCCP liner.

D. The interior surface of the existing structure shall be cleaned with a high-pressure water-blast sufficient to remove all laitance and loose material and flush debris from the structure. Upon final inspection the existing structure shall be free of sand, dirt and all other laitance that may impede the placement or adhesion of the CCCP liner to the structure.

3.5 INSTALLATION

A. The Contractor shall carry out operations in strict accordance with all applicable OSHA standards. Particular attention is drawn to those safety requirements involving entering confined spaces.

B. Drainage shall be maintained during the installation and during operations in a manner that does not damage adjacent property. The Contractor shall provide for the diversion of flow around the existing structure where the CCCP liner is being installed. Pump and bypass lines shall be of adequate capacity to handle the flow.

C. Maintenance of traffic shall be in accordance with the Plans and GDOT standards.

D. The existing structure surface shall be saturated surface-dry before application begins.

The CCCP liner shall be installed by using a high speed, rotating applicator device as recommended by the manufacturer of the mortar. Mortar mixers, compressors and pumps shall also be of a type recommended by the mortar manufacturer. The mortar shall be mixed and agitated according to the mortar manufacturer’s instructions. If recommended by the mortar manufacturer, working time may be extended by mixing the material with cool water or ice-cooled water.

E. The mortar shall not be applied when ambient or existing structure surface temperatures are 100°F or above or when ambient temperatures are expected to fall below 45°F within 72 hours of placement. Both ambient and existing structure surface temperatures shall be at least 45°F at the time of placement. The CCCP liner shall be protected from freezing.

F. A curing compound in accordance with ASTM C 309 shall be used. It shall be applied at the time and rate recommended by the mortar manufacturer.

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END OF SECTION