A04_Construction_Specifications_Vol__2.pdf

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TABLE OF CONTENTS

TABLE OF CONTENTS

DIVISION, SECTION & PARAGRAPH NUMBERING

Numbering and lettering of sections and paragraphs in this Project Manual are merely for identification.

Sections included are listed in this Table of Contents together with the number of pages in each section.

The Contractor shall check their copies of the Project Manual against this Table of Contents and confirm there are no missing pages or sections.

Number Title No. of Pages

00 01 10 Table of Contents

DIVISION 02 – EXISTING CONDITIONS

02 05 00 General Site Construction Requirements

02 41 00 Demolition & Abandonment

02 41 13.13 Pavement Removal

02 41 19 Selective Demolition

DIVISION 03 – CONCRETE

03 11 13 Cast-In-Place Concrete Forms

03 30 00 Cast-In-Place Concrete, Reinforcing, & Formwork

03 60 00 Grouting

DIVISION 04 – MASONRY (Section not used)

DIVISION 05 – METALS (Section not used)

DIVISION 06 – WOOD, PLASTICS, & COMPONENTS

06 05 23 Miscellaneous Materials

DIVISION 07 – THERMAL & MOISTURE PROTECTION

07 92 00 Sealants & Caulking

DIVISION 08 – OPENINGS (Section not used)

DIVISION 09 – FINISHES

09 90 00 General Painting & Coating Requirements

09 97 13 Exterior Painted Iron & Steel

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DIVISION 10 – SPECIALTIES (Section not used)

DIVISION 11 – EQUIPMENT (Section not used)

DIVISION 12 – FURNISHINGS (Section not used)

DIVISION 13 – SPECIAL CONSTRUCTION (Section not used)

DIVISION 14 – CONVEYING EQUIPMENT (Section not used)

DIVISION 21 – FIRE SUPPRESSION (Section not used)

DIVISION 22 – PLUMBING (Section not used)

DIVISION 23 – HEATING, VENTILATING, & AIR CONDITIONING (HVAC) (Section not used)

DIVISION 25 – INTEGRATED AUTOMATION (Section not used)

DIVISION 26 – ELECTRICAL (Section not used)

DIVISION 27 – COMMUNICATIONS (Section not used)

DIVISION 28 – ELECTRONIC SAFETY & SECURITY (Section not used)

DIVISION 31 – EARTHWORK

31 10 00 Site Clearing

31 22 19 Finish Grading

31 23 17 Watering

31 23 23.33 Flowable Fill

31 23 33 Trenching & Backfilling for Piping Systems

31 23 33.20 Restoration of Surfaces

31 25 00 Erosion & Sediment Control

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 12 16 Pavement Remove & Replace (with Attachment A)

32 13 13.06 Portland Cement Concrete

32 15 00 Aggregate Surface

32 16 13.13 Cast-in-Place Concrete Curbs & Gutters

32 17 23 Pavement Markings

32 90 00 Landscaping

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DIVISION 33 – UTILITIES

33 00 00 Pipe & Pipe Fittings – General Statement

33 01 12 Cleaning & Testing of Main

33 05 00 Common Work Result for Utilities

33 05 07.13 Horizontal Directional Drilling

33 05 26.16 Utility Line Identification Marking

33 05 81 Castings

33 11 00 Water Piping & Appurtenances

33 12 00 Valves General Statement

33 12 16 Water Utility Distribution Valves Reduced Pressure

Principle Assembly & Water Meters

33 13 00 Chlorination of Whole System Water Mains for Disinfection

33 14 00 Valves General

33 14 19 Fire Hydrants

33 14 19.01 Gate Valves

33 31 00 Piping & Fittings

DIVISION 34 – TRANSPORTATION (Section not used)

DIVISION 35 – WATERWAY & MARINE CONSTRUCTION (Section not used)

DIVISION 40 – PROCESS INTERCONNECTIONS

40 05 00 Miscellaneous Valves

40 05 76 Tapping Sleeves & Tapping Valves

DIVISION 41 – MATERIAL PROCESSING & HANDLING EQUIPMENT (Section not used)

DIVISION 42 – PROCESS HEATING, COOLING, & DRYING EQUIPMENT (Section not used)

DIVISION 43 – PROCESS GAS AND LIQUID HANDLING, PURIFICATION, & STORAGE

EQUIPMENT (Section not used)

DIVISION 44 – POLLUTION CONTROL EQUIPMENT (Section not used)

DIVISION 45 – INDUSTRY – SPECIFIC MANUFACTURING EQUIPMENT (Section not used)

DIVISION 46 – WATER AND WASTEWATER EQUIPMENT (Section not used)

DIVISION 48 – ELECTRICAL POWER GENERATION (Section not used)

DIVISION 02

EXISTING CONDITIONS

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GENERAL SITE CONSTRUCTION REQUIREMENTS

SECTION 02 05 00

PART 1 - GENERAL

1.1 DESCRIPTION

A. The work of this Section includes the general procedures and requirements for Site Work.

B. The period of construction on site is restricted to the following months:

1. Beginning June 1st through October 15th.

PART 2 - PRODUCTS - NOT USED.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Site Verification of Conditions

1. Contractor shall perform necessary potholing or locating of underground utilities and services. Perform minor, investigative excavations to verify location of various existing underground facilities at sufficient locations to assure that no conflict with the proposed work exists and sufficient clearance is available to avoid damage to existing facilities.

2. Upon discovery of conflicts or problems with existing facilities or construction documents, notify Contracting Officer (CO) within twenty-four (24) hours.

3. Existing mapping may be used to approximate locations of existing utilities. Contractor is responsible for determining actual locations of all utilities.

3.2 PREPARATION

A. Protection

1. Spillage:

a. Avoid spillage by covering and securing loads when hauling on or adjacent to public streets or highways.

b. Remove spillage and sweep, wash, or otherwise clean project, streets, and highways.

2. Existing Plants and Features: Do not damage tops, trunks, and roots of existing trees and shrubs on site which are intended to remain. Do not use heavy equipment within branch spread. Interfering branches may be removed only with permission of Contracting

Officer. Do not damage other plants and features which are to remain.

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3. Open Excavation: Contractor shall supply and install steel plates to cover open trenches and excavation to allow for both vehicular and pedestrian traffic access to all NPS buildings. Contractor to coordinate with the CO for project phasing that will determine the sequence of construction and areas to be protected and available for access.

3.3 REPAIR / RESTORATION - NOT USED.

3.4 FIELD QUALITY CONTROL

A. Notify CO forty-eight (48) hours before performing excavation or fill work. Contractor shall coordinate with NPS staff prior to backfill of all excavation to allow NPS staff inspection of installation of any and all waterline improvements.

B. Shutdowns and service interruptions of the existing water distribution system shall be minimized to the extent practical and shall follow specification requirements. Contracting officer shall be notified prior to shutdowns and service interruptions 72 hours in advance.

Closures and shutdowns shall not be allowed on Fridays, Saturdays, Sundays, and holidays.

C. Phasing and staging see conceptual plan sheets. Contractor's phasing may vary due to means and methods, however, the intent is to keep all facilities operational with the least amount of interruption at any one time.

D. If work has been interrupted by weather, scheduling, or other reason, notify Contracting Officer twenty-four (24) hours minimum prior to intended resumption of grading or compacting.

E. NPS reserves the right to require additional testing to re-affirm suitability of completed work including compacted soils that have been exposed to adverse weather conditions.

END OF SECTION

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DEMOLITION & ABANDONMENT

SECTION 02 41 00

A. The work of this Section includes all demolition, removal, salvage, and disposal of existing structures, piping, pavement, and other miscellaneous materials.

1.2 SUBMITTALS

A. As specified in Division 01 Section 01 33 23 “Submittal Procedures, Part 1.3”.

B. Certifications and Testing consistent with Division 01 Section 01 40 00 “Quality

Requirements” and including:

1. Permit for transport and disposal of debris.

2. Proposed method of demolition, proposed schedule, sequence of work, and proposed method and schedule for removing, maintaining, and re-establishing facilities and utilities prior to scheduling the preconstruction meeting.

1.3 SITE CONDITIONS

A. Protection

1. Erect barriers, fences, guardrails, enclosures, chutes, and shoring around all construction activities to protect personnel, structures, and utilities remaining intact.

2. Install steel plates over trenches and open excavation to allow vehicle and pedestrian access to NPS buildings.

3. Protect designated trees and plants from damage.

B. Maintaining Traffic

1. Assure minimum interference with roads, streets, driveways, sidewalks, and adjacent facilities.

C. Utility Lines and Services

1. Keep existing structures to remain and adjacent structures intact and in operation.

2. Obtain permission to disrupt any utilities or services temporarily or permanently.

3. Coordinate with utility company for disconnecting existing service on structures to be demolished.

4. Coordinate with Park for services to be disconnected and schedule with utility company.

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5. Contracting officer shall be notified prior to shutdowns and service interruptions 72 hours, three (3) days in advance. Closures and shutdowns shall not be allowed on Fridays, Saturdays, Sundays, and holidays.

6. Schedule and coordinate with Park and utility company far enough in advance so as to not delay work.

D. Prior to demolishing a utility or facility, notify the Contracting Officer three (3) days in advance, and plan the demolition such that the demolition will not create an unsafe condition or interfere with ongoing operations.

E. Where demolition must occur in such a sequence that a portion of this facility must remain operational, coordinate this aspect with the Contracting Officer.

F. Do not burn waste material. All organic material removed from the construction area must be properly chipped and recycled or removed from the Park and properly disposed.

G. Provide adequate fire protection. Keep area clear of hazardous substances and debris.

H. Maintain access to exits at all times.

I. Separate demolition area from building to remain with temporary dustproof partitions.

J. Provide temporary weather protection to prevent damage to structure and interior area.

K. Explosives are not permitted.

PART 2 - PRODUCTS

2.1 BACKFILL MATERIALS

A. Native soils, stone, gravel, or sand, free from debris, frozen materials, roots, and other organic matter may be used for backfill of demolition areas that are not designated for new construction.

Pieces of concrete and masonry smaller than one (1) square foot and suitably shaped for compaction may be used in backfill more than one (1) foot below finished grade.

B. See Section 31 23 00 – Excavation and Fill for Construction Requirements.

A. Verify that areas to be demolished are unoccupied and discontinued in use.

B. Do not commence work until conditions are acceptable to Contracting Officer

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A. Arrange for and verify termination of utility services to include capping lines.

B. Remove items scheduled to be salvaged and place in the designated storage area.

3.3 DEMOLITION/ABANDONMENT

A. All debris from demolition and abandonment shall be removed from the Park and disposed of in a legal manner. Any material which the Contracting Officer may wish to save, or reuse, shall be stored per the Contracting Officer’s direction.

B. General

1. Dampen debris and use temporary enclosures as necessary to control dust.

2. Do not use water to the extent it causes flooding, or contaminated runoff.

3. Break concrete and masonry into sections less than three (3) feet in any dimension and dispose of off-site.

4. Repair damage to adjacent structures.

5. Make neat saw cuts around areas of concrete to be removed, where remaining concrete is to be incorporated into new work.

6. Remove existing exposed piping to the extent shown on the Drawings.

7. Remove buried piping to the extent shown on the Drawings.

8. All equipment to be removed or replaced shall be done so in a safe manner and such that the equipment and any associated piping or wiring are not damaged.

9. All debris from demolition and abandonment shall be removed from the Park and disposed of in a legal manner. Any material which the Contracting Officer may wish to salvage shall be cleaned and stored per the Contracting Officer’s direction and requirements of this specification.

3.4 HAZARDOUS MATERIALS

A. If suspected hazardous materials are encountered during demolition of existing facilities, all work is to be stopped immediately and the Contracting Officer is to be immediately notified.

3.5 DISPOSAL

A. Place demolition debris in debris boxes onsite for weekly removal.

B. Dispose of unsuitable and excess material off-site. Contractor shall recycle all recyclable demolished materials. Contractor shall submit names and contact information for proposed recyclers to the Contracting Officer prior to beginning demolition. Only materials not suitable for recycling shall be disposed of in a landfill.

C. Disposal of demolition material shall be in accordance with all EPA, OSHA, and Florida requirements for materials disposal.

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3.6 SALVAGE

A. Carefully remove items to be salvaged and delivered to Contracting Officer’s storage.

1. Store and protect items indicated to be salvaged.

2. Replace any items damaged through carelessness in removal, storage, or handling with new items of same type.

3. Do not reuse materials or equipment not specifically indicated or specified to be reused.

B. Preparation of Equipment for Storage

1. Identify each component with markings or tags to show its position in the assembly and the assembly of which it belongs.

2. Place small parts in wooden boxes and clearly mark contents on the outside.

3. Thoroughly clean and dry equipment.

4. Coat unpainted surfaces with two (2) coats of rust-preventive compound.

5. Attach unit to suitable crate bottom.

6. Enclose unit in polyethylene film and seal all seams and the film to the base of the unit with tape.

7. Construct a crate of wooden slats around top and sides of unit.

8. Attach permanent instruction tag to outside of crate stating, “This unit has been prepared for storage.”

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PAVEMENT REMOVAL

SECTION 02 41 13.13

PAVEMENT REMOVAL

1.1 SUMMARY

A. This section includes the work necessary for the removal of pavement.

PART 2- -PRODUCTS (Not Applicable)

3.1 PAVEMENT REMOVAL

A. The Contractor shall refer to General Site Construction Requirements as specified regarding possible conflicts with underground utilities and services.

B. Pavement shall be removed to an existing joint or to a sawed joint. An existing crack is not suitable for the limit of removal. Sawed joints for pavement removal are to be either parallel or perpendicular to the longitudinal centerline of waterline piping. Sawed joints shall extend substantially through the full thickness of the pavement so that a "clean break" is made and that the adjacent pavement or structures that are to remain are not damaged.

C. At locations where new full-depth pavement will meet existing pavement a second, less deep, sawcut shall be made two (2) feet beyond the indicated sawcut so that this area can be milled, and tack coated. The new wearing course shall extend to this second sawcut.

D. The Contractor shall not damage pavement or structures as a result of the Contractor's removal operations.

E. Broken concrete, bituminous, brick, and other debris resulting from pavement removal operations shall be disposed of according to the Contractor’s Waste Management Plan.

F. Where pavements are encountered that are composed of more than one material or multiple courses of the same material. The pavement shall be removed in its entirety and all components shall be considered part of the same pavement area.

G. The Contractor shall provide sufficient barricades and fences to protect pedestrians and vehicles from hazardous areas.

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SELECTIVE DEMOLITION

SECTION 02 41 19

A. The work of this section consists of removal and disposal of existing, water line piping, valves and associated appurtenances of the site water line system, and the selective demolition and removal of asphalt paving and Portland cement concrete.

1.2 RELATED WORK

A. Section 01 11 00 – Summary of Work

B. Section 31 23 33 - Trench & Backfill Piping Systems Mdade

1.3 SUBMITTALS

A. As specified in Section 01 33 23 Submittal Procedures, Part 1.3

B. Submit a schedule showing sequence of work and methods of demolition and relocation.

Include a schedule for isolating, shutting off, capping utilities, and re-establishing utility services.

1.4 QUALITY ASSURANCE

A. Comply with safety requirements for demolition, ANSI A10 Series.

1.5 PROJECT CONDITIONS

A. Take all necessary measures to control dust during demolition.

B. Ensure the safety of persons in the demolition area. Provide temporary barricades as required.

C. Provide adequate fire protection. Coordinate with Contracting Officer to ensure NPS

Authority Having Jurisdiction over fire safety requirements are met. Keep the area clear of hazardous substances and debris.

D. Hazardous Materials: Hazardous materials may be present in buildings and structures, such as solvents, oils, and greases. Demolition shall be conducted per the Contracting Officer's direction.

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E. Storage or sale of removed items or materials on-site is not permitted.

F. Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

1.6 SCHEDULING

A. Complete demolition that might damage new construction before starting new work.

PART 2 - PRODUCTS - NOT USED.

A. Verify that utilities have been disconnected, isolated, and capped before starting selective demolition operations.

B. Contracting Officer does not guarantee that existing conditions are the same as those indicated in record documents.

C. Survey existing conditions and correlate with requirements indicated to determine the extent of selective demolition required.

A. Provide temporary support and protection for a portion of the structure to remain. Protect fixtures and equipment to remain. Protect nearby structures and vegetation, as necessary.

B. The contractor shall saw-cut the edges of all pavements, walkways, gutters, and concrete curb sections that are to be removed. The saw cut line shall be straight and smooth to allow for a clean line of repair.

C. Water and wastewater lines (including stormwater) abandoned in place shall be capped.

D. Cap or disconnect utilities. Provide bypass connections as necessary to maintain utility service to occupied areas. Abandon utilities in place that are no longer required in areas not disturbed by construction.

E. Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

F. Provide protection to ensure the safe passage of people around the selective demolition area and to and from occupied portions of the building.

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G. Provide temporary weather protection, during the interval between selective demolition of existing construction on exterior surfaces and new construction, to prevent water leakage and damage to the structure and interior areas.

H. Provide and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

3.3 DEMOLITION

A. Concrete shall be demolished in small sections. Using a power-driven saw, cut concrete to a depth of at least 3/4 inch at junctures with construction to remain. Dislodge concrete from reinforcement at the perimeter of areas being demolished, cut reinforcement, and then remove the remainder of concrete.

3.4 SALVAGE

A. Carefully clean and store items to be salvaged or reused.

B. Storage Area: As directed by the Contracting Officer.

3.5 DISPOSAL OF DEMOLISHED MATERIALS

A. Except for items and materials indicated to be salvaged, remove all demolished materials from the project site.

B. Do not allow demolished materials to accumulate on-site.

C. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

3.6 RESTORATION AND CLEAN-UP

A. Repair and clean adjacent surfaces damaged or soiled by demolition work.

B. Restore utility service to normal operation.

C. Remove equipment, temporary protection and barriers, and debris. Dispose of unsalvageable material as specified in Division 1, Part 3.12 Construction and Demolition Waste

Management and Disposal.

DIVISION 03

CONCRETE

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CAST-IN-PLACE CONCRETE FORMS

SECTION 03 11 13

A. The work of this Section consists of furnishing and installing required formwork ready for placing of concrete. This includes the design, construction, safety, removal, and disposal of the formwork.

1.1 RELATED WORK

A. Section 03 30 00 - Cast-in-Place Concrete, Reinforcing, & Formwork

1.2 REFERENCES

A. American Society for Testing And Materials

1. ASTM D 1751-97, 'Standard Specification for Preformed Expansion Joint Filler for

Concrete Paving and Structural Construction (Non-extruding and Resilient Bituminous

Types)'.

A. Quality Assurance/Control - Manufacturer's application instructions for form release agent.

B. Shop Drawings and Engineering Data shall be submitted in accordance with the requirements of Division 01 Section 01 33 23 Part 1.3 “Submittal Procedures”.

PART 2 - PRODUCTS

2.1 COMPONENTS

A. Forms - wood, metal, or plastic as arranged by Contractor. Forming material shall be compatible with specified form release agents and with finish requirements for concrete to be left exposed or to receive decorative finish.

B. Expansion / Contraction Joints

1. Asphalt Impregnated Fiber:

a. Manufactured commercial fiber type meeting requirements of ASTM D 1751 and one half (1/2) inch thick.

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b. Acceptable Products and Manufacturers:

1) Conflex by Masonite Building & Industrial Products Group, Chicago, IL

2) Sealtight by W R Meadows Inc, Elgin, IL

3) Equal as approved by Contracting Officer before installation. See Division

01 Section 01 33 23 “Submittal Procedures”.

3.1 INSTALLATION

A. Forms

1. Assemble forms so forms are sufficiently tight to prevent leakage.

2. Properly brace and tie forms.

3. Make proper form adjustments before, during, and after concreting.

4. Use new forms, or used forms that have been cleaned of loose concrete and other debris from previous concreting and repaired to proper condition. Provide smooth liner on forms used for concrete to be exposed if necessary to attain specified finish quality.

5. Use metal cold joint forms when unable to place concrete for footings, foundations, and slabs in continuous pours.

B. Accessories

1. Provide for installation of inserts, templates, fastening devices, and other accessories to be set in concrete prior to placing.

2. Position anchor bolts for hold-down anchors and columns and securely tie in place prior to placing concrete.

C. Expansion Joints: Install at joints between floor slab and foundation wall, where shown on

Drawings.

D. Form Removal: Removal of forms can usually be accomplished in twelve (12) to twenty-four (24) hours. If temperature is below fifty (50) deg F or if concrete (stairs, beams, etc.)

depends on forms for structural support, leave forms intact for sufficient period for concrete to reach adequate strength.

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CAST-IN-PLACE CONCRETE,

REINFORCING, & FORMWORK

SECTION 03 30 00

CAST-IN-PLACE CONCRETE, REINFORCING, & FORMWORK

PART 1 – GENERAL

A. Work included: Provide all labor, materials, equipment, fabrication, incidentals, transportation, placing and supervision necessary to complete all cast-in-place concrete work, its finishing, and all related work called for by the Contract Drawings and/or Specifications, or reasonably inferable from either or both, as needed for a complete and proper installation.

B. Concrete exposed to salt or brackish water, or if exposed to injurious concentrations of sulfate-containing solutions (1500 ppm or more of Sulfate in water) or other chemically aggressive solutions, Contractor shall use Type II cement with Rheobuild 1000 admixture by Master

Builders, or approved equal; water/cementitious ratio shall not exceed 0.34.

C. Related work: Work affecting this Section includes, but is not limited to:

1. Shop Drawings-Per General Conditions and as specified herein.

2. Materials and storage thereof.

3. Reinforcing-Bar and fabric.

4. Accessories of every nature, including form tie system.

5. Formwork and removal thereof, including shoring and reshoring.

6. Concrete proportions and mixes.

7. Placing of concrete.

8. Admixtures.

9. Joints, metal joint screeds and joint fillers.

10. Finishes of all types.

11. Protection and curing.

12. Patching.

13. Laboratory Testing.

1.2 SUBMITTALS

A. As specified in Division 01 Section 01 33 23, Part 1.3 “Submittal Procedures.”

a. Product cut sheet, Rheobuild 1000 admixture by Master Builders, or approved equal

1.3 QUALITY ASSURANCE

A. Unless otherwise indicated, all materials, workmanship and practices shall conform to the requirements of ACI 301-96 "Specifications for Structural Concrete for Buildings", except as modified by supplemental requirements hereinafter.

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B. Quality Assurance/Control

1. Concrete mix design.

2. Delivery Tickets: Require mix plant to furnish delivery tickets for each batch of concrete. Keep delivery tickets at job-site for use by Owner or his representatives.

Tickets shall show the following:

a. Name of ready-mix batch plant

b. Serial number of ticket

c. Date and truck number

d. Name of Contractor

e. Name and location of Project

f. Specific class or designation of concrete in conformance with that employed in

Project specification

g. Amount of concrete

h. Time loaded

i. Type, name, and amount of admixtures used

j. Amount and type of cement

k. Total water content

l. Sizes and weights of sand and aggregate

1.4 STANDARDS

A. ACI 301-96 Specifications for Structural Concrete.

B. ACI 318-95 Building Code Requirements for Reinforced Concrete.

C. Florida Building Code, latest edition.

D. ACI 117-90 Standard Specifications for Tolerances for Concrete Construction and Materials.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Materials for Concrete:

1. Cement shall conform to the following: Portland Cement ASTM C150, normal, type I or type II. Provide domestic cement of one type and from same source for entire project.

2. Mineral Admixtures:

a. Fly Ash: Shall conform to ASTM C 618. 20% maximum of total cementitious weight.

b. Ground Blast Furnace Slag: Shall conform to ASTM C 989-93. 30% maximum of total cementitious weight.

3. Chemical Admixtures: The following admixtures are permitted, but require written approval from the Contracting Officer:

a. Air Entraining Admixture: Comply with ASTM C260. "Specifications for Air-

Entraining Admixtures for Concrete.

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REINFORCING, & FORMWORK

b. Water Reducing Admixture: Comply with ASTM C494 "Specifications for

Chemical Admixtures for Concrete, Type A and compatible with air entraining admixture.

c. Water Reducing and Retarding Admixture: Comply with ASTM C494, "Specifications for Chemical Admixtures for Concrete, Type D, and compatible with air entraining admixture.

d. High Range Water Reducing Admixture: Comply with ASTM C494, "Specifications for Chemical Admixtures for Concrete, Type F or G, and compatible with air entraining admixture. (Including superplasticizer to reduce water content.)

e. Admixtures containing added calcium chloride are not permitted.

4. Aggregates: Shall conform to ASTM C 33 and shall be quarried/mined in fresh water.

Aggregates from salt water or brackish water are not permitted. Coarse aggregate size shall not exceed:

Concrete Member Size

Walls 3/4" 67#

Columns and all other concrete 1" 57#

Drilling concrete pad or slabs on ground 1" 57#

B. Portland cement and reinforcing steel: Comply with ACI 301-96 and, with all modifications and supplements thereto listed in Part 3 of this specifications.

C. Burlap mats: Conform to AASHTO Specification M182. (Burleen non-staining mats.)

D. Epoxy bonding agent: A two (2) component, solvent free, moisture insensitive structural epoxy adhesive conforming to ASTM C881-90 Type II, Sikadur 32 Hi-Mod, as manufactured by Sika

Corp., Concresive 1090 Liquid by Master Builders or approved equal.

E. Anchor bolts, nuts, and washers: Conform to ASTM A449-89, hot-dip galvanized.

F. Dovetail slots: Galvanized steel, 22-gauge, 1"x 1", with 5/8" throat, fiber filled.

G. Forms:

1. Plywood Forms: PS-1, B-B Concrete Form, Class I, exterior type, mill oiled, and edge sealed. Thickness shall be as required to support concrete at the rate placed, but not less than 3/4".

2. Steel Forms: Uncoated steel, 3/16"-inch minimum thickness, fabricated to close tolerances, protected only by the specified release agent, braced so as not to dent, bend, or dimple under wet concrete loads, vibrator impact and tool impact. Maintain steel forms in rust free condition by use of steel wool and light grinding, followed by coats of the specified release agent. Forms should be adjustable to be brought into true alignment without steps or ridges.

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H. Form release agent:

1. For plywood forms use a natural non-petroleum base, non-staining and non-retarding release agent that will effectively prevent absorption of moisture and prevent bond with concrete and leaves the concrete with a paintable surface.

2. For steel forms, use an approved material that will not stain, color, or otherwise affect the finish of the concrete. Form coating shall not be detectable on finished surfaces.

3. Round column forms: Provide seamless fiber forms with the three plies nearest to the interior surface of the form deckled or scarfed and overlapped to minimize spiral gaps or seams on the column surface.

I. Form Ties: Steel rod type with integral water stops and cones, and with ends or end fasteners that can be removed without spalling the concrete and which leave a hole equal in depth to the required reinforcement clearance, but not less than 2 inches from the formed face of the concrete. Wire tie, banding wire and wood spreaders will not be permitted.

J. Form Inserts:

1. Bevel or chamfer strips: Wood or non-staining plastic, 3/4" wide on each leg at exposed edges of concrete members, unless otherwise noted on plans.

2. Tongue and Groove Joint Forms: Minimum 24 gauge with steel stakes and splice plates.

Forms shall be designed for joints not to receive a poured seal.

3. Pipe hangers and other utility supports: AISI Type 316 stainless steel.

K. Non-Shrink Grout: Non-shrink, non-metallic grout conforming to ASTM C 1107 Grade B or

Grade C only. Grout must meet ASTM C 1107 at a temperature range of 50 F to 90 F at a flowable consistency.

L. Grout for Surface Repair and Bond Coat:

1. For repair, one part Portland cement to two parts fine sand, and a 50%of water and 50%

Acryl 60 or equal (Thoroseal or Acryl Set Bonding Agent by Master Builders) to produce a stiff mortar.

2. For bond coat, one part Portland cement to one part sand, and a 50% of water and 50%

Acryl 60 or equal (Thoroseal or Acryl Set Bonding Agent) to produce a slurry mix.

M. Moisture Barrier: Kraft paper and glass reinforcing fibers sandwiched between 2 layers of polyethylene film with a permeance rating of maximum 0.1 as per ASTM E-96, Procedure A.

N. Preformed Expansion Joint Filler: Non-extruding type, self-expanding cork, 3/4", 1", and 1½" cork (not to be used for sidewalks), conforming to plans or as otherwise noted on drawings, conforming to the requirements of ASTM D1752, Type II, and compatible with joint sealant compound.

O. Joint Sealant Compound: Non-sag, 2 component, solvent free, moisture insensitive, flexible, epoxy resin conforming to the requirements ASTM C920-87 Type M, Grade NS. Additionally, the sealant must be recommended by the manufacturer to perform under continuous immersion in water.

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P. Polyurethane Elastomeric Sealant: Sikaflex-2c, NS/SL or approved equal. Provide a 2-component, premium-grade, polyurethane-based, elastomeric sealant. It is principally a chemical cure in a non-sag and self-leveling consistency. Sealant shall meet ASTM C-920 and

Federal Specifications TT-S-00227E.

1. Joint Movement: +50%.

Q. Waterstops:

1. Volclay Waterstop-RX or approved equal. Flexible strip of bentonite waterproofing compound in coiled form.

a. Chemical Composition:

1) Butyl Rubber-Hydrocarbon: 24.9% by weight; ASTM D-297.

2) Bentonite: 75 % by weight; SS-S-210-A.

3) Volatile Matter: Below 1 %; ASTM D-6.

4) Waterstop shall not contain any asbestos fibers or asphaltics.

5)

b. Physical Properties:

1) Specific Gravity: 1.57; ASTM D-71.

2) Application Temperature Range: 5-125 F.

3) Flash Point: 365; ASTM D 93-97.

4) Accelerated Aging: Maintained 99% solids. 5) Dimensions: 1" x 3/4" x 16'-6"

2. Polyvinyl chloride (PVC): Conforming to the requirements of U.S. Army Corps of

Engineers Specification CRD-C-572 and of the following type:

a. Expansion Joints: 9-inches by 3/8-inch, ribbed center bulb.

b. Construction Joint: 9-inches by 3/8-inch, flat ribbed.

c. Only where specified on Plans at construction and expansion joints: 9-inches by 3/8-inch, split ribbed.

d. Install waterstops as shown as manufactured structures.

R. Fiber Reinforcement: Fiber reinforcement shall not be used in the concrete unless ordered buy the Contracting Officer in writing. It shall consist of 100% virgin polypropylene fibrillated fiber- dosage of 2 lbs. per cubic foot.

1. Compressive Strength: 1 psi (.006895 M Pa), ASTM C-39.

2. Flexural Strength: 288 psi (2.0 M Pa) after 7 days, 390 psi (2.7 M Pa) after 28 days;

ASTM C-78.

3. Splitting Tensile Strength: 194 psi (1.3 M Pa) after 7 days, and 290 psi (2.0 M Pa) after

28 days; ASTM C-496.

4. Source: Fibermesh Micro-Reinforcement System by Fibermesh Company, Division of

Synthetic Industries, Inc. Or approved equal.

S. Provide other materials, not specifically described but required for a complete and proper installation, as selected by the Contractor subject to the approval of the Contracting Officer.

T. A shrinkage reducing admixture (Teraguard) or equivalent at the rate of 2.2% by weight of cement may be used in the concrete to meet the shrinkage limitations.

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U. To protect the concrete slab against the elements, the Contracting Officer may direct the

Contractor to spray an evaporation retarder on the finished concrete slab immediately behind the cement finishing process at no additional cost to the Government. This is not a curing compound.

PART 3 – EXECUTION

3.1 SURFACE CONDITIONS

A. Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work.

3.2 SUPPLEMENTAL REQUIREMENTS

A. All phases of concrete construction, including materials formwork, and all other related procedures shall comply with the most stringent allowed tolerances of ACI-301 and ACI-117

Standards (Latest Edition) - Noncompliance with these standards will cause full rejection of any work done.

B. Comply with ACI 301-96 and with all modifications and supplements thereto listed herein. In addition to the ACI Standards on finished concrete, the Contracting Officer will only approve quality finished concrete which in his opinion is ready to receive a grout finish, paint, or liquid membrane.

C. The following modifications and supplements to ACI 301-96 shall also apply to the work.

1. General

a. These specifications cover cast-in-place structural concrete for use in buildings and appurtenances, including foundations, curbs, sidewalks, concrete pavements and utility structures, water containment tanks, and piles.

b. Keep minimum 2 copies of ACI 301-96 "Specifications for Structural Concrete" in field office at all times.

2. Proportioning and Design of Mixes:

a. General: Proportion concrete to meet properties as specified. Prepare mix designs for each type and strength of concrete. Submit with mix design the chemical admixture manufacturer’s statement that the admixture proposed complies with the requirements of this specification. Where concrete of different strengths are specified for the same location, the higher strength concrete shall be used. Concrete proportions shall be established on the basis of previous field experience, or laboratory trial batches as specified in ACI 301-96 Sections 4.2.2 & 4.2.3.

b. Classes of Concrete:

1) Structural concrete of normal weight for portions of the structure that are required to be watertight containments or tremie concrete, the water/cementitious ratio shall not exceed 0.45 if exposure is to be to fresh water.

2) If the concrete is exposed to salt or brackish water, or if exposed to injurious concentrations of sulfate-containing solutions (1500 ppm or more of Sulfate in water) or other chemically aggressive solutions, use Type II cement with

Rheobuild 1000 admixture by Master Builders, or approved equal;

water/cementitious ratio shall not exceed 0.34.

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3) Other Concrete: (This would be slabs-on-grade, concrete thrust blocks, and miscellaneous concrete). The water cementitious ratio shall not exceed 0.50 to

0.55.

4) Minimum f’c @ 28 days shall be 4000 KSI with a Water/Cement ratio of 0.45.

5) Minimum f’c @ 28 days shall be 7000 KSI with a Water/Cement ratio of 0.34.

c. Slumps:

1) All structural concrete, pumped concrete and tremie concrete shall contain a

High Range Water Reducing Admixture and be designed with a maximum water content of 270 pounds per cubic yard. The initial water slump prior to addition of the High Range Water Reducing Admixture shall be 2-inch maximum.

Concrete at point of placement shall not exceed 10-inches. Concrete shall be non-segregating.

2) Slabs including slabs-on-grade, and all other concrete shall have a maximum water content of 287 pounds per cubic yard and have a 5-inch maximum slump with a water reducer, or water reducer and retarder admixture added.

3. Formwork

a. Earth cuts are not permitted for forms for vertical surfaces. Footings, grade beams and slab edges shall be formed. Provide moisture barrier under all slabs on grade.

Lap 6-inches and tape punctures.

b. The contractor is responsible for the adequacy of forms and shoring including placing, fill and equipment on roof, and for safe practice in their use and removal.

Submit formwork calculations, and shop drawings including shoring and reshoring.

In addition, the calculations and shop drawings for formwork, shoring, and reshoring, if required by the Contracting Officer or Building Department, shall be signed and sealed by a Professional Engineer registered in the State of Florida.

c. Design forms for the loads and lateral pressures resulting from the placement and vibration of concrete and for design considerations, wind loads, allowable stresses, and other applicable requirements of the South Florida Building Code.

d. Provide form facing materials as required by the specified finish of the formed surface. Do not use facing material with raised grain, torn surfaces, worn edges, patches, dents or other defects. No form may be reused more than three times without the Contracting Officer’s approval. The maximum deflection permitted of facing materials reflected in concrete surfaces exposed to view is 1/240 of the span between structural members.

1) Forms shall be free from surface defects, tight to prevent leakage and braced to keep its position and shape when filled with concrete. Adjacent edges and end panels and sections shall be held together to provide accurate alignment and prevent forming ridges, fins, offsets or similar type defects in finished concrete.

It shall be tight to prevent loss of water, cement, or fines during placing and vibrating concrete. The bottom of the forms placed in continuous straight even footings or slabs shall be watertight to prevent loss of water, cement and fines during placement and vibration of concrete, a gasket may be required by the

Contracting Officer under the forms to provide water tightness at the Contractor expense. The Contractor shall not proceed to place forms for concrete work adjacent to or on top of previous placed concrete without the Contracting

Officer's approval, if the stripped forms reveal columns, walls or beams are out of level or plumb or there are cold joints or other objectionable work in the opinion of the Contracting Officer. Contractor shall submit to the Contracting

Officer for approval, how he intends to correct or remove the defective work promptly at his expense. Contractor shall perform such corrections prior to proceeding to place concrete in the next Section.

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e. Provide positive means of adjustment (wedges or jacks) of shores and struts, and all settlement shall be taken up during concrete placing operation. Brace forms securely against lateral deflection. Do not anchor form bracing to poured concrete floors or make holes in floor.

f. Provide temporary openings in columns and wall forms to limit the free fall of concrete to 5 feet. Place such openings at no more than 8 feet apart to facilitate placing and consolidation of concrete. Any evidence of non-intended items in the forms is considered sufficient cause to stop concreting operation and/or require removal of concrete placed in such contaminated forms.

g. Provide inserts, conduits, boxes, sleeves, anchors, ties, bolts, hangers, dowels, thimbles, nailers, grounds, and other devices in coordination with other trades.

h. Set anchor bolts and other embedded items accurately and hold securely until concrete is placed and set. Anchor bolts shall be galvanized and of size and length as indicated on the Contract Drawings. Bolts not sized shall be 3/4-inch diameter.

i. Do not use pinch bars, wrecking bars or other metal tools against as-cast concrete to wedge forms loose; use only wooden wedges carefully and gradually. Driving shall be accomplished by light tapping.

j. The Contractor is responsible for the removal of forms and shores. Do not remove forms or shores before the member has attained sufficient strength to support its weight and the loads imposed, nor sooner than listed below:

1) Wall forms: 24 hours.

2) Slab forms: 14 days.

4. Reinforcement

a. Prior to fabrication, submit for review shop drawings showing all fabrication dimensions, bar lists and location for placing of the reinforcing steel and accessories, including spacing of reinforcing, splices (lap, welded, Cadweld and/or mechanically threaded), grade of reinforcing and name of manufacturer. Note all deviations from the Contract Drawings and use the same designation mark as shown on the Contract

Drawings where possible.

b. Reinforcing bars: ASTM A615, Grade 60, deformed bars of USA manufacturer.

c. Welded wire fabric: ASTM A185, galvanized.

d. Metal bar supports: CRSI MSP-1, Chapter 3, Class 2, Type B stainless steel protected bar supports.

e. Coupler Splice Devices: Cadweld, tension couplers capable of developing the ultimate strength of the bar.

f. Reinforcing steel upon which unauthorized welding has been done, shall be removed and replaced at no additional cost to the Government.

g. Place reinforcing bars to the most stringent tolerances indicated in ACI 301 and ACI

117 (Latest Edition). Tolerances specified in those standards shall govern over any other reference code or standard.

h. All reinforcement at time concrete is placed, shall be free of mud, oil or other materials that may affect or reduce the bond. Reinforcing with rust or mill scale will not be accepted without cleaning and/or brushing to remove scale and rust.

i. Support rebar and mesh reinforcing for slabs on grade 1½ inches from top of slab on masonry blocks not less than 4 sq. in., having a compressive strength equal to or greater than the specified strength of the concrete being placed. Space blocks at no more than 4 feet apart each way for rebars, and no more than 3 feet apart for mesh reinforcement.

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j. Support reinforcing off from formwork with stainless steel protected bar supports.

Support slab reinforcing on #5 bars, or larger, spaced at no more than 48 inches on center. Space individual highchairs no more than 48 inches apart and support bars shall not exceed 24 inches past outermost chairs.

k. Overlap welded wire fabric in such a manner that the overlap measured between outermost cross wires of each fabric sheet is not less than the spacing of the cross wires plus 2 inches or 6 inches, whichever is greater. Do not extend fabric through expansion and/or contraction joints, unless otherwise noted on the Contract

Drawings.

l. The minimum clear distance between parallel bars, both vertical and horizontally, shall not be less than the nominal diameter of the bars, or less than 1½ times the maximum size of the aggregate, or 1-inch in beams, or 1½ inches in columns, whichever is greater. Where reinforcement in beams is placed in two or more layers, the upper layer shall be placed directly above the bars in the bottom layer.

Misplacement, misalignment, or improper length of dowels shall be sufficient cause to require removal and reconstruction of affected work.

m. Unless allowed by the Contracting Officer, bending of reinforcing partially embedded in concrete is not permitted. When permitted, bending shall be in accordance with CRSI Manual of Standard Practice.

5. Joints and Embedded Items.

a. Provide pre-molded expansion joint filler strips of proper width and length as specified in the Contract Drawings. Place ½" expansion joint fillers every 20 feet in straight runs of walkways or sidewalks, at right angle turns and wherever concrete butts into vertical surfaces, unless otherwise noted on the Contract Drawings.

b. Provide waterstops in all construction joints, unless otherwise indicated on the

Contract Drawings.

c. Join all waterstops at all intersections so that a continuous seal is provided. Center the waterstop in the joint. Hold water stop positively in correct position. In the event of damage to the waterstop, repair the water stop in an acceptable manner. Vibrate concrete to obtain impervious concrete in the vicinity of all joints.

d. Install waterstop in accordance with instructions of the manufacturer. Prior to use of the waterstop material in the field, submit to the Contracting Officer for approval a sample of each size and shape to be used. Fabricate sample so that the material and workmanship represent in all respects the fittings to be furnished under this

Specification.

e. Place all sleeves, inserts, anchors, and other embedded items prior to placing concrete. Anchors and bolts cast in concrete shall be hot dip galvanized or stainless steel. Where permitted by the Contracting Officer, concrete expansion bolts shall be stainless steel and of the wedge anchor type. Take all necessary precautions to prevent embedded items from being displaced, broken or deformed during concreting operation. Protect drains from intrusion of concrete.

6. Placing:

a. Equipment for mixing and transporting concrete must be clean. Forms shall be thoroughly clean and damp, and reinforcing shall be secured in place. Runaways for transporting concrete shall not rest on reinforcing. When concrete is placed against earth, sprinkle sufficiently before placing.

b. Deposit of concrete in forms no longer than 90 minutes after the initial design water has been added to the cement and aggregates. Concrete which cannot be so placed shall not be used and shall be wasted. No additional water shall be added. No retempering with water is permitted.

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c. In addition to the requirements of ASTM C94, the concrete delivery tickets shall indicate the cement content and water/cement ratio.

d. During hot weather, proper attention shall be given to ingredients, production methods, handling, placing, protection, and curing. Comply with ACI 305R "Hot

Weather Concreting" recommendations.

e. Do not place concrete in forms unless the water level is below the concrete to be placed, even if it is necessary to maintain the dewatering, or under rain.

f. Do not place concrete under water except for tremie concrete as called for on the

Contract Drawings. Submit for approval plan and details of means and methods for installation of seal tremie concrete prior to commencement of work. Seal concrete which subsequently fails to perform, shall be repaired or replaced at no additional cost to the Government.

g. Place seal concrete under water in the space in which it is to remain, by means of a tremie, a closed-bottom dump bucket of not less than one cubic yard capacity, or other approved method, and do not disturb after it is deposited. Deposit all seal concrete in one continuous pour. Do not place concrete in running water. Design all formwork, to retain concrete under water, to be watertight. Submit shop drawings for the design of formwork and excavation sheeting signed and sealed by a Florida

Registered Professional Engineer.

h. The tremie shall consist of a tube having a minimum inside diameter of 10 inches and shall be constructed of sections having tight joints. No aluminum parts which have contact with the concrete will be permitted. The discharge end shall be entirely seated at all times and the tremie tube kept full to the bottom of the hopper. When a batch is dumped into the hopper, the tremie shall be slightly raised (but not out of the concrete at the bottom) until the batch discharges to the bottom of the hopper, after which the flow shall be stopped by lowering the tremie. The means of supporting the tremie shall be such as to permit the free movement of the discharge end over the entire top surface of the work and shall permit it being lowered rapidly when necessary to choke off or retard the flow. The flow shall preferably be continuous and in no case shall be interrupted until the work is completed. Exercise special care to maintain still water at the point of deposit.

i. When the concrete is placed by means of a bottom dump bucket, the bucket shall be lowered gradually and carefully until it rests upon the concrete already placed. The bucket shall then be raised very slowly during the discharge travel; the intent being to maintain, as nearly as possible, still water at the point of discharge and to avoid agitating the mixture. Aluminum buckets will not be permitted.

j. Do not commence pumping, to…