A06 Attachment 2 SPECS PART 2 MORAN 198970 249646 09032020.pdf

PROJECT SPECIFICATIONS: PART 2

Rehabilitate Moran Water Transmission Lines

PMIS NO. 198970

Replace Moran Wells

PMIS NO. 249646

GRTE – 249646 – MORAN WELL HOUSE 010000 - 1

SPECIFICATIONS TABLE OF CONTENTS

GRAND TETON NATIONAL PARK

TETON COUNTY, WYOMING

MORAN WELL HOUSE

PARK: (GRTE)

PMIS/PKG NO.: 198970 / 249646

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

DENVER SERVICE CENTER

4/30/2020

GRTE – 249646 – MORAN WELL HOUSE 010000 - 2

TABLE OF CONTENTS

VOLUME I

DIVISION 01 - GENERAL REQUIREMENTS –

DIVISION 01 NOT INCLUDED IN THIS SPECIFICATION PACKAGE – SEE

GTNP PERFORMANCE WORK STATEMENT & PROJECT SPECIFICATIONS.

DIVISION 02 – EXISTING CONDITIONS

DIVISION 02 NOT INCLUDED IN THIS SPECIFICATION PACKAGE – SEE

GTNP PERFORMANCE WORK STATEMENT & PROJECT SPECIFICATIONS.

DIVISION 03 – CONCRETE

033000 CAST-IN-PLACE CONCRETE

033700 CONCRETE CURING

036000 GROUTING

DIVISION 04 – MASONRY

042000 CONCRETE UNIT MASONRY

DIVISION 05 – METALS

055010 ANCHOR BOLTS AND EXPANSION ANCHORS

DIVISION 06 – WOOD, PLASTICS AND COMPOSITES

061053 MISCELLANEOUS ROUGH CARPENTRY

061600 SHEATHING

061753 SHOP-FABRICATED WOOD TRUSSES

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

071326 SELF ADHERING SHEET WATERPROOFING

072100 THERMAL INSULATION

072500 WEATHER BARRIERS

074113 STANDING-SEAM METAL ROOF PANELS

074619 STEEL SIDING

076200 SHEAT METAL FLASHING AND TRIM

079200 JOINT SEALANTS

DIVISION 08 – OPENINGS

GRTE – 249646 – MORAN WELL HOUSE 010000 - 3

081113 HOLLOW METAL DOORS AND FRAMES

087100 DOOR HARDWARE

088000 GLAZING

DIVISION 09 – FINISHES

099113 EXTERIOR PAINTING

099123 INTERIOR PAINTING

DIVISION 10 – THRU DIVISION 21 ....................................................................... (NOT USED)

DIVISION 22 – PLUMBING

220523.12 VALVES FOR PLUMBING PIPING

220529 HANGERS & SUPPORTS FOR PLUMBING PIPING & EQUIPMENT

221116 DOMESTIC WATER PIPING

221119 DOMESTIC WATER PIPING SPECIALTIES

221316 SANITARY WASTE AND VENT PIPING

221319 SANITARY WASTE PIPING SPECIALTIES

224500 EMERGENCY PLUMBING FIXTURES

DIVISION 23 – HEATING, VENTILATING, AND AIR CONDITIONING

(NOT USED) SEE GTNP PROJECT SPECIFICATIONS

DIVISION 25 – INTEGRATED AUTOMATION

255100 INTEGRATED CONTROL

DIVISION 26 – ELECTRICAL

260500 COMMON WORK RESULTS FOR ELECTRIC

260503 EQUIPMENT WIRING CONNECTIONS

260519 LOW VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

260526 GROUNDING AND BONDING

260533 RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS

260553 IDENTIFICATION FOR ELECTRICAL SYSTEMS

262200 LOW VOLTAGE TRANSFORMERS

262416 SWITCHBOARDS AND PANELBOARDS

262726 WIRING DEVICES

262813 FUSES

262819 ENCLOSED SWITCHES

265100 INTERIOR LIGHTING

DIVISION 27 & DIVISION 28................................................................................... (NOT USED)

GRTE – 249646 – MORAN WELL HOUSE 010000 - 4

DIVISION 31 – EARTHWORK ......... (NOT USED) SEE GTNP PROJECT SPECIFICATIONS

DIVISION 32 – EXTERIOR IMPROVEMENTS ................................................... (NOT USED)

DIVISION 33 – UTILITIES ....................................................................................... (NOT USED)

END OF INDEX

GRTE 249646 – MORAN WELL HOUSE DIV 3

DIVISION 3

CONCRETE

GRTE – 249646 -MORAN WELL HOUSE

033000 - 1

CAST-IN-PLACE CONCRETE

SECTION 033000 - CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this section.

1.2 SUMMARY

A. Section includes Cast-in-place concrete; including formwork, form accessories, form stripping & openings for other work, reinforcing steel & accessories, concrete materials, mixture design, placement procedures, and finishes, for the following:

1. Well House:

a. Footings

b. Foundation Walls

c. Slabs-on-grade

B. Related Sections:

1. Section 033700 – Concrete Curing

2. Section 036000 – Grouting

3. Section 042000 – Concrete Unit Masonry

4. Section 055010 – Anchor Bolts and Expansion Anchors

5. Section 079200 – Joint Sealers

1.3 REFERENCES

A. American Concrete Institute:

1. ACI 117 – Standard Tolerances for Concrete Construction and Materials

2. ACI 211.1 – Selecting Proportions for Normal, Heavyweight, and Mass Concrete

3. ACI 214 – Recommended Practice for Evaluation of Strength Test Results of Concrete

4. ACI 301 - Specifications for Structural Concrete for Buildings

5. ACI 302.1R – Guide for Concrete Floor and Slab Construction

6. ACI 304 – Recommended Practice for Measuring, Mixing, Transporting, and Placing

Concrete.

7. ACI 305 - Hot Weather Concreting.

8. ACI 306.1 - Standard Specification for Cold Weather Concreting.

9. ACI 308.1 - Standard Specification for Curing Concrete.

10. ACI 309 – Guide for Consolidation of Concrete

11. ACI 315 – Details and Detailing of Concrete Reinforcement

12. ACI 318 - Building Code Requirements for Structural Concrete.

13. ACI 347 – Guide to Formwork for Concrete

14. ACI 350 – Code Requirements for Environmental Engineering Concrete Structures

15. ACI SP-66 – American Concrete Institute Detailing Manual

033000 - 2

B. ASTM International:

1. ASTM A615/A615M – Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement.

2. ASTM A1064/A1064M – Standard Specification for Carbon-Steel Wire and Welded Wire

Reinforcement, Plain and Deformed, for Concrete.

3. ASTM C31/C31M - Standard Practice for Making and Curing Concrete Test Specimens in the Field.

4. ASTM C33 - Standard Specification for Concrete Aggregates.

5. ASTM C39/C39M - Standard Test Method for Compressive Strength of Cylindrical

Concrete Specimens.

6. ASTM C42/C42M - Standard Test Method for Obtaining and Testing Drilled Cores and

Sawed Beams of Concrete.

7. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete.

8. ASTM C127 – Standard Test Method for Specific Gravity and Absorption of Course

Aggregate.

9. ASTM C128 – Standard Test Method for Specific Gravity and Absorption of Fine

Aggregate.

10. ASTM C143/C143M - Standard Test Method for Slump of Hydraulic Cement Concrete.

11. ASTM C150 - Standard Specification for Portland Cement.

12. ASTM C172 - Standard Practice for Sampling Freshly Mixed Concrete.

13. ASTM C173/C173M - Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method.

14. ASTM C192 – Standard Practice for Making and Curing Concrete Test Specimens in the

Laboratory.

15. ASTM C231 - Standard Test Method for Air Content of Freshly Mixed Concrete by the

Pressure Method.

16. ASTM C260 - Standard Specification for Air-Entraining Admixtures for Concrete.

17. ASTM C330 - Standard Specification for Lightweight Aggregates for Structural Concrete.

18. ASTM C494/C494M - Standard Specification for Chemical Admixtures for Concrete.

19. ASTM C595 - Standard Specification for Blended Hydraulic Cements.

20. ASTM C618 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural

Pozzolan for Use as a Mineral Admixture in Concrete.

21. ASTM C685/C685M - Standard Specification for Concrete Made By Volumetric Batching and Continuous Mixing.

22. ASTM C845 - Standard Specification for Expansive Hydraulic Cement.

23. ASTM C989 - Standard Specification for Ground Granulated Blast-Furnace Slag for Use in Concrete and Mortars.

24. ASTM C1017/C1017M - Standard Specification for Chemical Admixtures for Use in

Producing Flowing Concrete.

25. ASTM C1064/C1064M - Standard Test Method for Temperature of Freshly Mixed

Hydraulic-Cement Concrete.

26. ASTM C1240 - Standard Specification for Silica Fume Used in Cementitious Mixtures.

27. ASTM C1260 – Test Method for Potential Alkali Reactivity of Aggregates.

28. ASTM C1567 – Test Method for Determining the Potential Alkali-Silica Reactivity of

Combinations of Cementitious Materials and Aggregate.

29. ASTM D395 – Test Methods for Rubber Property – Compression set.

30. ASTM D412 – Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and

Thermoplastic Elastomer – Tension.

31. ASTM D624 – Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and

Thermoplastic Elastomer.

32. ASTM D746 – Test Method for Brittleness Temperature of Plastics by Impact.

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33. ASTM D792 – Test Method for Specific Gravity (Gravity Density) and Density of Plastics by Displacement.

34. ASTM D994 - Standard Specification for Preformed Expansion Joint Filler for Concrete (Bituminous Type).

35. ASTM D1190 – Concrete Joint Sealer, Hot-Poured Elastic Type.

36. ASTM D1751 - Standard Specification for Preformed Expansion Joint Filler for Concrete

Paving and Structural Construction (Nonextruding and Resilient Bituminous Types).

37. ASTM D1752 - Standard Specification for Preformed Sponge Rubber and Cork Expansion

Joint Fillers for Concrete Paving and Structural Construction.

38. ASTM D6690 - Standard Specification for Joint and Crack Sealants, Hot Applied, for

Concrete and Asphalt Pavements.

39. ASTM E1643 - Standard Practice for Installation of Water Vapor Retarders Used in

Contact with Earth or Granular Fill under Concrete Slabs.

40. ASTM E1745 - Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs.

41. CRSI – Concrete Reinforcing Steel Institute – Manual of Standard Practice.

42. CRSI – Placing Reinforcing Bars, 8th edition.

1.4 DEFINITIONS

A. Cementitious Materials: Portland cement alone or in combination with one or more of the following: blended hydraulic cement, fly ash and other pozzolans, ground granulated blast-furnace slag, and silica fume; subject to compliance with requirements.

1.5 PERFORMANCE TOLERANCES

A. Cast in Place concrete shall conform to ACI 307R and ACI 347, as modified herein. In case of conflict, ACI 347 governs.

1.6 SUBMITTALS

A. Product Data: Submit data on joint devices, attachment accessories, admixtures, concrete mix designs; and all items pertaining to cast-in-place concrete.

B. Steel Reinforcement Shop Drawings: Drawings that detail fabrication, bending, and placement.

Include bar sizes, lengths, material, grade, bar schedules, bent bar diagrams, bar arrangement, splices and laps, mechanical connections, and supports for concrete reinforcement.

1. Submit Shop drawings for fabrication, bending and placement of concrete reinforcement.

2. Include material lists, material designations, bend types and details, lap splice lengths, placement drawings, and manufacturer’s literature for any securing materials.

3. Shop Drawings must be clear and easy to review.

4. Comply with ACI 315, showing bar sizes, schedules, openings, spacing’s, locations, bent bar diagrams, and quantities of reinforcing steel and wire fabric.

5. Shop Drawings shall indicate bar sizes; spacing’s; locations; and quantities of reinforcing steel, as well as bending and cutting schedules, and supporting and spacing devices.

6. Include pertinent dimensions, materials, bracing, and arrangement of joints and ties.

033000 - 4

C. Concrete Design Mixtures: For each concrete mixture. Submit alternate design mixtures when characteristics of materials, Project conditions, weather, test results, or other circumstances warrant adjustments.

1. Submit Concrete mix design for each strength of concrete specified. Submit separate mix designs when admixtures are required for Hot and cold weather concrete work and air entrained concrete work.

2. Submit Concrete mixture proportions and characteristics of proposed mix design along with test data identifying compression strength at 7 day and 28 day testing.

3. Mix design to include proposed admixtures to provide workability; prevention of rapid drying; and improved finishing capabilities’ for the contractor to achieve acceptable placement, finishing and consolidation; with concrete mix requirements of Low Water Cement Ratio and low slump.

4. Mix design and admixtures must have the minimum strength and properties required.

5. Proportions of materials for concrete shall be established to provide workability and consistency to permit concrete to be worked readily into forms and around reinforcement under conditions of placement to be employed, without segregation or excessive bleeding.

6. Concrete Mix Design & Laboratory Test reports to include:

a. Slump Range on which the design is based.

b. Total gallons of water per cubic yard.

c. Brand, type, composition and quantity of fly ash (if used)

d. Specific gravity and gradation of each aggregate.

e. Ratio of fine to total aggregates.

f. Surface-dry weight of each aggregate per cubic yard.

g. Brand, type, ASTM designation, and active chemical ingredients and quantity of each admixture.

h. Air content and tolerance.

i. Water/Cementitious material ratio and tolerance.

j. Compressive strength based on 7 day and 28 day compression tests in accordance with ASTM C39.

k. Submit supplier certified fly ash test reports for each shipment delivered to concrete supplier.

l. Signed by contractor and concrete supplier.

D. Concrete Mix Product Data:

1. Provide product data on all admixtures and components of the mix design.

a. Hot and cold weather concrete work.

b. Air entrained concrete work.

2. Identify mix ingredients and proportions, including admixtures.

3. Indicate amounts of mixing water to be withheld for later addition at Project site.

E. Concrete Delivery:

1. The Contractor shall submit for approval, a plan for the uninterrupted delivery, placement, and curing procedures to be used for each pour between construction joints; at least 14 days prior to anticipated placement.

2. The Concrete Delivery Plan shall include alternatives for delivery and placement procedures, in the event of unforeseen mechanical malfunctions or other delays.

3. Backup supply sources and placement equipment should be available for use within 30 minutes in the event of primary supply or equipment breakdown.

033000 - 5

4. The Delivery Plan shall also include a plan to keep concrete in acceptable condition during delivery time. Timing of successive delivery trucks, and course of action if one truck is delayed on delivery or delayed on placement, shall be provided along with the effects on additional deliveries.

5. The Contractor must coordinate with the concrete mix provider to develop a plan of action if the concrete mix arrives on site and is out of specification for air content; slump; or water cement ratio, or if the concrete mix is not of consistency to permit workability and placement without segregation or excessive bleeding.

a. If the concrete mix is out of specification and the specification requirements cannot be achieved on site; the concrete will be rejected and not allowed to be placed.

1.7 INFORMATIONAL SUBMITTALS

A. Material Certificates: For each of the following, signed by manufacturers:

1. Cementitious materials.

2. Admixtures.

3. Form materials and form-release agents.

4. Steel reinforcement and accessories.

5. Curing compounds.

6. Floor and slab treatments.

7. Bonding agents.

8. Adhesives.

9. Semirigid joint filler.

10. Joint-filler strips.

11. Repair materials.

1.8 QUALITY ASSURANCE

A. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C 94/C 94M requirements for production facilities and equipment.

B. Testing Agency Qualifications: A agency, qualified according to ASTM C 1077 and ASTM E 329 for testing indicated.

1. Personnel conducting field tests shall be qualified as ACI Concrete Field Testing Technician, Grade 1, according to ACI CP-1 or an equivalent certification program.

2. Personnel performing laboratory tests shall be ACI-certified Concrete Strength Testing Technician and Concrete Laboratory Testing Technician - Grade I.

C. Source Limitations: Obtain each type or class of cementitious material of the same brand from the same manufacturer's plant, obtain aggregate from single source, and obtain admixtures from single source from single manufacturer.

D. Concrete Testing Service: Engage a qualified independent testing agency to perform material evaluation tests and to design concrete mixtures.

E. The Contractor will employ a testing laboratory to perform tests and to submit test reports.

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F. Sampling and testing for quality control during placement of concrete shall be as indicated in Section 3 of this specification, and as directed by the Contracting Officer. Sampling Fresh Concrete: ASTM C172, except modified for slump to comply with ASTM C97.

G. Acquire cement and aggregate from same source for all Work.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Steel Reinforcement: Deliver, store, and handle steel reinforcement to prevent bending and damage. Store off the ground on platforms, skids, or other supports that will keep it from contract with the ground and cover to prevent unacceptable surface corrosion and contamination. Protect from oil, dirt, detrimental scale, paint, mechanical injury, and other deleterious materials.

1. All loose rust and mill scale must be removed from reinforcing steel prior to placement, with a wire brush. All reinforcing steel shall be inspected prior to placement in concrete.

B. Cement and Fly Ash: Store in moisture proof enclosures, do not use if caked or lumpy.

C. Aggregate: Store to prevent segregation and inclusion of foreign materials, do not use the bottom 6 inch of piles in contact with the ground.

D. Rubber and Plastic Materials: Store in a cool place off the ground and protected from moisture, dirt, oil, other contaminants, and do not expose to direct sunlight.

E. Protect all materials from damage during handling and installation in accordance with the manufacturer’s instructions.

F. Prepare a delivery ticker for each load of ready-mixed concrete. Truck operator shall hand the ticket to the Contractor at time of delivery and the ticket to show:

1. Quantity delivered

2. Actual quantity of each material in batch

3. Outdoor temperature in the shade

4. Time at which cement was added

5. Numerical sequence of the delivery

6. Quantity of water that can be added in the field based on the approved mix design

a. The Contractor must verify the quantity of water that can be added in the field after calculating the water cement ratio from the batch plant; and the water cement ratio with the addition of said quantity of water – before any water is added in the field.

b. The Contractor must be able to determine the water cement ratio of the mix from the quantities shown on the ticket, and the water cement ratio will be determined and verified for each truck prior to placement.

7. Free moisture in fine and coarse aggregate in percent by weight.

8. Temperature of batch.

033000 - 7

PART 2 - PRODUCTS

2.1 FORM-FACING MATERIALS –WELL HOUSE

A. Smooth-Formed Finished Concrete: Form-facing panels that will provide continuous, true, and smooth concrete surfaces. Furnish in largest practicable sizes to minimize number of joints.

1. Plywood, metal, or other approved panel materials.

2. Exterior-grade plywood panels, suitable for concrete forms, complying with DOC PS 1, and as follows:

a. High-density overlay, Class 1 or better.

b. Medium-density overlay, Class 1 or better; mill-release agent treated and edge sealed.

c. Structural 1, B-B or better; mill oiled and edge sealed.

d. B-B (Concrete Form), Class 1 or better; mill oiled and edge sealed.

B. Pan-Type Forms: Glass-fiber-reinforced plastic or formed steel, stiffened to resist plastic concrete loads without detrimental deformation.

C. Chamfer Strips: Wood, metal, PVC, or rubber strips, 3/4 by 3/4 inch, minimum.

D. Form-Release Agent: Commercially formulated form-release agent that will not bond with, stain, or adversely affect concrete surfaces and will not impair subsequent treatments of concrete surfaces.

1. Formulate form-release agent with rust inhibitor for steel form-facing materials.

E. Form Ties: Factory-fabricated, removable or snap-off metal or glass-fiber-reinforced plastic form ties designed to resist lateral pressure of fresh concrete on forms and to prevent spalling of concrete on removal.

1. Furnish units that will leave no corrodible metal closer than 1 ½ inch to the plane of exposed concrete surface.

2. Furnish ties that, when removed, will leave cone shaped holes no larger than 1 inch in diameter, and 1 ½ inches deep in concrete surface to allow filling and patching.

3. When a portion of single rod ties are to remain, there should be tightly fitted washer at the midpoint.

4. Furnish ties with integral water-barrier plates to walls indicated to receive dampproofing or waterproofing.

2.2 STEEL REINFORCEMENT

A. Reinforcing Steel Bars: ASTM A 615/A 615M, Grade 60; 60 ksi yield strength, deformed bars, uncoated free of deleterious materials.

B. Welded Wire Fabric: ASTM A1064, Plain Type, unfinished

C. Tie Wire: 16.5 gage or heavier, black annealed wire.

033000 - 8

2.3 REINFORCEMENT ACCESSORIES

A. Joint Dowel Bars: ASTM A 615/A 615M, Grade 60, plain-steel bars, cut true to length with ends square and free of burrs.

B. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place. Manufacture bar supports from steel wire, plastic, or precast concrete according to CRSI's "Manual of Standard Practice," of greater compressive strength than concrete and as follows:

1. For concrete surfaces exposed to view where legs of wire bar supports contact forms, use CRSI Class 1 plastic-protected steel wire or CRSI Class 2 stainless-steel bar supports.

2. For zinc-coated reinforcement, use galvanized wire or dielectric-polymer-coated wire bar supports.

3. Bar Supports: PS 7; CRSI Class B or E, fabricated from galvanized wire having PVC coated legs.

4. Chairs, Bolsters, Bar Supports, and Spacers are to be sized and shaped for strength and support of reinforcement during concrete placement conditions.

5. Zee bars (or High Chairs, with proper height) are required between top and bottom rebar mats in the foundation slab, along with chairs required below the bottom matt.

2.4 CONCRETE MATERIALS

A. Cementitious Material: Use the following cementitious materials, of the same type, brand, and source, throughout Project:

1. Portland Cement: ASTM C 150, Type II. Where aggregates are alkali reactive, a low-alkali cement having a maximum alkali content of 0.60% Na2O equivalent shall be used.

B. Fly Ash: ASTM C618, Class F or C, except loss on ignition not more than 5% & Available Alkalies (as Na2O) less than max % allowed.

C. Silica Fume: ASTM C 1240, amorphous silica.

D. Fine Aggregate: Clean, natural sand, ASTM C33; no manufactured or artificial sand. Free of materials with deleterious reactivity to alkali in cement.

E. Coarse Aggregate: Crushed rock, natural gravel, or other inert granular material graded, ASTM C33 except clay and shale particles no more than 1%. Free of all materials deleteriously reactive with alkalies in the cement in an amount to cause excessive expansion of concrete. Provide aggregates from a single source.

1. Maximum Coarse-Aggregate Size: 3/4 inch nominal.

F. Water: ASTM C 94/C 94M, potable.

1. Water to be Clean and free from injurious amounts of oils, acids, alkalis, salts, organic materials, or other substances that may be deleterious to concrete or steel.

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2.5 ADMIXTURES

A. Air-Entraining Admixture: ASTM C 260.

B. Chemical Admixtures: Provide admixtures certified by manufacturer to be compatible with other admixtures and that will not contribute water-soluble chloride ions exceeding those permitted in hardened concrete. Do not use calcium chloride or admixtures containing calcium chloride.

1. Water-Reducing Admixture: ASTM C 494/C 494M, Type A.

2. Retarding Admixture: ASTM C 494/C 494M, Type B.

3. Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type D.

4. High-Range, Water-Reducing Admixture: ASTM C 494/C 494M, Type F.

5. High-Range, Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type G.

6. Plasticizing and Retarding Admixture: ASTM C 1017/C 1017M, Type II.

C. Admixtures including Accelerators – High range water reducer; Retarders; and Plasticizers shall all be included in the concrete mix design for review and approval.

D. All admixtures must be accepted in writing by the Contracting Officer.

2.6 FLOOR AND SLAB TREATMENTS

A. Well House Interior and Exterior Slabs to have a Steel Troweled surface schedules to be exposed or painted. Texture interior floors and exterior slabs with non-slip broom finish in accordance with ACI 302.1R – “Class 1” Floors.

2.7 LIQUID FLOOR TREATMENTS –WELL HOUSE SLABS

A. Penetrating Liquid Floor Treatment: Clear, chemically reactive, waterborne solution of inorganic silicate or siliconate materials and proprietary components; odorless; that penetrates, hardens, and densifies concrete surfaces.

1. Manufacturers:

a. Chem Masters Silencure

b. Kaufman Products Inc. Silane Seal

c. Or Approved Equal

2.8 CURING MATERIALS

A. Cure concrete surfaces to requirements of Specification Section 033700 – Concrete Curing.

2.9 RELATED MATERIALS

A. Expansion- and Isolation-Joint-Filler Strips: ASTM D 175, asphalt-saturated cellulosic fiber.

B. Epoxy Bonding Adhesive: ASTM C 881, two-component epoxy resin, capable of humid curing and bonding to damp surfaces, of class suitable for application temperature and of grade to suit requirements, and as follows:

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1. Types IV and V, load bearing, for bonding hardened or freshly mixed concrete to hardened concrete.

2.10 ACCESSORIES

A. Provide formed openings where required for items to be embedded in, and passing through concrete work, including but not limited to pipe sleeves.

B. Locate and set in place items which will be cast directly into concrete.

C. Coordinate with work of other sections in forming and placing openings, bolts, anchors, steel plates and angles, pipe sleeves, other inserts and components of other work.

2.11 REPAIR MATERIALS

A. Repair Underlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/8 inch and that can be feathered at edges to match adjacent floor elevations.

1. Cement Binder: ASTM C 150, portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

2. Primer: Product of underlayment manufacturer recommended for substrate, conditions, and application.

3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by underlayment manufacturer.

4. Compressive Strength: Not less than 4000 psi at 28 days when tested according to

ASTM C 109/C 109M.

B. Repair Overlayment: Cement-based, polymer-modified, self-leveling product that can be applied in thicknesses from 1/4 inch and that can be filled in over a scarified surface to match adjacent floor elevations.

1. Cement Binder: ASTM C 150, portland cement or hydraulic or blended hydraulic cement as defined in ASTM C 219.

2. Primer: Product of topping manufacturer recommended for substrate, conditions, and application.

3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as recommended by topping manufacturer.

4. Compressive Strength: Not less than 5000 psi at 28 days when tested according to

ASTM C 109/C 109M.

2.12 CONCRETE MIXTURES, GENERAL

A. Prepare design mixtures for each type and strength of concrete, proportioned on the basis of laboratory trial mixture or field test data, or both, according to ACI 301.

1. Use a qualified independent testing agency for preparing and reporting proposed mixture designs based on laboratory trial mixtures.

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B. Cementitious Materials: Use fly ash, pozzolan, and silica fume as acceptable for the concrete mix design requirements. Limit percentage, by weight, of cementitious materials other than portland cement in concrete as follows:

1. Fly Ash: 20 percent.

2. Combined Fly Ash and Pozzolan: 20 percent.

3. Silica Fume: 10 percent.

4. Combined Fly Ash, Pozzolans, and Silica Fume: 30 percent with fly ash or pozzolans not exceeding 20 percent and silica fume not exceeding 10 percent.

5. The ratio of replacement by weight of Pozzolan to cement shall be 1.25 to 1.0.

C. Limit water-soluble, chloride-ion content in hardened concrete to 0.06 percent by weight of cement.

D. Admixtures: Use admixtures according to manufacturer's written instructions.

1. Use water-reducing, high-range water-reducing, or plasticizing admixture in concrete, as required, for placement and workability.

2. Use water-reducing and retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions.

3. Use water-reducing admixture in pumped concrete, concrete for heavy-use industrial slabs and parking structure slabs, concrete required to be watertight, and concrete with a water-cementitious materials ratio below 0.50.

2.13 CONCRETE MIXTURES FOR WELL HOUSE BUILDING ELEMENTS

A. Footings; Foundation Walls; & Slabs on Grade: Proportion normal-weight concrete mixture as follows:

1. Minimum Compressive Strength: 4000 psi at 28 days (2,680 psi at 7 days).

2. Maximum Water-Cementitious Materials Ratio: 0.5.

3. Minimum Cementitious Materials Content: 564 lb/cu yard (6 bag mix)

4. Slump Limit:

a. 4 inches for concrete with verified slump of 2 to 4 inches before adding high-range water-reducing admixture or plasticizing admixture, plus or minus 1 inch.

b. Slump shall not exceed 8” after adding plasticizer.

5. Air Content:

a. 5 % plus or minus 1.5 % at point of delivery for foundation walls and footings;

b. 6 % plus or minus 1 % for exterior slabs;

c. 3 % for interior slabs.

1) Do not allow air content of trowel-finish floors to exceed 3 percent.

2.14 FABRICATING REINFORCEMENT

A. Fabricate steel reinforcement accurately to the dimensions shown on the drawings and in accordance with the CRSI "Manual of Standard Practice" or the ACI Detailing Manual.

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B. Reinforcing bars shall be bent cold using appropriate bending tools, and should not be bent in a manner that will injure the material. Any bend is limited to an interior angle of 90 degrees or greater. Bending tools for #3 - #8 bars shall have a diameter of 6x bar diameter.

C. Field cutting of coated reinforcement should be performed using hydraulic-powered or friction cutting tools to minimize coating damage and field touch up. Flame cutting of coated reinforcement will not be permitted. Field cut coated reinforcement shall be repaired immediately with compatible patching material and suitable for repairs in the field.

D. Locate reinforcing splices not indicated on the drawings, at point of minimum stress. Review location of splices with Contracting Officer.

E. Reinforcement splices in horizontal mats must be offset by a minimum of 36 inches, unless noted otherwise on the project drawings. Stagger the splice above and below, or (left and right) each side of the center bar.

2.15 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M and furnish batch ticket information.

1. When air temperature is between 85 and 90 deg F (30 and 32 deg C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F (32 deg C), reduce mixing and delivery time to 60 minutes.

2.16 SOURCE QUALITY CONTROL

A. Test the proposed concrete mix for each size and gradation of aggregates and each consistency intended for use in the project.

B. Aggregates: Sample and test according to ASTM C33. Determine bulk specific gravity in accordance with ASTM C127 & ASTM C128.

PART 3 - EXECUTION

3.1 FORMWORK - GENERAL

A. Design, erect, shore, brace, and maintain formwork, according to ACI 301, to support vertical, lateral, static, and dynamic loads, and construction loads that might be applied, until structure can support such loads.

B. Construct formwork so concrete members and structures are of size, shape, alignment, elevation, and position indicated, within tolerance limits of ACI 117.

C. Limit concrete surface irregularities, designated by ACI 347 as abrupt or gradual, as follows:

1. 1/8 inch for smooth-formed finished surfaces.

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D. Construct forms tight enough to prevent loss of concrete mortar.

E. Fabricate forms for easy removal without hammering or prying against concrete surfaces. Provide crush or wrecking plates where stripping may damage cast concrete surfaces. Provide top forms for inclined surfaces steeper than 1.5 horizontal to 1 vertical.

1. Install keyways, reglets, recesses, and the like, for easy removal.

2. Do not use rust-stained steel form-facing material.

F. Set edge forms, bulkheads, and intermediate screed strips for slabs to achieve required elevations and slopes in finished concrete surfaces. Provide and secure units to support screed strips; use strike-off templates or compacting-type screeds.

G. Chamfer corners and edges of permanently exposed concrete where indicated on the Project Drawings.

H. Form openings, chases, offsets, sinkages, keyways, reglets, blocking, screeds, and bulkheads required in the Work. Determine sizes and locations from trades providing such items.

I. Clean forms and adjacent surfaces to receive concrete. Remove chips, wood, sawdust, dirt, and other debris just before placing concrete.

J. Retighten forms and bracing before placing concrete, as required, to prevent mortar leaks and maintain proper alignment.

K. Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions, before placing reinforcement.

3.2 EMBEDDED ITEMS

A. Place and secure anchorage devices and other embedded items required for adjoining work that is attached to or supported by cast-in-place concrete. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

B. Accurately position and securely anchor in forms: anchor bolts; formed openings; pipe wall sleeves; reinforcement; waterstops; steel plates and angles (if required); and other anchorages and materials to be embedded in concrete as shown on the Project Drawings.

C. Cast In Place Anchor Bolts:

1. Unless installed in pipe sleeves, provide sufficient threads on anchor bolts to permit a nut on the concrete side of the form or template.

2. Install a second nut on the other side of the form or template.

3. Adjust the nuts to hold the bolt rigidly in the proper position.

D. Clean embedments before installation.

E. Clean concrete spatter and other foreign substances from surfaces not in contact with concrete.

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3.3 REMOVING AND REUSING FORMS

A. General: Formwork for sides of beams, walls, columns, and similar parts of the Work that does not support weight of concrete may be removed after cumulatively curing at not less than 50 deg F for 24 hours after placing concrete. Concrete has to be hard enough to not be damaged by form-removal operations and curing and protection operations need to be maintained.

1. Leave formwork for beam soffits, joists, elevated slabs, and other structural elements that supports weight of concrete in place until concrete has achieved at least 70 percent of its 28-day design compressive strength.

2. Remove forms only if shores have been arranged to permit removal of forms without loosening or disturbing shores.

B. Clean and repair surfaces of forms to be reused in the Work. Split, frayed, delaminated, or otherwise damaged form-facing material will not be acceptable for exposed surfaces. Apply new form-release agent.

C. When forms are reused, clean surfaces, remove fins and laitance, and tighten to close joints. Align and secure joints to avoid offsets. Do not use patched forms for exposed concrete surfaces unless approved by Architect.

3.4 STEEL REINFORCEMENT

A. General: Comply with CRSI's "Manual of Standard Practice" for placing reinforcement.

1. Do not cut or puncture vapor retarder. Repair damage and reseal vapor retarder before placing concrete.

B. Clean reinforcement of loose rust and mill scale, earth, ice, and other foreign materials that would reduce bond to concrete.

C. Coordinate placement of reinforcing steel with formwork, formed openings, and other work.

D. Accurately position, support, and secure reinforcement against displacement. Locate and support reinforcement with bar supports to maintain minimum concrete cover. Do not tack weld crossing reinforcing bars.

1. Welding of reinforcement is not permitted without prior approval of the Contracting Office and Structural Engineer of Record.

E. Verify requirements and compliance for concrete cover over reinforcement.

F. Set wire ties with ends directed into concrete, not toward exposed concrete surfaces.

G. Install welded wire reinforcement in longest practicable lengths on bar supports spaced to minimize sagging. Lap edges and ends of adjoining sheets at least one mesh spacing. Offset laps of adjoining sheet widths to prevent continuous laps in either direction. Lace overlaps with wire.

H. Ensure all embedded parts are placed and tied to reinforcement before placing additional bars, to ensure adequate placement and connections.

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I. Lap splices shall have a minimum two ties per spliced length.

J. Accurately position reinforcing steel on supports, spacers, hangers, or other reinforcing steel at maximum intervals of 4 feet on center.

K. Reinforcing bars shall be secured with wire ties or suitable clips. Tie 50 percent of all reinforcement and reinforcement at intersections for all wall and floor construction.

L. All dowels, anchorages, formwork for openings, pipe sleeves, bearing plates and angles, and other embedments shall be secured in place and tied to reinforcement, before depositing concrete.

Embedments shall be securely tied to not deviate from required position.

M. Dowel all vertical wall reinforcement to foundations. Securely tie all rebar, including dowels in location before placing concrete or grout. “Stabbing” of bars into poured concrete is not permitted.

N. Except at contact splices, minimum clear distances between bars to be the greater of:

1. Nominal diameter of bars

2. 1.5 times maximum size of aggregate

3. 3 inch in other locations

O. Where reinforcement is placed in 2 layers, place bars in upper layer, directly above bars in lower layer.

P. Do not use brick or porus material to support footing or slab steel off the ground.

Q. Reinforcement with kinks or improper bends shall not be used. Reinforcement shall not be bent or straightened in a manner that will injure the material. Reinforcing bars partially embedded in hardened concrete shall not be field bent except for realignment up to a 30 degree bend, and shall only be bent once.

R. Splices:

1. Splices to be as specified on the project drawings.

2. Splices at other locations may be acceptable, if approved by the Contracting Officer.

3. Do not weld or tack weld reinforcing steel except if approved by the Contracting Officer and Structural Engineer of Record.

4. Remove and replace steel upon which any unauthorized welding has been performed.

3.5 JOINTS

A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.

B. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by Architect.

1. Place joints perpendicular to main reinforcement. Continue reinforcement across construction joints unless otherwise indicated. Do not continue reinforcement through sides of strip placements of floors and slabs.

2. Space vertical joints in walls as indicated.

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3. Use a bonding agent at locations where fresh concrete is placed against hardened or partially hardened concrete surfaces.

4. Use epoxy-bonding adhesive at locations where fresh concrete is placed against hardened or partially hardened concrete surfaces.

C. Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to one-fourth of concrete thickness – or as indicated on the Project Drawings, as follows:

1. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint to a radius of 1/8 inch. Repeat grooving of contraction joints after applying surface finishes. Eliminate groover tool marks on concrete surfaces.

2. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch - wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks.

D. Isolation Joints in Slabs-on-Grade: After removing formwork, install joint-filler strips at slab junctions with vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

1. Terminate full-width joint-filler strips as indicated on the Project drawings - though not less than 1/2 inch or more than 1 inch below finished concrete surface where joint sealants, are indicated.

2. Install joint-filler strips in lengths as long as practicable. Where more than one length is required, lace or clip sections together.

3.6 TRANSPORTING MIXED CONCRETE

A. Transporting of mixed concrete shall conform to ACI 304R – Guide for Measuring, Mixing, Transporting and Placing concrete; & ASTM C94 – Standard Specification for Ready-Mixed Concrete.

B. Do not exceed manufacturer’s guaranteed capacity of truck agitators. Maintain the mixed concrete in a thoroughly mixed and uniform mass during hauling.

C. Do not incorporate additional mixing water into the concrete during hauling or after arrival at the delivery point, unless ordered by the Contractor & approved by the Contracting Officer. If additional water is approved to be incorporated into the concrete, revolve the drum not less than 30 revolutions at mixing speed after the water is added and before placing the concrete.

D. Furnish a water measuring device in good working condition, mounted on each transit mix truck, for measuring the water added to the mix on the site, if approved by the Contractor and Contracting Officer.

E. Provide delivery ticket and comply with delivery requirements.

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3.7 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections have been performed.

B. Do not add water to concrete during delivery, at Project site, or during placement unless approved by Contracting Officer.

C. Before test sampling and placing concrete, water may be added at Project site, subject to limitations of ACI 301, and subject to the approval of the Contracting Officer.

1. Do not add water to concrete after adding high-range water-reducing admixtures to mixture.

D. Provide the Contracting Officer 24 hours to complete inspection between finishing form work and scheduled time of concrete placement.

E. Predetermine limits at each pour as indicated on the drawings, and place all concrete within limits of pour in one continuous operation. Cold joints are not allowed unless identified on the drawings or approved by the Contracting Officer. Do not interrupt successive placement or permit cold joints to occur where not approved.

F. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete will be placed on concrete that has hardened enough to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints if approved by the Contracting Officer. Deposit concrete to avoid segregation.

1. Deposit concrete in horizontal layers of depth to not exceed formwork design pressures and in a manner to avoid inclined construction joints.

2. Consolidate placed concrete with mechanical vibrating equipment according to ACI 301.

3. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mixture constituents to segregate.

G. Deposit and consolidate concrete for floors and slabs in a continuous operation, within limits of construction joints, until placement of a panel or section is complete.

1. Consolidate concrete during placement operations so concrete is thoroughly worked around reinforcement and other embedded items and into corners.

2. Maintain reinforcement in position on chairs during concrete placement.

3. Screed slab surfaces with a straightedge and strike off to correct elevations.

4. Slope surfaces uniformly to drains where required.

5. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane, before excess bleedwater appears on the surface. Do not further disturb slab surfaces before starting finishing operations.

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H. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

1. When average high and low temperature is expected to fall below 40 deg F (4.4 deg C) for three successive days, maintain delivered concrete mixture temperature within the temperature range required by ACI 301.

2. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or on subgrade containing frozen materials.

3. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise specified and approved in mixture designs.

4. Minimum concrete temperature at time of mixing:

a. When the Outdoor Temperature is below 30 degrees Fahrenheit: Concrete

Temperature at mixing to be: 70 degrees Fahrenheit.

b. When the Outdoor Temperature is between 30 degrees and 45 degrees Fahrenheit:

Concrete Temperature at mixing to be: 60 degrees Fahrenheit.

5. Do not place heated concrete that is warmer than 80 degrees Fahrenheit.

6. If freezing temperatures are expected during curing, maintain the concrete temperature at or above 50 degrees Fahrenheit for 5 days or 70 degrees Fahrenheit for 3 days with forms in place.

7. Do not allow concrete to cool suddenly

8. Do not water cure during cold weather. Use membrane curing compound, if approved by the Contracting Officer.

I. Hot-Weather Placement: Comply with ACI 305 and as follows:

1. Maintain concrete temperature below 90 deg F (32 deg C) at time of placement. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water. Using liquid nitrogen to cool concrete is Contractor's option.

2. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete. Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

3. Do not allow concrete temperature to exceed 70 degrees Fahrenheit at placement.

4. Prevent plastic shrinkage cracking due to rapid evaporation of moisture.

5. Do not place concrete when the actual or anticipated evaporation rate equals or exceeds 0.2 pounds per square foot per hour as determined from ACI 305, Fig. 2.1.4.

J. Prepare previously placed concrete by cleaning with steel brush or sandblasting and applying bonding agent in accordance with manufacturer’s instructions.

K. Concrete cold joints to have additional concrete placement must have the joining surface intentionally roughened by raking or other means to a depth of ¼ inch prior to additional concrete placement.

L. In locations where new concrete is doweled to existing work, drill holes in existing concrete, and insert dowels with epoxy resin system as specified on the project drawings. Epoxy dowels are allowed only at locations indicated on the project drawings.

M. Rigidly secure forms, reinforcing steel, embedment, and anchor bolts in proper position prior to placing concrete. Ensure reinforcement, inserts, embedded parts, and mechanical or electrical embeds are not disturbed during concrete placement.

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N. Remove all mud, water, ice, snow, frozen material, and debris from space to be occupied by concrete.

O. Clean surfaces encrusted with dried concrete from previous concrete operations.

P. Convey to the point of final deposit by methods that will prevent separation or loss of ingredients.

Q. Place concrete in final position without being moved laterally more than 5 feet.

R. Place concrete in approximately horizontal layers of proper depth for proper compaction, not more than 2 feet. Concrete shall not be allowed to drop freely more than 4 feet or through a cage of reinforcing steel.

S. After concreting is started, it shall be carried on as a continuous operation until each pour is complete as indicated by construction joints shown on the drawings. Ensure to place subsequent layer while the preceding layer is still plastic.

T. All concrete shall be thoroughly consolidated by suitable means during placement and shall be thoroughly worked around reinforcement and embedded fixtures, and into corners of forms. Use of vibrating equipment to move concrete horizontally is not permitted.

U. Remove all laitance, debris, and surplus water from the tops of the forms by screeding, scraping or other effective means.

3.8 BONDING TO HARDENED CONCRETE

A. Place new concrete on rough, clean, damp faces of existing concrete.

B. All laitance and other unsound material shall be removed before additional concrete is placed against hardened concrete.

C. Remove surface mortar to expose aggregate.

D. Clean hardened concrete of all foreign substances, including curing compound, washed with clean water, and keep saturated 24 hours preceding placement of fresh concrete.

E. Apply epoxy bonding agent for bonding to hardened concrete.

3.9 FINISHING FORMED SURFACES

A. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes and defects repaired and patched. Remove fins and other projections that exceed specified limits on formed-surface irregularities.

1. Apply to concrete surfaces below grade, or not exposed to public view.

B. Remove fins and other surface projections from all formed surfaces except exterior surfaces that will be in contact with earth backfill and are not specified to be dampproofed.

C. Use a power grinder if necessary to remove projections and provide a smooth flush finish.

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D. Fill tie holes with epoxy grout.

1. At form tie locations; the tie holes shall be thoroughly cleaned,…