PC 501-18130-047 FOR CONSTRUCTION PROJECT MANUAL Volume II 2024-11-01.pdf

IFB # 159297

FOR CONSTRUCTION

PROJECT MANUAL – VOLUME 2

for

VIRGINIA DEPARTMENT OF TRANSPORTATION

STANARDSVILLE AREA HEADQUARTERS

Project Code No. 501-18130-047

November 1, 2024

VAE Project No. 23021

1115 Vista Park Drive Forest, Virginia 24551

(434) 316-6001 – Phone

(434) 316-6002 – Facsimile www.virginia-ae.com

VIRGINIA DEPT. OF TRANSPORTATION PROJECT CODE NO. 501-18130-047

VIRGINIA A&E 23021

REFER TO PROJECT MANUAL - VOLUME 1

FOR ADDITIONAL SPECIFICATIONS

VIRGINIA A&E 23021 TABLE OF CONTENTS VOLUME 2 / 1

VIRGINIA DEPARTMENT OF TRANSPORTATION

Stanardsville Area Headquarters Project Code No. 501-18130-047

IFB # 159297

TABLE OF CONTENTS – VOLUME 2

VIRGINIA A&E 23021 TABLE OF CONTENTS VOLUME 2 / 2

APPENDIX A – PROTOTYPE COMBINATION OFFICE & MAINTENANCE BUILDING - 20 OR

LESS AHQ STAFF PROJECT MANUAL (PC- 501-B1501-034)

APPENDIX B – PROTOTYPE COMBINATION OFFICE & MAINTENANCE BUILDING

REVISED AIRFLOW RATE SCHEDULE AND HVAC UNIT SELECTION

APPENDICES (Cont’d)

APPENDIX C – SECTION 133421 – FRAME-SUPPORTED MEMBRANE BUILDING (VDOT

PROTOTYPE CHEMICAL STORAGE BUILDINGS PROTOTYPE DESIGN

PROJECT CODE: 501-B1501-032) DATED 10/24/2024

APPENDIX D – GEOTECHINICAL ENGINEERING REPORT

APPENDIX E – EQUIPMENT STORAGE BUILDING UL DESIGN ASSEMBLIES

APPENDIX F – EQUIPMENT STORAGE BUILDING ATTIC VENTILATION CALCULATIONS

APPENDIX G – AHQ PLUMBING FIXTURE CALCULATIONS

APPENDIX H – AHQ PARKING CALCULATIONS

APPENDIX I – HAZARDOUS MATERIAL REPORTS FOR ASBESTOS AND LEAD

END OF TABLE OF CONTENTS

VIRGINIA A&E 23021 APPENDIX A

APPENDIX A

PROTOTYPE COMBINATION OFFICE & MAINTENANCE

BUILDING – 20 OR LESS AHQ STAFF

PROJECT MANUAL

(PC 501-B1504-034)

FOR CONSTRUCTION

PROJECT MANUAL

for

VIRGINIA DEPARTMENT OF TRANSPORTATION

PROTOTYPE COMBINATION OFFICE & MAINTENANCE

BUILDING – 20 OR LESS AHQ STAFF

Project Code No. 501-B1501-034

FOR STATEWIDE SITE ADAPTATION

August 8, 2022

VAE Project No. 21057

1115 Vista Park Drive Forest, Virginia 24551

(434) 316-6001 – Phone

(434) 316-6002 – Facsimile www.virginia-ae.com

VIRGINIA DEPT. OF TRANSPORTATION PROJECT CODE NO. 501-B1501-034

PROTOTYPE COMBINATION OFFICE & MAINTENANCE BLDG - 20 OR LESS AHQ STAFF

VIRGINIA A&E 21057 TABLE OF CONTENTS / 1

VIRGINIA DEPARTMENT OF TRANSPORTATION

Prototype Combination Office & Maintenance Building –

20 or Less AHQ Staff Project Code No. 501-B1501-034

TABLE OF CONTENTS

Site Adaptation Design shall provide project specific bid documents, DGS forms and site adaptation documents which may include, but not be limited to site work specifications, Geotechnical Investigative Report, Asbestos Inspection Report, Lead Inspection Report, CO-6a (DGS-30-048), and revised CO-6b to accommodate inspections for other construction associated with the specific site adaptation project along with the minimum required inspections listed on attached CO-6b.

LIST OF DRAWINGS

T1 TITLE SHEET

FP1 FIRE PROTECTION INFORMATION PLAN

A1 LEGEND AND SCHEDULES

A2 FLOOR PLAN

A3 REFLECTED CEILING AND ROOF PLANS AND DETAILS

A4 ELEVATIONS

A5 BUILDING SECTIONS AND DETAILS

A6 WALL SECTIONS

A7 DETAILS

A8 WALL TYPES AND HEAD AND JAMB DETAILS

A9 DOOR, FRAME, AND WINDOW TYPES AND SECTIONS

VIRGINIA A&E 21057 TABLE OF CONTENTS / 2

LIST OF DRAWINGS (Cont’d)

A10 ENLARGED PLAN, ELEVATIONS, AND SECTIONS

A11 ELEVATIONS, SECTIONS, AND DETAILS

A12 OPTIONAL PLANS AND DETAILS

S1 FOUNDATION AND SLAB PLAN

S2 STEEL FRAMING PLAN

S3 ROOF FRAMING PLAN

S4 SECTIONS AND DETAILS

S5 SECTIONS AND DETAILS

S6 ELEVATIONS AND DETAILS

S7 ROOF TRUSS PROFILES, SECTIONS, AND DETAILS

S8 SCHEDULE, SECTIONS, DETAILS, and OPTIONAL PLANS

S9 GENERAL NOTES

M1 LEGEND AND SPECIFICATIONS

M2 MECHANICAL PLAN & OPTIONAL PLAN

M3 SCHEDULES

M4 SECTIONS

M5 DETAILS

M6 CONTROLS

P1 LEGEND, SPECIFICATIONS, AND DETAILS

P2 SANITARY PLAN & OPTIONAL PLAN

P3 DOMESTIC WATER PLAN

P4 PLUMBING SCHEDULES

P5 PLUMBING RISER DIAGRAMS

E1 LEGEND, ABBREVIATIONS, AND GENERAL NOTES

E2A SINGLE LINE DIAGRAM - 120/240V, SINGLE PHASE

E2B SINGLE LINE DIAGRAM - 208/120V, 3 PHASE

E3 FLOOR PLAN - LIGHTING

E4 FLOOR PLAN - POWER

E5 ENLARGED PLAN AND OPTIONAL PLANS

E6 GROUNDING AND EMBED PLAN

E7 LIGHTNING PROTECTION SYSTEM

E8 DETAILS

E9 DETAILS

E10A SCHEDULES - 120/240V, SINGLE PHASE

E10B SCHEDULES - 208/120V, 3 PHASE

E11 SCHEDULES

E12 SCHEMATICS

E13 SCHEMATICS

E14 ENLARGED LIGHTING CONTROL PLANS

TECHNICAL SPECIFICATIONS

DIVISION 01 - GENERAL REQUIREMENTS

Specifications not included. Refer to Site Adaptation Division 01 specifications.

DIVISION 03 - CONCRETE

032000 Concrete Reinforcing 032000/1 – 032000/4 033000 Cast-in-Place Concrete 033000/1 – 033000/18 033543 Polished Concrete Finishing 033543/1 – 033543/3

DIVISION 04 - MASONRY

042000 Unit Masonry 042000/1 – 042000/17

VIRGINIA A&E 21057 TABLE OF CONTENTS / 3

TECHNICAL SPECIFICATIONS (Cont’d)

DIVISION 05 - METALS

051200 Structural Steel Framing 051200/1 – 051200/7 054000 Cold-Formed Metal Framing 054000/1 – 054000/9 054400 Cold-Formed Metal Trusses 054400/1 – 054400/6

DIVISION 06 - WOOD, PLASTICS, AND COMPOSITES

061053 Miscellaneous Rough Carpentry 061053/1 – 061053/5 061600 Sheathing 061600/1 – 061600/7 064116 Plastic-Laminate-Clad Architectural Cabinets 064116/1 – 064116/6 066640 Exterior Column Wrap Systems 066640/1 – 066640/4

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

072100 Thermal Insulation 072100/1 – 072100/5 072119 Foamed-in-Place Insulation 072119/1 – 072119/2 072500 Weather Barriers 072500/1 – 072500/3 072726 Fluid-Applied Membrane Air Barriers 072726/1 – 072726/10 073113 Asphalt Shingles 073113/1 – 073113/10 074646 Fiber-Cement Siding 074646/1 – 074646/4 076200 Sheet Metal Flashing and Trim 076200/1 – 076200/10 076510 Flexible Flashing Drainage Plane System 076510/1 – 076510/5 077100 Roof Specialties 077100/1 – 077100/7 079200 Joint Sealants 079200/1 – 079200/7

DIVISION 08 - OPENINGS

081113 Hollow Metal Doors and Frames 081113/1 – 081113/7 081416 Flush Wood Doors 081416/1 – 081416/5 083323 Overhead Coiling Doors 083323/1– 083323/8 084113 Aluminum-Framed Entrances and Storefronts 084113/1 – 084113/10 085113 Aluminum Windows 085113/1 – 085113/6 087100 Door Hardware 087100/1 – 087100/12 088000 Glazing 088000/1 – 088000/12

DIVISION 09 - FINISHES

092216 Non-Structural Metal Framing 092216/1 – 092216/5 092900 Gypsum Board 092900/1 – 092900/8 093013 Ceramic Tiling 093013/1 – 093013/7 095113 Acoustical Panel Ceilings 095113/1 – 095113/6 096513 Resilient Base and Accessories 096513/1 – 096513/4 099113 Exterior Painting 099113/1 – 099113/5 099123 Interior Painting 099123/1 – 099123/6

DIVISION 10 - SPECIALTIES

101423 Room-Identification Signage 101423/1 – 101423/5 102113 Plastic Toilet Compartments 102113/1 –102113/5 102800 Toilet, Bath, and Laundry Accessories 102800/1 – 102800/6 104416 Fire Extinguishers 104416/1 – 104416/2 105113 Metal Lockers 105113/1 – 105113/7

DIVISION 11 - EQUIPMENT

113013 Appliances 113013/1 – 113013/7

DIVISION 12 - FURNISHINGS

122413 Roller Window Shades 122413/1 – 122413/5

123661.16 Solid Surfacing Countertops 123661.16/1 – 123661.16/4

VIRGINIA A&E 21057 TABLE OF CONTENTS / 4

TECHNICAL SPECIFICATIONS (Cont’d)

DIVISION 22 - PLUMBING

220517 Sleeves and Sleeve Seals for Plumbing Piping 220517/1 – 220517/2 220518 Escutcheons for Plumbing Piping 220518/1 – 220518/2 220519 Meters and Gages for Plumbing Piping 220519/1 – 220519/3

220523.12 Ball Valves for Plumbing Piping 220523.12/1 – 220523.12/3

220523.14 Check Valves for Plumbing Piping 220523.14/1 – 220523.14/4 220529 Hangers and Supports for Plumbing Piping and

Equipment 220529/1 – 220529/5

220553 Identification for Plumbing Piping and Equipment 220553/1 – 220553/3 220719 Plumbing Piping Insulation 220719/1 – 220719/7 221116 Domestic Water Piping 221116/1 – 221116/8 221119 Domestic Water Piping Specialties 221119/1 – 221119/4 221316 Sanitary Waste and Vent Piping 221316/1 – 221316/6

221319.13 Sanitary Drains 221319.13/1 – 221319.13/2

221513 General-Service Compressed-Air Piping 221513/1 – 221513/3 223400 Fuel-Fired, Domestic-Water Heaters 223400/1 – 223400/4 224100 Residential Plumbing Fixtures 224100/1 – 224100/8

224216.16 Commercial Sinks 224216.16/1 – 224216.16/5

224716 Pressure Water Coolers 224716/1 – 224716/4

DIVISION 23 - HEATING VENTILATING AND AIR CONDITIONING (HVAC)

230513 Common Motor Requirements for HVAC Equipment 230513/1 – 230513/2 230517 Sleeves and Sleeve Seals for HVAC Piping 230517/1 – 230517/1 230529 Hangers and Supports for HVAC Piping and Equipment 230529/1 – 230529/6 230553 Identification for HVAC Piping and Equipment 230553/1 – 230553/3 230593 Testing, Adjusting, and Balancing for HVAC 230593/1 – 230593/10 230713 Duct Insulation 230713/1 – 230713/10 230719 HVAC Piping Insulation 230719/1 – 230719/5 231126 Facility Gas Piping 231126/1 – 231126/9 233113 Metal Ducts 233113/1 – 233113/9 233300 Air Duct Accessories 233300/1 – 233300/6 233416 Centrifugal HVAC Fans 233416/1 – 233416/4 233423 HVAC Power Ventilators 233423/1 – 233423/4 233550 Vehicle Exhaust Extraction System 233550/1 – 233550/4 233713 Diffusers, Registers, and Grilles 233713/1 – 233713/2

235416.13 Gas-Fired Furnaces 235416.13/1 – 235416.13/7

235523.13 Low-Intensity, Gas-Fired, Radiant Heaters 235523.13/1 – 235523.13/5

DIVISION 26 - ELECTRICAL

260500 Common Work Results for Electrical 260500/1 – 260500/12 260543 Underground Ducts and Raceways for Electrical Systems 260543/1 – 260543/7 260923 Networked Lighting Controls 260923/1 – 260923/9 260924 Line Voltage Lighting Controls 260924/1 – 260924/5 262416 Panelboards 262416/1 – 262416/9 262726 Wiring Devices 262726/1 – 262726/3 262816 Enclosed Switches and Circuit Breakers 262816/1 – 262816/2 264113 Lightning Protection for Structures 264113/1 – 264113/4 264313 Surge Protection for Low-Voltage Electrical Power Circuits 264313/1 – 264313/4 265000 Building Lighting 265000/1 – 265000/4

VIRGINIA A&E 21057 TABLE OF CONTENTS / 5

TECHNICAL SPECIFICATIONS (Cont’d)

DIVISION 27 - COMMUNICATIONS

Specifications not included in Project Manual. Refer to Project Drawings for requirements where applicable.

DIVISION 28 - ELECTRONIC SAFETY AND SECURITY

280000 Telecommunications System 280000/1 – 280000/4

DIVISION 31 - EARTHWORK

Specifications not included. Refer to Site Adaptation Division 31 specifications.

DIVISION 32 - EXTERIOR IMPROVEMENTS

Specifications not included. Refer to Site Adaptation Division 32 specifications.

DIVISION 33 - UTILITIES

Specifications not included. Refer to Site Adaptation Division 33 specifications.

APPENDIX A

2018 VUSBC Special Inspections (State Owned Buildings) Form CO-6b (DGS-30-052)

APPENDIX B

Plumbing Fixture Calculations

APPENDIX C

Envelope Thermal Calculations

APPENDIX D

Attic Ventilation Calculations

END OF TABLE OF CONTENTS

VIRGINIA A&E 21057 032000 / 1

SECTION 032000 - CONCRETE REINFORCING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. Section Includes:

1. Steel reinforcement bars.

2. Welded-wire reinforcement.

1.3 ACTION SUBMITTALS

A. Product Data: For the following:

1. Each type of steel reinforcement.

2. Bar supports.

B. Shop Drawings: Comply with ACI SP-066:

1. Include placing drawings that detail fabrication, bending, and placement.

2. Include bar sizes, lengths, materials, grades, bar schedules, stirrup spacing, bent bar diagrams, bar arrangement, location of splices, lengths of lap splices, tie spacing, hoop spacing, and supports for concrete reinforcement.

C. Construction Joint Layout: Indicate proposed construction joints required to build the structure.

1. Location of construction joints is subject to approval of the Architect/Engineer.

1.4 INFORMATIONAL SUBMITTALS

A. Material Test Reports: For the following, from a qualified testing agency:

1. Steel Reinforcement:

1.5 DELIVERY, STORAGE, AND HANDLING

A. Steel Reinforcement: Deliver, store, and handle steel reinforcement to prevent bending and damage.

1. Store reinforcement to avoid contact with earth.

VIRGINIA A&E 21057 032000 / 2

PART 2 - PRODUCTS

2.1 STEEL REINFORCEMENT

A. Reinforcing Bars: ASTM A615/A615M, Grade 60, deformed.

B. Plain-Steel Welded-Wire Reinforcement: ASTM A1064/A1064M, plain, fabricated from as-drawn steel wire into flat sheets.

2.2 REINFORCEMENT ACCESSORIES

A. Joint Dowel Bars: ASTM A615/A615M, 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.

1. Manufacture bar supports from steel wire, plastic, or precast concrete in accordance with CRSI's "Manual of Standard Practice," of greater compressive strength than concrete and as follows:

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

C. Steel Tie Wire: ASTM A1064/A1064M, annealed steel, not less than 0.0508 inch in diameter.

1. Finish: Plain.

2.3 FABRICATING REINFORCEMENT

A. Fabricate steel reinforcement according to CRSI's "Manual of Standard Practice."

PART 3 - EXECUTION

3.1 PREPARATION

A. Protection of In-Place Conditions:

1. Do not cut or puncture vapor retarder.

2. 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 reduce bond to concrete.

C. Before placing concrete footings, verify electrical grounding connections to reinforcing are in place and tested.

VIRGINIA A&E 21057 032000 / 3

3.2 INSTALLATION OF STEEL REINFORCEMENT

A. Comply with CRSI's "Manual of Standard Practice" for placing and supporting reinforcement.

B. All reinforcing shall be securely wired together in accordance with CRSI’s “Placing Reinforcing Bars.”

C. Accurately position, support, and secure reinforcement against displacement.

1. Locate and support reinforcement with bar supports to maintain minimum concrete cover.

2. Do not tack weld crossing reinforcing bars.

D. Preserve clearance between bars of not less than 1 inch, not less than one bar diameter, or not less than 1-1/3 times size of large aggregate, whichever is greater.

E. Provide concrete coverage in accordance with ACI 318.

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

G. Splices: Lap splices as indicated on Drawings.

1. Bars indicated to be continuous, and all vertical bars shall be lapped not less than 48 bar diameters at splices.

2. Stagger splices in accordance with ACI 318.

H. Install welded-wire reinforcement in longest practicable lengths.

1. Support welded-wire reinforcement in accordance with CRSI "Manual of Standard Practice."

a. For reinforcement less than W4.0 or D4.0, continuous support spacing shall not exceed 12 inches.

2. Lap ends of adjoining sheets one full mesh plus 2 inches between cross wires and lap edges of adjoining sheets by overlapping selvage wires 2 inches and wiring all laps securely together.

I. Provide corner bars at all wall and footing steps and corners unless otherwise noted.

Corner bars shall be a minimum of 2’-6” x 2’-6” long and shall have the same size and spacing as the horizontal reinforcing.

J. No torch cutting, heat bending, or welding of reinforcing is permitted.

3.3 JOINTS

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

1. Place joints perpendicular to main reinforcement.

2. Continue reinforcement across construction joints unless otherwise indicated.

VIRGINIA A&E 21057 032000 / 4

3. Do not continue reinforcement through sides of strip placements of floors and slabs.

B. Doweled Joints: Install dowel bars and support assemblies at joints where indicated.

Lubricate one-half of dowel length, to prevent concrete bonding to one side of joint.

3.4 INSTALLATION TOLERANCES

A. Comply with ACI 117.

3.5 FIELD QUALITY CONTROL

A. Special Inspections: Owner will engage a qualified testing and inspecting agency to perform field tests and inspections and prepare test reports.

B. Inspections:

1. Steel-reinforcement placement.

END OF SECTION 032000

VIRGINIA A&E 21057 033000 / 1

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 Site Adaptation Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Cast-in-place concrete, including concrete materials, mixture design, placement procedures, and finishes.

B. Related Requirements:

1. Section 032000 "Concrete Reinforcing" for steel reinforcing bars and welded-wire reinforcement.

2. Section 033543 "Polished Concrete Finishing" for concrete floors scheduled to receive a polished concrete finish.

1.3 DEFINITIONS

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

B. Water/Cement Ratio (w/cm): The ratio by weight of water to cementitious materials.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Require representatives of each entity directly concerned with cast-in-place concrete to attend, including the following:

a. Contractor's superintendent.

b. Independent testing agency responsible for concrete design mixtures.

c. Ready-mix concrete manufacturer.

d. Concrete Subcontractor.

e. Special concrete finish Subcontractor.

2. Review the following:

a. Special inspection and testing and inspecting agency procedures for field quality control.

b. Construction joints, control joints, isolation joints, and joint-filler strips.

c. Semirigid joint fillers.

VIRGINIA A&E 21057 033000 / 2

d. Vapor-retarder installation.

e. Anchor rod and anchorage device installation tolerances.

f. Cold and hot weather concreting procedures.

g. Concrete finishes and finishing.

h. Curing procedures.

i. Forms and form-removal limitations.

j. Shoring and reshoring procedures.

k. Methods for achieving specified floor and slab flatness and levelness.

l. Floor and slab flatness and levelness measurements.

m. Concrete repair procedures.

n. Concrete protection.

o. Initial curing and field curing of field test cylinders (ASTM C31/C31M.)

p. Protection of field cured field test cylinders.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Design Mixtures: For each concrete mixture, include the following:

1. Mixture identification.

2. Minimum 28-day compressive strength.

3. Durability exposure class.

4. Maximum w/cm.

5. Slump limit.

6. Air content.

7. Nominal maximum aggregate size.

8. Intended placement method.

9. Submit alternate design mixtures when characteristics of materials, Project conditions, weather, test results, or other circumstances warrant adjustments.

C. Concrete Schedule: For each location of each Class of concrete indicated in "Concrete Mixtures" Article, including the following:

1. Concrete Class designation.

2. Location within Project.

3. Exposure Class designation.

4. Formed Surface Finish designation and final finish.

5. Final finish for floors.

6. Curing process.

7. Floor treatment if any.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For the following:

1. Installer: Include copies of applicable ACI certificates.

2. Ready-mixed concrete manufacturer.

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

VIRGINIA A&E 21057 033000 / 3

1. Cementitious materials.

2. Admixtures.

3. Curing compounds.

4. Floor and slab treatments.

5. Bonding agents.

6. Bond breakers.

7. Adhesives.

8. Vapor retarders.

9. Semirigid joint filler.

10. Joint-filler strips.

11. Repair materials.

C. Material Test Reports: For each applicable product.

D. Floor surface flatness and levelness measurements report, indicating compliance with specified tolerances.

1.7 QUALITY ASSURANCE

A. Installer Qualifications: A qualified installer who employs Project personnel qualified as an ACI-certified Flatwork Technician and Finisher and a supervisor who is a certified ACI Flatwork Concrete Finisher/Technician or an ACI Concrete Flatwork Technician.

1. Post-Installed Concrete Anchors Installers: ACI-certified Adhesive Anchor Installer.

B. Ready-Mixed Concrete Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C94/C94M requirements for production facilities and equipment.

1. Manufacturer certified in accordance with NRMCA's "Certification of Ready Mixed Concrete Production Facilities."

C. Mockups: Cast concrete slab-on-ground panels to demonstrate typical joints, surface finish, texture, tolerances, floor treatments, and standard of workmanship.

1. Slab-On-Ground: Build panel approximately 10 feet by 10 feet in the location indicated or, if not indicated, as directed by Architect/Engineer.

a. Divide panel into four equal panels to demonstrate saw joint cutting.

2. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

1.8 DELIVERY, STORAGE, AND HANDLING

A. Comply with ASTM C94/C94M and ACI 301.

1.9 FIELD CONDITIONS

A. Cold-Weather Placement: Comply with ACI 301 and ACI 306.1 and as follows.

VIRGINIA A&E 21057 033000 / 4

1. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

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

3. Do not use frozen materials or materials containing ice or snow.

4. Do not place concrete in contact with surfaces less than 35 deg F.

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

B. Hot-Weather Placement: Comply with ACI 301 and ACI 305.1, and as follows:

1. Maintain concrete temperature at time of discharge to not exceed 95 deg F.

2. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete.

Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

PART 2 - PRODUCTS

2.1 CONCRETE, GENERAL

A. ACI Publications: Comply with ACI 301unless modified by requirements in the Contract Documents.

2.2 CONCRETE MATERIALS

A. Source Limitations:

1. Obtain each type or class of cementitious material of the same brand from the same manufacturer's plant.

2. Obtain aggregate from single source.

3. Obtain each type of admixture from single source from single manufacturer.

4. Obtain sand or fine aggregate from single source from single manufacturer.

B. Cementitious Materials:

1. Portland Cement: ASTM C150/C150M, Type I/II, gray.

2. Fly Ash: ASTM C618, Class C or F.

3. Slag Cement: ASTM C989/C989M, Grade 100 or 120.

4. Blended Hydraulic Cement: ASTM C595/C595M, Type IL, portland-limestone cement.

5. Silica Fume: ASTM C1240 amorphous silica.

C. Normal-Weight Aggregates: ASTM C33/C33M, Class 3S coarse aggregate or better, graded. Provide aggregates from a single source.

1. Maximum Coarse-Aggregate Size: 3/4 inch nominal for concrete to receive polished finish, and 1 inch nominal for all other concrete.

2. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement.

D. Air-Entraining Admixture: ASTM C260/C260M.

VIRGINIA A&E 21057 033000 / 5

E. Chemical Admixtures: Certified by manufacturer to be compatible with other admixtures that do 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 C494/C494M, Type A.

2. Retarding Admixture: ASTM C494/C494M, Type B.

3. Water-Reducing and -Retarding Admixture: ASTM C494/C494M, Type D.

4. Plasticizing and Retarding Admixture: ASTM C1017/C1017M, Type II.

5. Non-Set-Accelerating Corrosion-Inhibiting Admixture: Commercially formulated, non-set-accelerating, anodic inhibitor or mixed cathodic and anodic inhibitor;

capable of forming a protective barrier and minimizing chloride reactions with steel reinforcement in concrete.

F. Water: ASTM C94/C94M, potable.

2.3 LIQUID FLOOR TREATMENTS

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.

2.4 CURING MATERIALS

A. Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

B. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. when dry.

C. Moisture-Retaining Cover: ASTM C171, polyethylene film burlap-polyethylene sheet.

D. Water: Potable.

E. Clear, Waterborne, Membrane-Forming, Curing Compound: ASTM C309, Type 1, Class B, 18 to 25 percent solids, nondissipating.

F. Clear, Waterborne, Membrane-Forming, Curing and Sealing Compound: ASTM C1315, Type 1, Class A.

2.5 RELATED MATERIALS

A. Expansion- and Isolation-Joint-Filler Strips: ASTM D1751, asphalt-saturated cellulosic fiber.

B. Semirigid Joint Filler: Two-component, semirigid, 100 percent solids, in accordance with ASTM D2240. Confirm compatibility with flooring, sealing, and curing manufacturing.

C. Bonding Agent: ASTM C1059/C1059M, Type II, nonredispersible, acrylic emulsion or styrene butadiene.

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D. Epoxy Bonding Adhesive: ASTM C881, two-component epoxy resin, capable of humid curing and bonding to damp surfaces, of class suitable for application temperature and of grade and class to suit requirements, and as follows:

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

2.6 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, in accordance with ACI 301.

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

B. Cementitious Materials: Limit percentage, by weight, of cementitious materials other than portland cement in concrete as follows:

1. Fly Ash or Other Pozzolans: 20 percent by mass.

2. Slag Cement: 45 percent by mass.

3. Silica Fume: 10 percent by mass.

4. Total of Fly Ash or Other Pozzolans, Slag Cement, and Silica Fume: 45 percent by mass, with fly ash or pozzolans not exceeding 20 percent by mass and silica fume not exceeding 10 percent by mass.

C. Admixtures: Use admixtures in accordance with manufacturer's written instructions.

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

2.7 CONCRETE MIXTURES

A. Class A: Normal-weight concrete used for footings.

1. Exposure Class: ACI 318 F1.

2. Minimum Compressive Strength: 3500 psi at 28 days.

3. Maximum w/cm: 0.55.

4. Slump Limit: 3 inches, plus or minus 1 inch. When a Type I or II plasticizing admixture conforming to ASTM C1017/C1017M or a Type F or G high-range water-reducing admixture conforming to ASTM C494/C494M is permitted to increase the slump of concrete, a maximum slump of 8 inches at the point of delivery after the admixture is added is permitted, unless otherwise specified.

5. Air Content:

a. Exposure Class F1: 4.5 percent, plus or minus 1.5 percent at point of delivery for concrete containing 1-inch nominal maximum aggregate size.

B. Class B: Normal-weight concrete used for interior slabs to receive troweled finish:

1. Exposure Class: ACI 318 F1.

2. Minimum Compressive Strength: 4000 psi at 28 days.

3. Maximum w/cm: 0.50.

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4. Slump Limit: 3 inches, plus or minus 1 inch. When a Type I or II plasticizing admixture conforming to ASTM C1017/C1017M or a Type F or G high-range water-reducing admixture conforming to ASTM C494/C494M is permitted to increase the slump of concrete, a maximum slump of 8 inches at the point of delivery after the admixture is added is permitted, unless otherwise specified.

5. Air Content:

a. Do not use an air-entraining admixture or allow total air content to exceed 3 percent for concrete used in trowel-finished floors.

C. Class C: Normal-weight concrete used for interior slabs to receive polished finish.

1. Mix shall be designed by a concrete manufacturer experienced in polished floor mix design after consultation with polished concrete finisher subcontractor.

2. Exposure Class: ACI 318 F0.

3. Minimum Compressive Strength: 4000 psi at 28 days.

4. Maximum w/cm: 0.50.

5. Slump Limit: 3 inches, plus or minus 1 inch. When a Type I or II plasticizing admixture conforming to ASTM C1017/C1017M or a Type F or G high-range water-reducing admixture conforming to ASTM C494/C494M is permitted to increase the slump of concrete, a maximum slump of 8 inches at the point of delivery after the admixture is added is permitted, unless otherwise specified.

6. Air Content:

a. Do not use an air-entraining admixture or allow total air content to exceed 3 percent for concrete used in trowel-finished floors.

D. Class D: Normal-weight concrete used for exterior concrete and walls.

1. Exposure Class: ACI 318 F3.

2. Minimum Compressive Strength: 5000 psi at 28 days.

3. Maximum w/cm: 0.40.

4. Slump Limit: 3 inches, plus or minus 1 inch. When a Type I or II plasticizing admixture conforming to ASTM C1017/C1017M or a Type F or G high-range water-reducing admixture conforming to ASTM C494/C494M is permitted to increase the slump of concrete, a maximum slump of 8 inches at the point of delivery after the admixture is added is permitted, unless otherwise specified.

5. Air Content:

a. Exposure Classes F2 and F3: 6 percent, plus or minus 1.5 percent at point of delivery for concrete containing 1-inch nominal maximum aggregate size.

2.8 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete in accordance with ASTM C94/C94M and ASTM C1116/C1116M and furnish batch ticket information.

B. When air temperature is above 90deg F, reduce mixing and delivery time to 60 minutes.

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PART 3 - EXECUTION

3.1 EXAMINATION

A. Verification of Conditions:

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

2. Do not proceed until unsatisfactory conditions have been corrected.

3.2 INSTALLATION OF 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.

1. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

2. Install anchor rods, accurately located, to elevations required and complying with tolerances in Section 7.5 of ANSI/AISC 303.

3.3 JOINTS

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

B. Construction Joints: Coordinate with concrete placement sequence.

1. Install so strength and appearance of concrete are not impaired, at locations indicated on Drawings or as approved by Architect/Engineer.

2. Place joints perpendicular to main reinforcement.

a. Continue reinforcement across construction joints unless otherwise indicated.

b. Do not continue reinforcement through sides of strip placements of floors and slabs.

3. Form keyed joints as indicated. Embed keys at least 1-1/2 inches into concrete.

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

C. Control Joints in Slabs-on-Ground: Form weakened-plane control joints, sectioning concrete into areas as indicated on Drawings, with maximum spacing of 15 feet on center unless otherwise indicated. Construct control joints for a depth according to Drawings, and as follows:

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

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D. Isolation Joints in Slabs-on-Ground: 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. Extend joint-filler strips full width and depth of joint, terminating flush with finished concrete surface unless otherwise indicated on Drawings.

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

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

E. Doweled Joints:

1. Install dowel bars and support assemblies at joints where indicated on Drawings.

2. Lubricate one-half of dowel bar length to prevent concrete bonding to one side of joint.

3.4 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, embedded items, and vapor retarder is complete and that required inspections are completed.

B. Notify Architect/Engineer and testing and inspection agencies 24 hours prior to commencement of concrete placement.

C. Do not add water to concrete during delivery, at Project site, or during placement unless approved by Architect/Engineer in writing, but not to exceed the amount indicated on the concrete delivery ticket.

D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete is placed on concrete that has hardened enough to cause seams or planes of weakness.

1. If a section cannot be placed continuously, provide construction joints as indicated.

2. Deposit concrete to avoid segregation.

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

4. Consolidate placed concrete with mechanical vibrating equipment in accordance with ACI 301.

a. Do not use vibrators to transport concrete inside forms.

b. Insert and withdraw vibrators vertically at uniformly spaced locations to rapidly penetrate placed layer and at least 6 inches into preceding layer.

c. Do not insert vibrators into lower layers of concrete that have begun to lose plasticity.

d. 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.

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E. 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. Do not place concrete floors and slabs in a checkerboard sequence.

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

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

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

5. Level concrete, cut high areas, and fill low areas.

6. Slope surfaces uniformly where required.

7. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane, before excess bleedwater appears on the surface.

8. Do not further disturb slab surfaces before starting finishing operations.

F. Chamfer exposed edges of concrete 3/4 inches, unless otherwise noted.

3.5 FINISHING FORMED SURFACES

A. As-Cast Surface Finishes:

1. ACI 301 Surface Finish SF-2.0: As-cast concrete texture imparted by form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams.

a. Patch voids larger than 3/4 inch wide or 1/2 inch deep.

b. Remove projections larger than 1/4 inch.

c. Patch tie holes.

d. Surface Tolerance: ACI 117 Class B.

e. Locations: Apply to concrete surfaces to receive a rubbed finish.

B. Rubbed Finish: Apply the following to as cast surface finishes exposed to public view:

1. Grout-Cleaned Rubbed Finish:

a. Clean concrete surfaces after contiguous surfaces are completed and accessible.

b. Do not clean concrete surfaces as Work progresses.

c. Mix 1 part portland cement to 1-1/2 parts fine sand, complying with

ASTM C144 or ASTM C404, by volume, with sufficient water to produce a mixture with the consistency of thick paint. Add white portland cement in amounts determined by trial patches, so color of dry grout matches adjacent surfaces.

d. Wet concrete surfaces.

e. Scrub grout into voids and remove excess grout. When grout whitens, rub surface with clean burlap, and keep surface damp by fog spray for at least 36 hours.

C. Related Unformed Surfaces:

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1. At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a color and texture matching adjacent formed surfaces.

2. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces unless otherwise indicated.

3.6 FINISHING FLOORS AND SLABS

A. Comply with ACI 302.1R recommendations for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

B. Float Finish:

1. When bleedwater sheen has disappeared and concrete surface has stiffened sufficiently to permit operation of specific float apparatus, consolidate concrete surface with power-driven floats or by hand floating if area is small or inaccessible to power-driven floats.

2. Repeat float passes and restraightening until surface is left with a uniform, smooth, granular texture and complies with ACI 117 tolerances for conventional concrete.

3. Apply float finish to surfaces to receive trowel finish.

C. Trowel Finish:

1. After applying float finish, apply first troweling and consolidate concrete by hand or power-driven trowel.

2. Continue troweling passes and restraighten until surface is free of trowel marks and uniform in texture and appearance.

3. Grind smooth any surface defects that would telegraph through applied coatings.

4. Do not add water to concrete surface.

5. Do not apply hard-troweled finish to concrete, which has a total air content greater than 3 percent.

6. Apply a trowel finish to surfaces exposed to view.

7. Finish surfaces to the following tolerances, in accordance with ASTM E1155, for a randomly trafficked floor surface:

a. Slabs on Ground:

1) Specified Overall Value (SOV): FF 50 and FL 35 with minimum local value (MLV): FF 45 and FL 30.

D. Broom Finish: Apply a broom finish to exterior concrete.

1. Immediately after float finishing, slightly roughen trafficked surface by brooming with fiber-bristle broom perpendicular to main traffic route.

2. Coordinate required final finish with Architect/Engineer before application.

3.7 INSTALLATION OF MISCELLANEOUS CONCRETE ITEMS

A. Filling In:

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1. Fill in holes and openings left in concrete structures after Work of other trades is in place unless otherwise indicated.

2. Mix, place, and cure concrete, as specified, to blend with in-place construction.

3. Provide other miscellaneous concrete filling indicated or required to complete the

Work.

3.8 CONCRETE CURING

A. Protect freshly placed concrete from premature drying and excessive cold or hot temperatures.

1. Comply with ACI 301 and ACI 306.1 for cold weather protection during curing.

2. Comply with ACI 301 and ACI 305.1 for hot-weather protection during curing.

B. Curing Formed Surfaces: Comply with ACI 308.1 as follows:

1. Cure formed concrete surfaces.

2. If forms remain during curing period, moist cure after loosening forms.

3. If removing forms before end of curing period, continue curing for remainder of curing period.

C. Curing Unformed Surfaces: Comply with ACI 308.1 as follows:

1. Begin curing immediately after finishing concrete.

2. Interior Concrete Floors:

a. Floors to Receive Penetrating Liquid Floor Treatments: Contractor has option of the following:

1) Absorptive Cover: As soon as concrete has sufficient set to permit application without marring concrete surface, install prewetted absorptive cover over entire area of floor.

a) Lap edges and ends of absorptive cover not less than 12 inches.

b) Maintain absorptive cover water saturated, and in place, for duration of curing period, but not less than seven days.

2) Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches, and sealed by waterproof tape or adhesive.

a) Immediately repair any holes or tears during curing period, using cover material and waterproof tape.

b) Cure for not less than seven days.

3) Ponding or Continuous Sprinkling of Water: Maintain concrete surfaces continuously wet for not less than seven days, utilizing one, or a combination of, the following:

a) Water.

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b) Continuous water-fog spray.

b. Floors to Receive Polished Finish: Contractor has option of the following:

1) Absorptive Cover: As soon as concrete has sufficient set to permit application without marring concrete surface, install prewetted absorptive cover over entire area of floor.

a) Lap edges and ends of absorptive cover not less than 12 inches.

b) Maintain absorptive cover water saturated, and in place, for duration of curing period, but not less than seven days.

2) Ponding or Continuous Sprinkling of Water: Maintain concrete surfaces continuously wet for not less than seven days, utilizing one, or a combination of, the following:

a) Water.

b) Continuous water-fog spray.

c. Floors to Receive Curing Compound:

1) Apply uniformly in continuous operation by power spray or roller in accordance with manufacturer's written instructions.

2) Recoat areas subjected to heavy rainfall within three hours after initial application.

3) Maintain continuity of coating, and repair damage during curing period.

4) Removal: After curing period has elapsed, remove curing compound without damaging concrete surfaces by method recommended by curing compound manufacturer.

d. Floors to Receive Curing and Sealing Compound:

1) Apply uniformly to floors and slabs indicated in a continuous operation by power spray or roller in accordance with manufacturer's written instructions.

2) Recoat areas subjected to heavy rainfall within three hours after initial application.

3) Repeat process 24 hours later and apply a second coat. Maintain continuity of coating, and repair damage during curing period.

3.9 TOLERANCES

A. Conform to ACI 117.

3.10 APPLICATION OF LIQUID FLOOR TREATMENTS

A. Penetrating Liquid Floor Treatment: Prepare, apply, and finish penetrating liquid floor treatment in accordance with manufacturer's written instructions.

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1. Remove curing compounds, sealers, oil, dirt, laitance, and other contaminants and complete surface repairs.

2. Do not apply to concrete that is less than seven days' old.

3. Apply liquid until surface is saturated, scrubbing into surface until a gel forms;

rewet; and repeat brooming or scrubbing.

4. Rinse with water; remove excess material until surface is dry.

5. Apply a second coat in a similar manner if surface is rough or porous.

B. Sealing Coat: Uniformly apply a continuous sealing coat of curing and sealing compound to hardened concrete by power spray or roller in accordance with manufacturer's written instructions.

3.11 JOINT FILLING

A. Prepare, clean, and install joint filler in accordance with manufacturer's written instructions.

1. Defer joint filling until concrete has aged at least 28 days.

2. Do not fill joints until construction traffic has permanently ceased.

B. Remove dirt, debris, saw cuttings, curing compounds, and sealers from joints; leave contact faces of joints clean and dry.

C. Install semirigid joint filler full depth in saw-cut joints and at least 2 inches deep in formed joints.

D. Overfill joint, and trim joint filler flush with top of joint after hardening.

3.12 CONCRETE SURFACE REPAIRS

A. Defective Concrete:

1. Repair and patch defective areas when approved by Architect/Engineer.

2. Remove and replace concrete that cannot be repaired and patched to

Architect/Engineer's approval.

B. Patching Mortar: Mix dry-pack patching mortar, consisting of 1 part portland cement to 2-1/2 parts fine aggregate passing a No. 16 sieve, using only enough water for handling and placing.

C. Repairing Formed Surfaces: Surface defects include color and texture irregularities, cracks, spalls, air bubbles, honeycombs, rock pockets, fins and other projections on the surface, and stains and other discolorations that cannot be removed by cleaning.

1. Immediately after form removal, cut out honeycombs, rock pockets, and voids more than 1/2 inch in any dimension to solid concrete.

a. Limit cut depth to 3/4 inch.

b. Make edges of cuts perpendicular to concrete surface.

c. Clean, dampen with water, and brush-coat holes and voids with bonding agent.

d. Fill and compact with patching mortar before bonding agent has dried.

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e. Fill form-tie voids with patching mortar or cone plugs secured in place with bonding agent.

2. Repair defects on surfaces exposed to view by blending white portland cement and standard portland cement, so that, when dry, patching mortar matches surrounding color.

a. Patch a test area at inconspicuous locations to verify mixture and color match before proceeding with patching.

b. Compact mortar in place and strike off slightly higher than surrounding surface.

3. Repair defects on concealed formed surfaces that will affect concrete's durability and structural performance as determined by Architect/Engineer.

D. Repairing Unformed Surfaces:

1. Test unformed surfaces, such as floors and slabs, for finish, and verify surface tolerances specified for each surface.

a. Correct low and high areas.

b. Test surfaces sloped to drain for trueness of slope and smoothness; use a sloped template.

2. Repair finished surfaces containing surface defects, including spalls, popouts, honeycombs, rock pockets, crazing, and cracks in excess of 0.01 inch wide or that penetrate to reinforcement or completely through unreinforced sections regardless of width, and other objectionable conditions.

3. After concrete has cured at least 14 days, correct high areas by grinding.

4. Correct localized low areas during, or immediately after, completing surface-finishing operations by cutting out low areas and replacing with patching mortar.

a. Finish repaired areas to blend into adjacent concrete.

5. Correct other low areas scheduled to remain exposed with repair topping.

a. Cut out low areas to ensure a minimum repair topping depth of 1/4 inch to match adjacent floor elevations.

b. Prepare, mix, and apply repair topping and primer in accordance with manufacturer's written instructions to produce a smooth, uniform, plane, and level surface.

6. Repair defective areas, except random cracks and single holes 1 inch or less in diameter, by cutting out and replacing with fresh concrete.

a. Remove defective areas with clean, square cuts, and expose steel reinforcement with at least a 3/4-inch clearance all around.

b. Dampen concrete surfaces in contact with patching concrete and apply bonding agent.

c. Mix patching concrete of same materials and mixture as original concrete, except without coarse aggregate.

d. Place, compact, and finish to blend with adjacent finished concrete.

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e. Cure in same manner as adjacent concrete.

7. Repair random cracks and single holes 1 inch or less in diameter with patching mortar.

a. Groove top of cracks and cut out holes to sound concrete, and clean off dust, dirt, and loose particles.

b. Dampen cleaned concrete surfaces and apply bonding agent.

c. Place patching mortar before bonding agent has dried.

d. Compact patching mortar and finish to match adjacent concrete.

e. Keep patched area continuously moist for at least 72 hours.

E. Perform structural repairs of concrete, subject to Architect/Engineer's approval, using epoxy adhesive and patching mortar.

F. Repair materials and installation not specified above may be used, subject to Architect/Engineer's approval.

3.13 FIELD QUALITY CONTROL

A. Special Inspections: Owner will engage a special inspector to perform field tests and inspections and prepare testing and inspection reports.

B. Batch Tickets: For each load delivered, submit three copies of batch delivery ticket to testing agency, indicating quantity, mix identification, admixtures, design strength, aggregate size, design air content, design slump at time of batching, and amount of water that can be added at Project site.

C. Inspections:

1. Headed bolts and other embedded items.

2. Verification of use of required design mixture.

3. Concrete placement, including conveying and depositing.

4. Curing procedures and maintenance of curing temperature.

5. Verification of concrete strength before removal of shores and forms from beams and slabs.

D. Concrete Tests: Testing of composite samples of fresh concrete obtained in accordance with ASTM C 172/C 172M shall be performed in accordance with the following requirements:

1. Testing Frequency: Obtain one composite sample for each day's pour of each concrete mixture exceeding 5 cu. yd., but less than 25 cu. yd., plus one set for each additional 50 cu. yd. or fraction thereof.

a. When frequency of testing provides fewer than five compressive-strength tests for each concrete mixture, testing shall be conducted from at least five randomly selected batches or from each batch if fewer than five are used.

2. Slump: ASTM C143/C143M:

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a. One test at point of placement for each composite sample, but not less than one test for each day's pour of each concrete mixture.

b. Perform additional tests when concrete consistency appears to change.

3. Air Content: ASTM C231/C231M pressure method, for normal-weight concrete.

a. One test for each composite sample, but not less than one test for each day's pour of each concrete mixture.

4. Concrete Temperature: ASTM C1064/C1064M:

a. One test hourly when air temperature is 40 deg…