03 30 00.10.pdf

Charleroi Locks and Dam - Upper and Lower Guard Walls

SECTION TABLE OF CONTENTS

DIVISION 03 - CONCRETE

SECTION 03 30 00.10

CONCRETE: GENERAL REQUIREMENTS

PART 1 GENERAL

1.1 SUMMARY

1.2 RELATED WORK SPECIFIED ELSEWHERE

1.3 REFERENCES

1.4 SUBMITTALS

1.5 QUALIFICATIONS

1.6 SPECIAL REQUIREMENTS

1.6.1 Government-Furnished Concrete

1.6.2 Concrete Plans

1.6.3 Coordination Meetings

1.6.4 Coordination of Production and Delivery

1.7 GENERAL REQUIREMENTS

1.7.1 Tolerances

1.8 GOVERNMENT ASSURANCE INSPECTION AND TESTING

1.8.1 Fresh Concrete

1.8.2 Hardened Concrete

1.8.3 Inspection

PART 2 PRODUCTS

2.1 MATERIALS

PART 3 EXECUTION

3.1 CONCRETE PLACEMENT

-- End of Section Table of Contents --

SECTION 03 30 00.10 Page 1 W911WN-09-B-0004 Revised by Amendment No. 0002

SECTION 03 30 00.10

CONCRETE: GENERAL REQUIREMENTS

PART 1 GENERAL

1.1 SUMMARY

This section addresses the basic requirements for concrete to be placed under this project. The location of the various concrete placements are listed in Table B at the end of Section 03 30 00.40 CONCRETE: MIXTURE PROPORTIONING. A basic description and required concrete mixture design number are provided in Table A at the end of Section 03 30 00.40 CONCRETE:

MIXTURE PROPORTIONING. Mix design properties are presented in Table C at the end of Section 03 30 00.40 CONCRETE: MIXTURE PROPORTIONING.

1.2 RELATED WORK SPECIFIED ELSEWHERE

Section 03 30 00.20 CONCRETE: FIELD DEMONSTRATIONS

Section 03 30 00.40 CONCRETE: MIXTURE PROPORTIONING

Section 03 30 00.50 CONCRETE: PRODUCTION AND TRANSPORT

Section 03 30 00.60 CONCRETE: PLACEMENT REQUIREMENTS

Section 03 11 14.00 10 CONCRETE: FORMWORK

Section 03 20 02 CONCRETE: STEEL BARS AND WELDED WIRE FABRIC FOR

CONCRETE REINFORCEMENT

Section 03 23 00 CONCRETE: STEEL STRESSING TENDONS AND ACCESSORIES FOR

PRESTRESSED CONCRETE

Section 03 15 14.00 10 CONCRETE: EXPANSION, CONTRACTION AND

CONSTRUCTION JOINTS IN CONCRETE FOR CIVIL WORKS

Section 03 30 00.70 CONCRETE: CAST-IN-PLACE

03 45 33 PRECAST PRESTRESSED STRUCTURAL CONCRETE

Section 03 37 26.10 CONCRETE: FLOWABLE

Section 03 70 00 CONCRETE: MASS

Section 03 31 23 CONCRETE: DRILLED SHAFTS

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

SECTION 03 30 00.10 Page 2

ACI INTERNATIONAL (ACI)

ACI 117 (2006) Standard Specifications for Tolerances for Concrete Construction and Materials

ASTM INTERNATIONAL (ASTM)

ASTM C 172 (2008) Standard Practice for Sampling Freshly Mixed Concrete

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Schedule Of Proposed Concrete Production And Placement

Submit weekly updates of the Contractor's proposed schedule of concrete placement for the work under this contract.

SD-07 Certificates

Qualifications; G, RE

Written documentation for Contractor Quality Control personnel.

1.5 QUALIFICATIONS

Contractor Quality Control personnel assigned to concrete construction shall be American Concrete Institute (ACI) Certified in one of the following grades:

QC Field Technician, Concrete Field Testing Technician, Grade I

The foreman or lead journeyman of the flatwork finishing crew shall have similar qualification for ACI Concrete Flatwork Technician/Finisher, with written documentation.

1.6 SPECIAL REQUIREMENTS

1.6.1 Government-Furnished Concrete

All concrete required for construction of the Upper Guard Wall and Lower Guard Wall, except concrete for precast components, will be furnished by the Government as specified in Section 03 30 00.50 CONCRETE: PRODUCTION AND TRANSPORT. The Contractor will be required to accept the concrete at the specified Points of Delivery and convey it to the placement locations as specified in Section 03 30 00.50 CONCRETE: PRODUCTION AND TRANSPORT.

1.6.2 Concrete Plans

Concrete plans shall be submitted to the Contracting Officer for comment

SECTION 03 30 00.10 Page 3 and approval 90 days prior to the start of concrete placement for any phase of the concrete work. The plan shall be specific to that phase of concrete work and shall describe the equipment and methods to be used for concrete conveyance, placement, consolidation, finishing and protection. The timing and sequence of the various steps from batching until protection shall also be described. The plan shall demonstrate that equipment and methods are appropriate for the specific type of concrete, and that the work conforms to the requirements of Division 03 CONCRETE.

1.6.3 Coordination Meetings

A pre-construction meeting with the Contracting Officer and representatives from the contractor responsible for producing the concrete and conveying it to the Points of Delivery will be required at least 30 days prior to the start of concrete placement for any phase of the concrete work. In addition, weekly progress meetings with the Contracting Officer will be required as concrete work progresses. The Contractor shall be responsible for calling the meeting; the Project Engineer, Project Superintendent, Concrete Foreman, Batch Plant Production Manager, and active construction and quality control personnel shall be present.

1.6.4 Coordination of Production and Delivery

The Contractor shall prepare a schedule of proposed concrete production and placement for the work under this contract covering a period of at least 30 calendar days. The schedule shall be updated on a weekly basis and submitted to the Contracting Officer. The contractor for the Charleroi Contract One will also be required to submit a schedule of proposed concrete placement under that contract and update it on a weekly basis.

The Contracting Officer will be responsible for coordination of the schedules. In the event of conflict between the proposed schedules for concrete placement under Charleroi Contract One and the Charleroi Upper and Lower Guard Walls Contract, the schedule for Charleroi Contract One will take precedence. Placement of concrete upstream of the dam shall be completed first unless otherwise specified; concrete placement downstream of the dam shall not commence until all concrete has been placed upstream of the dam, except concrete for the Lower Guard Wall demonstration drilled shaft only may be placed concurrent with the placement of concrete upstream of the dam. Concrete production will only be performed one 8-hour shift per day, weekdays (Monday throuugh Friday) only. Concrete will not be produced on weekends (Saturday and Sunday).

1.7 GENERAL REQUIREMENTS

1.7.1 Tolerances

Except as otherwise specified herein or noted on the drawings, tolerances for concrete construction as well as definition of terms and application practices shall be in accordance with ACI 117.

Level and grade tolerance measurements of slabs shall be made as soon as possible after finishing. When forms or shoring are used, the measurements shall be made prior to removal. Tolerances are not cumulative. The most restrictive tolerance controls. Tolerances shall not extend the structure beyond legal boundaries. Except as specified otherwise, plus tolerance increases the amount or dimension to which it applies, or raises a level alignment and minus tolerance decreases the amount or dimension to which it applied, or lowers a level alignment. A tolerance without sign means plus or minus. Where only one signed tolerance is specified, there is no limit

SECTION 03 30 00.10 Page 4 in the other direction.

The definitions of the terms used in the following tabulations are used as defined and used in ACI 117. Level and grade tolerance measurements of slabs shall be made as soon as possible after finishing.

TOLERANCES FOR FOUNDATIONS1

Tolerances for drilled shaft foundations are provided in Section 31 63 26.00 10 DRILLED SHAFTS.

TOLERANCES FOR CAST-IN-PLACE REINFORCED CONCRETE

(1) Vertical alignment

For heights 100 feet or less

Lines, surfaces, and arises .......................... 1 in.

Outside corner of exposed corner columns and control joint grooves in concrete exposed to view ..................................... 1/2 in.

For heights greater than 100 ft

Lines, surfaces, and arises, 1/1,000 times the height at any point but not more than ............. 6 in.

Outside corner of exposed corner columns and control joint grooves in concrete, 1/2,000 times the height at any point but not more than ............................................. 3 in.

(2) Lateral alignment

Members .................................................... 1 in.

In slabs, centerline location of openings 12 in. or smaller and edge location of larger openings .............................. 1/2 in.

Sawcuts, joints, and weakened plane embedment in slabs ....................................... 3/4 in.

(3) Level alignment

Top of slabs

Elevation of slabs-on-grade ......................... 3/4 in.

Elevation of top surfaces of formed slabs before removal of supporting shores ................. 3/4 in.

Elevation of formed surfaces before removal of shores ................................................ 3/4 in.

Lintels, sills, parapets, horizontal grooves, and other lines exposed to view .......................... 1/2 in.

SECTION 03 30 00.10 Page 5

TOLERANCES FOR CAST-IN-PLACE REINFORCED CONCRETE

(4) Cross-sectional dimensions

Members, walls(thickness only) and slabs (thickness only)

12 in. dimension or less ............................................ +3/8 in.

............................................ -1/4 in.

More than 12 in.

but not over 3 ft dimension ..................................... +1/2 in.

..................................... -3/8 in.

Over 3 ft dimension .................................. +1 in.

................................ -3/4 in.

(5) Relative alignment

Stairs

Different in height between adjacent risers ..................................... 1/8 in.

Different in width between adjacent treads ..................................... 1/4 in.

Grooves

Specified width 2 in. or less ....................... 1/8 in.

Specified width more than 2 in.

but not more than 12 in. ............................ 1/4 in.

Sawcuts, joints, and weakened plane on slab

Lateral, gradual .......................... 3/4 in. in 10 ft.

Lateral, abrupt ....................................... 0 in.

(6) Openings through members

Cross-sectional size of opening ........................... +1 in.

......................... -1/4 in.

Location of centerline of opening ........................ 1/2 in.

TOLERANCES FOR PRECAST CONCRETE UNITS

Unless noted otherwise on the drawings, or specified elsewhere, these tolerances apply to all precast elements to be manufactured under this contract including Upper Guard Wall box beams and cap beams, Lower Guard Wall shaft enclosures, cap beams and wall panels, emptying valve and cross culvert liners, and the emptying valve outlet basin.

(1) Overall Dimensions of Elements............................ 1/4 in.

or .......................................... 1/8 inch in 10 feet.

(whichever is lesser)

SECTION 03 30 00.10 Page 6

TOLERANCES FOR PRECAST CONCRETE UNITS

(2) Cross-sectional dimensions .............................. + 3/16 in.

More than 36 in. dimension ............................... 3/8 in.

(3) Horizontal alignment

Straight line parallel to theoretical centerline . 1/8 in. in 10 ft.

but not more than ................................... 1/4 in.

(4) Camber

Precast Units ................................... 1/8 in. in 10 ft.

but not more than ......................................... 1/4 in.

Differential at midspan between adjacent units .................................. 1/4 in. in 10 ft.

but not more than ......................................... 3/4 in.

(5) Handling devices ............................................ 6 in.

(6) Anchors and Inserts ......................................... 1 in.

(7) Flange thickness .......................................... 1/4 in.

......................................... -1/8 in.

(8) Depth of unit at support .................................. 1/4 in.

(9) Distance between stems .................................... 1/8 in.

(10) Squareness of ends (horizontal and vertical planes) ....... 1/4 in.

TOLERANCE FOR POST TENSIONING

(1) Position of tendons

Embedded sleeves for post tensioning ...................... 1/4 in.

TOLERANCE FOR FINISHED FORMED CONCRETE SURFACES

(1) Vertical alignment

Formed surfaces slope with respect to the specified plane

Vertical alignment of outside corner of exposed corner columns and control joint grooves in concrete exposed to view ..................................... 1/4 in. in 10 ft.

All other conditions ........................ 3/8 in. in 10 ft.

(2) Abrupt variation

The offset between concrete surfaces under adjacent pieces of formwork for the following classes of surface: (For Class A-HV, positive means raise of elevation in the direction of water flow, negative means drop of elevation in the direction of water flow)

SECTION 03 30 00.10 Page 7

TOLERANCE FOR FINISHED FORMED CONCRETE SURFACES

Class A ............................................. 1/8 in.

Class B ............................................. 1/4 in.

Class C ............................................. 1/2 in.

Class D ............................................... 1 in.

(3) Gradual variation

Surface finish tolerances as measured by placing a freestanding (unleveled), 5 ft straightedge for plane surface or curved template for curved surface anywhere on the surface and allowing it to rest upon two high spots within 72 hours after concrete placement. The gap at any point between the straightedge or template and the surface shall not exceed:

Class A ............................................. 1/8 in.

Class B ............................................. 1/4 in.

Class C ............................................. 1/2 in.

Class D ............................................... 1 in.

1.8 GOVERNMENT ASSURANCE INSPECTION AND TESTING

Day-to day inspection and testing shall be the responsibility of the Contractor Quality Control (CQC) staff. However, representatives of the Contracting Officer can and will inspect construction as considered appropriate and will monitor operations of the Contractor's CQC staff.

Government inspection or testing will not relieve the Contractor of any of his CQC responsibilities.

1.8.1 Fresh Concrete

Fresh concrete will be sampled at the Batch Plant as delivered in accordance with ASTM C 172 and tested in accordance with these specifications, as considered necessary. This sampling and testing will be by others and will not be the responsibility of the Contractor.

1.8.2 Hardened Concrete

Tests on hardened concrete will be performed by the Government when such tests are considered necessary.

1.8.3 Inspection

Concrete operations may be tested and inspected by the Government as the project progresses. Failure to detect defective work or material will not prevent rejection later when a defect is discovered nor will it obligate the Government for final acceptance.

PART 2 PRODUCTS

2.1 MATERIALS

Concrete complying with the requirements specified will be furnished by the Government as specified in Section 03 30 00.50 CONCRETE: PRODUCTION AND TRANSPORT. Requirements for appurtenant materials shall be in accordance with the specification sections as follows:

SECTION 03 30 00.10 Page 8

Section 03 11 14.00 10 CONCRETE: FORMWORK

Section 03 15 14.00 10 CONCRETE: EXPANSION JOINTS, CONTRACTION JOINTS, AND WATERSTOPS

Section 03 20 02 CONCRETE: STEEL BARS AND WELDED WIRE FABRIC FOR

CONCRETE REINFORCEMENT

Section 03 23 00 CONCRETE: STEEL STRESSING TENDONS AND ACCESSORIES FOR

PRESTRESSED CONCRETE

Section 03 30 00.70 CONCRETE: CAST-IN-PLACE

Section 03 45 33 PRECAST PRESTRESSED STRUCTURAL CONCRETE

Section 03 37 26.10 CONCRETE: FLOWABLE

Section 03 70 00 CONCRETE: MASS

Section 03 31 23 CONCRETE: DRILLED SHAFTS

PART 3 EXECUTION

3.1 CONCRETE PLACEMENT

Concrete placement, finishing, curing shall be in accordance with Section 03 30 00.60 CONCRETE: PLACEMENT REQUIREMENTS. Unique placement requirements pertaining to drilled shaft concrete are provided in other specification sections. Concrete shall be conveyed from the specified Points of Delivery to forms as rapidly as possible and within the time interval specified by methods which will prevent segregation or loss of ingredients. Conveying equipment shall be cleaned after each placement.

-- End of Section --

SECTION 03 30 00.10 Page 9