LD7_Cribwall_Repair_Amd1Spec.pdf

Lock and Dam 7 Guidewall Crib Repair

SECTION TABLE OF CONTENTS

DIVISION 03 - CONCRETE

SECTION 03 60 70.00

LOW-DENSITY CELLULAR CONCRETE FOR GROUTING GUIDEWALL CRIBS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 CONTRACTOR/SUPPLIER QUALIFICATIONS

PART 2 PRODUCTS

2.1 GENERAL LOW DENSITY CELLULAR CONCRETE REQUIREMENTS

2.2 MATERIALS

2.2.1 Foaming Agent

2.2.2 Cementitious Material

2.2.3 Aggregates

2.2.4 Admixtures

2.2.4.1 Accelerating Admixture

2.2.4.2 Water-Reducing or Retarding Admixture

2.2.4.2 Anti-Washout Admixture

2.2.5 Water

PART 3 EXECUTION

3.1 FORMWORK INSTALLATION

3.2 CONCRETE BATCHING

3.3 CONVEYING AND PLACING CONCRETE

3.3.1 Placement by Pump

3.4 COLD WEATHER CONSIDERATIONS

3.5 QUALITY CONTROL

3.5.1 Test Specimens

3.5.2 Compressive Strength Testing

3.5.3 Oven-Dry Density Testing

3.5.4 Reports

-- End of Section Table of Contents --

SECTION 03 60 70.00 Page 1

SECTION 03 60 70.00

LOW-DENSITY CELLULAR CONCRETE FOR GROUTING GUIDEWALL CRIBS

PART 1 GENERAL

The Lock and Dam 7 Guidewall Crib Repair project is intended to fill voids in the rock filled cribs formed by missing rock as well as the spaces between the existing rock. Rock fill has been lost due to past periods when scour occurred along the walls. It is not practical to dewater the guidewalls, therefore, the concrete will be placed in submerged cribs. The timber cribbing prevents access to the interior, so observation is limited to probing through voids, or by divers probing through the cribbing.

1.1 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.

ACI INTERNATIONAL (ACI)

ACI 523.3R (201) Guide for Cellular Concretes Above 50 Pcf, and for Aggregate Concretes Above 50 Pcf with Compressive Strengths less than 2500 psi

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 31/C 31M (2010) Standard Practice for Making and Curing Concrete Test Specimens in the Field

ASTM C 39/C 39M (2010) Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens

ASTM C 1077 (2014) Standard Practice for Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory Evaluation

ASTM C 138 (2009) Unit Weight, Yield, and Air Content (Gravimetric) of Concrete

ASTM C 150 (2009) Portland Cement

ASTM C 494/C 494M (2008a) Chemical Admixtures for Concrete

ASTM C 567 (2014) Determining Density of Structural Lightweight Concrete

ASTM C 595 (2011) Blended Hydraulic Cements

ASTM C 869 (2011) Foaming Agents Used in Making Preformed Foam for Cellular Concrete

SECTION 03 60 70.00 Page 2

ASTM D 98 (2005; R 2013) Calcium Chloride

ASTM INTERNATIONAL (ASTM)

ASTM C33/C33M (2013) Standard Specification for Concrete Aggregates

ASTM C94/C94M (2014b) Standard Specification for Ready-Mixed Concrete

U.S. ARMY CORPS OF ENGINEERS (USACE)

COE CRD-C 400 (1963) Requirements for Water for Use in Mixing or Curing Concrete

1.2 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. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Low Density Cellular Concrete Operation and Placement Plan; G,MAT.

The plan shall demonstrate a thorough understanding of all involved technical and logistical conditions necessary for the production and placement of concrete that meets all requirements of these specifications. The plan shall provide as a minimum the following:

a. Logistical concerns, such as sources of cement, pozzolan, and aggregates, aggregate stockpiles, mixing plant, maintaining access for lock personnel, etc.

b. Method and route for conveying batched concrete into cribs, including listing and layout of all needed equipment such as pumps, hoses/piping, tremies or sleeves, etc.

c. Methods used to ensure and confirm:

1. Existing features are not damaged

2. All identifiable voids in the crib rock are filled

3. Maximum possible depth of penetration into the in-place crib rock interstitial spaces is achieved

4. Any conveyance left in place as embedded are filled with concrete, with no voids remaining.

d. Concrete formwork layout, attachment details, and installation and removal scheduling and sequencing.

e. Concrete placement schedule and sequencing.

f. Method for measuring quantity of concrete placed, including process and calculations to allow for expansion, waste, leakage and spillage.

g. Means and methods to control and contain any and all sediments.

h. Methods for monitoring system leakage and planned responses when leakage is found.

i. Contractor quality control tests, inspections, monitoring, and responses.

SECTION 03 60 70.00 Page 3

j. Record keeping processes, frequencies and forms.

k. Government quality assurance. The contractor must coordinate and allow sufficient time for Government divers to inspect and approve formwork prior to concrete placement, observe during the placement operation, and inspect the finished surface once forms are removed. Coordinate timing with the Government Representative.

Cold Weather Concreting Plan; G,MAT

Contractor/Supplier Qualifications; G,MAT

The plan shall demonstrate a thorough understanding of the concrete uniformity requirements for on-site concrete batching in general accordance of ASTM C 685.

SD-03 Product Data

Submit manufacturer's literature available from suppliers which demonstrates compliance with applicable specifications for:

Anti-washout Admixture, Accelerating Admixture, Foaming Agent, Portland Cement, and Water-Reducing or Retarding Admixture.

SD-06 Test Reports

Mix Design; G,MAT

Certified copies of mix design report for low density cellular concrete indicating mixture proportions, post foaming agent expansion factor, average compressive strength in psi, dry density and wet unit weight at point of placement for the type proposed for the project. Allowances shall be made for any unit weight changes resulting from handling and placing methods.

Aggregate Gradation Testing Report; G,MAT

Certified copies of aggregate gradation test results showing conformance with requirements give in paragraph 2.2.3.

Aggregate Quality Testing Report; G,MAT

Certified copies of aggregate quality testing reports showing conformance with ASTM C33 Class designations 4M or better.

Low Density Cellular Concrete Placement Report; G,MAT

The Project Concrete Placement Report shall include the following:

a. Copies of all low density cellular concrete compressive strength and density reports, ordered by the date the test specimens were taken.

b. A set of tables showing the test results for all specimens created during project concrete placement. The tables shall be ordered by the dates the specimens were made and shall be grouped and arranged so that the test results for strength and density could be readily compared and reviewed for possible correlations.

c. A narrative describing the general placement process from installation to striping of the forms. This narrative should also include any unique placement problems and how these problems were overcome.

d. Photographs showing typical formwork, conveying and placing equipment.

SECTION 03 60 70.00 Page 4

e. Tabs or other means to easily navigate through the report.

f. Cover page showing the contract title and number.

g. The Project Concrete Placement Report may be provided in either digital or hard copy. Digital copy shall be searchable.

Coordinate with Government Representative for acceptable digital format. If hard copy is chosen, three hard copies are required, bound with a durable front and back cover.

SD-07 Certificates

Placement Quantity Calculation and Verification; G,COR

Delivery tickets shall be collected and furnished to the Contracting Officer for each load of ready-mix low density cellular concrete delivered to the site and acceptably placed.

Each delivery ticket shall include date, driver name, truck number, time of departure, quantity of concrete on board in cubic yards, and delivery location.

1.3 CONTRACTOR/SUPPLIER QUALIFICATIONS

Services of a firm experienced in the installation of cast-in-place low density concrete and underwater concrete placement shall be provided. The contractor shall have successfully completed at least three jobs involving underwater concrete placement in the past five years. A representative of the firm shall supervise the mixing, transporting, placing, and testing the low density concrete. This person shall be on site during all concrete placement operations.

PART 2 PRODUCTS

2.1 GENERAL LOW DENSITY CELLULAR CONCRETE REQUIREMENTS

Low Density Cellular Concrete shall meet the requirements of ACI 523.3R.

Low Density Cellular Concrete shall be composed of a cementitious material, water, fine aggregates, and admixtures. The design compressive strength shall not be less than 500 pounds per square inch. Low density concrete shall be proportioned for a minimum oven-dry unit weight between 70 and 80 pcf, and minimum average compressive strength at 28 days of 500 psi.

Materials shall meet the requirements of the respective publications and other data specified below. The w/cm of low density cellular concrete shall be 0.45 to 0.60 to ensure internal stability of the cellular structure.

The strength qualities of the low density concrete proposed for use shall be established by manufacturer's submitted data prior to the beginning of construction operations. The preparation of the design mix and subsequent testing shall be performed by an approved testing laboratory capable of performing such services or, if approved, by the manufacturer of the low density cellular concrete. Trial design batches shall be prepared with the same materials proposed for use in the work.

2.2 MATERIALS

Materials shall conform to the appropriate specifications listed:

2.2.1 Foaming Agent

Manufacturer of foaming agent shall provide specific instructions on the use and foam generation of the product that must be followed for

SECTION 03 60 70.00 Page 5 consistency of the mix design. Foaming agents for making low density cellular concrete shall conform to ASTM C 869.

2.2.2 Cementitious Material

Portland cement shall conform to ASTM C 150, Type I, III; or ASTM C 595, Type IS.

2.2.3 Aggregates

Only fine aggregates meeting the gradation listed in the table below shall be used:

Sieve Size Percent Passing

No. 8 100

No. 16 95 to 100

No. 30 55 to 80

No. 50 30 to 55

No. 100 10 to 30

No. 200 0 to 10

Fineness Modulus 1.3 to 2.10

Aggregates shall meet the quality requirements of ASTM C33/C33M Class Designations 4M or better.

2.2.4 Admixtures

Admixtures to be used, when required or approved, shall comply with the appropriate specification listed. Chemical admixtures that have been in storage at the project site for longer than 6 months or that have been subjected to freezing shall be retested at the expense of the contractor at the request of the Contracting Officer and shall be rejected if test results are not satisfactory.

2.2.4.1 Accelerating Admixture

Calcium chloride shall meet the requirements of ASTM D 98. Other accelerators shall meet the requirements of ASTM C 494/C 494M, Type C or E.

2.2.4.2 Water-Reducing or Retarding Admixture

Water-reducing or retarding admixture shall meet the requirements of ASTM C 494/C 494M, Type A, B, or D. High-range water reducing admixture Type F or G may be used only when approved, approval being contingent upon particular placement requirements as described in the Contractor's Quality Control Plan.Text

2.2.4.2 Anti-Washout Admixture

Anti-Washout admixture shall be self leveling and and self consolidating

SECTION 03 60 70.00 Page 6 and meet the requirements of CRD - C661 - 06, and ASTM C 494, Type S.

2.2.5 Water

Water for mixing and curing shall be fresh, clean, potable, and free of injurious amounts of oil, acid, salt, or alkali, except that non-potable water may be used if it meets the requirements of COE CRD-C 400. River water shall not be used.

PART 3 EXECUTION

3.1 FORMWORK INSTALLATION

Forms shall be properly aligned, adequately supported, and mortar-tight.

See Section 03 11 13.00 10 STRUCTURAL CAST-IN-PLACE CONCRETE FORMING.

3.2 CONCRETE BATCHING

The low density cellular concrete shall be batched as ready-mixed concrete conforming to ASTM C94/C94M except as otherwise specified.

3.3 CONVEYING AND PLACING CONCRETE

The concrete shall be delivered to the site of the work and placement shall be completed within 1-1/2 hours after initial mixing at the plant. Concrete shall be conveyed from the mixer to the forms as rapidly as practicable by methods which prevent segregation or loss of ingredients. Concrete shall be deposited as close as possible to its final position. The contractor must coordinate with the COR and allow sufficient time and access for Government divers to inspect and approve formwork prior to concrete placement, observe during the placement operation, and inspect the finished surface once forms are removed.

3.3.1 Placement by Pump

Concrete may be conveyed by positive displacement pump when approved. The pumping equipment must be piston or squeeze pressure. The pipeline must be rigid steel or heavy-duty flexible hose. The inside diameter of the pipe must be at least three times the nominal maximum-size coarse aggregate in the concrete mixture to be pumped but not less than 4 inches. Do not use aluminum pipe.

3.4 COLD WEATHER CONSIDERATIONS

Contractor shall submit a cold weather concreting plan showing compliance with the requirements contained in this paragraph. Low Density cellular concrete shall not be mixed or placed during freezing weather, rain, snow, or ice unless special precautions are taken. Use special precautions when anticipating ambient or river water temperatures below 32 degrees Fahrenheit within 8 hours after placement. Special precautions include, but are not limited to the use of Type III Cement, heating of the mixing water, or aggregates. The placing temperature of the concrete having a minimum dimension greater than 12 inches shall be between 50 degrees Fahrenheit and 70 degrees Fahrenheit. Materials entering the mixer shall be free from ice, snow, or frozen lumps. Salt, chemicals, or other materials shall not be mixed with the concrete to prevent freezing. Submit the proposed materials, methods, and protection for approval, if concrete is to be placed under cold weather conditions.

SECTION 03 60 70.00 Page 7

3.5 QUALITY CONTROL

3.5.1 Test Specimens

Test specimens taken from the mixes of each day's placement shall be prepared in sets of 6 cylinders: 3 for compressive strength testing and 3 for dry density testing. Test specimens shall be either 3" x 6" cylinders or 4" x 8" cylinders. Test specimens (for compressive strength and dry density) shall be cast in accordance with ASTM C 31/C 31M, except the molds shall be filled in one layer, with no rodding and only tapping the sides of the mold with a rubber hammer while the mold is being filled. Test cylinders shall be cast at the following rates:

(a) not less than once each day concrete is placed, within the first 25 cubic yards placed that day. AND

(b) not less than once for each 100 cubic yards of concrete placed.

In addition to the test specimens described above the contractor shall measure wet density during placement of the initial batch and make any adjustments necessary to achieve the specified cast density. Wet density testing of each subsequent batch shall be measured to ensure the specified cast density requirement is being met. The density of freshly mixed lightweight concrete shall be tested and reported in accordance with Test Method ASTM C 138.

3.5.2 Compressive Strength Testing

Compressive strength shall be tested in accordance with ASTM C 39/C 39M.

Of each set of three cylinders cast, one shall be tested at 7 days and two shall be tested at 28 days. The laboratory performing the tests shall conform with ASTM C 1077. Testing shall be performed by an independent testing laboratory at the expense of the Contractor.

3.5.3 Oven-Dry Density Testing

The oven-dry density of three test cylinders shall be determined by

ASTM C 567.

3.5.4 Reports

The results of all tests and quality control inspections conducted at the project site, as well as corrective action taken, shall be reported in the daily QC report on the date the test results are received by the Contractor or the date the inspection was performed. Copies of the concrete test result reports shall be compiled and delivered to the quality assurance representative weekly. This is in addition to copies of the test result reports provided in the Project Concrete Placement Report required after all concrete has been placed. The Contracting Officer has the right to examine all Contractor quality control records.

-- End of Section --

SECTION 03 60 70.00 Page 8

SUBMITTAL FORM,Jan 96 PREVIOUS EDITION IS OBSOLETE PAGE 1 OF 2 PAGES

W912ES-15-X-00XX

Lock and Dam 7 Guidewall Crib Repair

01 32 01.00 13 SD-01 Preconstruction Submittals

2.4.1 G CORInitial Project Schedule

2.4.2 G CORPeriodic Updates

01 35 26 SD-01 Preconstruction Submittals

1.6 G SOAccident Prevention Plan (APP)

1.7 G SOActivity Hazard Analysis (AHA)

1.6.1 G SOCrane Critical Lift Plan

1.5.1.2 G SOCrane Operators

G SODive Operation Plan SD-06 Test Reports

1.12 GNotifications and Reports

1.12.2 G SOAccident Reports

1.12.3Crane Reports

SD-07 Certificates 1.9Confined Space Entry Permit

G SOLicense Certificates 1.12.4Certificate of Compliance

01 45 04.00 13 SD-01 Preconstruction Submittals GQuality Control Plan (QCP) GQuality Management Manual

01 50 02.00 13 SD-02 Shop Drawings Site Plan

SD-06 Test Reports Formaldehyde Emission Test Results

01 57 20.00 13 SD-01 Preconstruction Submittals

SUBMITTAL REGISTER

CONTRACT NO.

TITLE AND LOCATION CONTRACTOR

CONTRACTOR:

SCHEDULE DATES

CONTRACTOR

ACTION

APPROVING AUTHORITY

A C T I V I T Y

N O

T R A N S M I T T A L

N O

S P E C

S E C T

DESCRIPTION

ITEM SUBMITTED

P A R A G R A P H

C L A S S I F I C A T I O N

G O V T

O R

A E

R E V W

R SUBMIT

APPROVAL

NEEDED

BY

MATERIAL

NEEDED

BY

A C T I O N

C O D E

DATE

OF

ACTION

DATE FWD

TO APPR

AUTH/

DATE RCD

FROM

CONTR

DATE FWD

TO OTHER

REVIEWER

DATE RCD

FROM OTH

REVIEWER

A C T I O N

C O D E

DATE

OF

ACTION

MAILED

TO

CONTR/

DATE RCD

FRM APPR

AUTH REMARKS

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l) (m) (n) (o) (p) (q) (r)

SUBMITTAL FORM,Jan 96 PREVIOUS EDITION IS OBSOLETE PAGE 2 OF 2 PAGES

W912ES-15-X-00XX

Lock and Dam 7 Guidewall Crib Repair

01 57 20.00 13 GFloating Silt Curtain

1.7 G ENVEnvironmental Protection Plan

01 78 02.00 10 SD-11 Closeout Submittals

1.2 GFinal Low Density Cellular

Concrete Placement Quantity 03 60 70.00 SD-01 Preconstruction Submittals

G MATLow Density Cellular Concrete Operation and Placement Plan

3.4 G MATCold Weather Concreting Plan

G MATContractor/Supplier Qualifications

SD-06 Test Reports G MATMix Design G MATAggregate Gradation Testing

Report G MATAggregate Quality Testing Report G MATLow Density Cellular Concrete

Placement Report SD-07 Certificates

G CORPlacement Quantity Calculation and Verification

SUBMITTAL REGISTER

CONTRACT NO.

TITLE AND LOCATION CONTRACTOR

CONTRACTOR:

SCHEDULE DATES

CONTRACTOR

ACTION

APPROVING AUTHORITY

A C T I V I T Y

N O

T R A N S M I T T A L

N O

S P E C

S E C T

DESCRIPTION

ITEM SUBMITTED

P A R A G R A P H

C L A S S I F I C A T I O N

G O V T

O R

A E

R E V W

R SUBMIT

APPROVAL

NEEDED

BY

MATERIAL

NEEDED

BY

A C T I O N

C O D E

DATE

OF

ACTION

DATE FWD

TO APPR

AUTH/

DATE RCD

FROM

CONTR

DATE FWD

TO OTHER

REVIEWER

DATE RCD

FROM OTH

REVIEWER

A C T I O N

C O D E

DATE

OF

ACTION

MAILED

TO

CONTR/

DATE RCD

FRM APPR

AUTH REMARKS

(a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) (l) (m) (n) (o) (p) (q) (r)

2.2.5 Water