A21_-_W912P818B0020.pdf

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(Hour)

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until 02:00 PM local time 13 Mar 2018

X

A X B X C

D

EX

X G F 195 - 207

208 - 216 X H 217- 219

RATING PAGE OF PAGES

7. ISSUED BY

(Date)

IMPORTANT - Award will be made on this Form, or on Standard Form 26, or by other authorized official written notice.

Previous Edition is Unusable 33-134 STANDARD FORM 33 (REV. 9-97)

Prescribed by GSA FAR (48 CFR) 53.214(c)

(If other than Item 7)

15A. NAME 16. NAME AND TITLE OF PERSON AUTHORIZED TO

AND

ADDRESS

SIGN OFFER (Type or print)

OF

OFFEROR

AMENDMENT NO. DATE

15B. TELEPHONE NO (Include area code) 17. SIGNATURE15C. CHECK IF REMITTANCE ADDRESS

IS DIFFERENT FROM ABOVE - ENTER

SUCH ADDRESS IN SCHEDULE.

18. OFFER DATE

1. THIS CONTRACT IS A RATED ORDER

UNDER DPAS (15 CFR 700)

2. CONTRACT NO.

W912P8 8. ADDRESS OFFER TO

See Item 7

9. Sealed offers in original and copies for furnishing the supplies or services in the Schedule will be received at the place specified in Item 8, or if handcarried, in the depository located in

CAUTION - LATE Submissions, Modifications, and Withdrawals: See Section L, Provision No. 52.214-7 or 52.215-1. All offers are subject to all terms and room 172 conditions contained in this solicitation.

10. FOR INFORMATION

CALL:

A. NAME (NO COLLECT CALLS)

11. TABLE OF CONTENTS

SOLICITATION/ CONTRACT FORM

SUPPLIES OR SERVICES AND PRICES/ COSTS

1 - 3 4 - 6

X I CONTRACT CLAUSES

DESCRIPTION/ SPECS./ WORK STATEMENT X

PACKAGING AND MARKING

7- 46 J LIST OF ATTACHMENTS

INSPECTION AND ACCEPTANCE

DELIVERIES OR PERFORMANCE

47 - 57 58 - 63

X K

REPRESENTATIONS, CERTIFICATIONS AND

OTHER STATEMENTS OF OFFERORS

CONTRACT ADMINISTRATION DATA 64 - 67 X

SPECIAL CONTRACT REQUIREMENTS

OFFER (Must be fully completed by offeror) 68 - 104 X M

L INSTRS., CONDS., AND NOTICES TO OFFERORS

EVALUATION FACTORS FOR AWARD

NOTE: Item 12 does not apply if the solicitation includes the provisions at 52.214-16, Minimum Bid Acceptance Period.

is inserted by the offeror) from the date for receipt of offers specified above, to furnish any or all items upon which prices are offered at the price set opposite each item, delivered at the designated point(s), within the time specified in the schedule.

13. DISCOUNT FOR PROMPT PAYMENT

(See Section I, Clause No. 52.232-8)

14. ACKNOWLEDGMENT OF AMENDMENTS

(The offeror acknowledges receipt of amendments

AMENDMENT NO. DATE

to the SOLICITATION for offerors and related documents numbered and dated):

FACILITY

12. In compliance with the above, the undersigned agrees, if this offer is accepted within calendar days (60 calendar days unless a different period

SOLICITATION, OFFER AND AWARD

X

(X) SEC. DESCRIPTION (X) SEC. DESCRIPTION PAGE(S)

PART I - THE SCHEDULE

26. NAME OF CONTRACTING OFFICER (Type or print) 27. UNITED STATES OF AMERICA 28. AWARD DATE

EMAIL:TEL: (Signature of Contracting Officer)

CODE CODE

B. TELEPHONE (Include area code) C. E-MAIL ADDRESS

AWARD (To be completed by Government)

19. ACCEPTED AS TO ITEMS NUMBERED 20. AMOUNT 21. ACCOUNTING AND APPROPRIATION

22. AUTHORITY FOR USING OTHER THAN FULL AND OPEN COMPETITION:

10 U.S.C. 2304(c)( ) 41 U.S.C. 253(c)( ) (4 copies unless otherwise specified)

23. SUBMIT INVOICES TO ADDRESS SHOWN IN ITEM

24. ADMINISTERED BY (If other than Item 7) CODE 25. PAYMENT WILL BE MADE BY CODE

PART IV - REPRESENTATIONS AND INSTRUCTIONS

PART III - LIST OF DOCUMENTS, EXHIBITS AND OTHER ATTACHMENTS

105 - 123

PART II - CONTRACT CLAUSES

USACE, CONTRACTING DIVISION

ATTN: CEMVN-CT, ROOM 172

7400 LEAKE AVE.

NEW ORLEANS LA 70118-3651

FAX:

TEL:

FAX:

TEL:

NOTE: In sealed bid solicitations "offer" and "offeror" mean "bid" and "bidder".

SOLICITATION

124-194

6. REQUISITION/PURCHASE NO.5. DATE ISSUED

08 Feb 2018

4. TYPE OF SOLICITATION

SEALED BID (IFB)

NEGOTIATED (RFP)

[ X ]

3. SOLICITATION NO.

W912P818B0020

DEPARTMENT OF THE ARMY

MISSISSIPPI RIVER COMMISSION

AND

MISSISSIPPI VALLEY DIVISION

CORPS OF ENGINEERS

STANDARD SPECIFICATIONS FOR

CASTING ARTICULATED CONCRETE MATTRESS

NOTE: ALL WORK UNDER THESE SPECIFICATIONS SHALL BE PERFORMED IN

ACCORDANCE WITH THE PROVISIONS OF EM 385-1-1 “U.S. ARMY CORPS OF

ENGINEERS SAFETY AND HEALTH REQUIREMENTS MANUAL”, LATEST

EDITION.

CASTING ARTICULATED CONCRETE MATTRESS

ST. FRANCISVILLE, LOUISIANA

ED 18-005

MAIN TABLE OF CONTENTS

SECTION NO. SECTION TITLE PAGE NO.

A-2

SECTION A COVER SHEET A-1 thru A-2

SECTION B SUPPLIES OR SERVICES AND B-1 thru B-3

PRICES/COSTS BID SCHEDULE

SECTION C1 DESCRIPTION/SPECIFICATIONS C1-1 thru C1-32

SECTION C2 STORM WATER POLLUTION C2-1 thru C2-5

PREVENTION PLAN

SECTION D NOT USED

SECTION E INSPECTION AND ACCEPTANCE E-1 thru E-9

SECTION F DELIVERIES OR PERFORMANCE F-1 thru F-4

SECTION G CONTRACT ADMINISTRATIVE G-1 thru G-2

DATA

SECTION H1 SPECIAL CONTRACT H1-1 thru H1-28

REQUIREMENTS

SECTION H2 RESIDENT MANAGEMENT SYSTEM H2-1 thru H2-6

CONTRACTOR MODE (RMS CM)

SECTION I CONTRACT CLAUSES I-1

SECTION J LIST OF ATTACHMENTS J-1

SECTION K REPRESENTATIONS, K-1

CERTIFICATIONS AND OTHER

STATEMENTS OF OFFERORS

SECTION L INSTRUCTIONS, CONDITIONS L-1

AND NOTICES TO OFFERORS

SECTION M EVALUATION AND AWARD M-1

FACTORS

NOTE: This is a 100% Small Business Set Aside Procurement

B-1

SECTION B

SUPPLIES OR SERVICES AND PRICES/COSTS

BID SCHEDULE

ITEM DESCRIPTION

EST.

QUANTITY U/M U/P

EST.

AMOUNT

BASE WORK

0001 Articulated Concrete Mattress

0001A Casting Mattress (exclusive of cement and fly ash), using Portland cement, fly ash, and water-reducing admixture

41,000 SQ ________ ___________

0001B Portland Cement 100,040 CWT ________ ___________

0001C Fly Ash 17,507 CF ________ ___________

TOTAL BASE WORK: $ ____________________

OPTIONAL WORK

0002 Fill, Place, and Remove

Sandbags

0002A First 15,000 15,000 EA ________ ___________

0002B Over 5,000 5,000 EA ________ ___________

TOTAL OPTIONAL WORK: $ ____________________

TOTAL BASE WORK + OPTIONAL WORK: $ ____________________

NOTE 1: The bidder is required to bid on all line items. Failure to submit a bid on all such line items shall result in a non-responsive bid, requiring reject thereof. In the event that a bidder is willing to waive costs associated with the individual line item, he/she is required to insert descriptive words or abbreviations such as "no charge" or "N.C.".

NOTE 2: END ITEMS. For small business concern representative purposes, the end item being procured under this solicitation are completed squares of articulated concrete mattress. Ingredients such as Portland Cement and Fly Ash, etc., are not end items.

NOTE 3: Cement and Fly Ash quantities are based on historical usage, and will be used to evaluate bids. Actual amounts will depend on the various mix designs furnished by the Government during the contract performance period. Fly Ash may vary from 0 to 35 percent of total cementitious materials.

NOTE 4: SITE VISITS. For site visit information see Section L – INSTRUCTIONS, CONDITIONS AND NOTICES TO OFFERORS, paragraph entitled "SITE VISIT".

B-2

NOTE 5: For variation in quantity clause see Section F – DELIVERIES OR PERFORMANCE, paragraph entitled "VARIATION IN QUANTITY (FAR 52.211-16 - APR 1984)".

NOTE 6: OPTIONAL WORK ITEMS. The Government may require the delivery of the numbered line item(s), identified in the schedule as OPTIONAL WORK Items, in the quantities and prices stated in the schedule. The Contracting Officer may exercise the OPTION WORK Items by written notice to the Contractor. Bidders shall bid on all items including optional items (see “Evaluation of Options” FAR 52.217-5). Failure to bid on all items will result in a non-responsive bid.

NOTE 7: EVALUATION OF OPTIONS (FAR 52.217-5 - JUL 1990). The Government will evaluate offers for award purposes by adding the total price for all options to the total price for this basic requirement. Evaluation of options will not obligate the Government to exercise the option(s).

NOTE 8: Bid Items 0001B and 0001C are estimates only. Actual pay quantities will be the theoretical quantities based on government mix design and the actual number of accepted mats.

NOTE 9: As per FAR 9.104-2, special standards of responsibility have been established for this acquisition. A pre-award survey will be required. Before award, the apparent low bidder must provide documentation sufficient to satisfy the following definitive responsibility criteria. An apparent low bidder who is not able to timely satisfy these definitive responsibility criteria will be deemed to lack responsibility and will be ineligible for award:

(1) Audited balance sheets.

(2) Successful past performance references for casting mats.

(3) Credit references.

(4) Availability of specialized equipment required for casting mats:

a. The Contractor shall have equipment designated for use on this contract readily available for locating on the casting field. The equipment shall be in good operating condition and ready for immediate use. Prior to award, and as part of its responsibility determination, the Government shall verify that major items of equipment are satisfactory and presently available for performing the work required on this contract and are in good operating condition.

b. As a minimum, items of specialized equipment that are considered essential to performing the contract requirements and included in the required definitive responsibility criteria are listed as follows:

i. Two (2) – Spreaders and one (1) – standby

ii. One (1) – Transverse Finisher/Rotary Finisher/Vibrator Machine and One

(1) – standby machine(s). This may be three separate machines or the three operations may be combined in one or two machines.

iii. Three (3) – Form Lifter/Setter Machines

iv. One (1) – Mat Sweeper

v. One (1) – Standby Mat Sweeper

vi. Seven (7) – Concrete Batch Trucks with Hoppers mounted (six cubic yard minimum)

vii. One (1) – Paper Machine

viii. One (1) – Motor Grader

ix. Two (2) – Water Trucks

x. One (1) – Form breaking machine

xi. Concrete Batch Plant

(5) Financial and physical capability statements.

B-3

NOTE 10: Bidders shall furnish unit prices for each item listed in the schedule requiring a unit price. If the bidder fails to insert a unit price in the appropriate blank for required item(s), but does furnish an extended total, or an estimated amount for such item(s), the Government shall deem the unit price to be the quotient obtained by dividing the extended amount for that line item by the quantity. IF A BIDDER OMITS BOTH THE

UNIT PRICE AND THE EXTENDED TOTAL OR ESTIMATED AMOUNT FOR ANY

ITEM, ITS BID SHALL BE DECLARED NON-RESPONSIVE AND THEREFORE

INELIGIBLE FOR AWARD.

NOTE 11: Any bid may be rejected if the Contracting Officer determines in writing that it is unreasonable as to price. Unreasonableness of price includes not only total price of bid, but the price for individual line items as well. Any bid may be rejected if the prices for any line items or sub line items are materially unbalanced (See FAR 14.404-2).

NOTE 12: RAPID VENDOR PAYMENT. Web based instructions for the submission of invoices;

http://www.mvn.usace.army.mil/BusinessWithUs/Contracting/RapidVendorPayment

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Section Table of Contents

SECTION C1 – DESCRIPTION/SPECIFICATIONS

1 DESCRIPTION OF WORK 1

1.1 Scope 1

1.2 Definitions 1

1.2.1 Square 1

1.2.2 CWT 1

1.3 Location 1

2 PHYSICAL DATA 2

2.1 Access Roads 2

2.2 Reserved 2

2.3 Electricity 2

2.4 Potable Water 2

3 OTHER WORK 2

4 CONTRACT DRAWINGS AND SPECIFICATIONS 2

5 FIELD LAYOUT 3

6 REFERENCES 3

7 MATERIALS 6

7.1 Cementitious Materials 6

7.1.1 Portland Cement 6

7.1.2 Fly Ash 6

7.1.3 Transportation of Bulk Cement and Fly Ash 6

7.1.4 Storage 6

7.1.5 Quality Control and Quality Assurance 6

7.2 Calcium Chloride 7

7.2.1 Quality Control and Quality Assurance 7

7.3 Air-Entraining Admixture 7

7.3.1 Quality Control and Quality Assurance 7

7.4 Water-Reducing Admixture 8

7.4.1 Quality Control and Quality Assurance 8

7.5 Aggregate 8

7.5.1 General 8

7.5.2 Quality Control and Quality Assurance 8

7.5.3 Fine Aggregate 9

7.5.3.1 Storage of Fine Aggregate 9

7.5.4 Coarse Aggregate 9

7.5.4.1 Storage of Coarse Aggregates 10

7.6 Water 10

7.7 Curing Compounds 10

7.7.1 Quality Control and Quality Assurance 10

7.8 Kraft Paper 10

7.8.1 Quality Control and Quality Assurance 11

8 PLANT REQUIREMENTS 11

8.1 Measurement 11

8.2 Weight Batchers 11

8.3 Scales 11

8.4 Interlocks 12

8.5 Moisture Control Meter 12

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8.6 Recorder 12

8.7 Batch Counters 13

8.8 Admixture Dispensers 13

8.9 Sampling 14

8.10 Reserved 14

8.11 Control Equipment Protection 14

8.12 Concrete Mixers 14

8.12.1 General 14

8.12.2 Stationary Mixers 15

8.12.3 Truck Mixers 16

8.12.4 Paving Mixers 16

9 ARTICULATED CONCRETE MATTRESS 16

9.1 Composition 16

9.1.1 Concrete 16

9.1.2 Strength 16

9.1.3 Proportioning of Concrete 17

9.1.3.1 General 17

9.1.3.2 Water Content 17

9.1.3.3 Cementitious Materials Content 17

9.1.3.4 Aggregate Content 17

9.1.3.5 Placeability 17

9.1.3.6 Slump 18

9.1.3.7 Air-Entraining 18

9.1.3.8 Calcium Chloride 18

9.2 Concrete Conveying 18

10 TRIAL OPERATION 19

10.1 Batch Operation 19

11 CASTING 19

11.1 General 19

11.2 Casting Procedure 20

11.2.1 Paper Installation 20

11.2.2 Form Placement 20

11.2.3 Form Release Agent 21

11.2.3.1 Form Release Agent – Commercial Products 22

11.2.3.1.1 Nonpetroleum Based 22

11.2.3.1.2 Petroleum Based 22

11.2.3.2 Form Release Agent – Other Than Commercial Products 22

11.2.3.2.1 General 22

11.2.3.2.2 Acceptance Criteria 22

11.2.3.2.3 Sampling 23

11.2.3.2.4 Analysis 23

11.2.3.2.5 Analytical Requirements 23

11.2.4 Concrete Placement 24

11.2.5 Roughened Finish 25

11.2.6 Form Stripping 26

11.2.7 Form Cleanup 26

12 CURING AND PROTECTION 26

12.1 Warm Weather 26

12.1.1 Ambient Temperature 40 to 70o F 26

12.1.2 Ambient Temperature Above 70o F 27

12.1.3 Curing Compound 27

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12.2 Cold Weather 27

12.3 Rainy Weather 27

13 EXCESS PAPER 28

14 REPAIRING DEFICIENT MATTRESS 28

15 FIELD CONDITIONS 28

15.1 Field Maintenance 29

15.2 Wet Field Conditions 29

15.3 Casting Field Flooding 29

16 RECORDS 29

17 MEASUREMENT AND PAYMENT 29

17.1 Articulated Concrete Mattress 30

17.2 Cement 30

17.3 Fly Ash 30

17.4 Fill, Place and Remove Sandbags 31

17.5 Partial Payments 31

C1-1

SECTION C1 – DESCRIPTION/SPECIFICATIONS

1 DESCRIPTION OF WORK

1.1 Scope

The work to be performed under this contract consists of furnishing all plant, materials, equipment, supplies, labor, and transportation, including, fuel, power, water (except as provided in Section H1 – SPECIAL CONTRACT REQUIREMENTS, paragraphs entitled "GOVERNMENT-FURNISHED FACILITIES" and "IDENTIFICATION OF GOVERNMENT-FURNISHED PROPERTY"), and performing all work as required in casting, finishing and curing squares of articulated concrete mattress at the location and in the quantity shown on the Bid Schedule, in strict accordance with the specifications, schedules and drawings, all of which are made a part thereof, and including such detail drawings as may be furnished by the Contracting Officer from time to time during the prosecution of the work. Upon completion of the Basic Work quantity of mattress to be cast, the Government may require the Contractor to complete all unfinished stacks of mattress as in accordance with the variation in quantity clause of Section F – DELIVERIES OR PERFORMANCE, paragraph entitled "VARIATION IN QUANTITY (FAR 52.211-16 – APR 1984)". The Government may elect to cast all or any portion of the Optional Work quantity specified. The Government may also exercise the Optional Work to fill, place and remove sandbags.

1.2 Definitions

1.2.1 Square

One square (SQ) of articulated concrete mattress as referred to in these specifications consists of one section, approximately 25-feet by 4-feet by 3-inches containing 16 blocks of concrete, cast on a single unit of fabric.

1.2.2 CWT

CWT – is the abbreviation for the term “hundredweight” used to refer to a unit of 100 pounds.

1.3 Location

The casting field is located along the left descending bank of the Mississippi River at mile 265 above Head of Passes near St. Francisville, Louisiana.

C1-2

2 PHYSICAL DATA

2.1 Access Roads

Access to the casting field is as follows: Take LA State Highway 10 to LA 3057 (Commerce Street), bear left unto LA 1258 (Ferdinand Street), turn left onto a gravel road (with gate) which leads to the casting field.

2.2 Reserved

2.3 Electricity

Facilities for commercial electric power service is located at the field and electricity may be procured commercially. The Contractor shall make his/her own arrangements for power.

2.4 Potable Water

Water may be procured commercially, or it may be obtained from the Mississippi River, provided it meets the requirements for water as set out in these specifications.

The Contractor shall provide drinking water for his/her workers and shall make his/her own arrangements for potable drinking water.

3 OTHER WORK

The Government may desire to load completed mattress sections or perform other work on the Government premises or in the immediate vicinity of areas where work is being performed while the Contractor's casting operations are in progress. The Contractor's plant layout and operations shall be such as to avoid interference with loading operations, storage and transportation of materials, storage of existing mattress, casting of additional mattress, or other work not included in this contract.

4 CONTRACT DRAWINGS AND SPECIFICATIONS

Three sets of contract drawings and specifications will be furnished the Contractor without charge except applicable publications incorporated in the specifications by reference. Additional sets will be furnished on request at the cost of reproduction.

The work shall conform to the drawings marked "Mississippi River, Casting Articulated Concrete Mattress, St. Francisville Casting Field, St. Francisville, LA" with titles and file numbers as listed below, all of which form a part of these specifications and are available in the office of the U.S. Army Engineer District, New Orleans, Corps of Engineers, 7400 Leake Avenue, New Orleans, LA.

C1-3

Drawing No. Title File No.

C-01 General Map H-4-46824

C-02 Field Layout H-4-46824

C-03 Typical Layout and H-4-46824 Standard Details

C-04 Steel Form For H-4-46824

Casting Articulated Concrete Mattress

C-05 Red River Landing H-4-46824

Hydrograph

C-06 Baton Rouge Hydrograph H-4-46824

5 FIELD LAYOUT

The initial casting field layout shall be as shown on Drawing No. C-02, entitled "FIELD LAYOUT". After work is underway, the casting field layout and/or order of work may be altered to avoid hampering or being hampered by mat loading operation. Mattress stacks and rows of standard mattress stacks shall be developed from these layouts in a manner similar to that shown on Drawing No. C-03, entitled "TYPICAL LAYOUT and

STANDARD DETAILS”.

6 REFERENCES

The following publications referred to thereafter by basic designation only, form a part of this specification to the extent indicated by the references thereto:

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 33/C 33M (2013) Standard Specification for Concrete

Aggregates

ASTM C 39/C 39M (2015) Standard Test Method for Compressive

Strength of Cylindrical Concrete Specimens

ASTM C 70 (2013) Standard Test Method for Surface Moisture in

Fine Aggregate

ASTM C 94/C 94M (2015) Standard Specification for Ready-Mixed

Concrete

C1-4

ASTM C 136 (2014) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM C 143/C 143M (2012) Standard Test Method for Slump of Hydraulic-

Cement Concrete

ASTM C 150 (2015) Standard Specification for Portland Cement

ASTM C 172 (2014) Standard Practice for Sampling Freshly Mixed

Concrete

ASTM C 231 (2014) Standard Test Method for Air Content of

Freshly Mixed Concrete by the Pressure Method

ASTM C 260 (2010) Standard Specification for Air-Entraining

Admixtures for Concrete

ASTM C 309 (2011) Standard Specification for Liquid Membrane-

Forming Compounds for Curing Concrete

ASTM C 494/C 494M (2015) Standard Specification for Chemical

Admixtures for Concrete

ASTM C 618 (2015) Standard Specification for Coal Fly Ash and

Raw or Calcined Natural Pozzolan for Use in Concrete

ASTM C 1567 (2013) Standard Test Method for Potential Alkali-

Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)

ASTM D 75/D 75M (2014) Standard Practice for Sampling Aggregates

ASTM D 98 (2015) Calcium Chloride

ASTM D 4791 (2010) Flat Particles, Elongated Particles, or Flat and

Elongated Particles in Coarse Aggregate

U.S. ARMY CORPS OF ENGINEERS (USACE) STANDARDS

CRD-C 55 (1992) Within-Batch Uniformity of Freshly-Mixed

Concrete

CRD-C 143 (1962) Meters for Automatic Indication of Moisture in

Fine Aggregate

C1-5

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

CODE OF FEDERAL REGULATIONS (CFR)

40 CFR 261, Subpart C (2005) Characteristics of Hazardous Waste

40 CFR 261, Subpart D (2005) Lists of Hazardous Wastes

40 CFR 261.21 (2005) Characteristics of Ignitability

40 CFR 261.22 (2005) Characteristics of Corrosivity

40 CFR 261.23 (2005) Characteristics of Reactivity

40 CFR 261.24 (2005) Toxicity Characteristic

40 CFR 261.31 (2005) Hazardous Wastes from Non-Specific Sources

40 CFR 261.32 (2005) Hazardous Wastes from Specific Sources

40 CFR 261.33 (2005) Discarded Commercial Chemical Products, Off-specification Species, Container Residues, and Spill Residues Thereof

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST)

HANDBOOK 44 (2013 Edition) Specifications, Tolerances and Other

Technical Requirements for Weighing and Measuring Devices

COMMERCIAL ITEM DESCRIPTION

A-A-203C (Jan 1996) Paper, Kraft, Untreated

ENVIRONMENTAL PROTECTION AGENCY (EPA) PUBLICATION

SW-846 Third Edition (Sept 1986) Test Methods for Evaluating

Solid Waste, Physical/Chemical Methods

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7 MATERIALS

7.1 Cementitious Materials

7.1.1 Portland Cement

Portland Cement shall conform to ASTM C 150, low alkali, Type I or II, including false set requirements, except that the maximum amount of C3A shall be 15 percent.

Cement with a Blaine Fineness of 400 square meters per kilogram or greater shall be considered Type III cement.

7.1.2 Fly Ash

Fly ash shall conform to ASTM C 618, Class C or F, with the Effectiveness in Controlling Alkali-Silica Reaction of Table 3 (ASTM C 618). Test results showing that the proposed combination of cementitious materials and aggregates will expand less than 0.10 percent in 16 days, when tested in accordance with ASTM C 1567, may be substituted for the Effectiveness in Controlling Alkali-Silica Reaction test.

7.1.3 Transportation of Bulk Cement and Fly Ash

When bulk cement and/or fly ash is not unloaded from primary carriers directly into weather tight hoppers at the batching plant, transportation from the railhead, mill, or intermediate storage area to the batching plant shall be accomplished in weather tight trucks, conveyors, or other means which will protect the cement and fly ash completely from exposure to moisture.

7.1.4 Storage

Separate storage facilities shall be provided for cement and fly ash. Immediately upon receipt at the site of the work, cement and fly ash shall be stored in a dry weather tight and properly ventilated structure with adequate provisions for the prevention of absorption of moisture. Charging valves for storage of cement and fly ash shall be clearly marked to prevent inadvertent loading of the wrong material into this structure. All storage facilities shall be subject to approval and shall permit easy access for inspection and identification. In order that cement and fly ash may not become unduly aged after delivery, the Contractor shall use any cement or fly ash, which has been stored at the site for 60 days or more before using cement or fly ash of lesser age. Fly ash or cement obtained from different sources shall not be stored in the same storage bin. The temperature of the cement and fly ash, as delivered to the site, shall not exceed 150o F.

7.1.5 Quality Control and Quality Assurance

The Contractor shall notify the Contracting Officer of the source from which the cement and fly ash will be obtained within ten days after award of the contract.

C1-7

Cement and fly ash will be accepted on the basis of a manufacturer's mill certificate of compliance. Unless otherwise authorized, no cement or fly ash shall be used until a satisfactory manufacturer's mill certificate for that cement or fly ash is in the possession of the Contracting Officer at the site of the work and same has been accepted. If the manufacturer's certificate indicates that the cement or fly ash, which has been delivered, is unsatisfactory, it shall be promptly removed from the site of the work by and at the expense of the Contractor. Fly ash and cement samples will be tested periodically during the casting season, at the Government's expense, to check compliance with the specifications. Cement and/or fly ash, which have not been used within four months after testing, shall be retested at the expense of the Contractor when directed by the Contracting Officer and will be rejected if test results are not satisfactory.

7.2 Calcium Chloride

Calcium chloride shall meet the requirements of ASTM D 98, Type S, Grade N1, N2, or N3.

7.2.1 Quality Control and Quality Assurance

Calcium chloride will be accepted on the basis of a manufacturer's mill certificate or certificate of compliance which certifies that the calcium chloride meets the specified requirements. The certificate shall be furnished in duplicate to the Contracting Officer at the time of delivery.

7.3 Air-Entraining Admixture

The air-entraining admixture shall conform to ASTM C 260 and shall consistently entrain the air content in the specified ranges under field conditions. The air-entraining admixture shall be in a solution of suitable viscosity for field use requiring no further dilution.

7.3.1 Quality Control and Quality Assurance

admixture will be obtained within ten days after award of contract. The admixture will be accepted on the basis of mill certificates or certificates of compliance, which certify that the admixture meets the specified requirements. The admixture may be tested periodically, at the expense of the Government, to check compliance with the specifications. The Contractor shall provide satisfactory facilities for the procurement of test samples by the Contracting Officer. An air-entraining admixture which has been in storage at the project site for longer than six months or which has been subjected to freezing shall be retested at the expense of the Contractor when directed by the Contracting Officer and shall be rejected if test results are not satisfactory.

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7.4 Water-Reducing Admixture

The water-reducing admixture shall conform to the requirements of ASTM C 494/C 494M, Type A.

7.4.1 Quality Control and Quality Assurance

admixture will be obtained within ten days after award of the contract. The admixture will be accepted on the basis of mill certificates or certificates of compliance, which certify that the admixture meets the specified requirements. The admixture will be tested periodically, at the expense of the Government, to check compliance with the specifications. The Contractor shall provide satisfactory facilities for the procurement of test samples by the Contracting Officer. A water reducing admixture which has been in storage at the project site for longer than six months or which has been subjected to freezing shall be retested at the expense of the Contractor prior to its use.

7.5 Aggregate

7.5.1 General

All aggregates used in concrete for casting mats shall be obtained from a listed source in accordance with Section H1 – SPECIAL CONTRACT REQUIREMENTS, paragraph entitled "AGGREGATE SOURCES”. Aggregate, as delivered to the mixer, shall consist of clean, hard, and uncoated particles.

7.5.2 Quality Control and Quality Assurance

The Contractor shall notify the Contracting Officer of the sources from which the aggregates will be obtained within ten days after award of contract. The aggregate will be accepted on the basis of Certificates of Compliance with accompanying gradation tests, which certify that the aggregates meet the specified requirements.

Gradation tests shall be accomplished by the Contractor from materials at the aggregate source(s) prior to shipment to the Casting Field. During construction, aggregate will be sampled in accordance with ASTM D 75/D 75M, as delivered to the mixer, to determine compliance with the specifications. The Contractor shall provide facilities and labor as may be necessary for the ready procurement of representative test samples. Samples from the weigh batcher shall be obtained when directed by the Contracting Officer and under his/her supervision. The Government will test such samples at its expense using appropriate Corps of Engineers' and ASTM testing methods. Tests of aggregates at various stages in the casting process and handling operations will be made at the discretion of the Contracting Officer.

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7.5.3 Fine Aggregate

Fine aggregate shall consist of natural sand, or a combination of natural and manufactured sands. The quality of the fine aggregates shall conform to ASTM C 33/C 33M. Fine aggregate shall be graded from fine to coarse and the gradation shall be within the following limits as delivered to the mixer or as incorporated in the mixed concrete when tested in accordance with ASTM C 136:

Sieve Size Percent Passing 3/8" 100 No. 4 95 – 100 No. 16 45 – 90 No. 50 7 – 30 No. 100 0 – 7 No. 200 0 – 3

7.5.3.1 Storage of Fine Aggregate

Fine aggregate shall be stored in such a manner as to avoid the inclusion of any foreign materials. The storage piles shall be constructed so as to prevent segregation. The storage of the material in storage piles and its removal therefore shall be accomplished in such a manner as to result in maintaining uniformity of gradation. All fine aggregate shall remain in the stockpile for at least 96 hours prior to use. Sufficient aggregate shall be maintained at the site at all times to permit continuous placement of concrete at the specified rate. Any unacceptable material that is introduced to the stockpile shall be promptly separated from previously accepted material and removed from the stockpiled area before continuation of casting or within 24 hours if occurring during a period of no casting.

7.5.4 Coarse Aggregate

Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, or a combination thereof. Materials from different aggregate sources shall be stockpiled separately. When required, fines shall be removed from the coarse aggregates by adequate washing, or another suitable method approved by the Contracting Officer.

The quantity of flat and/or elongated particles in the separate size groups of coarse aggregates, as defined and determined by ASTM D 4791, shall not exceed 25 percent. The quality of coarse aggregate shall conform to ASTM C 33/C 33M, Class 4M. Coarse aggregate shall conform to the following gradation requirements as delivered to the mixer or as incorporated in the mixed concrete when tested in accordance with ASTM C 136:

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Sieve Size Percent Passing 1-1/2" 100 1" 90 – 100 1/2" 25 – 60 No. 4 0 – 10 No. 8 0 – 5 No. 200 0 – 1

7.5.4.1 Storage of Coarse Aggregates

Coarse aggregate storage piles shall be built adjacent to the batch plant and in such manner as to avoid the inclusion of any foreign material. Materials from different aggregate sources shall be stockpiled separately. Coarse aggregate shall remain in the stockpile for at least 48 hours prior to use. The storage piles shall be constructed so as to prevent segregation and to provide for drainage away from the storage piles.

The deposition of the material in storage and its removal therefore shall be accomplished in such a manner as to result in maintaining the uniformity of the gradation. Sufficient aggregate shall be maintained at the site at all times to permit continuous placement of concrete at the specified rate. Any unacceptable material that is introduced to the stockpile shall be promptly separated from previously accepted material and removed from the stockpiled area before continuation of casting or within 24 hours if occurring during a period of no casting.

7.6 Water

Water for mixing shall be clean and potable, except that non-potable water may be used if it meets the requirements of CRD-C 400. Water for curing shall not contain any substance that is injurious to the concrete.

7.7 Curing Compounds

Curing compounds shall be of the surface membrane type, conforming to ASTM C 309, Type 2.

7.7.1 Quality Control and Quality Assurance

The Contractor shall furnish certificates of compliance, at or before the time of delivery, in duplicate, to the Contracting Officer, which certify that the curing compound meets the specified requirements.

7.8 Kraft Paper

The paper used as separators between mattress squares shall not be less than 48 inches wide and not greater than 50 inches in width and shall conform to the maximum requirements set out in Commercial Item Description Notice – CID A-A- 203C, Style 1 with the exception of the requirements specified herein. The paper

C1-11 basis weight shall be not less than 99 pounds; that is, 500 sheets, 24 inches by 36 inches shall weigh not less than 99 pounds. The Contractor may, at his/her option and at no additional cost to the Government, elect to use a heavier weight paper.

7.8.1 Quality Control and Quality Assurance

The Contractor shall either furnish mill certificates or certificates of compliance, in duplicate, to the Contracting Officer which certify that the paper meets the specified requirements.

8 PLANT REQUIREMENTS

8.1 Measurement

All materials entering into the concrete shall be mechanically batched and measured by weight except the admixtures which may be batched by volume and except water may be batched by weight or volume. One gallon of water will be considered as 8.33 pounds in weight.

8.2 Weight Batchers

The weight batchers shall be arranged to permit the convenient addition or removal of material. The weight batchers shall be so constructed and arranged that the sequence and timing of batcher discharge gates can be controlled to produce a ribboning and mixing of the aggregates, water, and of the cement and fly ash with aggregates as the materials pass through the charging hopper into the mixer. The plant shall include provisions to facilitate the inspection of all operations at all times.

Delivery of materials from the batching equipment shall be within the following limits of accuracy:

Material Percent Cement and Fly Ash 0 – 2 Water (+/-)1 Aggregate (+/-)2 Admixtures (+/-)3

8.3 Scales

The batch plant shall include adequate facilities for the accurate measurement and control of each of the materials entering each batch of concrete. The accuracy of weighing equipment shall conform to the applicable requirements of NIST Handbook 44, except that the accuracy shall be within 0.2 percent of scale capacity. The Contractor shall provide standard test weights and any other auxiliary equipment required for checking the operating performance of each scale or other measuring device. Periodic tests shall be made in the presence of a Contracting Officer in such a manner and at such intervals as may be directed. Upon completion of each check

C1-12 test and before further use of the indicating, recording, or control devices, the Contractor shall make such adjustments, repairs or replacement as may be required for satisfactory performance. Each weighing unit shall include a visible springless dial or electronic indicator, which shall indicate the scale load at all stages of the weighing operation or shall include a beam scale with a beam balance indicator which will show the scale in balance at zero load at any beam setting. The indicator shall have an over and under travel equal to at least five percent of the capacity of the beam. The weighing equipment shall be arranged so that the concrete plant operator can conveniently observe the dials or indicators.

8.4 Interlocks

Batchers and mixers shall be interlocked so that:

(1) The charging mechanism of each batcher cannot be opened until the scale has returned to zero,

(2) The charging mechanism cannot be opened if the discharge mechanism is opened,

(3) The discharge mechanism cannot be opened if the charging mechanism is open,

(4) The discharge mechanism cannot be opened until the designated weight has been reached within the allowable tolerance,

(5) One admixture is batched automatically with the water,

(6) Each additional admixture is batched automatically with a separate portion of the water or with the fine aggregate, and

(7) The mixers cannot be discharged until the required mixing time has elapsed.

8.5 Moisture Control Meter

The plant shall be capable of ready adjustment to compensate for the varying moisture content of the aggregate in order to change the weights of the materials being batched. An electric moisture meter, complying with the provisions of CRD-C 143, shall be provided for measurement of moisture in the fine aggregate. The sensing element shall be arranged so that the measurement is made near the batcher charging gate of the sand bin or in the sand batcher.

8.6 Recorder

An accurate recorder shall be provided and shall conform to the following requirements:

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(1) The recording units shall be completely housed in a single cabinet, which shall be capable of being locked.

(2) The recorder shall produce a graphical or digital record on a single visible chart or tape which shall indicate the weight or volume of each material in the batchers at the conclusion of the batching cycle. The record shall be produced prior to delivery of the materials to the mixer. After the batchers have been discharged, the recorder shall indicate the return of the batcher to the empty condition.

(3) The chart or tape shall be so marked that each batch may be permanently identified and so that variations in batch weights of each type of batch can be readily observed.

(4) The chart or tape shall show the date and time of day at intervals of not more than 15 minutes. Graduation lines on the cementitious materials chart shall be at intervals of not more than 20 pounds.

(5) The recorded chart or tape shall become the property of the Government.

(6) The recorder shall be placed in a position convenient for observation by the concrete plant operator and the Contracting Officer, and mounted to prevent excessive vibration, which causes inaccurate readings.

(7) The recorded weights or volumes, when compared to the weights or volumes actually batched, shall be within (+/-) two percent.

8.7 Batch Counters

The plant shall include devices for automatically counting the total number of batches of all concrete batched.

8.8 Admixture Dispensers

An accurate mechanical system for measuring and dispensing each admixture shall be provided. Each system shall be capable of ready adjustment to permit varying the quantity of admixtures to be batched. Each admixture shall be added to the batch in a separate portion of the mixing water or in a separate portion of the fine aggregate in a manner to ensure uniform distribution of the admixtures throughout the batch. The dispensing systems shall provide a convenient means of visually observing from the control panel the admixture in process of being batched or discharged.

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8.9 Sampling

The Contractor shall provide suitable facilities and labor for obtaining representative samples of concrete from the mixer or the wet batch hopper for Contractor quality control and Government quality assurance testing. All necessary platforms, tools and equipment for obtaining samples shall be furnished by the Contractor.

8.10 Reserved

8.11 Control Equipment Protection

The indicating, recording, and control equipment shall be sufficiently protected against exposure to dust, moisture and vibration so there will be no interference with proper operation of the equipment.

8.12 Concrete Mixers

8.12.1 General

Mixers may be stationary mixers, truck mixers, paving mixers, or turbine-type mixers of approved design. The mixers shall have a rated capacity of at least 27 cubic feet of mixed concrete and shall not be charged in excess of the capacity recommended by the manufacturer. Mixers shall be capable of combining the materials into a uniform mixture and of discharging this mixture without segregation. Each stationary and paving mixer shall be provided with an acceptable device to lock the discharge mechanism until the required mixing time has elapsed. Truck mixers shall be equipped with accurate revolution counters. The mixers shall be operated at the drum or blade speed designated by the manufacturer on the nameplate. The acceptability of truck mixers will be determined by uniformity tests as required by ASTM C 94/C 94M. The mixing periods specified herein are predicated on proper control of the speed of rotation of the mixer drum or mixing blades and on proper introduction of the materials into the mixer. The mixing time of stationary or paving mixtures shall be increased when such increase is necessary to secure the required uniformity of the concrete or when test samples of concrete taken from the first, middle and last portions of the mixer discharge is less than any of the following requirements when tested in accordance with the provisions of CRD-C 55. When authorized by the Contracting Officer, the mixing time may be reduced to the minimum time required to meet all the following requirements:

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Maximum Allowable Variation of Any One Test Value from

Test the Average of Three

Weight per cubic foot of mortars (+/-)1.6 calculated to an air-free basis, lb/ft3

Air content, volume percent of (+/-)1.0 concrete

Slump, inches (+/-)1.0

Coarse aggregate content, portion (+/-)6.0 by weight of each sample retained on No. 4 sieve, percent

Average compressive strength at (+/-)10.0 seven days, percent

Water content, portion by weight (+/-)1.5 of each sample passing No. 4 sieve, percent

When the Contractor proposes to reduce the mixing time, uniformity tests at reduced mixing time will be made by the Government, at the Contractor's expense, to determine whether the reduced mixing time meets the requirements of the specifications. Excessive over-mixing requiring additions of water will not be permitted. The mixers shall be maintained in satisfactory operating condition, and mixer drums shall be kept free of hardened concrete. Mixer blades shall be replaced when worn more than ten percent of their initial depth. Should any mixer at any time produce unsatisfactory results, its use shall be promptly discontinued until it is repaired. Suitable facilities shall be provided for obtaining representative samples of concrete for uniformity tests. All necessary platforms, tools, labor and equipment for obtaining samples shall be furnished by the Contractor.

8.12.2 Stationary Mixers

If no uniformity test data are available, the mixing time for each batch after all solid materials are in the mixer shall be one minute for mixers having a capacity of one cubic yard, provided that all of the mixing water is introduced before 1/4 of the mixing time has elapsed. For mixers of larger capacities, the minimum mixing time shall be increased 15 seconds for each additional cubic yard or fraction thereof of concrete mixed. When a stationary mixer is used for partial mixing of the concrete (shrink mixing), the mixing time in the stationary mixer may be reduced to the minimum necessary to intermingle the ingredients (about 30 seconds).

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8.12.3 Truck Mixers

Truck mixers and the mixing of concrete therein shall conform to the requirements of ASTM C 94/C 94M. A truck mixer may be used either for complete mixing (transit-mixed) or to finish the partial mixing accomplished in a stationary mixer (shrink-mixed). Each truck shall be equipped with two counters from which can be determined the number of revolutions at mixing speed and the number of revolutions at agitating speed.

8.12.4 Paving Mixers

Paving mixers, if used, shall be used at the site of the work. Paving mixers may be either single compartment drum or multiple compartment drum type. Multiple compartment drum paving mixers shall be properly synchronized and the mixing time shall be determined by including the time required to transfer the concrete between compartments of the drum. If no uniformity test data are available, the mixing time for each batch, after all solid materials are in the mixer drum shall be one minute for mixers having a capacity of one cubic yard, provided that all the mixing water is introduced before 1/4 of the mixing time has elapsed. For mixers of larger capacities, the minimum mixing time shall be increased 15 seconds for each additional cubic yard or fraction thereof of concrete mixed. Vehicles used in transporting material from the batching plant to the mixers shall have bodies or compartments of adequate capacity to carry the materials and to deliver each batch, separate and intact, to the mixer. Except as otherwise approved by the Contracting Officer, loose cement and fly ash shall be transported from the batching plant to the mixers in separate boxes or compartments which shall be equipped with windproof and rainproof covers.

9 ARTICULATED CONCRETE MATTRESS

9.1 Composition

9.1.1 Concrete

Concrete for articulated mattress shall be composed of cementitious materials, water, fine and coarse aggregate, air-entraining and water-reducing admixtures, and at the option of the Contractor, an accelerating admixture (calcium chloride).

9.1.2 Strength

Concrete for articulated mattress shall achieve a minimum 90-day compressive strength of 3,000 pounds per square inch (psi).

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9.1.3 Proportioning of Concrete

9.1.3.1 General

The proportion of all material entering into the concrete shall be as directed by the Contracting Officer. The Contractor shall provide all necessary equipment and plant to determine and control the actual quantities of material entering each batch. The proportions will be changed by the Contracting Officer whenever such change is necessary in order to maintain the standard of quality required.

9.1.3.2 Water Content

The total water content of all concrete mixtures including moisture in fine and coarse aggregates shall not exceed the amount in the Government supplied mix design.

9.1.3.3 Cementitious Materials Content

The cementitious materials content of the concrete will range from an approximate minimum of three to an approximate maximum of five hundredweights per cubic yard, depending on size, type, and gradation of aggregate used, and on the structural requirements as determined by the Contracting Officer. The cementitious material shall consist of a blend of 65 to 75 percent portland cement and 25 to 35 percent fly ash by absolute volume of the total cementitious material. The Contractor may adjust the mix by substituting portland cement for fly ash in order to accelerate set time and/or strength gain. Additional cost resulting from such adjustment shall be at no additional expense to the Government. The Government reserves the right to change the mix design by directing substitution of cement for fly ash. When so directed, payment for theoretical batch weights of cement and fly ash in the new mix will be paid at the contract unit price.

9.1.3.4 Aggregate Content

Concrete mixes will be designed to use the maximum quantity of coarse aggregate placeable in the various parts of the form and the aggregate plant shall be designed on this basis.

9.1.3.5 Placeability

The concrete mixtures, which have been designed and tested in the laboratory, will be adjusted in the field from time to time to meet the varying conditions encountered during casting operations. The water content of all concrete mixtures will be the minimum necessary to properly place the mixture being used and shall not exceed the amount specified in the Government mix design.

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9.1.3.6 Slump

The slump will be stipulated by the Contracting Officer and shall be three inches plus or minus one inch as determined by ASTM C 143/C 143M. Concrete sampling shall be done in accordance with ASTM C 172.

9.1.3.7 Air-Entraining

An air-entraining admixture shall be added at the mixer to each batch of concrete.

The quantity of admixture used shall be such as to control the quantity of entrained air within the concrete to within the limits of four to six percent as determined by ASTM C 231 when the concrete is discharged from the mixer. The intent is to maintain the entrained air in the concrete as near as practicable to 5.5 percent while allowing some latitude for individual batches. Concrete sampling shall be done in accordance with

ASTM C 172.

9.1.3.8 Calcium Chloride

At the Contractor's option and expense, a solution not exceeding two pounds of crystal or pellet calcium chloride per hundredweight of cement may be used in the concrete mixture. The calcium chloride shall be dissolved in water in the ratio of one pound of crystals or pellets to two pounds of water and the mixing solution used to replace a similar quantity of the mixing water. Should a calcium chloride solution be used, none of the other conditions of the specifications applying to mixing, placing, or curing the concrete will be waived. To facilitate the maintenance of a workable mixture and good project records, the Contractor shall, at the start of casting operations each day, inform the Contracting Officer as to the quantity of calcium chloride to be used. He/she shall continue such notification approximately 20 minutes in advance of each change in quantity of calcium chloride throughout the day.

9.2 Concrete Conveying

Concrete shall be conveyed from mixer to forms as rapidly as practicable, by methods, which will prevent segregation or loss of ingredients. The concrete mix shall be so controlled that suitable workability at the forms will be obtained at all times without the use of excessive water. Design of the transporting equipment shall be of such a nature as to allow discharge of the concrete into the forms at all heights of the stacks without addition of excessive water. Concrete shall be placed before initial set has occurred and unless otherwise authorized not more than 45 minutes after introduction of water or aggregate to the cementitious materials.

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10 TRIAL OPERATION

10.1 Batch Operation

Not less than 14 days prior to commencement of mat casting the Contractor shall make a full-scale trial test of the batching and mixing plant for each mix design to be used during this casting contract in order to check operational efficiency. The Contractor shall provide a minimum of 48 hour notice of the beginning of trial batch operations.

Government QA testing of the batching and…