Amendment_A001_WeberStreet.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

N/A

PAGE

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE NO. 5. PROJECT NO. (If applicable)

A001 12/9/13 N/A AK IRR WRAN 2012(1)

WEBER STREET

RECONSTRUCTION

6. ISSUED BY CODE N/A 7. ADMINISTERED BY (If other than Item 6) CODE N/A

Department of Transportation Federal Highway Administration 610 East Fifth Street Vancouver WA 98661-3801

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and Zip Code) 9A. AMENDMENT OF SOLICITATION NO.

X

DTFH70-14-B-00002

9B. DATED (SEE ITEM 11)

11/25/2013

10A. MODIFICATION OF CONTRACT/ORDER NO.

N/A

10B. DATED (SEE ITEM 13)

CODE: N/A FACILITY CODE: N/A N/A

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

| X | The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers (__ ) is extended, ( x ) is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

N/A

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A THIS CHANGE ORDER IS ISSUED PURSUANT TO (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN

ITEM 10A.

N/A

B THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (Such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

N/A

C THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

N/A

D OTHER (Specify type of modification and authority) N/A

E. IMPORTANT: Contractor n/a is not, n/a is required to sign this document and return n/a copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

AK IRR WRAN 2012(1), WEBER STREET RECONSTRUCTION

Amendment A001 is issued to revise the following:

Completes Section 552

ENCLOSURES: Page F-12a through- F-12f

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15a. NAME AND TITLE OF SIGNER (Type or print) 15a. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

N/A

15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

BY_________________________________________ BY N/A___________________________ N/A (Signature of person authorized to sign) (Signature of Contracting Officer)

NSN 7540-01-152-8070

PREVIOUS EDITION NOT USABLE

30-105 STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

F-12a

Special Contract Requirements Project: AK IRR WRAN 2012(1), Weber Street Reconstruction

Delete Table 552-1 and substitute the following:

Table 552-1 Composition of Concrete

Class of

Concrete

Minimum Cement Content

(pounds/yd3)

Maximum W/C Ratio

Slump(1) (inches)

Nominal Maximum Aggregate Size(5)

(inches)

A 611 0.49 2 to 4 1½

A(AE) 611 0.44 1 to 4 1½

B 517 0.58 2 to 4 2½

B(AE) 517 0.58 2 to 4 2½

C 658 0.49 2 to 4 ¾

C(AE) 658 0.44 1 to 3 ¾

D(AE)(2) 611 0.40 1 to 3 1½

E(AE)(3) 611 0.40 4 to 6(4) ¾

P (Prestressed) 658 0.44 0 to 4 1

P(AE) 658 0.44 0 to 4 1

Seal 658 0.54 4 to 8 1½

Synthetic fiber (2)(7)

611(6) 0.49 1 to 3 1½

Revised by Amendment A001

F-12b

Delete Table 552-2 and substitute the following:

Table 552-2 Minimum Air Content for Air Entrained Concrete

Nominal Maximum Aggregate Size(1)

As Delivered Minimum Air Content (2) (3) (%)

2½ inch 3.5

2 inch 3.5

1½ inch 4.0

1 inch 4.5

¾ inch 4.5

½ inch 5.5

(1) Meet the processing requirements of AASHTO M 43, Table 1 – Standard Sizes of Processed Aggregate.

(2) These air contents apply to the total mix. When testing these concretes, aggregates larger than 1½ inches is removed by handpicking or sieving, and air content is determined on the minus 1½ inches fraction of the mix. Air content of the total mix is computed from the value determined on the minus 1½ inches fraction.

(3) For P(AE) concrete, reduce the as delivered minimum air content by 1.0 % and use a maximum air content of 6.0 percent.

Delete Table 552-3 in paragraph (v) and substitute the following:

Table 552-3 Required Average Compressive Strength When Data Are Not Available to Establish a Standard Deviation

Specified Compressive

Strength (f’c)

(pounds per square inch)

Required Average Compressive Strength (f’cr)

(pounds per square inch)

Less than 3000 f’c + 1000

3000 to 5000 f’c + 1200

Over 5000 1.10f’c + 700

F-12c

552.03 Measuring Material. Add the following:

Synthetic Fiber -3%, +5%

552.07 Mixing. Amend as follows:

Add the following to paragraph (a):

Add synthetic fibers with the aggregates or immediately after aggregates are introduced into the mixer. Prevent fibers from clumping before entering the mixer.

Add the following to paragraph (b):

Add synthetic fibers last. Do not add clumped fibers. Rotate mixer drum fast enough to disperse fibers as they are added to the mixer. After all fibers have been introduced into the mixer, slow to rated mixing speed and mix for a minimum of 40 revolutions or until the fibers are homogeneously mixed.

552.08 Delivery. Delete paragraph (a) and substitute the following:

(a) Truck mixer/agitator. Use the agitating speed for all rotation after mixing. When a truck mixer or truck agitator is used to transport concrete that is completely mixed in a stationary central construction mixer, mix during transportation at manufacturer's recommended agitating speed.

If the concrete has not obtained an initial set, water and admixtures in the approved mix design may be added one time at the project to obtain the required slump or air content. The total of all water in the mix shall not exceed the maximum water/cement ratio of the approved mix design. Add synthetic fibers last. Do not add clumped fibers. Rotate mixer drum fast enough to disperse fibers as they are added to the mixer. Remix the concrete and added water or admixtures with 30 revolutions at mixing speed. If fibers were added, slow to rated mixing speed and mix for a minimum of 40 revolutions or until the fibers are homogenously mixed.

After the initial introduction of mixing water to cement or cement to aggregates, complete the remixing within the time specified in Table 552-4. After the beginning of the addition of the cement, complete the discharge of the concrete within the time specified in Table 552-4.

Do not exceed 130 total revolutions at mixing speed, including both initial mixing and remixing. Do not exceed 300 total revolutions, including both mixing and agitating speed.

552.09 Quality Control of Mix. Delete the text of paragraph (b)(4) and substitute the following:

(4) Take samples according to AASHTO T 141 from specified loads. Composite samples are not required. The point of sampling is from the discharge stream at the point of placement. Provide cylinder molds. Make at least 4 compressive strength test cylinders for 6-inch by 12-inch specimens or 5 compressive strength cylinders for 4-inch by 8-inch, F-12d provide the appropriate initial curing, and carefully transport the cylinders to the project curing facility. Two 6-inch by 12-inch or three 4-inch by 8-inch cylinders will be used for 28-day compressive strength tests. The remaining cylinders will be used for verification, projected strengths, or other purposes specified. Assist in the performing of other tests as requested.

After initial curing, furnish and maintain a suitable environment to cure cylinders according to WFLHD T 23-94. Provide suitable containers to protect and continue the curing of cylinders while transporting. Deliver cylinders to the Vancouver Laboratory according to Subsection 154.02. Cylinders will be tested at 7, 14, and 28 days from the date molded. Ensure cylinders arrive at the Vancouver Laboratory at least 1 day before the designated test date.

552.12 Construction Joints. Delete the third paragraph and substitute the following:

When the joint is between two fresh concrete placements, rough float the first placement to thoroughly consolidate the surface and leave the surface in a roughened condition. Clean the joint surface of laitance, curing compound, and other foreign material. Use an abrasive blast or other approved method to expose the aggregate on the joint surface. Re-tighten forms where the joint overlaps the first placement. Immediately before placing new concrete, flush the joint surface with water and allow to dry to a surface dry condition.

552.14 Finishing Plastic Concrete. Amend as follows:

Add the following to the first paragraph of 552.14(c):

Provide a grooved finish on synthetic fiber concrete.

Add the following to the first paragraph of 552.14(c)(1):

Saw grooved finish on synthetic fiber concrete.

552.16 Finishing Formed Concrete Surfaces. (Added paragraph).

(h) Class 8 - Refinishing. Clean and refinish according to the appropriate class any concrete surfaces which are exposed to view (e.g., piers, columns, web walls, etc.) and have become streaked and unsightly due to spilled mortar, leaching, or some other cause.

552.19 Acceptance. Delete the fourth paragraphs and substitute the following:

Concrete compressive strength will be evaluated under Subsection 106.05. The lower specification limit is the minimum required compressive strength at 28 days (fc’) specified in the contract. A single compressive strength test result is the average result from 2 6-inch by 12-inch cylinders or 3 4-inch by 8-inch cylinders cast from the same load and tested at 28 days.

F-12e

Delete Table 552-9 and substitute the following:

T ab le

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