Amendment 0001 10-B-0004.pdf

W68SBV92941196 324590

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

Changes are made to Standard Form 1442 and the technical specifications as indicated on the attached pages. Bid opening remains unchanged at: 2:00 pm, Pacific Time, on May 25, 2010.

FY 2010 ARRA CONSTRUCTION PROJECT: ROAD REPAIR/PAVING, LOWER GRANITE AREA

1. CONTRACT ID CODE PAGE OF PAGES

J

FAR (48 CFR) 53.243

1 2

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 18-May-2010

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912EF-10-B-0004

X 9B. DATED (SEE ITEM 11)

22-Apr-2010

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

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 Offer is extended, X is not extended.

Offer 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)

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.

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).

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

D. OTHER (Specify type of modification and authority)

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

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

18-May-2010

CODE

USAED, WALLA WALLA - CONTRACTING DIV.

PHYLLIS L. BUERSTATTE

201 N. THIRD AVENUE

WALLA WALLA WA 99362-1876

W912EF 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EF-10-B-0004

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

A. Bid opening remains unchanged as a result of this Amendment 0001. Bids must be received no later than 2:00 pm, Pacific Time, on May 25, 2010.

B. Bidders must acknowledge receipt of this amendment. See Standard Form 30 for methods of acknowledging solicitation amendments.

C. The following changes are made to the solicitation:

1. Standard Form 1442. The title of the project has been corrected to reflect that work is being done in the Lower Granite area. The correct project title is: Fiscal Year 2010 ARRA CONSTRUCTION PROJECT: ROAD

REPAIR/PAVING AT LOWER GRANITE AREA.

2. Technical Specifications are changed as follows:

1. Revised Section 31 00 00.10 28 “MISCELLANEOUS SITEWORK” as follows:

a. Revised paragraph: 3.1, “EXISTING PARKING WHEEL STOPS”

2. Revised Section 32 12 16.00 28 “ASPHALT CONCRETE OVERLAY” as follows:

a. Revised paragraph: 1.2, “REFERENCES”, updated references ASTM C 136, ASTM D 979, ASTM D 2172, and ASTM E 329.

b. Revised paragraph: 1.4, “SUBMITTALS”, revised the SD-06 and SD-11 submittals.

c. Revised all of the sub paragraphs under paragraph 3.6 “CONTRACTOR QUALITY

CONTROL”

(End of Summary of Changes)

ARRA Project Road Repair/Paving 2010 W912EF-10-B-0004 Amend 1

SECTION TABLE OF CONTENTS

DIVISION 31 - EARTHWORK

SECTION 31 00 00.10 28

MISCELLANEOUS SITEWORK

PART 1 GENERAL

1.1 REFERENCES

1.2 SCOPE

1.3 STATE STANDARDS

1.4 DEFINITIONS

1.4.1 Satisfactory Materials

1.4.2 Unsatisfactory Materials

1.5 SUBMITTALS

PART 2 PRODUCTS

2.1 PARKING WHEEL STOPS

2.2 EXTRUDED CONCRETE CURB

2.2.1 Concrete Mix

2.2.2 Epoxy

2.2.2.1 Dowell Pins

PART 3 EXECUTION

3.1 EXISTING PARKING WHEEL STOPS

3.1.1 EXTRUDED CONCRETE CURB

3.2 SPEED BUMPS

-- End of Section Table of Contents --

31 00 00.10 28

G4EDDRJR

Line

This page intentionally left blank

SECTION 31 00 00.10 28

MISCELLANEOUS SITEWORK

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM C 881/C 881M (2002) Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete

ASTM D 2487 (2006e1) Soils for Engineering Purposes (Unified Soil Classification System)

ASTM C 94 (1994) Ready-Mixed Concrete

1.2 SCOPE

This SECTION specifies the requirements for miscellaneous sitework; work includes, but is not limited to, the following:

a) Parking wheel stops.

b) Extruded concrete curb.

All miscellaneous site work not included as a separate pay item shall be considered incidental to the work at each site and no separate payment will be made.

1.3 STATE STANDARDS

The specification requirements for the various sitework items shall be as specified herein and shall conform to the State Standards for the state in which the work is to be performed. In the case of conflicts, the more stringent criteria shall apply. Applicable State Standards shall include the following:

a. Washington State Department of Transportation, 2008 Standard Specification for Road, Bridge, and Municipal Construction.

b. Idaho Transportation Department, 2004 Standard Specification for Highway Construction.

1.4 DEFINITIONS

1.4.1 Satisfactory Materials

Satisfactory materials comprise any materials classified by ASTM D 2487 as GW, GP, GM, GP-GM, GW-GM, GC, GP-GC, GM-GC, SW, SP. Satisfactory materials

31 00 00.10 28 for grading comprise stones less than 8 inches, except for fill material for pavements and railroads which comprise stones less than 3 inches in any dimension.

1.4.2 Unsatisfactory Materials

Materials which do not comply with the requirements for satisfactory materials are unsatisfactory. Unsatisfactory materials also include man-made fills; trash; refuse; backfills from previous construction; and material classified as satisfactory which contains root and other organic matter or frozen material. Notify the Contracting Officer when encountering any contaminated materials.

1.5 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

Extrusion Machine

Concrete Mix for Extrusion Curb

Compressive Strength Test Results; G, GT

Type II Epoxy Resin

PART 2 PRODUCTS

2.1 PARKING WHEEL STOPS

Both new and reused parking wheel stops will be used. The new wheel stops shall be eight inches wide, four inches high, and six feet long, with two stake pins as indicated.

2.2 EXTRUDED CONCRETE CURB

This product consists of a six inch tall, ten inch wide, unreinforced concrete curb. The curb is constructed using an extrusion placement machine that yields the cross section indicated.

2.2.1 Concrete Mix

The concrete mix for extrusion curb shall include cement, fine and coarse aggregate, water, and air that yields a smooth, defect-free curb surface with the desired cross section. Except as modified below, the concrete mixture shall meet the requiremens of ASTM C 94:

a) The cement shall be Type II.

b) The concrete shall have a minimum entrained air content of 5%.

c) The concrete shall have a minimum 28-day compressive strength of 4,000 psi.

2.2.2 Epoxy

Epoxy resin adhesive shall be used to attach the curb to concrete surface.

The Epoxy shall meet the following criteria:

a) The material shall be a 2-component epoxy resin for bonding concrete to hardened concrete.

b) The material shall have a concrete gray color when cured.

c) The material shall be a Type II Epoxy Resin per ASTM C 881/C 881M.

2.2.2.1 Dowell Pins

The dowell pins shall be straight lengths of No. 4, Grade 60 concrete reinforcing steel. Dowell pins shall not be used along curb segments on concrete. Dowell pins or epoxy resin adhesive shall be used along segments of curb on asphalt concrete surfaces.

PART 3 EXECUTION

3.1 EXISTING PARKING WHEEL STOPS

Existing concrete wheel stops shall be removed before any global surface treatments of pavements such as overlays. Care shall be taken to minimize damage to the wheel stops or pavements during removal. Any damage done to the asphalt by the Contractor during wheel stop removal shall be repaired by the Contractor as specified in Section 32 01 17.69 28 before any asphalt work and paint marking starts. The following requirements also apply:

a) Damaged wheel stops and stake pins shall be removed from the site and properly disposed of as specified in Section 01 11 01.00 28.

b) Contractor shall install new wheel stops in accordance with applicable State Standards. The wheel stops shall be centered in the stalls, perpendicular to the stall stripes.

c) Extruded curb will replace existing wheel stops in areas indicated.

3.1.1 EXTRUDED CONCRETE CURB

Extruded cement concrete curb shall be placed, shaped, and compacted true to line and grade with an approved extrusion machine. The extrusion machine shall be capable of shaping and thoroughly compacting the concrete to the required cross section.

a) Prior to placement of epoxy or concrete, contact surfaces (beneath the curb) shall be clean and dry, free of debris, dirt, dust, oil, or other loose or otherwise deleterious materials.

b) The concrete mixture shall be homogeneously mixed when delivered to the hopper of the curb machine. If used, readymix concrete shall meet the requirements of ASTM C 94. The curb laying machine shall be adjusted properly to form and compact the cement mix for the concrete curb.

d) Vertical control joints shall be located at intervals along the curb. Maximum curb length between joints shall be nine feet. Closer spacing shall be used where the joints can line up with existing

31 00 00.10 28 concrete joints and around bends with a curve radius less than six feet. Along curved segments having a radius less than six feet, joints shall be located at the approximate apex points and tangent points of the curves.

e) Type1D, Class B liquid curing compound shall be used. Sufficient pigment shall be present so that the sprayed compound is easily discernible.

f) Prior to construction, the Contractor shall provide compressive strength test results confirming the 7-day and 28-day strength for samples of the concrete mix proposed for use on the project.

g) The pins shall be located along the centerline of the curb. The pins shall be at least 12 inches in length, and shall protrude above the existing surface by 4 inches, which is 2 inches below the top of the curb.

h) The pins shall be located so there is at least one pin between control joints.

3.2 SPEED BUMPS

Existing speed bumps shall be preserved during surfacing and repainted.

-- End of Section --

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 12 16.00 28

ASPHALT CONCRETE OVERLAY

PART 1 GENERAL

1.1 SCOPE OF WORK

1.2 REFERENCES

1.3 TOLERANCES

1.3.1 Asphalt Cement Content

1.3.2 Weights of Aggregates

1.3.3 Asphalt Concrete Surface Parallel to the Roadway

1.3.4 Asphalt Concrete Surface Perpendicular to the Roadway

1.4 SUBMITTALS

1.5 CONTRACTOR QUALITY CONTROL

1.5.1 Aggregate Source Approval

1.5.2 Nuclear Gauge Submittal

1.5.3 Job Mix Formula

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Aggregates

2.1.1.1 General

2.1.1.2 Durability

2.1.1.3 Fracture Requirements

2.1.1.4 Sand Equivalent

2.1.1.5 Wood Waste

2.1.1.6 Gradation

2.1.2 Mineral Filler

2.1.3 Asphalt Cement

2.1.4 Antistripping Additive

2.1.5 Tack Coat

2.2 COMPOSITION AND PROPORTIONS

2.2.1 Job Mix Formula

2.2.2 State-Approved Job Mix Formula

2.3 PRODUCTION

2.3.1 Mixing Plants

2.3.2 Materials During Production

2.3.2.1 Asphalt Cement

2.3.2.2 Water Content

2.3.2.3 Temperature

2.3.2.4 Storage of Mixture

PART 3 EXECUTION

3.1 CONVEYING AND PLACEMENT EQUIPMENT

3.1.1 Hauling Equipment

3.1.2 Pavers

3.1.3 Rollers

32 12 16.00 28

G4EDDRJR

Line

3.2 PLACING

3.2.1 General

3.2.1.1 Asphalt Concrete Mixture

3.2.1.2 Internal Temperature

3.2.2 Joints

3.2.2.1 General

3.2.2.2 Transverse Joints

3.2.3 Tack Coat

3.3 COMPACTION

3.3.1 Uniform Compaction

3.3.2 Compaction

3.3.3 Rolling

3.3.4 Prevention of Adhesion to the Rollers

3.3.5 Compaction of Asphalt Concrete

3.4 WEATHER LIMITATIONS

3.4.1 Wet or Damp Surfaces

3.5 PROTECTION

3.6 CONTRACTOR QUALITY CONTROL

3.6.1 Construction Testing Firm

3.6.1.1 Daily Testing Reports

3.6.1.2 Weekly Summaries and Final Asphalt Materials Testing Report

3.6.1.2.1 Weekly Summaries Reports

3.6.1.2.2 Final Asphalt Materials Testing Report

3.6.1.2.3 Sealing of Reports

3.6.2 Asphalt Concrete Density Testing

3.6.3 Surface Smoothness

3.6.4 Asphalt Temperature

3.6.5 Additional Tests

3.6.5.1 Asphalt Cement Content and Gradation

3.6.5.2 Maximum Theoretical Density

3.6.5.3 Materials for Testing

3.6.6 Acceptance Criteria

-- End of Section Table of Contents --

32 12 16.00 28

SECTION 32 12 16.00 28

ASPHALT CONCRETE OVERLAY

PART 1 GENERAL

1.1 SCOPE OF WORK

The work covered by this SECTION shall consist of constructing an asphalt concrete overlay on existing asphalt concrete pavements after all necessary patching and crack sealing are completed for the Lower Granite Project, Lewiston/Clarkston Bike Paths indicated, including the Swallows Park Lot 4 and 5 and Greenbelt Boat Ramp, Lot 1. The Contractor shall provide all necessary equipment, materials, and personnel to supply, place, and compact an asphalt concrete surface in accordance with these specifications and conforming to the lines, grades, thicknesses, and typical cross sections shown on the contract drawings.

1.2 REFERENCES

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

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO M 320 (2003) Performance-Graded Asphalt Binder

ASTM INTERNATIONAL (ASTM)

ASTM C 117 (2004) Materials Finer than 75 Micrometer (No. 200) Sieve in Mineral Aggregates by Washing

ASTM C 131 (1996) Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 136 (2006) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM D 4643 (2000) Determination of Water (Moisture) Content of Soil by the Microwave Oven Method

ASTM D 4959 (2000) Determination of Water (Moisture) Content of Soil by Direct Heating

ASTM D 242 (1995) Mineral Filler for Bituminous Paving Mixtures

ASTM D 979 (2001; R 2006e1) Sampling Bituminous Paving Mixtures

ASTM D 2172 (2005) Quantitative Extraction of Bitumen

32 12 16.00 28

G4EDDRJR

Line

G4EDDRJR

Line from Bituminous Paving Mixtures

ASTM D 2397 (1998) Cationic Emulsified Asphalt

ASTM D 2419 (1995) Sand Equivalent Value of Soils and Fine Aggregate

ASTM E 329 (2008) Standard Specification for Agencies Engaged in the Testing and/or Inspection of Materials Used in Construction

IDAHO STATE DEPARTMENT OF TRANSPORTATION

ITD-04 (2004) Standard Specifications for Highway Construction

WASHINGTON STATE DEPARTMENT OF TRANSPORTATION (WSDOT)

WSDOT M 41-10 (2008) Standard Specifications for Road, Bridge, and Municipal Construction

1.3 TOLERANCES

1.3.1 Asphalt Cement Content

The asphalt-cement content shall not vary more than plus-or-minus 0.2 percent of the quantity required.

1.3.2 Weights of Aggregates

Batch weights of aggregates shall be computed and recorded to the nearest 10 pounds.

1.3.3 Asphalt Concrete Surface Parallel to the Roadway

Unless otherwise designed, the asphalt concrete surface parallel to the roadway centerline or to the direction of placement shall not vary more than 1/8 inch from the lower edge of a 10-foot straightedge.

1.3.4 Asphalt Concrete Surface Perpendicular to the Roadway

Unless otherwise designed, the asphalt concrete surface perpendicular to the roadway centerline or to the direction of placement shall not vary more than 1/8 inch from the lower edge of a 10-foot straightedge.

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

SD-01 Preconstruction Submittals

Aggregate Source; G GT

Job Mix Formula; G GT

32 12 16.00 28

Nuclear Gauge

SD-03 Product Data

SD-06 Test Reports All unsatisfactory test results and any observations, measurements, analysis, discrepancies, or other issues that are not per Plans and Specifications shall be immediately reported to the COR. Construction testing shall be included in the weekly summary reports as available, and in the Final Asphalt Materials Testing Report.

Additional Tests; G GT C

Weekly Summaries Reports; G GT C

SD-11 Closeout Submittals

Final Asphalt Materials Testing Report; G GT C Submit within five (5) days of asphalt completion at work areas.

1.5 CONTRACTOR QUALITY CONTROL

Unless otherwise stated in THIS SPECIFICATION, all test results for Contractor Quality Control performed prior to placement of asphalt concrete shall be reported and delivered to a designated representative of the Contracting Officer prior to beginning placement of the asphalt concrete.

1.5.1 Aggregate Source Approval

The Contractor shall submit all data and test reports for the aggregate source. The test reports shall have been completed within the last two (2) years and show compliance to the specifications for durability, sand equivalent and wood waste. With the test reports, the Contractor shall confirm and submit in writing the proposed source located by Section, Township and Range, pit name, owner, operator using the pit, phone number for the operator, and if the source is approved by the State's Department of Transportation, the State's identification number.

1.5.2 Nuclear Gauge Submittal

To determine the in-place density of the asphalt concrete for quality control purposes, not acceptance, the Contractor may use a nuclear gauge.

The Contractor shall submit a copy of the State license authorizing the use of a nuclear gauge and manufacturer certification that operators have completed an approved safety and gage operation training session. For each gauge to be used on site, the date of last calibration, the individual or organization performing calibration, list of calibration standards, and the calibration curve shall be submitted.

1.5.3 Job Mix Formula

The Contractor shall submit the state-approved job mix formula as specified in paragraph below. In addition, the Contractor shall submit a manufacturer's statement certifying compliance to the specifications for:

(1) Asphalt cement.

(2) Cationic emulsified asphalt, CSS-1.

(3) Antistripping additive when required.

32 12 16.00 28

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Aggregates

2.1.1.1 General

Aggregate shall consist of crushed or partially crushed granular rock manufactured from ledge rock, talus or gravels.

2.1.1.2 Durability

Percentage of loss shall not exceed 40 after 500 revolutions, as determined in accordance with ASTM C 131.

2.1.1.3 Fracture Requirements

Crushed gravel retained on the No. 4 sieve and each coarser sieve shall contain at least 75 percent by weight of crushed pieces having one or more fractured faces with the area of each face equal to at least 75 percent of the smallest midsectional area of piece. When two fractures are contiguous, the angle between planes of fractures shall be at least 30 degrees to count as two fractured faces.

2.1.1.4 Sand Equivalent

Sand equivalent shall conform to the requirements of ASTM D 2419 and shall be a minimum of 45 percent. Testing for sand equivalent will not be required when the percentage of material passing the No. 200 sieve is less than 5 percent after crushing and screening.

2.1.1.5 Wood Waste

Wood waste shall not exceed 0.10 percent by weight of oven-dried, processed material retained on a 1/4-inch sieve.

2.1.1.6 Gradation

Gradation testing shall conform to the requirements of ASTM C 117 and ASTM C 136. The values given in the specification bands are acceptable percentages by weight of material passing a given sieve size.

GRADATION REQUIREMENTS

Sieve Size Gradation Limits

5/8" Sieve 100 1/2" Sieve 90-100 3/8" Sieve 75-90 1/4" Sieve 55-75 U.S. No. 10 Sieve 32-48 U.S. No. 40 Sieve 11-24 U.S. No. 80 Sieve 6-15 U.S. No. 200 Sieve 3.0-7.0 Mineral Filler 0-2

32 12 16.00 28

2.1.2 Mineral Filler

Mineral filler shall conform to the requirements of ASTM D 242.

2.1.3 Asphalt Cement

Asphalt cement shall meet the requirements of AASHTO M 320 and WSDOT M 41-10, Section 9-02.1(4,) or ITD-04, as applicable. The performance grade of asphalt cement used shall be as required by the Washington State Department of Transportation or the State of Idaho Transportation Department, as applicable.

2.1.4 Antistripping Additive

Antistripping additive shall be from a commercial supplier and specifically designated as an antistripping additive for asphalt cement.

2.1.5 Tack Coat

Tack coat shall be a cationic emulsified asphalt meeting the requirements of ASTM D 2397 for CSS-1. The tack coat may be a mixture of CSS-1 and water not to exceed a ratio of one to one (1:1).

2.2 COMPOSITION AND PROPORTIONS

2.2.1 Job Mix Formula

The job-mix formula shall be the responsibility of the Contractor and shall be submitted in writing to the Contracting Officer a minimum of 30 days prior to placement. Asphalt concrete placement for a specified mix shall not proceed until the job-mix formula is approved by the Contracting Officer. The submittal shall show all the calculations, proportions of materials by weight, manufacturer of asphalt cement and antistripping admixture, and the source of materials.

2.2.2 State-Approved Job Mix Formula

The Contractor shall submit a State-approved job mix formula for asphalt concrete meeting the requirements of WSDOT M 41-10, paragraph 5-04 or ITD-04, as applicable.

2.3 PRODUCTION

2.3.1 Mixing Plants

All mixing plants shall be capable of producing a uniform mixture and conform to the requirements listed in WSDOT M 41-10 or ITD-04, as applicable.

2.3.2 Materials During Production

2.3.2.1 Asphalt Cement

Asphalt cement furnished under these specifications shall not have been distilled at a temperature high enough to injure by burning or to produce flecks of carbonaceous matter, and upon arrival at the batch site, shall show no signs of separation into lighter and heavier components as determined by the Contracting Officer. At no time shall the temperature of the asphalt cement exceed 350-degrees F, nor shall the temperature exceed

300-degrees F at the time the asphalt cement is introduced to the aggregates.

2.3.2.2 Water Content

Water content of the aggregate shall be reduced by drying operations to less than 0.75 percent when tested tested in accordance to ASTM D 4959 or ASTM D 4643. For testing, the weight of the sample shall exceed 1.5 pounds.

2.3.2.3 Temperature

Temperature of the aggregates and mineral filler in the mixer shall not exceed 325-degrees F when the asphalt cement is introduced. After mixing, asphalt cement shall cover a minimum of 95 percent of the aggregate's surface area.

2.3.2.4 Storage of Mixture

In no case shall the mixture be stored more than four (4) hours after introduction of the asphalt cement to the aggregates.

PART 3 EXECUTION

3.1 CONVEYING AND PLACEMENT EQUIPMENT

3.1.1 Hauling Equipment

Trucks used for hauling plant mix shall have tight, clean, smooth metal beds. Each truck shall have a cover of canvas or other suitable material over the asphalt concrete when the air temperature is below 50-degrees F, or during periods of rain.

3.1.2 Pavers

Pavers shall be self-propelled units, provided with an activated heated screed. Only screed extensions which produce a satisfactory end result equal to the rest of the screed will be allowed. The paver shall be operated at a speed consistent with the delivery of plant mix which provides for a smooth, uniform forward travel with the least number of stops.

3.1.3 Rollers

Rollers shall be of the steel wheel, vibratory, or pneumatic-tired type, in good condition, capable of reversing without backlash, and shall be operated at speeds slow enough to avoid displacement of the mixture.

Rollers with steel-wheel drums shall be equipped with spray bars to distribute water. The number and weight of rollers shall be sufficient to compact the mixture as specified in paragraph 3.3.5 COMPACTION OF ASPHALT CONCRETE. The use of equipment which results in excessive crushing of the aggregate will not be permitted. Rollers producing pickup, washboard, uneven compaction of the surface, or other undesirable results shall be removed from the work area.

3.2 PLACING

3.2.1 General

The asphalt concrete overlay shall be 1.5 inches in thickness.

3.2.1.1 Asphalt Concrete Mixture

The asphalt concrete mixture shall be placed on an approved surface, spread and struck off to the grade and elevation shown in the contract drawings.

Unless otherwise directed by the Contracting Officer or specified elsewhere in the contract documents, the compacted depth of any one course shall not exceed three (3) inches.

3.2.1.2 Internal Temperature

The internal temperature of the mixture shall not drop more than 20-degrees F between the hot plant and the paver and shall not be less than 185-degrees F upon achieving density requirements in accordance with paragraph 3.3.5 COMPACTION OF ASPHALT CONCRETE.

3.2.2 Joints

3.2.2.1 General

Joints between old and new pavements, between successive days' work, or joints that have become cold (less than 175-degrees F) shall be made to ensure continuous bond between the old and new sections of the course. All joints shall have the same texture, smoothness, grade, and density as required for other sections of the course. Contact surfaces shall be cleaned by brushing or shall be cut back, as directed. The surface against which new material is placed shall be sprayed with a thin, uniform tack coat. Material shall be applied far enough in advance of placement of a fresh mixture to ensure adequate curing. Care shall be taken to prevent damage or contamination of the sprayed surface. Public traffic shall not be permitted on the prepared surface after the tack coat application.

Placement of the pavement mix shall be completed within four (4) hours after application of the tack coat.

3.2.2.2 Transverse Joints

The roller shall pass over the unprotected end of a strip of freshly placed material only when placing is discontinued or delivery of the mixture is interrupted to the extent that the material in place may become cold. In all cases, prior to continuing placement, the edge of previously placed pavement shall be cut back to expose an even vertical surface for full thickness of the course.

3.2.3 Tack Coat

A tack coat shall be applied in a manner that provides full coverage of the applied surface. A minimum applied rate of 0.04 gallons per square yard of retained asphalt shall be applied. The Contracting Officer will direct the application of additional tack coat if full coverage is not observed. All costs associated with tack coating shall be incidental to the cost of asphalt concrete paving.

3.3 COMPACTION

3.3.1 Uniform Compaction

Immediately after the asphalt concrete mixture has been spread, struck off, and surface irregularities adjusted, it shall be thoroughly and uniformly compacted. The completed course shall be free from ridges, ruts, humps, depressions, objectionable marks, or irregularities and in conformance with line, grade, and cross section as shown in the contract drawings or as specified.

3.3.2 Compaction

Compaction shall take place when the mixture is in the proper condition so that no undue displacement, cracking or shoving occurs. All compaction units shall be operated at the speed, within specification limits, that will produce the required compaction. Areas inaccessible to large compaction equipment shall be compacted by mechanical or vibratory hand compactors. Any asphalt concrete that becomes loose, broken, contaminated, shows an excess or deficiency of asphalt, or is in any way defective, shall be removed and replaced at no additional cost to the Government with fresh hot mix which shall be immediately compacted to conform with the surrounding area.

3.3.3 Rolling

Unless otherwise directed by the Contracting Officer, rolling shall begin at the edge of the pavement and proceed longitudinally with the direction of laydown, working to the highest point of the pavement template with each pass overlapping one-half the roller width of the previous pass. When paving in echelon or abutting a previously placed lane, the longitudinal joint should be rolled first followed by the regular rolling procedure.

3.3.4 Prevention of Adhesion to the Rollers

To prevent adhesion of the mixture to the rollers, the wheels shall be kept properly moistened with water or water mixed with very small quantities of detergent or other approved materials. Excessive moisture shall not be left on the asphalt concrete.

3.3.5 Compaction of Asphalt Concrete

The asphalt concrete pavement shall be compacted to a density of 91.0 percent of the theoretical maximum density as determined by the Superpave Mix Design Method.

3.4 WEATHER LIMITATIONS

3.4.1 Wet or Damp Surfaces

Asphalt concrete shall not be applied to wet or damp surfaces or before any imminent storms that might damage the final results. The Contracting Officer will have the discretion as to whether the conditions are unsuitable to proceed with construction.

(1) The average surface temperature of the media to be overlayed shall be a minimum of 45-degrees F.

(2) The air temperature shall be a minimum of 50-degrees F and be expected to be maintained or rise as work proceeds.

3.5 PROTECTION

Should irregularities or contamination develop in the asphalt concrete, or in materials supporting the asphalt concrete, during or after placement until the work is accepted, the Contractor shall correct the defects to meet the requirements of this specification. Any additional materials, labor, or equipment necessary to make the repairs shall be furnished by the Contractor at no expense to the Government.

3.6 CONTRACTOR QUALITY CONTROL

3.6.1 Construction Testing Firm

The Construction Testing Firm (Testing Firm) used for quality control testing shall be a recognized testing firm with a laboratory meeting the requirements of ASTM E 329 to test the asphalt concrete. the Contractor shall immediately notify the COR of all unsatisfactory test results, measurements, observations, or conditions that are not in accordance with the Plans and Specifications.

3.6.1.1 Daily Testing Reports

The Testing Firm shall prepare a Daily Testing Report documaenting construction observations, field measurements, paver screed height, material sampling, density tests, laboratroy test results as available, and other pertinent information. Contractor shall attach the Daily Testing Reports to the Contractor's Daily Report.

3.6.1.2 Weekly Summaries and Final Asphalt Materials Testing Report

3.6.1.2.1 Weekly Summaries Reports

The Testing Firm shall prepare a summary report on a weekly basis. The summary reports shall include the Daily Reports documenting, construction observations, field measurements, paver screed height, material sampling, density tests, and laboratory test results as available. Discrepancies, exceptions and other issues not consistant with the plans and specifications shall be specifically addressed, including a description of the problem, as well as the planned approach for meeting the requirements of the Plans and Specifications.

3.6.1.2.2 Final Asphalt Materials Testing Report

The Testing Firm shall also prepare a Final Asphalt Materials Tesing Report including all the construction observations and test results, as well as confirmation that all descrepancies and construction issues were addressed.

3.6.1.2.3 Sealing of Reports

The Weekly Summary Reports and the Final Asphalt Materials Testing Report shall be sealed by a Licensed Professional Engineer indicating the asphalt concrete and related construction were constructed in accordance with the Plans and Specifications.

3.6.2 Asphalt Concrete Density Testing

The density of comapcted asphalt concrete pavements shall be routinely tested by the construction Testing Firm using a nuclear densometer after completion of finish rolling. Density tests shall be completed along bike path segemets at a maximum of 250 foot intervals. In parking lot areas, density test coverage shall be consistent with a minimum of one test per 5,000 square feet of pavement, each parking lot shall have a minimum of one test unless it's size requires more.

32 12 16.00 28

3.6.3 Surface Smoothness

The Contractor shall check surface smoothness for compliance to the specifications and make available for use by the Contracting Officer a manufactured 10-foot straight edge. Surface smoothness shall be checked in the transverse and longitudinal directions at intervals not more than 100 feet. Results of measurements to check surface smoothness shall be included in Daily Reports by the construction Testing Firm.

3.6.4 Asphalt Temperature

A probe thermometer shall be used to determine the internal temperature of the asphalt concrete. A minimum of one (1) temperature reading shall be recorded for each required density check. Both ambient air temperature and asphalt temperatures shall be included in Daily Reports by the construction Testing Firm.

3.6.5 Additional Tests

3.6.5.1 Asphalt Cement Content and Gradation

The asphalt concrete shall be sampled in the field during placement.

Testing for asphalt content and aggregate gradation shall be completed on a daily basis. Results shall be available within 24 hours of sampling.

3.6.5.2 Maximum Theoretical Density

Testing to determeine the theoretical density shall be completed on the first day of asphalt concrete placement, and again for each subsequent 500 tons of asphalt placed at the site. Test results shall include a statement by the construction Testing Firm confirming whether the test results are consistent with the Job Mix Formula and the Specifications.

3.6.5.3 Materials for Testing

The sample of materials for testing shall be taken from the test area prior to compaction and in accordance with ASTM D 979. The asphalt concrete mix shall be tested in accordance with ASTM D 2172 to determine the asphalt cement content and in accordance with ASTM C 136 to determine the aggregate gradation.

3.6.6 Acceptance Criteria

The Final Asphalt Materials Testing Report may be accepted by the COR if all work meets the specifications.

-- End of Section --

32 12 16.00 28

G4EDDRJR

Line

G4EDDRJR

Line