36C78619Q0214-003.pdf

Project Number 919-NRM19-006

FY19 Roadway & Parking Lot Improvements at the

Tahoma National Cemetery

Technical Specifications

TECHNICAL SPECIFICATION

TABLE OF CONTENTS

Feb. 20, 2019

SECTIONS:

32 12 17 Asphalt Paving for Parking Lot 32 12 36 Asphalt Slurry Seal Coat - ISSA

02-20-19

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SECTION 32 12 17

ASPHALT PAVING FOR PARKING LOT

PART 1 - GENERAL

1.1 DESCRIPTION

A. The “Parking Lot Expansion Project” shall run along the west edge of the existing paved drive / parking lot (approximately 150 feet) and extend twenty-five (25) feet further west into the existing woods. The new asphalt parking area will be approximately 4000 square feet to allow a minimum twenty (20) foot length parking spaces.

B. The Contractor shall furnish all tools, labor, materials, equipment, services, and related services to perform work described within the contract, statement of work, technical specification, and on Drawings.

Work will include all tree removal, clearing, grubbing, unclassified excavation, subgrade, surfacing, grading, paving, striping, and other incidentals for a complete parking lot.

C. Contractor shall read and comply with all conditions of this Contract including the Technical Specification and Referenced Standards as it relates to all requirements, products & materials, submittals, testing, and execution.

D. Contractor shall pay for private locator to locate all underground utilities within the project areas. There shall be no excavation until all utilities have been located and marked in the field.

E. Contractor shall conform to all Local, State, and Federal Requirements as it relates to “Water Pollution Control”. If measures are required by the

Contractor to prevent, control, or abate Water Pollution; such measures will be at a minimum in conformance with the requirements outlined by the jurisdiction at the Contractor’s own expense.

F. The Contractor shall ensure effective and continuous soil erosion and sediment control throughout the construction period.

1.2 RELATED WORK

A. See Statement of Work: “FY19 Roadway & Parking Lot Improvements” dated

February 20, 2019.

B. See Drawings: “FY19 Roadway & Parking Lot Improvements” dated February

20, 2019.

1.3 DEFINITIONS

A. Unclassified Excavation: Unclassified excavation shall consist of the excavation and disposal of all materials, of any description, encountered during construction, unless otherwise specified in the contract.

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B. Subgrade Surface: The subgrade surface is the surface of the road section upon which the select materials and/or subbase are placed.

C. Suitable Material: A material whose composition is satisfactory for use in embankment construction is a suitable material. The moisture content of the material has no bearing upon such designation. In general, any mineral (inorganic) soil, blasted or broken rock and similar materials of natural or man-made (i.e. recycled) origin, including mixtures thereof, are considered suitable materials.

D. Unsuitable Material: Any material containing vegetable or organic matter, such as muck, peat, organic silt, topsoil or sod, or other material that is not satisfactory for use as a Subgrade material is designated as an unsuitable material. All man-made deposits of industrial waste, toxic or contaminated materials, sludge, landfill or other material is unsuitable.

All excavated unsuitable materials shall be the Contractor's property for disposal as surplus materials.

E. Proof Rolling: Proof rolling consists of applying test loads over the subgrade surface by means of a heavy pneumatic-tired roller of specified design, to locate and permit timely correction of deficiencies likely to adversely affect performance of the pavement structure.

1.4 ALIGNMENT AND GRADE CONTROL

A. The Contractor’s Registered Professional Land Surveyor shall establish and control the pavement (aggregate or asphalt base course and asphalt surface course) alignments, grades, elevations, and cross sections required to conduct the work.

1.5 SUBMITTALS

A. Data and Test Reports:

1. Aggregate Base Course: Sources, gradation, liquid limit, plasticity index, percentage of wear, and other tests required by State Highway

Department.

2. Asphalt Base/Surface Course: Aggregate source, gradation, soundness loss, percentage of wear, and other tests required by State Highway

Department.

3. Hot Mixed Asphalt Job-mix formula.

B. Certifications:

1. Asphalt prime and tack coat material certificate of conformance to

State Highway Department requirements.

2. Asphalt cement certificate of conformance to State Highway Department requirements.

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3. Job-mix certification - Submit plant mix certification that mix equals or exceeds the State Highway Specification.

C. Contractor shall submit to the COR the qualifications and certifications of such Testing Company within ten (10) days of the Notice to Proceed.

Once the Testing Company is approved by the COR, the Contractor shall submit to the COR a detailed Testing Schedule ten (10) days in advance of any work.

D. Once the Parking Lot Expansion area has been paved the contractor shall prepare and submit to the project manager a “Striping Plan” showing the limits of the parking lot area and proposed striping of parking stalls with a minimum dimension of ten (10) feet in width and twenty (20) feet in length drawn perpendicular to the adjacent drive. The Contractor shall make revisions as outlined by the Project Manager and resubmit the

“Striping Plan” prior to painting parking stripes in the field.

1.6 CONTROL OF WORK AND MATERIALS

A. The Contracting Officer Representative (COR) shall have access to all parts of the material producing plants for checking the mixing operations and materials and the adequacy of the equipment. The COR will make all decisions for the NCA regarding the acceptability of materials furnished, work performed, and work progress.

B. Construction operations requiring soil compaction shall not be performed from November 1st thru April 1st except with approval from the Project

Manager.

C. The Contractor is responsible for the proper coordination of all contractors, utilities, and subcontractors engaged in the work within and adjacent to the contract site.

D. All work which does not conform to the requirements of the contract and technical specifications shall be considered unacceptable. The COR may direct the Contractor to remove any portion of the work performed under this contract for inspection or for any other purpose.

E. All work shall be in satisfactory condition at the time of contract acceptance. Any work done or materials used without inspection by an authorized Contracting Officer Representative may be ordered removed and replaced at the Contractor's expense.

F. Unacceptable work, whether caused by poor work, defective materials, damage through carelessness or any other cause found to exist prior to the final acceptance of the work, shall be removed immediately and replaced in an acceptable manner to the COR.

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G. Materials shall come from (WSDOT) approved sources and comply with

Division 9 – “Materials” of the (WSDOT) “Standard Specifications”.

H. All Materials shall be inspected, sampled, and tested by a state certified testing company paid for by the Contractor.

I. Whenever any specification provides for Manufacturer’s Certification, Material Certification or Approved List as a Basis of Acceptance, the NCA reserves the right to sample and / or test material in any shipment prior to incorporation in the work.

J. Any material which is rejected because of failure to meet the required tests or that has been damaged to cause rejection, shall be immediately removed from the site of the work by the Contractor at no additional cost to the NCA.

K. The Contractor shall protect and preserve all government property, including all existing vegetation, existing landscape features, and monuments within, along, and adjacent to the Project area.

L. All areas disturbed by the Contractor shall be restored to an immaculate and COR acceptable condition, particularly those areas within sight of the visitors and public. Where deemed necessary by the COR, the Contractor shall submit a grading plan to include the sequence of operations, erosion and sediment controls, final slopes and surface restoration details.

M. All damage, direct or indirect, of whatever nature resulting from the performance of the work or resulting to the work during its progress from whatever cause, including omissions and supervisory acts of the NCA, shall be borne and sustained by the Contractor, and all work shall be solely at its risk until it has been finally inspected and accepted by the COR.

N. The Contractor shall manage all surplus materials and waste generated in the performance of the contract in accordance with applicable federal, state, and local laws and regulations. Nothing herein is intended to prevent the Contractor from removing surplus materials or waste to appropriate off-site locations for beneficial reuse, recovery, or recycling purposes.

1.7 APPLICABLE PUBLICATIONS

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

B. American Association of State Highway and Transportation Officials

(AASHTO):

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HMWB....................Standard Specifications for Transportation

Materials and Methods of Sampling and Testing, 2017 Edition

HMAPG-1.................Designing HMA Mixtures with High RAP Content: A

Practical Guide

M147-17 ................Standard Specification for Materials for

Aggregate and Soil-Aggregate Subbase, Base, and

Surface Courses, 2017 Edition

M320-17.................Standard Specification for Performance-Graded

Asphalt Binder

PDCM-1..................Pavement Design, Construction, and Management:

A Digital Handbook, 1st Edition

R050-09.................Standard Practice for Geosynthetic

Reinforcement of the Aggregate Base Course of

Flexible Pavement Structures, 2009 Edition

T019MT019-14............Standard Method of Test for Bulk Density ("Unit

Weight") and Voids in Aggregate, 2014 Edition

T027-14.................Standard Method of Test for Sieve Analysis of

Fine and Coarse Aggregates, 2014 Edition

C. American Society for Testing and Materials (ASTM):

C29-17..................Standard Test Method for Bulk Density ("Unit

Weight") and Voids in Aggregate

C977-10.................Standard Specification for Quicklime and

Hydrated Lime for Soil Stabilization

D8-17...................Terminology Relating to Materials for Roads and

Pavements

D140-16.................Practice for Sampling Bituminous Materials

D946-15.................Specification for Penetration-Graded Asphalt

Cement for Use in Pavement Construction

D3786-18................Standard Test Method for Bursting Strength of

Textile Fabrics—Diaphragm Bursting Strength

Tester Method

D4355-14................Standard Test Method for Deterioration of

Geotextiles by Exposure to Light, Moisture and

Heat in a Xenon Arc Type Apparatus

D4632-15................Standard Test Method for Grab Breaking Load and

Elongation of Geotextiles

D6373-16................Standard Specification for Performance Graded

Asphalt Binder

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D6390-17................Standard Test Method for Determination of Drain down Characteristics in Un-compacted Asphalt

Mixtures

D. National Asphalt Paving Association (NAPA):

TB1-16..................Hot Mix Asphalt Materials, Mixture Design and

Construction

TAS-15..................Rolling & Compaction of HMA Pavements

QIP-128E-13.............Best Practices for Emulsion Tack Coats

PART 2 - PRODUCTS

2.1 GENERAL

A. All material shall conform to Washington State Department of

Transportation (WSDOT) Standard Specifications – Division 5-04 - “Hot

Mixed Asphalt” & Division 9 – “Materials”. Contractor shall make submittals of all materials prior to the installation. Materials shall come from (WSDOT) approved sources.

2.2 SUBGRADE & SELECT MATERIALS

A. Material for Select Borrow shall consist of granular material, either naturally occurring or processed, and shall meet the requirements of

Section 9-03.14(2) “Select Borrow” of the (WSDOT) “Standard

Specifications”.

B. The Contractor shall ensure that all processing operations including washing, removal of oversize material, blending, or crushing shall be completed at the source of the material.

2.3 BASES AND SUBBASES

A. Bituminous Stabilized Course shall conform to Section 302 Bituminous

Stabilized Course of the NYDOT “Standard Specifications”. The Contractor shall furnish, place, and compact a course of bituminous stabilized granular material and stabilized reclaimed asphalt pavement shoulder in conformance with this Specification, the payment lines, and typical sections shown on the plans or as specified by the COR.

B. Subbase Course shall conform to Section 304 Subbase Course of the NYDOT

“Standard Specifications”. The Contractor shall furnish, place, and compact a subbase course of the specified type in conformity with the lines, grades, thicknesses and typical sections shown on the Drawings or as specified by the COR.

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2.4 CONSTRUCTION GEOSYNTHETIC

A. Materials shall meet the requirements of the Section 9-33 “Construction Geosynthetic” of the (WSDOT) “Standard Specifications”.

B. Geosynthetic roll identification, storage, and handling shall be in conformance to ASTM D4873.

2.5 SUBBASE AGGREGATES

A. Aggregate for Gravel Base shall be in conformance with Section 9-03.10 of the (WSDOT) “Standard Specifications”.

B. Provide aggregates consisting of crushed stone, gravel, sand, or other durable mineral materials processed and blended, and naturally combined.

C. Subbase aggregate shall have maximum size 1-1/2 inches and have no more than 5% passing the No. 200 sieve.

D. Gravel base material retained on a No. 4 sieve shall contain NO wood waste or other non-mineral material. Submit gradation test to Project Manager.

2.6 ASPHALT AGGREGATES

A. Aggregate for Hot Mixed Asphalt shall be in conformance with Section 9-

03.8 – “Aggregates for Hot Mix Asphalt” of the (WSDOT) “Standard

Specifications”.

B. Aggregates for Hot Mixed Asphalt Base shall be HMA class 1-inch in conformance with Section 9-03.8(2) “HMA Test Requirements” and Section 9-

03.8(6) “HMA Proportions of Materials” of the (WSDOT) “Standard

Specifications”.

C. Aggregates for Hot Mixed Asphalt wearing surface shall be HMA class 3/8-inch in conformance with Section 9-03.8(2) “HMA Test Requirements” and

Section 9-03.8(6) “HMA Proportions of Materials” of the (WSDOT) “Standard

Specifications”.

2.7 ASPHALTS

A. Produce Hot Mixed Asphalt (HMA) in accordance with the requirements outlined in Section 5-04 “Hot Mix Asphalt” and Section 9-02 “Bituminous

Materials” of the (WSDOT) “Standard Specification”, including all applicable Test Methods and Materials.

B. HMA mixture designs must be submitted and accepted by the Project Manager prior to delivery to the Project site.

C. The Asphalt Supplier of Performance Graded (PG) asphalt binder (PGAB) and emulsified asphalt shall have a Quality Control Plan (QCP) in accordance with WSDOT QC 2 “Standard Practice for Asphalt Suppliers That Certify

Performance Graded and Emulsified Asphalts”.

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D. The Asphalt Supplier of Penetration Grade Asphalt Binder (PGAB) and emulsified asphalt shall certify through the PGAB or emulsified asphalt meets the Specification requirements of the Contract.

E. Penetration Grade (PG) shall be appropriate for the location and region within the state of Washington. Penetration Grade shall not be lower than

PG 58 or more than PG 64 for High Temperature and lower than PG-22 or more than PG-28 for Low Temperature in the State of Washington.

2.8 PAVEMENT MARKING

A. Material for pavement marking shall be paint or plastic as noted in the

Bid item meeting the requirements of Section 9-34 “Pavement Markings” of the (WSDOT) “Standard Specifications”.

B. Submit Product Technical Data and MSDS Sheets to Project Manager prior to placement on the newly paved surface.

PART 3 - EXECUTION

3.1 GENERAL

A. Contractor shall provide and install control markers and stakes for parking lot expansion area to establish tree removal, clearing, grubbing, unclassified excavation, subgrade, surfacing, grading, and controlling paving operations. No field disturbance shall take place until control markers and stakes have been placed in the field and have been inspected and approved by the COR.

B. Upon clearing of the parking lot expansion area, the Contractor shall provide topographic survey plan showing existing and proposed grading.

The plan shall be submitted to the project manager for review and approval. Proposed grading will ensure that a slope of the finished asphalt wearing surface slopes away from the existing drive / parking lot and into the woods at 1.5 % to 4% grade via sheet flow.

C. The proposed profile of the parking lot expansion area shall consist of properly prepared and compacted subgrade where a non-woven geosynthetic will be placed, followed by a minimum of eight (8) inches of properly compacted gravel base course material in conformance with (WSDOT) Division

9 – “Materials”.

D. The Hot Mix Asphalt pavement shall consist of an asphalt base course and asphalt surface course constructed in conformity with the lines, grades, and thickness described in the Contract documents. Each course shall be constructed to the depth, section, or elevation required by the Contractor submitted and Project Manager approved Grading Plan and shall be rolled, compacted, finished, and approved before the placement of the next course.

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E. The Contractor shall produce the Hot Mixed Asphalt HMA according to the specifications herein and provide production documentation and HMA Design to the COR as part of the Submittal Requirements.

F. A total of four (4) inches of Hot Mixed Asphalt (HMA) will be placed on the compacted base material. Prior to placement of any HMA material a

Tack Coat shall be applied and cured. The HMA will be placed in two (2) separate lifts separated by a Tack Coat application.

G. The HMA Asphaltic Binder shall be (2.5 – inches) compacted thickness followed by a (1.5 – inch) compacted HMA Wearing Surface in conformance with section 5-04 “Hot Mixed Asphalt” of the (WSDOT) Standard

Specifications.

H. Schedule paving operations such that all Hot Mixed Asphalt placements are completed within the temperature and seasonal limitations, provide safe and adequate work zone traffic control, and protect previously laid courses at all time.

I. Once the Parking Lot Expansion area has been paved the contractor shall prepare and submit to the project manager a “Striping Plan” showing the limits of the parking lot area and proposed striping of parking stalls with a minimum dimension of ten (10) feet in width and twenty (20) feet in length drawn perpendicular to the adjacent drive.

J. The Contractor shall make revisions as provided by the Project Manager and resubmit the “Striping Plan” prior to painting parking stripes.

K. Contractor shall keep the project work site clean and tighty at all time.

At the end of each work day, all material and equipment shall be stored in a designated place per the Cemetery Director or COR.

L. The Contractor shall manage all surplus materials and waste generated in the performance of the contract. Dispose waste materials off site in accordance with applicable federal, state, and local laws and regulations.

3.2 TREE REMOVAL, CLEARING, GRUBBING, & ROCK REMOVAL

A. Clear all trees & shrubs within the clearing limits approved by the COR.

B. Log all trees and remove from the site unless arrangements can be made with the Cemetery Director and COR to store on site.

C. Only hand clearing of trees and brush will be allowed within fifty (50) feet of any “wetland”.

D. Trim all tree branched up to twelve feet of the finished grade that protrude into the proposed Parking Lot footprint.

E. No Grubbing will be conducted until all “Soil & Erosion Control Best

Management Practices” have been approved and in place.

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F. Grub deep enough to remove all stumps, large roots, standard backhoe bucket size boulders, and other material to establish a minimum of twelve inches of properly prepared and compacted Subbase material.

G. When the Contractor finds rocks or “bucket size” boulders other hard material at the Subgrade elevation, it shall be excavated to at least twelve (12) inches below Subgrade, then backfilled with gravel, or other free-draining aggregate material not more than 3 inches in diameter or less than 1 inch in diameter.

3.3 GRADING PLAN & GRADING

A. Upon clearing of the parking lot expansion area, the Contractor shall provide topographic survey plan showing existing and proposed grading.

The plan shall be submitted to the project manager for review and approval. Proposed grading will ensure that a slope of the finished asphalt wearing surface slopes away from the existing drive / parking lot and into the woods at 1.5 % to 4% grade via sheet flow.

B. Contractor shall provide for off-site disposal of all soils not to be reused as backfill or topsoil.

C. If moisture content of existing soils is above optimum moisture content, the Contractor shall remove and dispose of these soils and import

“suitable material” at no additional cost to the NCA.

D. Grade parking lot and all disturbed area as shown on the Project Manager approved “Grading Plan” furnished and paid for by the Contractor.

3.4 SUBGRADE

A. Shape the entire Subgrade to a uniform surface running reasonably true to the line, grade, and cross-section as staked. Drain water from all low spots or ruts. Before any subbase or base course is placed, the Contractor shall bring the Subgrade to the required line, grade, and cross-section.

B. All depressions that develop under rolling shall be filled with acceptable material and the area re-rolled.

C. Soft areas shall be removed and filled with acceptable materials and the area re-rolled.

D. Should the subgrade become rutted or displaced prior to the placing of the subbase, it shall be reworked to bring to line and grade.

E. Proof-roll the subgrade with maximum 45 ton (50 ton) gross weight dump truck as directed by the COR. If pumping, pushing, or other movement is observed, rework the area to provide a stable and compacted subgrade.

F. The Contractor shall compact the Subgrade to a depth of 12 inches to 95 percent of maximum density as determined by the compaction control tests for granular materials.

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3.5 SUBBASE AND BASE COURSES

A. Subbase (when required)

1. Spread and compact to the thickness shown on the drawings.

2. Rolling shall begin at the sides and continue toward the center and shall continue until there is no movement ahead of the roller.

3. After completion of the subbase rolling there shall be no hauling over the subbase other than the delivery of material for the top course.

B. Base

1. Spread and compact to the thickness shown on the drawings. The maximum compacted layer thickness is 6 in. when not shown on the Drawings. The minimum loose lift thickness is 1.5 times the maximum particle size.

2. Rolling shall begin at the sides and continue toward the center and shall continue until there is no movement ahead of the roller.

3. After completion of the base rolling there shall be no hauling over the base other than the delivery of material for the top course.

C. Thickness tolerance: Provide the compacted thicknesses shown on the approved Drawings within a tolerance of 0.5 inches.

D. Smoothness tolerance: Provide the lines and grades shown on the Drawings within a tolerance of 3/16 inch in ten feet.

E. Moisture content: Use only the amount of moisture needed to achieve the specified compaction. When the moisture content is within the limits for proper compaction, compact the material in accordance with the requirements of Section 2-03.3(14) D – “Compaction and Moisture Control

Tests” of the (WSDOT) “Standard Specifications”.

3.6 CONTRUCTION GEOSYNTHETIC

A. The Contractor shall furnish and place Construction Geosynthetic over properly prepared subbase in accordance with the Statement of Work and

Section 2-12.3 “Construction Requirements” of the (WSDOT) “Standard

Specifications”.

B. The area to be covered by the Construction Geosynthetic shall be graded to a smooth, uniform condition free from ruts, potholes, and protruding objects such as rocks or sticks. The geosynthetic shall be spread immediately ahead of the covering operation.

C. The Construction Geosynthetic shall either be overlapped a minimum of 2 feet at all longitudinal and transverse joints, or the joints shall be sewn together. The initial lift thickness shall be 6 inches.

3.7 MIXING AND SELECTION OF HOT MIXED ASPHALTIC MATERIALS

A. Provide Hot Mixed Asphaltic materials conforming with:

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1. Temperature leaving the plant: 143 degrees C (290 degrees F) minimum, 160 degrees C (320 degrees F) maximum.

2. Temperature at time of placing: 138 degrees C (280 degrees F) minimum.

B. Supply Top Course HMA from a single plant for the entire project duration such that the pavement surface has a uniform color and texture as determined by the COR.

3.8 PLACEMENT OF ASPHALTIC CONCRETE PAVING

A. Remove all loose materials from the compacted base or subbase.

B. Apply the specified prime coat, and tack coat where required, and allow to dry in accordance with the manufacturer’s recommendations.

C. Provide pavers capable of spreading and finishing courses of HMA plant mix material in lane widths, shoulders, or similar construction applicable to the specified typical section and thicknesses shown on the plans.

D. Use HMA paver to place the mixture either over the entire width or over a partial width that may be practical. Place the mixture on a clean, tack coated surface.

E. Rollers can either be vibratory, oscillatory, static steel wheel type, or pneumatic tire rollers capable of compacting HMA.

F. The Contractor shall not accept material unless it is covered with a tarpaulin until unloaded, and unless the material has a temperature of not less than 130 degrees C (280 degrees F).

G. The Contractor shall not commence placement of asphaltic concrete materials when the atmospheric temperature is below 45 degrees F, not during fog, rain, or other unsuitable conditions.

H. Apply tack coat on the contact surfaces between all HMA pavement lifts.

Paving over a tack coat should not commence until the emulsion has broken

(goes from brown to black) or is tacky when touched.

I. Spread material in a manner that requires the least handling. Where thickness of finished paving will be 2-inches or less, spread in one layer.

J. After the material has been spread to the proper depth, roll until the surface is hard, smooth, unyielding, and true to the thickness and elevations shown own the drawings. Roll in at least two directions until no roller marks are visible.

K. Compact the HMA pavement sufficiently using the appropriate compaction method specified in the (WSDOT) “Standard Specifications”, to achieve pavement densities in a range of 93% to 97%, expressed as a percentage of the mixture’s maximum theoretical density.

L. Finished paving smoothness tolerance: No depressions which will retain standing water. No deviation greater than 1/8-inch in six feet.

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M. Construct all joints in conformance with the requirements outlined in

Section 5-04 “Hot Mix Asphalt” of the (WSDOT) “Standard Specifications”.

N. Protect the asphaltic concrete paved areas from traffic until the sealer is set and cured and does not pick up under foot or wheeled traffic.

3.9 PAVEMENT MARKINGS

A. Install all Parking Stall pavement markings in accordance with Section 8-

22 “Pavement Marking” of the (WSDOT) “Standard Specifications”.

3.10 RESTORATION

A. The Contractor shall protect and preserve all public and private property, including all existing vegetation, existing landscape features, and monuments within, along, and adjacent to the Limits of the Work.

B. All areas disturbed by the Contractor shall be restored to a pleasing and acceptable condition, particularly those areas within sight of the finished roadway or other paved areas. All such areas shall present a pleasing appearance to travelers on the Cemetery grounds.

C. Where outlined in these technical specifications or as deemed necessary by the COR, the Contractor shall submit a “Grading Plan”. Grading Plan shall include the sequence of operations, the erosion and sediment controls, final slopes and surface restoration details.

D. In general, the restoration of disturbed areas shall include:

1. The removal of all equipment and parts, junk, rubbish, excess materials and debris of all kind;

2. Clean up as required, grading as shown on a grading plan if required;

or graded to blend into the surrounding ground forms;

3. Scarification of yards, batch sites, haul roads, etc., to the depth necessary to support vegetation;

4. The removal of pavement or granular surfacing from, and regrading of, temporary roads or areas;

5. The repair / removal / replacement of damaged trees;

6. The fertilizing, seeding and mulching of disturbed areas;

E. The restoration of disturbed areas shall be accomplished prior to Contract

Final Acceptance and Final Payment.

- - - E N D - - -

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SECTION 32 12 36

ASPHALT SLURRY SEAL COAT - ISSA

PART 1 - GENERAL

1.1 DESCRIPTION

A. This Section specifies the requirements for placing an Asphalt Slurry

Seal Coat upon an existing asphalt pavement surface for maintenance purposes in areas as generally shown on the Drawings, marked in the Field by the COR, and outlined in the Statement of Work.

B. The Slurry Seal shall consist of a mixture of an approved emulsified asphalt, mineral aggregate, water, and specified additives, proportioned, mixed and uniformly spread over a properly prepared surface in areas shown on the Drawings, as directed by the Project Manager, or Project COR.

C. The Slurry Seal shall leave a homogeneous mat, adhere firmly to the prepared surface, and have a friction-resistant surface texture throughout its service life.

D. All materials, testing, execution, and related work shall be in conformance with the International Slurry Surfacing Association (ISSA) –

“Recommended Performance Guideline for Emulsified Asphalt Slurry Seal –

A105” (latest edition).

E. During construction the Contractor is responsible for site safety, traffic control, staging / stockpile area, surface preparation, application conditions / rate / type, quality issues, and post construction conditions and treatments.

F. The Contractor shall protect and preserve all government property, including all existing vegetation, existing landscape features, and monuments within, along, and adjacent to the Project area.

1.2 RELATED WORK

A. See Statement of Work: “FY19 Roadway & Parking Lot Improvements” dated

February 20, 2019.

B. See Drawings: “FY19 Roadway & Parking Lot Improvements” dated February

20, 2019.

1.3 DEFINITIONS

A. Refer to ASTM D8-18 “Terminology Relating to Materials for Roads and

Pavements” for definitions of terms.

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1.4 PROJECT / SITE CONDITIONS

A. Both surface and ambient temperature must be a minimum of 50°F and rising before applying crack fillers, oil spot primers, and slurry seal coat pavement treatment.

B. Apply Slurry Seal coat materials during dry conditions when rain is not imminent or forecast for at least 24 hours after application.

C. The expected high temperature must be at least 60 degrees F within 24 hours after placement of the Slurry Seal.

D. No Slurry Seal shall be applied when there is the possibility of freezing temperatures at the project location within 24 hours after application.

1.5 PRECONSTRUCTION MEETING

A. A minimum of 15 days before starting placement of slurry seal, the

Contractor shall submit:

1. Samples of the aggregate.

2. Samples of asphaltic emulsion or polymer modified asphaltic emulsion.

3. Asphaltic emulsion or polymer modified asphaltic emulsion data.

4. Contractor’s aggregate test results.

B. A minimum of 10 days before starting slurry seal activities, ensure the contractor submits the names of proposed authorized laboratories for quality control testing.

C. The Contractor shall schedule an on-site preconstruction meeting a minimum of 5 days before the start of the slurry seal. At the preconstruction meeting, the Contractor will discuss the quality control program and method for performing each element of work affecting material quality.

D. The following items should be discussed:

1. Frequency of quality control sampling and testing that meets or exceeds specification requirements listed Section 37-1.01D, “Quality

Assurance,” of the Standard Specifications.

2. Time and frequency of submitting test results.

3. Responsibilities of quality control laboratories.

1.6 SUBMITTALS

A. Before work begins, the contractor shall submit a signed “Mix Design” covering the specific materials to be used on the project. The “Mix

Design” shall conform to Section 5.2 “Mix Design” of the ISSA-A105

Guideline. This design will be performed by a laboratory which has experience in designing Emulsified Asphalt Slurry Seal Surfacing. After

32 12 36 - 3 the mix design has been approved, no material substitution will be permitted unless approved by the NCA Project Manager.

B. Contractor shall submit a copy of the AASHTO accreditation for the laboratory performing the testing of the Aggregate and Asphaltic Emulsion.

All lab testing results shall be emailed directly to the NCA Project

Manager and COR upon completion of the test.

C. Submit a certificate of compliance for each load of crack treatment material if it is on the (WSDOT)Authorized Material List. If the crack treatment material is not on the Authorized Material List, obtain samples and authorized laboratory test results 20 days before use.

D. Samples for Asphaltic Emulsion Slurry Seal will not need to be delivered to the NCA. Contractor shall furnish the Third-Party Testing Agency with these sample for required testing. Asphaltic Emulsion Test Results shall be forwarded to the Project Manager for review and approval prior to the placement of the material in the Slurry Seal Coat work.

E. Supplier and Type / Grade of asphaltic emulsion to include the type of modifier polymer for polymer modified asphaltic emulsion and a copy of the specified test results for polymer modified asphaltic emulsion.

F. For Asphaltic Emulsions and Polymer Modified Asphaltic Emulsion, the

Contractor shall ensure that an authorized laboratory perform the quality control sampling and testing at the specified frequency and location in conformance with the (WSDOT) “Standard Specifications”.

G. Aggregate samples shall not be delivered to the NCA. Contractor shall furnish the Third-Party Testing Agency with aggregate samples for required

Contractor paid Third-Party testing.

H. For Aggregate, the Contractor shall ensure that an authorized laboratory must perform sampling and testing at the specified frequency and location.

The aggregate should meet (WSDOT) specified polishing values and the following requirements as outlined in Section 4.2.2 “Quality Tests” of the ISSA-A105:

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I. Aggregate Test Results shall be forwarded to the Project Manager for review and approval prior to any delivery or placement of the material.

When tested in accordance with AASHTO T 27 (ASTM C 136) and AASHTO T 11

(ASTM C 117), the mix design aggregate gradation shall be within the gradation band of “TYPE II” for this Project as outlined below:

J. The gradation of the aggregate stockpile shall not vary by more than the stockpile tolerance from the mix design gradation (indicated in the table above) while also remaining within the specification gradation band. The percentage of aggregate passing any two successive sieves shall not change from one end of the specified range to the other end. The aggregate will be accepted at the job location or stockpile based on five gradation tests sampled according to AASHTO T 2 (ASTM D 75). No blending of aggregate onsite will be allowed.

K. At least ten (10) days before starting placement of a Slurry Seal Coat

Roadway Treatment, submit a laboratory report of test results and the

Proposed Mix Design from an authorized laboratory.

L. The authorized laboratory must sign the laboratory report and Proposed

Mix Design. This information shall be forwarded by email to the Project

Manager for review and approval prior to any Contractor work. The report must clearly show the proportions of aggregate, mineral filler, and emulsified asphalt based on the dry weight of the aggregate.

M. If the Proposed Mix Design consists of the same materials covered by a previous laboratory report, such previous laboratory report must include material testing data performed within the previous three (3) months for consideration and approval by the NCA Project Manager.

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N. If any of the materials in the Proposed Mix Design changes, submit a new

Proposed Mix Design and laboratory report at least seven (7) days before starting Slurry Seal work.

1.7 CONTROL OF WORK AND MATERIALS

A. The Contractor is responsible for the proper coordination of all contractors, utilities, and subcontractors engaged in the work within and adjacent to the contract site.

B. All field and Laboratory materials testing by the Contractor will follow methods described in the (WSDOT) Materials Manual M 46-01.31.

C. All work which does not conform to the requirements of the Contract and

Technical Specifications shall be considered unacceptable. The COR may direct the Contractor to remove any portion of the work performed under this contract for inspection or for any other purpose.

D. All work shall be in satisfactory condition at the time of contract acceptance. Any work done or materials used without inspection by an authorized Contracting Officer Representative may be ordered removed and replaced at the Contractor's expense.

E. Unacceptable work, whether caused by poor work, defective materials, damage via carelessness or any other cause found to exist prior to the final acceptance of the work, shall be removed immediately and replaced by the Contractor in an acceptable manner as determined by the COR.

F. All Materials shall be inspected, sampled, and tested by a state certified testing company paid for by the Contractor. Contractor shall submit to the Project Manager and COR the qualifications and certifications of such

Testing Company within seven (7) days of the Notice to Proceed.

G. Once the Testing Company is approved by the Project Manager, the

Contractor shall submit to the Project Manager and COR a detailed Testing

Schedule seven (7) days in advance of any work.

H. Whenever any specification provides for Manufacturer’s Certification, Material Certification or Approved List as a Basis of Acceptance, the NCA reserves the right to sample and / or test material in any shipment prior to incorporation in the work.

I. Any material which is rejected because of failure to meet the required tests or that has been damaged to cause rejection, shall be immediately removed from the site of the work by the Contractor at no additional cost to the NCA.

J. All damage, direct or indirect, of whatever nature resulting from the performance of the work or resulting to the work during its progress from

32 12 36 - 6 whatever cause, including omissions and supervisory acts of the VA, shall be borne and sustained by the Contractor, and all work shall be solely at its risk until it has been finally inspected and accepted by the COR.

K. The Contractor shall manage all surplus materials and waste generated in the performance of the contract in accordance with applicable federal, state, and local laws and regulations.

L. Nothing herein is intended to prevent the Contractor from removing surplus materials or waste to appropriate off-site locations for beneficial reuse, recovery, or recycling purposes.

1.8 APPLICABLE PUBLICATIONS

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

B. Washington State Department of Transportation (WSDOT):

1. (WSDOT) “Standard Specifications” M 40-10

2. (WSDOT) “Pavement Policy”, September 2018

3. (WSDOT) “Construction Manual” M 41-01.33

4. (WSDOT) “Materials Manual” M 46-01.31

C. American Association of State Highway &Transportation Officials (AASHTO):

HMWB....................Standard Specifications for Transportation

Materials and Methods of Sampling and Testing, 2018 Edition

MP32-17.................Standard Specification for Materials for Slurry

Seal

M 208-18................Standard Specification for Cationic Emulsified

Asphalt

R 66-16.................Standard Practice for Sampling Asphalt

Materials

T 11-05.................Standard Method of Test for Materials Finer

Than 75-µm (No. 200) Sieve in Mineral

Aggregates by Washing

T 27-14.................Standard Method of Test for Sieve Analysis of

Fine and Coarse Aggregates

T 44-14.................Standard Method of Test for Solubility of

Bituminous Materials

T 49-15.................Standard Method of Test for Penetration of

Bituminous Materials

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T 51-09.................Standard Method of Test for Ductility of

Asphalt Materials

T 59-16.................Standard Method of Test for Emulsified Asphalts

T 228-09................Standard Method of Test for Specific Gravity of

Semi-Solid Asphalt Materials

T 255-00................Standard Method of Test for Total Evaporable

Moisture Content of Aggregate by Drying

T 302-15................Standard Method of Test for Polymer Content of

Polymer-Modified Emulsified Asphalt Residue and

Asphalt Binders

T 335-09................Standard Method of Test for Determining the

Percentage of Fracture in Coarse Aggregate

D. American Society for Testing and Materials (ASTM):

C29-17..................Standard Test Method for Bulk Density ("Unit

Weight") and Voids in Aggregate

C117-17.................Standard Test Method for Materials Finer than

75-μm (No. 200) Sieve in Mineral Aggregates by

Washing

C127-15.................Standard Test Method for Relative Density

(Specific Gravity) and Absorption of Coarse

Aggregate

C128-15.................Test Method for Relative Density (Specific

Gravity) and Absorption of Fine Aggregate

D5-15...................Standard Test Method for Penetration of

Bituminous Materials

D8-18...................Terminology Relating to Materials for Roads and

Pavements

D36-14..................Standard Test Method for Softening Point of

Bitumen

D70-18..................Standard Test Method for Density of Semi-Solid

Asphalt Binder

D113-17.................Standard Test Method for Ductility of Asphalt

Materials

D140-16.................Practice for Sampling Bituminous Materials

D242-14.................Standard Specification for Mineral Filler for

Bituminous Paving Mixtures

D244-17.................Standard Test Methods and Practices for

Emulsified Asphalts

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D977-17.................Standard Specification for Emulsified Asphalt

D1073-16................Standard Specification for Fine Aggregate for

Asphalt Paving Mixtures

D2042-15................Standard Test Method for Solubility of Asphalt

Materials in Trichloroethylene

D2170-10................Standard Test Method for Kinematic Viscosity of

Asphalts

D2397-17................Standard Specification for Cationic Emulsified

Asphalt

D2419-14................Standard Test Method for Sand Equivalent Value of Soils and Fine Aggregate

D3111-10................Standard Test Method for Flexibility

Determination of Hot-Melt Adhesives by Mandrel

Bend Test Method

D3910-15................Standard Practices for Design, Testing, and

Construction of Slurry Seal

D5249-16................Standard Specification for Backer Material for

Use with Cold- and Hot-Applied Joint Sealants in Portland-Cement Concrete and Asphalt Joints

D5329-16................Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphalt

Pavements and Portland Cement Concrete

Pavements

D6433-18................Standard Practice for Roads and Parking Lots

Pavement Condition Index Surveys

D6690-15................Standard Specification for Joint and Crack

Sealants, Hot Applied, for Concrete and Asphalt

Pavements

D6930-10................Standard Test Method for Settlement and Storage

Stability of Emulsified Asphalts

D6933-13................Standard Test Method for Oversized Particles in

Emulsified Asphalts (Sieve Test)

D6936-17................Standard Test Method for Determining

Demulsibility of Emulsified Asphalt

D8099-17................Standard Specification for Asphalt Emulsion

Pavement Sealer (Mineral Colloid or Chemically

Stabilized Type)

E70-15..................Standard Test Method for pH of Aqueous

Solutions with the Glass Electrode

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E. International Slurry Seal Surfacing Association (ISSA):

A105-10.................Recommended Performance Guidelines for

Emulsified Asphalt Slurry Seal

PART 2 - MATERIAL / EQUIPMENT

2.1 GENERAL

A. All products and materials shall come from the Washington State Department of Transportation (WSDOT) approved sources and products listing.

B. Asphalt emulsion, aggregates, mineral filler, and additives used in the slurry seal work for this project shall be in conformance with the material requirements outlined in Section 5-02.2 and Division 9 –

“Materials” of the Washington State Department of Transportation

“Standard Specifications” (M 41.10 latest edition).

C. The Contractor shall provide all required and suitable Slurry Seal equipment, surface preparation equipment, safety & traffic control equipment, hand tools, and other support necessary to perform the work.

2.2 CRACK SEAL

A. Crack Treatment Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphalt Pavements and Portland Cement Concrete Pavements shall conform with ASTM D5329 and Section 5-01.3(8) “Sealing Existing Longitudinal and

Transverse Joint” of the (WSDOT) “Standard Specifications”.

B. For this Project the hot pour rubber-modified asphalt shall be used unless the Contractor can demonstrate the preparation and use of other type of crack seal material.

C. Contractor shall ensure that the hot-applied crack treatment material is sampled at least once per Project in the presence of the COR. Submit test results to the Project Manager and COR within 48 hours.

D. Crack Treatment Material Testing shall be in conformance with Section 9-

04 “Joint and Crack Sealing Materials” of the (WSDOT) “Standard

Specifications”.

2.3 ASPHALT EMULSION

A. Asphalt emulsion used in the Slurry Seal shall be “Polymer Modified

Cationic Quick Setting” (PMCQS 1H). Cationic Emulsified Asphalt meeting the requirements of AASHTO M 208 Table 1.

B. Asphaltic emulsions must be composed of a bituminous material uniformly emulsified with water and an emulsifying or a stabilizing agent. Polymer modified asphaltic emulsion must contain a polymer.

32 12 36 - 10

C. Each load of emulsified asphalt shall be accompanied with a Certificate of Analysis/ Compliance to assure that it is the same as that used in the mix design. Submit to Project Manager and COR.

D. Asphaltic Emulsion must be homogeneous during time of application.

Contractor shall guard against mixing different classes, types, and grades of emulsified asphalt in storage tanks, transports, and distributors.

E. Sample Asphaltic Emulsion under AASHTO T 59-16 “Standard Method of Test for Emulsified Asphalts”.

F. The Project Manager may waive the settlement test if the asphaltic emulsion is used in less than 5 days from the time the sample is taken.

G. NO time during the production, handling, transportation, or storage shall the Asphaltic Emulsion be exposed to temperatures below 40 degrees F.

H. Contractor shall ensure that the Asphaltic Emulsion is not contaminated or mixed with any other emulsion or other chemicals.

2.4 SLURRY SEAL EQUIPMENT

A. All equipment, tools, and machines used in the application of slurry seal shall be maintained in satisfactory working condition at all time.

B. All equipment used in the Slurry Seal coat pavement treatment work shall be in conformance with Item 6 – “Equipment” of the ISSA-A105 Guideline.

C. The Slurry Seal Equipment shall be specifically designed and manufactured to apply slurry seal. The material shall be mixed by an automatic-sequenced, self-propelled, slurry seal mixing machine of either truck-mounted or continuous-run design.

D. Mixing and spreading equipment for Slurry Seals must proportion the asphaltic emulsions, water, aggregate, and any additives by volume. Slurry

Seal Equipment Calibration requirements should conform with Item 7

“Calibration” of the ISSA-A105 Guideline.

E. The mixture shall be placed uniformly by means of a Spreader Box attached to the paver and mechanically equipped with augers to agitate and spread the material evenly throughout the box.

F. The Slurry Seal mixture shall have the proper consistency as it enters the Spreader Box. Spraying of additional water into the Spreader Box will not be permitted.

G. A front seal on the Spreader Box shall be utilized to ensure no loss of the mixture at the road contact point. The rear seal shall act as final strike-off and shall be adjustable.

32 12 36 - 11

H. The Spreader Box and rear seal shall be designed and operated to provide uniform mix consistency behind the box. The Spreader Box shall be suitable to side shift to compensate for variations in the pavement width.

I. A burlap drag or other approved screed may be attached to the rear of the

Spreader Box to provide a highly textured uniform surface.

2.5 AGGREGATE

A. Aggregates shall be “TYPE II” clean, high quality, hard, abrasion resistant, durable, and cubical in shape and in conformance with Section

1.6 “Submittals” of this Technical Specifications” and Section 4 –

“Materials” of ISSA-A105.

B. Slag and Calcareous aggregates such as limestone and dolostone are not allowed to be used in the Mix Design with the proposed cationic emulsion.

C. Aggregates shall be handled and stored in a manner that avoids contamination, avoids moisture entrapment, prevent inter-mingling, segregation, and degradation of the material.

2.6 MINERAL FILLERS & ADDITIVES

A. Mineral filler may be used to improve mixture consistency and to adjust mixture breaking and curing properties.

B. If a mineral filler is used, it must be Type I or Type II Portland cement.

C. When a mineral filler is used during Mix…