CTR071645_Contract_Documents.pdf

Procurement

ATTACHMENT ONE (1)

OFFER AND ACCEPTANCE

Solicitation No: BPM006039 Available online at https://app.az.gov

Rev 09/2022

OFFER

TO THE STATE OF ARIZONA:

The undersigned hereby offers and agrees to perform in compliance with all terms, conditions, specifications and amendments of this solicitation and any written exceptions in the offer. Signature also acknowledges receipt of all pages indicated in the Table of Contents.

Offeror (Company) Name Signature of Person Authorized to Sign Offer

Address Printed Name Date

City State Zip Title

Email Address Phone Number

Company Email Address Fax Number

By signature in the Offer section above, the Offeror certifies that the submission of the Offer did not involve collusion or other anticompetitive practices.

ACCEPTANCE OF OFFER (FOR DEPARTMENT USE ONLY)

The Contractor is now bound to perform based upon Contract Number _________________________________including all terms, conditions, specifications, amendments, etc., and the Contractor's offer as accepted by the state.

The Contractor is hereby cautioned not to commence any billable work or provide any material, service or construction under this contract until contractor receives a purchase order document.

State of Arizona

Effective this day of 20

Procurement Officer Awarded Date

Southwest Slurry Seal LLC

8211 W. Sherman St.

Tolleson AZ 85353 jabram@southwestslurryseal.com 623-582-1919 beckyl@southwestslurryseal.com 623-434-8805

Jeff Abram

- Director of Sales/Estimating

3/28/2024

DocuSign Envelope ID: FABCFF77-08A5-43E5-BB7F-30884AC2C074

May

5/2/2024

2 24

DocuSign Envelope ID: 3673B5D2-6B0F-4F17-839C-6BC4D03936D0

CTR071645

https://app.az.gov/

Rev. 05/2023

STATE OF ARIZONA

ARIZONA DEPARTMENT OF TRANSPORTATION

1655 W. Jackson St., MD 100P Phoenix, AZ 85007

REQUEST FOR PROPOSAL

SOLICITATION NUMBER: BPM006039

DESCRIPTION: Slurry and Micro-Surfacing Services

QUESTIONS: Inquiries regarding the solicitation are to be submitted online through the State’s e-Procurement system, Arizona Procurement Portal (APP) (https://app.az.gov/) using the Discussion Forum tab.

OFFERORS ARE STRONGLY ENCOURAGED TO READ THE ENTIRE SOLICITATION.

Stacy Wiesner Procurement Officer Phone: 602.712.6939 Email: swiesner@azdot.gov

This solicitation is issued in accordance with A.R.S. §41-2534 and A.A.C. R2-7-C301 et seq., Competitive Sealed Proposals.

“An Equal Opportunity Agency”

The Arizona Department of Transportation, in accordance with the provisions of Title VI of the Civil Rights Act of 1964 (78 Stat. 252.42 U.S.C. §§ 2000d-4) and the Americans with Disabilities Act (ADA), hereby notifies all bidders that it will affirmatively ensure that any contract entered into pursuant to this advertisement, disadvantaged business enterprises will be afforded full and fair opportunity to submit bids in response to this invitation and will not be discriminated against on the grounds of race, color, national origin in consideration for an award.

Persons that require a reasonable accommodation based on language or disability should contact ADOT’s Procurement Office by phone (602) 712-7466. Requests should be made as early as possible to ensure the State has an opportunity to address the accommodation.

Las personas que requieran asistencia (dentro de lo razonable) ya sea por el idioma o discapacidad deben ponerse en contacto con ADOT (602) 712-7466.

mailto:swiesner@azdot.gov

TABLE OF CONTENTS

Solicitation No: BPM006039 Available online at

SECTION PAGE

Notice 1

Table of Contents 2

Scope of Work 3

Special Terms and Conditions 50

Uniform Terms and Conditions 59

EXHIBITS

1 - Title VI/Non-Discrimination Assurances Appendix A 76

2 - Title VI/Non-Discrimination Assurances Appendix E 77

3 - ADOT Maintenance Boundaries Map 78

4 - Task Assignment 79

5 - Vendor Performance Report 81

6 - Daily Work & Traffic Control Activity Report 82

7 - Road Closure Guidelines 84

8 - Safety Program Plan Requirements 90

9 - Quarterly Usage Report 91

SCOPE OF WORK

1. Statement of Need

1.1. Pursuant to the Arizona Procurement Code, A.R.S. §41-2501 et seq., the State of Arizona Department of Transportation (Department), has a requirement for Slurry and Micro-Surfacing Services throughout the State of Arizona.

2. Introduction and Background

2.1. The Department intends to establish an “On Call” term contract to provide various slurry and micro surfacing services statewide.

2.2. The contract contains line items with fixed prices that are identified as not-to-exceed or maximum unit price. For those line items, Contractors may provide quotes on a Task Assignment request where the unit price is equal to or less than the unit price in the contract

2.3. As part of any slurry or micro-surfacing, the Contractor may be required, if requested by the Department, to provide all traffic control and/or temporary pavement marking work.

2.4. In addition to slurry and micro-surfacing services, the Contractor may be required, if requested by the Department, to provide micro-milling services. Micro-milling is needed to efficiently remove a thin layer of asphalt surface to achieve specified surface smoothness and texture. This involves precision milling using specialized equipment to enhance road safety, prolong pavement surface, and improve overall road quality.

2.5. If the Contractor does not provide micro-milling services, the Contractor shall coordinate with the Department. All Contractors on-site shall conduct themselves in a professional and courteous manner.

3. General Requirements

3.1. Work Locations

3.1.1. The service area includes various locations within the Northeast, Southeast, Central, North

Central, South Central, Northwest and Southwest Maintenance Districts. Refer to ADOT Maintenance Boundaries Map, Exhibit 3.

3.1.2. Some work areas may be located in Native American Tribal Communities. The Contractor shall adhere to all Tribal rules and regulations, including any labor requirements, taxes, fees, licenses, permits or conditions that may be imposed by the Tribal community or reservation. Refer to Special Terms and Conditions, Paragraph 21 “Licenses, Permits, Certifications”.

3.1.3. The Contractor must adhere to the National Forest Services rules and regulations when work areas are located in the National Forest. The Contractor shall also comply with the Arizona Department of Transportation Standard Specifications for Road and Bridge

Construction current Edition, including errata and addenda, Section 107.12, Forest Protection. Refer to the following links:

Standard Specifications - https://azdot.gov/business/contracts-and-specificatons/specifications

National Forest - https://www.fs.usda.gov/about-agency/regulations-policies/laws-regulations

3.1.4. Any such permits and/or conditions that result in additional costs may be considered for direct reimbursement by the Department on a case-by-case basis. Such costs will normally be considered by the Department as a direct expense that has no allowance for overhead or handling costs. The Contractor will only be able to be reimbursed per the actual cost of that additional cost.

3.2. Protection of Existing Features

3.2.1. The Contractor shall take all necessary precautions to prevent slurry seal or other materials used in the work from entering or adhering to gutters, gratings, hydrants or valve boxes, manhole covers, bridge or culvert decks, permanent road markers (ceramic and reflective), and other existing fixtures.

3.2.2. Immediately after surfacing, the Contractor shall clean and leave existing features in a condition satisfactory to the Department

3.2.3. Manhole covers, drains, grates, catch basins and other such utility structures shall be protected and covered with plastic or building felt prior to paving and also shall be clearly referenced for location and adjustment after paving, at no additional cost to the Department.

3.3. Work Details

3.3.1. The Contractor shall furnish all of the necessary labor materials, and equipment to effectively perform the required services in accordance with the specifications described herein and as directed by the Department within the scope of the contract.

3.3.2. The Contractor shall be responsible for coordinating all slurry seal and micro-surfacing work. The Contractor may also be responsible for coordinating micro-milling, temporary pavement marking, traffic control, if requested by the Department.

3.3.3. The materials and services supplied under this contract shall conform to the Arizona

Supplement to the Manual on Uniform Traffic Control Devices (MUTCD), and ADOT Traffic Control Design Guidelines, current Edition, including errata and addenda. Refer to the following links:

Standard Specifications – https://azdot.gov/business/contracts-and-specifications/specifications-pay-items-list https://app.az.gov/ https://azdot.gov/business/contracts-and-specificatons/specifications https://azdot.gov/business/contracts-and-specificatons/specifications https://www.fs.usda.gov/about-agency/regulations-policies/laws-regulations https://www.fs.usda.gov/about-agency/regulations-policies/laws-regulations https://azdot.gov/business/contracts-and-specifications/specifications-pay-items-list https://azdot.gov/business/contracts-and-specifications/specifications-pay-items-list

Federal Highway Administration (FHWA) – https://www.fhwa.dot.gov

American Association of State Highway and Transportation Officials (AASHTO) – http://www.aashto.org

Traffic Guidelines and Processes (TGP) – https://azdot.gov/business/engineering-and-construction/traffic/guidelines-and-processes

American Society of Testing Materials (ASTM) – http://www.astm.org

American Traffic Safety Service Association (ATSSA) – https://www.atssa.com

Approved Products List (APL) – https://azdot.gov/planning/research-center/product-evaluation-program

International Slurry Seal Association – https://www.slurry.org

Occupational Safety and Health Administration (OSHA) – https://www.osha.gov

Manual on Uniform Traffic Control Devices (MUTCD) – https://mutcd.fhwa.dot.gov/kno_2009r1r2r3.htm

3.4. Work Schedule

3.4.1. The Contractor shall provide the Department with a Work Schedule and an estimated work completion date prior to beginning an assignment of work commencing. The schedule shall be defined prior to commencement of work, however, the Department reserves the right to make adjustments to the schedule at any time in order to avoid conflict with highway construction or maintenance operations, or to better serve the Department’s needs.

3.4.2. All work shall be performed during the time requested by the Department. All work hours and days will be subjected to restrictions that are established by the Department.

3.4.3. The Contractor’s work schedule must reflect adequate time for completion of all routine work activities on a daily, weekly and if necessary, monthly basis.

3.4.4. The Contractor shall adhere to the approved work schedule and shall complete all work during the calendar week in which it is scheduled unless circumstances occur which are beyond the control of the Contractor.

3.5. Call Out Notification

3.5.1. The Department shall notify the Contractor by phone, or email when work is needed and issue a Task Assignment Exhibit 4, advising the Contractor of the work location and the extent of the work required.

3.5.2. Within fourteen (14) calendar days after receipt of the Task Assignment, the Contractor shall provide the Department with a proposed work schedule. The work schedule shall include the name and telephone number(s) of the Contractor’s On-Site Supervisor who will oversee the work performed, a quote reflecting the number of estimated hours for the work, work plan that defines the necessary pavement marking work and the needed traffic control plans if temporary pavement marking services is requested, anticipated start and completion dates, equipment, parts, supplies and cost to perform the requested service.

https://app.az.gov/ https://www.fhwa.dot.gov/ http://www.aashto.org/ https://azdot.gov/business/engineering-and-construction/traffic/guidelines-and-processes https://azdot.gov/business/engineering-and-construction/traffic/guidelines-and-processes http://www.astm.org/ https://www.atssa.com/ https://azdot.gov/planning/research-center/product-evaluation-program https://azdot.gov/planning/research-center/product-evaluation-program https://www.slurry.org/ https://www.osha.gov/ https://mutcd.fhwa.dot.gov/kno_2009r1r2r3.htm

3.5.3. No work shall begin until the quote is approved by the Department and a purchase order is issued. Deviation from the amount reflected on the quote which results in an increased cost to the Department must be approved in writing prior to the commencement of work.

Any work that is done by the Contractor without proper authorization shall not be eligible for payment.

3.5.4. All Contractor generated plans and schedules are subject to the Department’s approval.

The Department reserves the right to make adjustments in the schedule at any time to avoid conflict with highway construction or maintenance operations or to better serve the Department’s needs. Any change to the schedule and/or plan must be submitted in writing for review and approval. No work shall be scheduled without prior written approval from the Department.

3.5.5. The Contractor shall begin work within fourteen (14) calendar days including weekends and

State holidays) of the Department’s purchase order issuance, unless otherwise approved by the Department.

3.5.6. The Contractor shall be responsible for verifying quantities prior to start of any project. All changes must be approved by the Department prior to the start of work. Any changes to the quantities and/or scope encountered once the project begins shall be immediately brought to the attention of the Department. The changes must be reviewed and approved before any additional and/or new work is done.

4. Specific Requirements

4.1. Slurry Seal – General

4.1.1. The work described herein shall consist of constructing a slurry seal on an existing asphaltic concrete pavement surface. This specification covers the materials, equipment, and construction procedures for resurfacing of existing paved surfaces with a slurry seal.

4.1.2. The slurry seal shall be a mixture of mineral aggregate, polymer modified emulsified asphalt, mineral filler, water and other additives, properly proportioned, mixed, and uniformly spread on the surface of pavement as specified herein and as directed by the

4.1.3. The slurry seal shall be applied as a homogeneous mat, adheres firmly to the prepared surface, and has a skid-resistant surface texture. The finished product shall have a uniform appearance and it shall be able to accept straight, rolling traffic within one (1) hour after placement without damage; however, stopping and starting traffic, and adverse weather conditions may require additional curing time.

4.2 Slurry Seal Materials – General

4.2.1. All materials shall be approved by the Department prior to the start of work. The Department reserves the right to sample and test any materials used on the project. All materials that do not meet specifications will be rejected.

4.2.2. For comparison purposes, the quantities provided have been calculated based on the information give in Table 1. Application rates are affected by the unit weight and gradation of the mineral aggregate and the demand of the surface to which the slurry seal is being applied. Exact quantities of emulsified asphalt and dry mineral aggregate shall be determined by mix design, or as directed by the Department.

TABLE 1

Material Type II Slurry Seal Type III Slurry Seal

Emulsified Asphalt, by weight of Dry Mineral Aggregate, percent

14 13

Dry Mineral Aggregate, pounds per square yard

17 22

4.3. Slurry Seal Materials - Emulsified Asphalt

4.3.1. Polymer modified, quick setting emulsified asphalt (QS-P or CQS-P) shall be used. A minimum of 2% polymer solids, by total weight of polymer and asphalt residue, shall be added prior to the millhead. The type and amount of polymer solids used shall be certified by the supplier.

4.3.2. The polymer modified asphalt shall be pre-approved and certified in accordance with ADOT

Materials Practice and Procedure Directive (P.P.D.) No.8, “Sampling, Testing and Acceptance of Emulsified Bituminous Materials”. As specified in P.P.D No. 8, two (2) copies of the appropriate certificate (Certificate of Compliance or Certificate of Analysis), conforming to the requirements of Subsection 106.05 of the specifications, shall accompany each shipment (delivery unit) of emulsion to the project.

4.3.3. The polymer modified emulsified asphalt shall conform to the requirements of Table 2.

Table 2 Polymer Modified Emulsified Asphalt (QS-P or CQS-P)

Tests on Emulsion Test Method Requirements

Viscosity, Saybolt Furol seconds @ 25°C (77°F)

AASHTO T-59 20-100

Sieve Test, retained on No. 20% AASHTO T-59 0.10 Max (1)

Particle Charge AASHTO T-59

Storage Stability Test, 24 hours, % AASHTO T-59 1.0 Max

Percent Asphalt Residue by Evaporation Arizona Test Method 512 (2)

57 Min

Tests on Residue by Distillation AASHTO T-59 [176.7°C (350°F) Max]

Test Method Requirements

Original Dynamic Shear of Residue @64°C, G*/Sin kPa

AASHTO T-315 1.00 Min

Penetration 4°C (39.2°F), 200 grams, 60 seconds, 0.1 mm

AASHTO T-49 20 Min

Elastic Recovery @ 77°F (25°C), % AASHTO T- 301 (3) 55 Min

(1) The maximum of 0.1% applies to the preapproval of emulsions in accordance with P.P.D. 8. A maximum of 0.3% is allowed for emulsions that are sampled the project site.

(2) The percent of asphalt residue will be determined in accordance with the requirements of Arizona Test Method 512; however, in the case of dispute the percent of asphalt residue by distillation [AASHTO T59, modified to 176.7°C (350°F)] will be used.

(3) Testing shall be performed on residue by distillation, not on residue by oven evaporation.

4.3.4. Emulsified asphalt shall be measured by the ton.

4.4. Slurry Seal Materials - Mineral Aggregate

4.4.1. There is no Department furnished source of aggregate material. The Contractor shall provide a source in accordance with the requirements of Section 1001 of the ADOT Standard Road and Bridge specifications. Refer to the following link:

https://azdot.gov/business/contracts-and-specifications

4.4.2. Mineral aggregate shall consist of sound and durable sand and/or crushed stone. The materials shall be free from vegetation and other deleterious substances. Aggregates shall be 100% crushed with no rounded particles. No natural sand will be allowed.

4.4.3. Unless otherwise specified by the Department, the gradation shall be Type III. The gradation of the mineral aggregate, when tested in accordance with the requirements of Arizona Test Method 201, shall conform to the requirements of Table 3.

Table 3

Sieve Size

Percent Passing Sieves

Mix Design Grading Limits Production Tolerances (See note below) TYPE II TYPE III

3/8 inch 100 100 ----

No. 4 90-100 70-90 ± 5

No. 8 65-90 45-70 ± 5

No. 16 45-70 28-50 ± 5

No. 30 30-50 19-34 ± 5

No. 50 18-30 12-25 ± 4

No. 100 10-21 7-18 ± 3

No.200 5.0-15.0 5.0-15.0 ± 3.0

Note:

The allowable tolerance during production will be determined by applying the production tolerances to the mix design target values. However, the allowable production tolerance shall not fall outside the mix design grading limits in this table.

4.4.4. The mineral aggregate shall conform to the requirements of Table 4 when tested in accordance with the applicable test methods.

Table 4 Mineral Aggregate Characteristics

Characteristic Test Method Requirements

Sand Equivalent

AASHTO T 176

(After thoroughly sieving the sample, no additional cleaning of the fines from the plus No. 4 material is required)

Minimum 60

Carbonates Arizona Test Method 238 Maximum 20%

Abrasion AASHTO T 96 500 Rev., Max. 40%

Fractured Coarse Aggregate Particles

Arizona Test Method 212 Minimum 95% (with at least one fractured face)

Uncompacted Void Content Arizona Test Method 247 Minimum 45.0%

4.4.5. Tests on aggregates outlined in Table 4, other than abrasion, shall be performed on materials furnished for mix design purposes ad composited to the mix design gradation.

Abrasion testing shall be performed separately for each source of mineral aggregate. All sources shall meet the requirements for abrasion. If desired, abrasion testing may be performed utilizing the parent aggregate from each source. Historical abrasion values may be supplied on sources provided the testing was conducted within the past two (2) years.

4.4.6. Mineral aggregated shall be measured by the ton, excluding the weight of any moisture.

4.5. Slurry Seal Materials - Mineral Filler

4.5.1. Mineral filler, required by the mix design, shall be Type I or Type II Portland cement conforming to the requirements of ASTM C 150. The mineral filler shall be added in the approximate amount of 1% by weight of the total mix; however, the exact amount will be determined by the mix design.

4.5.2. The source of Portland cement must be on the ADOT Approved Materials Source List (APL), as referenced in Materials Policy and Procedure Directive (P.P.D.) No. 13. “Certification and Acceptance of Hydraulic Cements, Fly Ash, Natural Pozzolan, Silica Fume, and Lime”. Refer to the following link: https://azdot.gov/business/contracts-and-specifications .

4.5.3. The mineral filler shall be added to the slurry seal mixture by an approved method that will ensure uniform distribution and proper control.

4.6. Slurry Seal Materials - Water

4.6.1. The water used shall be free of any injurious impurities. Potable water obtained from a public utility distribution lines will acceptable. The Contractor shall state the source of water.

4.7. Slurry Seal Materials - Additives

4.7.1. Additives may be used to accelerate or retard the breaking of the emulsified asphalt and the set time of the slurry seal mixture, or to improve the resulting finished surface.

4.7.2. Appropriate additives, and their applicable use range, shall be specified in the mix design.

4.8. Slurry Seal Materials- Mix Design

4.8.1. The Contractor shall provide a mix design which has been sealed, signed, and dated by a professional engineer experienced in the preparation of slurry seal mix designs and approved by the Department.

4.8.2. Compatibility of the aggregate, mineral filler, water, additives and polymer modified emulsified asphalt shall be evaluated during the mix design process.

4.8.3. All the materials used in the mix design shall be representative of the materials proposed by the Contractor for use on the project.

4.8.4. The mix design shall be approved by the Department prior to the start of slurry seal production. After the mix design has been approved, no material substitution will be permitted unless approved by the Department.

4.8.5. In addition to the other requirements stated herein, the mix design shall conform to the requirements of Table 5.

Table 5

Property Test Method Requirements

Residual Asphalt Content ASTM D 2172 7.5% - 13% by weight of dry aggregate

Mineral Filler ---- Approximately 1% by weight of the total mix

Additives ---- As required for mix properties

Water ---- As required for mix properties

Wet Track Abrasion Test ASTM D 3910 75 g/ft² maximum

Wet Stripping ISSA TB-114 90% minimum

Slurry Seal Mixing Test, 70-85°F, seconds

ISSA TB 102 120 minimum

Slurry Seal Setting Test, 70-85°F, (1 hour cure)

ISSA TB 102 No Brown Stain

Slurry Seal Water Resistance Test, (70-85°F, 30 minute cure)

ISSA TB 102 No more than slight discoloration

Cure Time Test, 60-70 °F, minimum

ASTM D 3910 12Kg/cm torque, minimum

4.8.6. The mix design shall show the recommended proportions of aggregate, mineral filler, water, additive(s), and emulsified asphalt; and how the proportions are based (dry aggregate weight, total mix, etc.). The mix design must also show the allowable production tolerance for residual asphalt content.

4.8.7. The mix design shall also show the aggregate gradation, sand equivalent, percent carbonates, abrasion, fractured coarse aggregate particles, and uncompact void content of the aggregate used in the mix design.

4.9. Slurry Seal Equipment – Proportioning Devices

4.9.1. Individual volume or weight controls for proportioning mix components shall be provided and properly labeled. Proportioning devices shall be capable of determining the material output at any time.

4.9.2. The proportioning of emulsion, mineral filler, water, and additives shall be tied directly to aggregate flow.

4.10. Slurry Seal Mixing Equipment – General

4.10.1. The slurry seal mixer shall be a continuous flow-mixing unit, specifically designed and manufactured to be used for the application of slurry seals. It shall be capable of delivering water and also be able to accurately predetermine the proportion of aggregate and emulsified asphalt to the mixing chamber. It shall discharge the thoroughly mixed product on a continuous basis. The aggregate shall be pre-wet immediately prior to mixing with the emulsion. The mixing unit of the mixing chamber shall be capable of thoroughly blending all ingredients together. No violent mixing shall be permitted.

4.10.2. The mixing machine shall be equipped with an approved fines feeder that provides an accurate metering device or method to introduce a predetermined amount of mineral filler into the mixer at the same time and location that the aggregate is fed.

4.10.3. The mixing machine shall be equipped with a water pressure system and fog type spray bar, adequate for complete fogging of the surface preceding the spreading equipment, with a maximum application rate of 0.05 gallons per square yard. A calibrated control for aggregate and emulsified asphalt shall be provided and capable of accurately proportioning the material.

4.10.4. The machine shall be capable of a minimum speed of 60 feet per minute and shall not be allowed to exceed 180 feet per minute while in operation. Sufficient machine storage capacity to mix properly and apply a minimum of five tons of the slurry shall be provided.

4.10.5. The machine shall be a continuous-run machine capable of loading materials while continuing to apply slurry seals. Truck mounted mixing machines shall not be permitted.

4.11. Slurry Seal - Mixing Equipment- Calibration

4.11.1. Each slurry-mixing unit to be used in performance of the work shall be calibrated prior to use on each project. Previous calibration documentation covering the exact materials to be used may be accepted, provided they were made within the preceding twelve (12) months.

The documentation shall include an individual calibration of each material at various settings, which can be related to the machine metering device(s). No machine will be allowed to work on the project until the calibration has been completed and/or accepted.

4.12. Slurry Seal Spreading Equipment

4.12.1. The spreader box shall be equipped with a canvas or burlap drag to provide a highly textured, uniform surface texture. The drag shall be replaced as needed, and at least daily.

4.12.2. A mechanical type squeegee distributor equipped with flexible material shall be attached to the mixing unit. The flexible material shall be in contact with the surface to prevent loss of slurry from the distributor. The Contractor shall maintain the distributor so as to prevent loss of slurry on varying grades and the roadway crown by adjustments to ensure uniform spread. There shall be a means to side shift the spreader box and the rear strike-off shall be adjustable.

4.13. Slurry Seal Auxiliary Equipment

4.13.1. Areas, which cannot be reached with the slurry seal machine, shall be surfaced using hand squeegees to provide complete and uniform slurry seal coverage.

4.13.2. Approved squeegees and lutes shall be used to spread the mixture in areas inaccessible to the spreader box and other areas where hand spreading may be required.

4.14. Construction Requirements – Slurry Seal Test Strip

4.14.1. A test strip shall be constructed on the roadway at the beginning of the first day of production. The test strip shall be limited to 500 to 1000 feet in length and shall be placed in the same manner, and with the same materials and equipment, that will be used during the remainder of slurry seal placement.

4.14.2. The test strip shall not exhibit any signs of distress when exposed to traffic after curing for one (1) hour. The Department shall determine if performance of the test strip is satisfactory. If performance of the test strip is unsatisfactory, the test strip shall be removed and replaced, or repaired to the satisfaction of the Department, at no additional cost. After necessary adjustments are made, an additional test strip shall be constructed. If necessary, the Department may require that a new mix design be submitted for approval.

4.15. Slurry Seal - Weather Limitations

4.15.1. The slurry seal shall not be applied if either the pavement surface temperature or the air temperature is below 55°F and falling, but may be applied when both pavement and air temperature are above 45°F and rising. No slurry seal shall be applied when there is danger that the finished product will freeze within 24 hours following its placement. The mixture shall not be applied if weather conditions prolong opening to traffic beyond a reasonable time as determined by the Department.

4.15.2. At any time, the Department may require that the work cease or that the work day be reduced in the event that weather conditions, either existing or expected, are anticipated to have an adverse effect upon the slurry seal.

4.16. Slurry Seal - Surface Preparation

4.16.1. Immediately prior to applying the slurry seal, the Contractor shall clean the surface of all loose material, dirt, vegetation, and other objectionable material. If water is used, cracks shall be thoroughly dry before applying the slurry seal. The Department shall approve the surface preparation prior to applying the slurry seal.

4.17. Slurry Seal - Mixing and Application

4.17.1. The slurry seal mixture shall be proportioned in accordance with the mix design.

4.17.2. The Contractor shall determine the stockpile moisture content daily, and adjust the operation accordingly.

4.17.3. The slurry seal mixture shall be of the desired consistency when deposited in the spreader box and no additional materials shall be added to it. The mixing time shall be sufficient to produce a complete and uniform coating of the aggregate. No lumping, baling, or unmixed aggregate shall be permitted. The mixture shall be discharged into the spreader box at a sufficient rate to maintain an ample supply of material across the full width of the spreader box at all times. Overloading of the spreader box shall be avoided. No streaks, such as those caused by oversized aggregate, will be left in the finished surface. If excess oversize aggregate is encountered, the job will be stopped until the Contractor proves that the situation has been corrected. Any skips, lumps, streaks, or tears in the finished product will not be allowed. The Contractor shall repair any such deficiencies to the satisfaction of the Department, at no additional cost to the Department.

4.17.4. The slurry mixture shall possess sufficient stability so that premature breaking of the emulsified asphalt while the mixture is in the spreader box does not occur. The mixture shall be homogenous after mixing. During spreading, the mixture shall be free of excess water or emulsion and shall be free of segregation of the emulsion and aggregate fines from the coarser aggregate. Spraying of additional water into the spreader box is not allowed.

4.17.5. The surface of the existing pavement shall be pre-wetted by fogging with water ahead of the spreader box. The water used in pre-wetting the surface shall be applied such that the entire surface is damp with no apparent flowing water in front of the spreader box. The rate of application of the fog spray shall be adjusted during the day as the ambient temperature, surface texture, humidity, and dryness of the pavement surface changes.

4.17.6. The Contractor shall remove any debris associated with the performance of the work on a daily basis.

4.18. Slurry Seal - Joints

4.18.1. No excessive buildup, or uncovered areas of unsightly appearance, shall be permitted on longitudinal or transverse joints. An excessive overlap will not be permitted in longitudinal joints. The Contractor shall provide a minimum number of longitudinal joints throughout the project. When possible, longitudinal joints shall be placed on lane lines. Half passes and odd width passes will be used in minimum amounts. If half passes are used, they shall not be the last pass of any paved area.

4.19. Slurry Seal - Sampling and Testing Requirements

4.19.1. Mineral aggregate shall be sampled in accordance with Arizona Test Method 105.

4.19.2. At least two (2) weeks prior to the start of slurry seal production, the Department shall obtain a representative sample of mineral aggregate for testing. The material may be tested for gradation in accordance with Arizona Test Method 201, and shall conform to the production tolerances shown in Table 3. The sand equivalent, fractured coarse aggregate particles, and the uncompact void content shall conform to the requirements of Table 4. If the mineral aggregate does not meet these requirements, production shall not begin until the mineral aggregate is in compliance with these requirements.

4.19.3. For each 300 tons of mineral aggregate used in slurry seal production, the Department shall obtain a representative sample of mineral aggregate for gradation and moisture content testing. The material may be tested for gradation in accordance with Arizona Test Method 201, and shall conform to the production tolerances shown in Table 3. Should testing indicate results not meeting these requirements, operations shall cease and the Contractor shall have the option of providing a new mix design or correcting the deficiencies. The material shall be tested for moisture content in accordance with AASHTO T 265.

4.19.4. For each 600 tons of mineral aggregate used in slurry seal production, the Department shall obtain a representative sample of mineral aggregate for the determination of sand equivalent, fractured coarse aggregate particles, and uncompacted void content. The material shall conform to the requirements of Table 4 for these test characteristics. Should testing indicate results not meeting these requirements, operations shall cease and the Contractor shall have the option of providing a new mix design or correcting the deficiencies.

4.19.5. During slurry seal production, a representative sample of the emulsion shall be obtained for testing to determine the percent asphalt residue by evaporation. A sample shall be obtained, in accordance with Arizona Test Method 103, from each delivery unit of emulsion by the Contractor and witnessed by the Department. The emulsion shall conform to the requirements of Table 2 for percent asphalt residue by evaporation.

4.20. Micro-Surfacing - General

4.20.1. The work described herein shall consist of furnishing all materials and constructing micro-surfacing on an existing asphaltic concrete pavement surface. The micro-surfacing shall be a mixture of mineral aggregate, polymer modified emulsified asphalt, mineral filler, water, and other additives, properly proportioned, mixed, and spread on the pavement surface as specified herein and as directed by the Department.

4.20.2. The micro-surfacing shall be applied as a homogeneous mat, adhere firmly to the prepared surface, and have a skid-resistant surface texture. The finished product shall have a uniform appearance and it shall be able to accept straight, rolling traffic within one (1) hour after placement without damage; however, stopping and starting traffic, and adverse weather conditions, may require additional curing time.

4.20.3. The Contractor shall provide a minimum two (2) hour orientation session for project personnel (ADOT and Contractor’s), covering the construction process, materials control, and materials measurement by true weight delivered versus machine dial readings.

4.20.4. The Contractor shall provide to the Department, on a daily basis, the quantity of material delivered versus material placed through the micro-surfacing mixer based on dial gauge readings. The Department will independently verify all dial gauge readings, and weight of material delivered. This information will be used as a check against the mix design proportions.

4.21. Micro-Surfacing Materials – General

4.21.1. All materials shall be approved by the Department prior to the start of work.

4.21.2. The Department reserves the right to sample and test any materials used on the project. All materials that do not meet specifications will be rejected.

4.21.3. For comparison purposes, the quantities provided have been calculated based on the information given in Table 6. Application rates are affected by the unit weight and gradation of the mineral aggregate and the demand of the surface to which the micro-surfacing is being applied. Exact quantities of emulsified asphalt and dry mineral aggregate shall be determined by mix design, or as directed by the Department.

Table 6

Material Type II Micro-Surfacing Type III Micro- Surfacing

Emulsified Asphalt, by weight or Dry Mineral Aggregate, percent

14 13

Dry Mineral Aggregate, pounds per square yard

22 30

4.22. Micro-Surfacing Materials – Emulsified Asphalt

4.22.1. Polymer modified, cationic, quick setting (mixing grade) emulsified asphalt (CQS-1hP) shall be used. A minimum of 4% polymer solids, by total weight of polymer and asphalt residue, shall be added prior to the millhead. The type and amount of polymer solids used shall be certified by the supplier.

4.22.2. The polymer modified emulsified asphalt shall be pre-approved and certified in accordance with ADOT Materials Practice and Procedure Directive (P.P.D.) No. 8, “Sampling, Testing, and Acceptance of Emulsified Bituminous Materials”. As specified in P.P.D. No. 8, two (2) copies of the appropriate certificate (Certificate of Compliance or Certificate of Analysis), conforming to the requirements of Subsection 106.05 of the specifications, shall accompany each shipment (delivery unit) of emulsion to the project.

4.22.3. The polymer modified emulsified asphalt shall conform to the requirements of Table 7.

Table 7 Polymer Modified Emulsified Asphalt (CQS-1hP)

Tests on Emulsion Test Method Requirements

Viscosity, Saybolt Furol seconds @ 25°C (77°F) AASHTO T 59 20-100

Sieve Test, retained on No. 20, % AASHTO T 59 0.10 Max (1)

Particle Charge AASHTO T 59 Positive

Storage Stability Test, 24 hours, % AASHTO T 59 1.0 Max

Percent Asphalt Residue by Evaporation Arizona Test Method 512 (2)

60 Min

Tests on Residue by Distillation AASHTO T 59 [176.7°C (350°F Max.)]

Test Method Requirements

Kinematic Viscosity @ 135°C (275°F), cst AASHTO T 201 650 Min

Penetration, 25°C (77°F), 100 g, 5 seconds, 0.1 mm AASHTO T 49 40-90

Softening Point, °C AASHTO T 53 60 Min

Ductility, 25°C (77°F), 5 cm/minute, cm AASHTO T 51 60Min

Elastic Recovery @ 77°F (25°c), % AASHTO T 301(3) 55 Min

(1) The maximum of 0.1 percent applies to the preapproval of emulsions in accordance with P.P.D. No. 8. A maximum of 0.3 percent is allowed for emulsions that are sampled at the project site.

(2) The percent of asphalt residue will be determined in accordance with the requirements of Arizona Test Method 512; however, in the case of dispute the percent of asphalt residue by distillation (AASHTO T 59, modified to 176.7°C (350°F) will be used

(3) Testing shall be performed on residue by distillation, not on residue by oven evaporation.

4.22.4. Emulsified asphalt shall be measured by the ton.

4.23. Micro-Surfacing Materials – Mineral Aggregate

4.23.1. The Contractor shall provide a source in accordance with the requirements of Section 1001 of the specifications. Refer to the following link: https://azdot.gov/business/contracts-and-specifications

4.23.2. The mineral aggregate shall consist of sound, durable crushed stone or crushed gravel. The materials shall be free from vegetation and other deleterious substances. Aggregates shall be 100% crushed with no round particles. No natural sand will be allowed.

4.23.3. If rut filling is specified, mineral aggregate meeting the gradation requirements of Type III shall be used.

4.23.4. Unless otherwise specified by the Department, the gradation of the mineral aggregate shall be Type III. The gradation of the mineral aggregate, when tested in accordance with the requirements of Arizona Test Method 201, shall conform to the requirements of Table 8.

Table 8

Sieve Size

Percent Passing Sieves

Mix Design Grading Limits Production Tolerances (See Note

Below) Type II Type III

3/8 Inch 100 100 ---

No. 4 90-100 70-90 ± 5

No. 8 65-90 45-70 ± 5

No. 16 45-70 28-50 ± 5

No. 30 30-50 19-34 ± 5

No. 50 18-30 12-25 ± 4

No. 100 10-21 7-18 ± 3

No. 200 5.0 – 15.0 5.0 – 15.0 ± 3.0

Note: The allowable tolerance during production will be determined by applying the production tolerances to the mix design target values. However, the allowable production tolerance shall not fall outside the mix design grading limits in this table.

4.23.5. The mineral aggregate shall conform to the requirements of Table 9 when tested in accordance with the applicable test methods.

https://app.az.gov/

Table 9 Mineral Aggregate Characteristics

Characteristic Test Method Requirements

Sand Equivalent AASHTO T 176 (After thoroughly sieving the sample, no additional cleaning of the fines from the plus No. 4 material is required)

Minimum 60

Carbonates Arizona Test Method 238 Maximum 20%

Abrasion AASHTO T 96 500 Rev., Max. 40%

Fractured Coarse Aggregate Particles

Arizona Test Method 212 Minimum 95% (with at least one fractured face)

Uncompact Void Content Arizona Test Method 247 Minimum 45.0%

4.23.6. Tests on aggregates outlined in Table 9, other than abrasion, shall be performed on materials furnished for mix design purposes and composited to the mix design gradation.

Abrasion testing shall be performed separately for each source of mineral aggregate. All sources shall meet the requirements for abrasion. If desired, abrasion testing may be performed utilizing the parent aggregate from each source. Historical abrasion values may be supplied on sources provided the testing was conducted within the past two (2) years.

4.23.7. Mineral aggregate will be measured by the ton, excluding the weight of any moisture.

4.24. Micro-Surfacing Materials – Mineral Filler

4.24.1. Mineral filler, required by the mix design, shall be Type I or Type II Portland cement conforming to the requirements of ASTM C 150. The mineral filler shall be added by weight of dry aggregate as specified by the mix design. The source of Portland cement must be on the ADOT Approved Materials Source List (APL), as referenced in Materials Policy and Procedure Directive (P.P.D.) No. 13, “Certification and Acceptance of Hydraulic Cements, Fly Ash, Natural Pozzolan, Silica Fume, and Lime”.

4.24.2. The mineral filler shall be added to the micro-surfacing mixture by an approved method that will ensure uniform distribution and proper control.

4.25. Micro-Surfacing Materials – Water

4.25.1. The water used shall be free of any injurious impurities. Potable water obtained from public utility distribution lines will be acceptable. The Contractor shall state the source of water.

4.26. Micro-Surfacing Materials – Additives

4.26.1. Additives may be used to accelerate or retard the breaking point and set time of the micro-surface mixture, or improve the resulting finished surface.

4.26.2. Appropriate additives, and their applicable use range, shall be specified in the mix design.

4.27. Micro-Surfacing Materials – Mix Design

4.27.1. The Contractor shall provide a mix design which has been sealed, signed, and dated by a professional engineer experienced in the preparation of micro-surfacing mix designs and approved by the Department.

4.27.2. Compatibility of the aggregate, mineral filler, water, additives, and polymer modified emulsified asphalt shall be evaluated during the mix design process.

4.27.3. All the materials used in the mix design shall be representative of the materials proposed by the Contractor for use on the project.

4.27.4. The mix design must be approved by the Department prior to the start of micro-surfacing production. After the mix design has been approved, no material substitution will be permitted unless approved by the Department.

4.27.5. In addition to the other requirements stated herein, the mix design shall conform to the requirements of Table 10.

Table 10

Property Test Method Requirements

Residual Asphalt Content ASTM D 2172 6.0% - 11.5% by weight of dry aggregate

Mineral Filler ---- 0.1% - 2.0% by weight of dry aggregate

Additives --- As required for mix properties

Water --- As required for mix properties

Mix Time @ 77°F ISSA TB-113 Controllable to 120 seconds minimum

Wet Track Abrasion Loss (1 hour soak)

ISSA TB-100 50 g/ft2 maximum

Wet Track Abrasion Loss (6 day soak)

ISSA TB-100 75 g/ft2 maximum

Wet Stripping ISSA TB-114 90% minimum

Wet Cohesion, @ 30 minutes minimum (Set)

ISSA TB-139 12 Kg/cm torque, minimum

Wet Cohesion, @ 60 minutes minimum (Traffic)

ISSA TB-139 20 Kg/cm torque, minimum

Loaded Wheel Sand Adhesion ISSA TB-109 50 g/ft² maximum

Classification Compatibility ISSA TB-144 11 Grade Points minimum (AAA, BAA)

Lateral Displacement ISSA TB-147 5% maximum

Specific Gravity after 1,000 cycles of 125 lb.

ISSA TB-147 2.10 maximum

4.27.6. The mix design shall include test results showing the quantitative effects of moisture content on the unit weight of the aggregate (bulking effect) according to AASHTO T 19.

4.27.7. The mix design must show the recommended proportions of aggregate, mineral filler, water, additive(s), and emulsified asphalt; and how the proportions are based (dry aggregate weight, total mix, etc.). The mix design must also show the allowable production tolerance for residual asphalt content.

4.27.8. The mix design will also show the aggregate gradation, sand equivalent, percent carbonates, abrasion, fractured coarse aggregate particles, and uncompacted void content of the aggregate used in the mix design.

4.28. Micro-Surfacing Equipment – Proportioning Devices

4.28.1. Individual volume or weight controls for proportioning mix components shall be provided and properly labeled. Proportioning devices shall be capable of determining the material output at any time.

4.28.2. The proportioning of emulsion, mineral filler, water, and additives shall be tied directly to aggregate flow.

4.29. Micro-Surfacing Mixing Equipment - General

4.29.1. The machine shall be specifically designed and manufactured to apply micro-surfacing. The material shall be mixed by an automatic sequenced, self-propelled micro-surfacing mixing machine. It shall be a continuous flow mixing unit that accurately delivers and proportions the mix components through a revolving multi-blade, double-shafted mixer. Sufficient storage capacity for all mix components is required to maintain an adequate supply to the proportioning controls.

4.29.2. The machine shall be a continuous run machine capable of loading materials while continuing to apply micro-surfacing. The machine shall be equipped to provide the operator with full control of the forward and reverse speeds during application. It shall be equipped with opposite-side driver stations to assist in alignment. The self-loading device, opposite-side driver stations, and forward and reverse speed controls shall be of original-equipment manufacturer design.

4.29.3. The machine shall be equipped with a water pressure system that provides a water spray immediately ahead of and outside the spreader box.

4.29.4. Truck mounted mixing machines shall not be permitted.

4.30. Micro-Surfacing Mixing Equipment – Calibration

4.30.1. Each mixing unit to be used in the performance of the work shall be calibrated in the presence of the Department prior to the start of micro-surfacing production. Previous calibration documentation covering the exact materials to be used may be acceptable, provided the calibration was performed within the preceding 60 days. The documentation shall include an individual calibration of each material at various settings that can be related to the machine metering devices. Any component replacement affecting material proportioning requires that the machine be recalibrated. No machine will be allowed to work on the project until the calibration has been completed and/or accepted. The ISSA Inspectors Manual describes a method that may be used for machine calibration. Refer to the following link: https://www.slurry.org

4.31. Micro-Surfacing Spreading Equipment

4.31.1. The mixture shall be agitated and spread uniformly in the surfacing box by means of twin-shafted paddles or spiral augers fixed in the spreader box. A front seal shall be provided to ensure no loss of the mixture at the road contact point. The rear seal shall act as a final strike-off and shall be adjustable. The spreader box and rear strike-off shall be so designed and operated that a uniform consistency is achieved and a free flow of material is provided to the rear strike-off. The spreader box shall have suitable means provided to side shift the box to compensate for the variations in the pavement geometry.

4.31.2. The spreading equipment shall be maintained free from buildup of the mixture on the paddles or side walls.

4.31.3. A secondary strike-off shall be provided to improve surface texture. The secondary strike-off shall be adjustable to match the width of the spreader box and allow for varying pressures to control the surface texture.

4.32. Micro-Surfacing Rut-Filling Equipment

4.32.1. When required, micro-surfacing material may be used to fill ruts or other depressions in the existing surface. Ruts shall be filled independently with a rut-filled box. Ruts may require multiple applications with the rut-filling box to restore the cross section. All rut-filling material should cure under traffic for at least twenty-four (24) hours before additional material is placed.

https://www.slurry.org/

4.33. Micro-Surfacing Auxiliary Equipment

4.33.1. Areas, which cannot be reached with the micro-surfacing machine, shall be surfaced using hand squeegees to provide complete and uniform…