5_PWS_FDR_FY22 (for Combined Syn Sol) Final.docx

Performance Work Statement

Production of Pavement Surface Model

Purpose and Scope The Airfields and Pavements Branch (APB) requires a pavement model to evaluate performance of flexible pavement structures when subjected to simulated aircraft loading conditions. As part of this research full-scale accelerated pavement testing on representative pavement structures will be conducted. These pavement structures require a surface layer of hot mix asphalt (HMA), double-bituminous surface treatments, and a high-performance surface treatment.

Work Listed below are specific items that will be provided by the APB and items that are to be provided by the contractor.

Work Items Provided by the APB:

1. All subgrade, base preparation and paving surface preparation.

2. Quality control operations:

a. Random sampling and testing will be conducted by the Contracting Engineer at ERDC.

b. Random samples may be taken at the plant, for specimen compaction, and tested for laboratory air voids and TSR. A portion of the same sample may be tested for theoretical maximum density (TMD), aggregate gradation, and asphalt content. Randomly selected cores shall be taken from the finished pavement mat and tested for density. Random sampling shall be in accordance with procedures contained in ASTM D 3665. The test results must demonstrate an in-place density of 92-96% of TMD. If test results fail to meet the required density, the test section shall be removed and replaced at no cost to the Government.

c. Determination of final compacted asphalt layer thickness will be performed using rod & level measurement techniques.

Work Items and Materials Provided by the Contractor:

HOT MIX ASPHALT

The Contractor shall provide a hot-mix asphalt surface course, complete and in-place, meeting the following requirements:

AGGREGATES

Coarse aggregate (defined as material retained on the No. 4 sieve (4.75 mm) shall consist of sound, tough durable particles free from material films that would prevent thorough coating and bonding with the asphalt material and free from organic matter and other deleterious substances. Provide coarse aggregate meeting the following requirements:

a. The percentage of loss shall not be greater than 40 percent after 500 revolutions when tested in accordance with ASTM C131.

b. The magnesium sulfate soundness loss shall not exceed 18 percent after 5 five cycles when tested in accordance with ASTM C88.

c. Coarse aggregate shall consist of at least 75 percent by weight of coarse aggregate containing at least two mechanically fractured faces when tested in accordance with ASTM D5821.

d. Coarse aggregate shall be generally cubical in shape and contain not greater than 20 percent flat and elongate particles at a 3:1 ratio when tested in accordance with ASTM D4791.

e. Clay lumps and friable particles shall not exceed 0.3 percent by weight when tested in accordance with ASTM C142.

Fine aggregate (defined as material passing the No. 4 sieve (4.75 mm) and retained on the No. 200 sieve (0.075 mm)) shall consist of clean, sound, tough durable particles free from clay, silt, or any objectionable material. Provide fine aggregate meeting the following requirements:

a. Quantity of natural sand added to the aggregate blend shall not exceed 15 percent by weight of total aggregate.

b. Individual fine aggregate sources shall have a sand equivalent value greater than 45 when tested in accordance with ASTM D2419.

c. The fine aggregate portion of the blended aggregate shall have a uncompacted void content (fine aggregate angularity) greater than 45.0 percent when tested in accordance with ASTM T304 Method A.

d. Clay lumps and friable particles shall not exceed 0.3 percent by weight when tested in accordance with ASTM C142.

Mineral filler (defined as material passing the No. 200 sieve (0.075 mm)) shall consist of a non-plastic material meeting the requirements of ASTM D242.

Provide a combined aggregate gradation that conforms to the design master range specified in Table 1, when tested in accordance with ASTM C136 and ASTM C117. The gradation shall be uniform from coarse to fine and not vary from the low limit on one sieve to the high limit on the adjacent sieve or vice versa.

Reclaimed asphalt pavement (RAP) shall not be allowed for the project.

Table 1. Combined Aggregate Gradation Master Range

ASPHALT BINDER

Asphalt binder shall conform to AASHTO M320 Performance Grade (PG) 67-22. The Government Engineer may sample and test the binder at the mix production plant at any time before or during mix production.

MIX DESIGN

The mixture proportions shall be designed using a Superpave gyratory compactor set at 75 gyrations. The mixture properties shall meet the criteria shown in Table 2. The proposed mix design shall be submitted to the Government Engineer at least 14 days prior to construction of the test section. No mixture shall be placed prior to Government approval.

Table 2. Superpave Gyratory Compaction Criteria

DOUBLE-BITUMINOUS SURFACE TREATMENT

The Contractor shall provide a double-bituminous surface treatment (DBST), complete and in place, meeting the following requirements:

AGGREGATE:

Cover aggregate for the first course shall consist of a Size 5, 6 or 56 crushed limestone aggregate and shall be spread at a rate of approximately 0.50 – 0.54 ft3/yd2. Cover aggregate for the second course shall consist of a Size 7, 8, or 89 crushed limestone aggregate and shall be spread at a rate of approximately 0.25 – 0.31 ft3/yd2.

BITUMINOUS MATERIAL:

Bituminous materials shall consist of a cationic rapid setting (CRS) emulsion meeting the applicable requirements of AASHTO M208. The CRS emulsion shall be applied at a rate of approximately 0.4 gal/yd2 for both the first and second course.

HIGH PERFORMANCE SURFACE TREATMENT (Gripflex) Materials used for a high performance surface treatment shall meet the requirements of Federal Aviation Administration Advisory Circular AC 150-5370-10H Section 629. Specifically, the materials shall meet the applicable requirements of “Microsurface Type A”.

CREATION

The Contractor shall provide the necessary equipment to spread, finish and compact the various surfacing materials. Production and placement equipment shall be in good working order and meet the applicable requirements of Section 401 of the latest edition of the Mississippi Department of Transportation Standard Specifications for Road and Bridge Construction or Section 629 of FAA AC 150-5370-10H.

Overall physical dimensions for the pavement model are 15-ft.-wide by 285-ft.-long and is located outdoors on the ERDC, Vicksburg campus (see Figure 1 and Figure 2). The surfacing materials will be placed on top of a cement stabilized surface (prepared by ERDC). The HMA portion, i.e., north buffer zone, Item 7, Item 6, and Item 5, shall be placed in a single 15-ft-wide paving lane with no crown or cross-slope. Final compacted minimum HMA thickness shall be as shown in Figure 3.

At least 7 days prior to surface placement, the Contractor shall submit, in writing, a paving plan to provide proposed placement sequencing.

Figure 1. Overall aerial of paving site (red oval)

Figure 2. Close-up aerial of paving site (red oval).

FIGURE 3. Plan view of test section layout.

It is the intent of these specifications that the final compacted HMA thickness be no less than that shown in Figure 3. Surface elevations of the final compacted HMA will be measured by ERDC using rod and level measurement techniques along the centerline of each completed lane at approximately 12 in. intervals. If it is found that the HMA thickness is less than that shown in Figure 3, the test item shall be removed and replaced at no cost to the Government.

If it is found that HMA thickness exceeds those shown in Figure 3 by 0.25 in., the section shall be diamond ground.

It is highly recommended that the Contractor exceed the thickness requirements presented in Figure 3.

Mat density shall be 92 to 96 percent of theoretical maximum density and will be measured based on the average of three cores randomly obtained by ERDC from each HMA thickness section. If test results fail to meet the required density, the test section shall be removed and replaced at no cost to the Government.

A tack coat shall be used to bond the asphalt layers, where applicable. Tack coat shall be a cationic slow set emulsion (CSS-1) applied at a rate of 0.03 gal/sy. Other products and/or application rates must be approved by the Government Engineer.

Care should be taken to protect the various pavement surfacing at all times during this contract and a placement plan should be developed to limit construction traffic on previously placed surfaces.

DIAMOND GRINDING

Areas exceeding the design thickness by 0.25 in. shall be diamond ground. The grinding equipment shall be a power driven, self-propelled machine that is specifically designed to smooth and texture pavement surfaces with diamond blades. The effective wheel base of the machine shall not be less than 12.0 ft. It shall have a set of pivoting tandem bogey wheels at the front of the machine and the rear wheels shall be arranged to travel in the track of the fresh cut pavement. The center of the grinding head shall be no further than 3.0 ft. forward from the center of the back wheels. The equipment shall be of a size that will cut or plane at least 2.0-ft.-wide. The equipment shall be capable of grinding the surface without causing spalls.

Where grinding is required, it will be performed across the entire 15 ft. lane width.

The grinding operation shall proceed in a manner that produces a uniform finish surface. The Contractor shall establish positive means for removal of grinding residue. Grinding water and residue shall not be permitted to flow across adjacent test areas. The Contractor shall have sufficient collector and/or discharge hose to ensure a majority of grinding residue is discharged outside the test area.

The grinding process shall produce a pavement surface that is smooth and uniform in appearance with a longitudinal line type texture. The line type texture shall contain parallel longitudinal corrugations that present a narrow ridge corduroy type appearance. The peaks of the ridges shall not be more than 1/16 in. higher than the bottoms of the grooves.

The use of an asphalt milling machine as an alternative to diamond grinding equipment shall not be permitted.

Delivery Required Start Date: To be coordinated with Project Engineer Required Completion Date: One month after first day on government site Total Project Time: One month after first day on government site

Security Requirements

General security requirements and guidance- The security requirements described below apply to all contract personnel (including employees of the prime Contractor (“Contractor”) and all subcontractor employees) supporting the performance requirements of this contract. The Contractor is responsible for compliance with these security requirements. Questions regarding security matters shall be addressed to the designated Government representative (e.g., Contracting Officer Representative (COR), Requiring Activity (RA) representative, or Contracting Officer (if a COR or other RA representative is not appointed)). Contract personnel are critical to the overall security and safety of US Army Corps of Engineers (USACE) installations, facilities and activities, and security awareness training contributes to those efforts. The Department of Defense (DoD) and Army security training requirements specified below, if applicable, are performance requirements; all applicable contract personnel shall complete initial training within 30 days of contract award or the date new contract personnel begin performance on the contract. Within five business days from the completion of training, the Contractor shall provide written documentation (e.g., email or memorandum) to the Government representative. The documentation shall include the names of contract personnel trained and which training they completed; the Contractor shall maintain training records as part of their contract files and be prepared to provide copies of training certificates to the Government representative. Contractor personnel and vehicles are subject to search when entering federal installations. Additionally, all contract personnel shall comply with Force Protection Condition (FPCON) measures, Random Antiterrorism Measures (commonly referred to as “RAMs”), and Health Protection Condition (HPCON) measures. The Contractor is responsible for meeting performance requirements during elevated FPCON and/or HPCON levels in accordance with applicable RA plans and procedures --this includes identifying mission essential and non-mission essential personnel. In addition to the changes otherwise authorized by the changes clause of this contract, should the FPCON or HPCON levels at any individual facility or installation change, the Government may implement security changes that affect contract personnel. The Contractor shall ensure all contract personnel are aware of their security responsibilities, including any site-specific requirements identified in local policies or procedures.

Antiterrorism (AT) Level I training: All contract personnel requiring routine access to Army installations, facilities, and controlled access areas, or requiring network access shall complete initial and annual refresher AT Level I awareness training. Online AT Level I awareness training is available at https://jko.jten.mil/ (website subject to change).

Physical security and access control requirements: All contract personnel requiring physical access to a federal installation or facility shall comply with the access control procedures of that location. Contract personnel requiring unescorted access to meet contract performance requirements on a DoD installation in the US shall be vetted by the installation/facility Provost Marshal/Directorate of Emergency Services/Security Office using the National Crime Information Center-Interstate Identification Index (commonly referred to as “NCIC-III”) and Terrorist Screening Database (commonly referred to as “TSDB”). Contract personnel shall comply with all personal identity verification requirements specified in installation/facility policies and procedures. Contract personnel who do not meet requirements for unescorted access to USACE facilities shall coordinate escorted access with the Government representative, as needed. Contract personnel who receive keys, access cards, or lock combinations that provide access to government-owned property shall comply with key and lock control procedures of the RA.

Contract personnel requiring a common access card (CAC): Contract personnel will be issued a common access card (CAC) only if duties involve one of the following: (1) both physical access to a DoD facility and access to DoD information systems or networks; (2) remote access to a DoD information system or network using DoD-approved remote access procedures; or (3) physical access to multiple DoD facilities or multiple non-DoD federally controlled facilities on behalf of the DoD on a recurring basis for a period of 6 months or more. Before CAC issuance, contract personnel must have, at a minimum, a favorably adjudicated Tier 1 investigation or an equivalent or higher investigation in accordance with applicable Army regulations and Homeland Security Presidential Directive-12 (HSPD-12). At the discretion of the RA, an initial CAC may be issued based on a favorable review of a fingerprint check and a successfully scheduled Tier 1 investigation with the National Background Investigations Bureau. The RA provides contract personnel with additional information and forms to initiate the CAC issuance process, and/or to initiate background investigations, when required. Contract personnel shall complete these processes within established timelines to avoid delays.

Suspicious Activity Reporting training (e.g. iWATCH, CorpsWatch, or See Something, Say Something): All contract personnel shall receive initial and annual refresher training from the RA representative on the local suspicious activity reporting program. This locally developed training provides contract personnel with general information on suspicious behavior, and guidance on reporting suspicious activity to the project manager, security representative or law enforcement entity.

Contract personnel requiring access to Government information systems: All contract personnel with access to a government information system (including USACE business systems and CAC-enabled websites) shall comply with applicable DoD and Army regulations, and shall use the organization's UserID-Password Administration and Security System (U-PASS) at commencement of services to request network user accounts. Contract personnel shall complete DoD Information Assurance Awareness training prior to accessing information systems, and annually thereafter.

Contracts requiring a formal OPSEC program: The Contractor shall develop an OPSEC SOP/Plan within 90 days of contract award. The OPSEC SOP/Plan shall be reviewed and accepted by the RA OPSEC Officer. This plan will include a process to identify critical information, where it is located, who is responsible for it, how to protect it, and why it needs to be protected. In accordance with Army and DoD regulations, the contractor shall have a certified Level II OPSEC coordinator, who shall ensure OPSEC compliance during contract performance.

Training requirements for the protection of sensitive information: All contract personnel with access to critical information (as identified in the RA's OPSEC Program) shall complete initial and annual refresher OPSEC Level I Awareness training, which is available at the following websites: https://www.iad.gov/ioss/, or http://www.cdse.edu/catalog/operations-security.html (websites subject to change). All contract personnel with access to Controlled Unclassified Information (CUI) shall complete initial and annual refresher CUI training in accordance with applicable Army policy.

Contracts requiring handling or access to classified information: The prime Contractor shall have a Facility Clearance (FCL) at the appropriate level prior to performance on the contract; the RA will sponsor the prime contract company in obtaining the FCL. All cleared contract personnel shall comply with the FCL requirements, as well as applicable laws and regulations regarding contractor access to national security information. For classified contracts, the RA will generate the DD Form 254, which will be attached to the contract.

Threat Awareness Reporting Program: All contract personnel who maintain an active security clearance shall receive initial and annual refresher training on the Threat Awareness and Reporting Program (commonly referred to as “TARP”), provided by a Counterintelligence Agent. As determined by the servicing Counterintelligence Agent for the RA, contract personnel may complete web-based TARP training.

Safety It is the responsibility of the contractor to ensure worker safety by informing the workers of any potential hazardous practices. Occupational Safety and Health Administration (OSHA) guidelines must be followed at all times for hazardous practices for handling and placing concrete. Workers are required to be informed of all hazardous materials and practices that may involve exposure to toxic materials in the workplace. Material Safety Data Sheets (MSDS) must be available to all workers at the work site.

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