Base_SOW_Concrete_Asphalt_IDIQ_13JUN18.docx

Regional Contracting Center-afghanistan Base Pavements IDIQ Statement of Work

AFGHANISTAN

USFOR-A

6/8/2016

The document outlines the specifications and requirements, as directed by the Government, necessary to provide suitable complete and usable material and construction services.

Contents

SECTION 1: IDIQ SOW OVERVIEW

OBJECTIVE

1. The primary purpose of this Multiple Award (MA) Indefinite Delivery / Indefinite-Quantity (ID/IQ) contract (Otherwise known as a Multiple Award Task Order Contract (MATOC)) is to obtain bulk concrete, asphalt, and aggregate delivery and associated construction services and materials for USFOR-A Garrison and other US tenant units deployed to Afghanistan Area of Responsibility (AOR). This type of contract is intended for use of funded programs and projects managed by USFOR-A Garrison, and other US tenant units in Afghanistan. This Statement of Work (SOW) provides the general requirements. Individual Task orders (TO) will be issued based on the needs which will be specified in the SOW that’s issued with each task order. The Contractor shall be responsible to provide all labor, services, materials, tools, equipment, mobile batch plant, machinery, supplies, transportation, delivery, storage, expertise, supervision, management, engineering, quality control, testing, communication, security, safety, and all other items and services as necessary to complete the work specified in each awarded TO.

LOCATION

2. Project sites and deliveries of material will be throughout Afghanistan.

SCOPE INFORMATION

3. This contract will include a wide variety of construction activities. A number of these types of activities are listed in the paragraphs below; however, this list is not intended to be exhaustive or all-inclusive. Instead, the list should be considered as an example of the types of activities that might be required. Each project will be awarded by a TO with the details of the particular project specified in the TO Statement of Work (SOW). All materials shall be new unless otherwise approved by the COR, free of defects and in good condition. All materials shall conform to the Specification and Plans outlined in the SOW, unless otherwise approved by the COR. The Contractor shall remove defective materials from the site at no additional cost to the Government.

4. The Contractor is responsible for inspecting all work areas and determining actual work area conditions and construction work requirements. Existing conditions shall not be the basis for any modifications to the contract. The contractor and COR together, will field verify all measurements before commencing with work.

BATCH PLANT OPERATIONS

5. Upon request, the Offerors shall have the ability to provide a mobile or static concrete and/or asphalt batch plants. The Government will provide a suitable location to conduct batch plant operations.

CONCRETE

5.1. The Contractor shall provide all labor and materials to support construction, maintenance and repair of concrete pavement and flatwork; including all formwork, steel rebar reinforcement, base course, other aggregates, mortar, and grout. These materials may also be used to construct, maintain, and repair the Airfield(s), roadways, parking lots, flatwork, and other miscellaneous concrete projects.

ASPHALT

5.2. The Contractor shall provide all labor and materials to support construction, maintenance and repair of hot-mix asphalt pavement; including base course and other aggregates. These materials may also be used to construct, maintain, and repair the Airfield, roadways, parking lots, and other miscellaneous asphalt paving projects.

BULK GRAVEL

5.3. The Contractor shall provide all labor and materials to support construction and maintenance of gravel yards; including material handling equipment necessary for bulk delivery of crushed gravel, graded-crushed aggregate base course, ballast, riprap, pea gravel, and other aggregates to location specified in each task order.

T-WALLS

5.4. The contractor will provide Force protection T-Walls In Accordance With (IAW) the specifications provided and delivered to a location as directed by the Government. The construction of these T-Walls will take place at the location specified by the Government.

JERSEY BARRIERS

5.5. The contractor will provide Jersey Barriers IAW the specifications provided and delivered to a location as directed by the Government. The construction of these Jersey Barriers will take place at the location specified by the Government.

U-BARRIERS

5.6. The contractor will provide U-barriers (Bunkers) IAW the specifications provided and delivered to a location as directed by the Government. The construction of these U-barriers will take place at the location specified by the Government.

FILL DIRT

5.7. The contractor shall possess the capability and equipment required to provide and deliver fill dirt (of various types) as required.

GEOTEXTILE-LINED WELDED MESH BARRIERS

5.8. The contractor will provide geotextile-lined welded mesh barriers as required by the Government. The contractor shall have the ability to construct these barriers. The Government shall provide the specifications and the locations at the TO level.

SAND

5.9. The contractor shall possess the capability and equipment required to provide and deliver sand (of various types) available in the local area.

OTHER MATERIAL

5.10. Check Attachment 1 (Price Schedule) for a list of required materials. Material prices shall be fixed at the onset of this MATOC and shall be included in Attachment 1.

DURATION

6. This contract will allow for one (1) base year, two (2) 12-month optional ordering periods, and will include a six (6) month extension under FAR Clause 52.217-8.

GOVERNMENT FURNISHED MATERIALS

7. It is not expected that any Government-Furnished Materials (GFM) will be provided during the execution of any task orders performed under this contract. If, however, GFM is provided, the GFM items will be clearly identified at the TO level.

7.1. The Government will provide a location to the contractor for disposal of waste water from the concrete production. If required, the Contractor shall transport this waste to the Government specified location.

7.2. The Government will provide an area for storage of contractor tools, equipment, machinery, and mobile office; however, the contractor will be responsible for the security of these items. The contractor shall provide its own office trailer, if the contractor deems it necessary.

7.3. The Government will provide the required water necessary for completion of any Task Orders performed under this contract.

7.4. If there is electricity present at the on-base work location, the Government may allow the contractor to connect or utilize the existing electricity. At no point will the Government provide generators for the electricity necessary to complete the required TO. This will be the responsibility of the contractor.

7.5. The Government will provide and service portable toilets at the batch plant site.

7.6. The Government will provide a suitable location to conduct batch plant operations (Concrete and Asphalt).

7.7. The government may provide billeting for contractor employees. This will be decided per individual task order. The Government Furnished Contractor Support (5152.225-5908) will provide a complete list of contractor support for each task order.

7.8. The Government shall provide fuel to the contractor The Government shall provide fuel to the contractor for its equipment located inside the compound which is required to execute the work.

7.9. Once a TO is issued, the contractor shall provide the COR a list of equipment that will require Government furnished fuel.

PROJECT DOCUMENTATION

8. Project documents will be provided with each task order issued under this contract. Examples of such documents may include, but are not limited to, formal design drawings, sketches, site-specific specifications, guide specifications, design analysis, and other documents appropriate to the project and program specific task orders. The intent is to provide sufficient project-specific information to allow for a complete understanding of the project. Each task order will include a SOW and bid schedule, and if applicable, will reference ACI 318, ACI 306R-10, ASTM standards, and Unified Facilities Guide Specifications (UFGS), which may be found on the internet at http://www.wbdg.org/ccb/browse_org.php?o=70. At the time of the preparation of proposals for the task order, the most recent version of the applicable UFGS will apply.

SUBMITTALS

9. Submittals will be outlined in each TO SOW.

PROJECT PERSONNEL

10. The contractor shall specify a person who is responsible for each TO, this person may be responsible for numerous TO’s. The contractor shall provide a person on each site who is responsible for the successful execution of each TO. The Contractor shall maintain supervision of employees throughout the project.

11. Contractor personnel shall comply with USFOR-A Contractor Escort and all security policies. Violations of these policies may result in termination of the contract. Compliance with security requirements shall not be the basis for failing to complete work in the required time period. Confine operations to areas within the contract limits indicated. Contractor personnel found outside of the prescribed work area or otherwise in violation of any security requirements will be detained and removed from the base. Contractor shall provide a list of all personnel that will be involved on each Task Order. The list must include the first and last name and Tazkara numbers of all Afghan citizens. Also list the badge number and expiration date of all employees with a red or yellow BAF Access badge. For non-Afghan citizens, list their first and last name, country of origin and passport number. All Contractor personnel shall be badged with the appropriate Access Badge prior to award of task order. Contractor must show they can support a “Resolute Support Mission Afghanistan” (RSMA) which is comprised of workers coming from the following countries: Italy, Germany, Georgia, Turkey, Romania, United Kingdom, Czech Republic, Poland, Armenia, Mongolia, Netherlands, Denmark, Croatia, Azerbaijan, Bulgaria, Hungary, Albania, Belgium, Bosnia-Herzegovina, Norway, Macedonia, Slovakia, Finland, Sweden, Latvia, Lithuania, Spain, Montenegro, Austria, New Zealand, Portugal, Ukraine, Slovenia, Estonia, Greece, Iceland, Luxemburg.

12. Task orders will specify the type of workers allowed on each installation. Individual task orders will either require Other Country Nationals (OCN), Local Nationals (LN) or a combination of both. The offeror shall comply with contractor workers for each individual task order. TOs will specify any requirements of contractor workers that need to be escorted. The Government will provide the escorts if required.

13. The contractor shall provide transportation to and from the job site for contract employees. The contractor shall leave enough vehicles on the installation to provide the transportation to avoid delays. Prior coordination with the COR is required in order to make arrangements for vehicles to remain on the installation. Transportation may vary per TO. Some TOs will allow contractor employees to stay on base, while other TOs will not.

WORKMANSHIP AND WARRANTY

14. The Contractor shall conduct all work in a professional manner, in accordance with United States recognized construction practices and techniques described in this document. All work shall have a one year warranty period valid from date of project acceptance.

ENVIRONMENTAL

15. All waste oil and fuel spills will be cleaned up immediately and disposed of properly. Hazardous materials well be appropriately disposed off in accordance with the local applicable

EQUIPMENT

16. The Contractor shall ensure that all equipment supplied and installed are in an operable condition through the completion of this project. Contractor shall provide all oil, spare parts, tools and labor for all Task Orders. Any broken or damaged equipment will be fixed immediately or replaced. The contractor shall provide all necessary equipment needed to complete each TO.

17. Contractor’s delivery vehicles shall maintain a functional level of maintenance and safety as per chapter 18 in the EM 385-1-1. The Contractor shall ensure only functional vehicles are used for delivery. Contractor’s vehicles used for the hauling of asphalt and aggregate shall have the capacity to hold at least 15 cubic meters of material at all times. Concrete trucks shall be minimum of 9 cubic meters

18. Contractors shall ensure that vehicle drivers obey all traffic laws.

19. Equipment: Dependable and sufficient equipment that is appropriate and adequate to accomplish the work specified shall be assembled at the site of the work in a sufficient time before the start of paving to permit thorough inspection, calibration of any weighing and measuring devices, adjustment of parts, and the making of any repairs that maybe required. The Contractor will maintain up-to-date records of all calibrations and inspections and devices will be calibrated in accordance with manufacture specifications. The equipment shall be maintained in good working conditions and free of oil and hydraulic fluid leaks.

20. Batch-type equipment shall be used for producing concrete. Mixing equipment shall be capable of combining the aggregate, cement, admixture, and water into a uniform mixture and discharging this mixture without segregation. Ready-mixed concrete shall be batched, mixed, and transported in accordance with ASTM C94/C94M, except as otherwise specified.

21. The Contractor shall provide transportation of materials and all personnel, material handling equipment, personal protective equipment, as necessary to complete the Work.

MEASUREMENT

22. The Contractor shall coordinate acceptable standards of measurement of materials with the COR prior to beginning work.

QUALITY CONTROL PLAN

23. The contractor shall establish a quality control program in accordance with the guidelines of ACI 121R. Provide direct oversight for the concrete qualification program inclusive of associated sampling and testing. Provide all quality control reports to the Quality Manager, Concrete Supplier and the Contracting Officer. Maintain a copy of ACI SP-15 and CRSI 10MSP at the project site.

23.1. Day-to day inspection and testing is the responsibility of the Contractor Quality Control (CQC) staff. However, representatives of the Contracting Officer can and will inspect construction as considered appropriate and will monitor operations of the CQC staff. Government inspection or testing will not relieve any CQC responsibilities.

SAFETY REQUIREMENTS

24. The Contractor shall follow all applicable USACE EM385-1-1 standards; specifically, the Contractor shall ensure that Employees are supplied and use proper safety equipment (e.g., gloves, safety glasses, boots, etc.) and follow proper work procedures, which protect contractor employees and U.S. soldiers in vicinity of job site. The Contractor shall establish a safety zone around the work area and establish a safety system with warning markers and other devices to prevent injuries to pedestrians and others who may be on the site. The Contractor shall assume any liability for any injury incurred by contractor personnel while working on site. If there are areas that have land mines near the construction site, the contractor is responsible to ensure that his personnel obey posted signs and do not wander into mine fields.

WEATHER

25. The ambient air temperature and the pavement temperature within the joint walls shall be a minimum of 40 degrees F but not less than the manufacturer’s recommended minimum temperature and rising at the time of application. Sealant shall not be applied if free moisture is present in the joint.

25.1. Concrete shall not be placed when weather conditions detrimentally affect the quality of the finished product. If ambient temperatures are expected to fall below 40 degrees F (4 degrees C) or rise above 90 degrees F (32 degrees C,) the Contractor must provide a cold/hot weather paving plan for approval prior to proceeding in accordance with ACI 306R-10.

25.2. Per ACI 306R-10 a cold weather concreting plan is required prior to accepting any cold weather concrete task orders.

CLEANUP

26. The Contractor shall perform a jobsite cleanup each day and remove all debris and refuse from the site, to the satisfaction of the COR. Occupied areas shall be kept free of debris at all times. Additionally, at the end of the project, the Contractor shall restore any disturbed areas back to their original condition.

WORK PERIOD

27. The Contractor shall complete all Work within the prescribed period identified in the Task Orders. The contractor will have the option, if requested, to add additional work shifts as required to complete larger or multiple task orders pending approval of the COR and force protection.

27.1. The period of performance will be specified in each TO.

27.2. The contractor may request modifications to the work hours on an individual task order basis for approval by the COR.

FORCE PROTECTION

28. The Government will provide Force Protection escorts for all contractor personnel in DESIGNATED SECURED AREAS ONLY. The Contractor must provide to the Government the number of employees working on a particular site as well as the equipment that will be used.

DIG PERMIT

29. The contractor shall obtain any required permit per individual TOs.

EXPLOSIVE ORDNANCE

30. Project site locations will have been cleared. Contact the COR with questions and/or clarification. Should the contractor encounter mines or unexploded ordinance during the course of the excavation, cease work immediately and call the COR. Ensure you are at least 25 feet away from mines/unexploded ordinance while using a cell phone.

TASK ORDERS

31. Contractor shall provide a detailed Gantt chart with actual dates to meet their intended timeline In Accordance With (IAW) the SOW. Gantt Charts shall be provided to the designated COR and Contract Specialist (KS) within 5 calendar days of Task Order award. The effective date of the DD Form 1155 shall act as the Notice to Proceed unless otherwise stated within the individual Task Order.

ACCEPTANCE

32. The contractor shall coordinate a job completion walk through, acceptance of work and final product and task completion with the COR a minimum of 4 days prior to the end of the period of performance or project completion.

INSTALLATION ACCESS

33. SYSTEM FOR INSTALLATION ACCESS TO MILITARY INSTALLATIONS, BASES, AND PROJECT SITES IN AFGHANISTAN (APR 14)

33.1. U.S. and NATO Commanders have an “inherent authority” to maintain law and order, security, and discipline necessary to protect the inhabitants of military installations. This authority allows commanders to control access and administration to a military installation and to bar contractors (business entities) and any/all contractor employees from a military installation. A commander’s inherent Force Protection (FP) authority is independent of an agency’s contracting authority.

33.2. The vendor acknowledges, by submitting a proposal/offer, that the work requires the prime contractor and all sub-contractors to have access to a U.S. and/or NATO military installation.

33.3. KOs may not award contracts to contractors who require but do not have the ability to access the work site. KOs may terminate contractors when contractors lose the ability to access the work site.

33.4. Contractors must direct subcontractors who have been barred to immediately withdraw from military installations. A prime contractor that fails to take immediate action to remove a barred subcontractor may be terminated for cause or default.

33.5. A U.S. or NATO Commander’s FP installation access determination is completely unrelated to contracting regulations regarding suspension and debarment authority. Contractor queries related to U.S. installation bar actions must be directed to the USFOR- A Provost Marshal. Contractor queries related to NATO installation bar actions must be directed to the ISAF Joint Command Provost Marshal.

33.6. “U.S. Military Installation” means a base, camp, post, station, yard, center, or other activity under the operational control of the Secretary of a military department or the Secretary of Defense, without regard to the duration of operational control.

33.7. “NATO Military Installation” means a base, camp, post, station, yard, center, or other activity under the operational control.

SECTION 2: TECHNICAL REQUIREMENTS FOR BULK MATERIALS

GENERAL REQUIREMENTS

1. Any of the materials supplied IAW this statement of work, shall be made available for bulk delivery to the Government.

2. Bulk delivered items will be delivered per the TO SOW. Contractor shall account for procedural time for base entry procedures for vehicles and personnel.

3. Constituent Elements: Contractor shall coordinate with approved concrete batch plant(s) to demonstrate acceptable characteristics of the Portland Cement Concrete constituent elements proposed for use throughout the life of the contract. If/when Contractor proposes a change to the constituent elements (ie: different Portland cement manufacturer, different aggregate type, different water source, etc.), Contractor shall re-submit to the COR for Government approval. Specifically, Contractor shall submit the following for Government approval per TO:

3.1. Manufacturer’s product data (catalogue cuts and technical data sheets) and full bag of cement with printed label of cement manufacturer of the proposed Portland cement to be incorporated into the barriers.

3.2. Sieve analysis, chemical analysis, source location, delivery logistic information and 10 lb. (4.54 Kg) physical sample of the proposed course aggregate.

3.3. Sieve analysis, chemical analysis, source location, delivery logistic information and 10 lb. (4.54 Kg) physical sample of the proposed fine aggregate.

3.4. Submittal on batch plant’s concrete mix designer’s qualifications.

3.5. Submittal of concrete mix design based on one cubic meter of concrete.

3.6. Estimated concrete sample compressive strength at the end of seven curing days.

DELIVERY

4. Each task order will have delivery specifics. Each delivery must be accompanied by a fluent interpreter. The Government shall only acknowledge actual delivered gravel on the delivery ticket.

4.1. Contractor shall ensure full scheduled amount is delivered as scheduled. Each truckload of material shall be approved by Government personnel to determine actual quantity delivered. If the Contractor is found to have forged delivery tickets, the USG reserves the right to terminate the contract and withhold payment.

4.2. The Contractor shall ensure that prearranged deliveries are accomplished on time and with the requested quantities. The Government reserves the right to withhold payment if the quality of the material delivered is substandard and unacceptable. Any unacceptable material will be disposed of at no additional expense to the USG. The Contractor shall furnish delivery tickets for all deliveries.

4.3. Specific delivery requirements will be provided in each TO.

4.4. If a material must be dumped or offloaded for security reasons, the contractor shall have the ability and equipment readily available to pick it back up (as many times as required) and deliver to the specific location provided by the Government.

5. The Contractor shall be responsible for all material storage, providing any necessary security containers, fencing and protection from the weather. At the end of Project, Contractor shall remove all excess materials and debris from the site. Storage locations shall be as designated by COR.

SAND

6. Gradation requirements for sand are as follows: 95-100% passing 4.76mm (number 4) Sieve, 80-100% passing 2.36mm (number 8) Sieve, 50-85% passing 1.18mm (number 16) Sieve, 25-60% passing 0.6mm (number 30) Sieve, 10-30% passing 0.3mm (number 50) Sieve, 2-10% passing 0.15mm (number 100) Sieve.

GRAVEL

7. All gravel provided under this Contract shall consist of stone that has been quarried from rock formations, crushed and screened to produce a minimum of seven (7) facets per piece. Round and outsized stone is not acceptable and shall be removed from the base at the Contractor’s expense. Contractor is responsible for providing samples before delivery and the USG reserves the right to test materials in order to ensure complete compliance.

SECTION 3: TECHNICAL REQUIREMENTS FOR CONCRETE

GENERAL REQUIREMENTS

1. The contractor shall take concrete cylinder tests at least once daily at the beginning of each day’s concrete casting.

2. Contractor shall provide manufacturer product information for all concrete additives.

3. Contractor shall install concrete as to prevent aggregate segregation, eliminate voids, and develop & preserve ultimate strength.

4. To assure optimum consolidation, Contractor shall vibrate all concrete when placed. However, Contractor shall exercise appropriate controls to ensure that no over- vibration with resultant segregation/lamination occurs. Contractors will not use vibratory equipment to move concrete.

5. Contractor shall “wet” cure the cast barriers in a high-humidity environment for not less than 14 calendar days. Contractor shall provide plan of how curing plan is accomplished per each TO.

6. Contractor shall assure a neat smooth finish with beveled or filleted edging. Contractor SHALL NOT mask honeycombing or other void/fault with mortar coating or secondary casting. Contractor shall vibrate edges and corners adequately to avoid honeycombing.

7. TO’s for Concrete, the Contractor shall submit concrete delivery tickets to the COR at close of business on each date on which concrete is delivered for casting purposes. COR will accept scanned true copies transmitted in .pdf or .jpg file format via electronic mail.

STANDARD SPECIFICATION

8. The contractor is required to acquire and follow all of the specifications below;

9. AMERICAN CONCRETE INSTITITUTE INTERNATIONAL (ACI)

· ACI 117(2010; Errata 2011) Specifications for Tolerances for Concrete Construction and Materials and Commentary

· ACI 121R(2008) Guide for Concrete Construction Quality Systems in Conformance with ISO 9001

· ACI 211.1(1991; R 2009) Standard Practice for Selecting Proportions for Normal, Heavyweight and Mass Concrete

· ACI 214R(2011) Evaluation of Strength Test Results of Concrete

· ACI 301M(2010; ERTA 2015) Metric Specifications for Structural Concrete

· ACI 304.2R(1996; R 2008) Placing Concrete by Pumping Methods

· ACI 304R(2000; R 2009) Guide for Measuring, Mixing, Transporting, and Placing Concrete

· ACI 305.1(2014) Specification for Hot Weather Concreting

· ACI 306.1(1990; R 2002) Standard Specification for Cold Weather Concreting

· ACI 309R(2005) Guide for Consolidation of Concrete

· ACI 306R-10 for Cold Weather Concrete

· ACI347R-14 Guide to Formwork for Concrete

· ACI 318(2014; Errata 1-2 2014; Errata 3 2015) Building Code Requirements for Structural Concrete and Commentary

· ACI 318M(2014) Building Code Requirements for Structural Concrete & Commentary

· ACI SP-15(2011) Field Reference Manual: Standard Specifications for Structural Concrete ACI 301M with Selected ACI References

10. ASTM INTERNATIONAL (ASTM)

· ASTM A775/A775M – Standard Specification for Epoxy-Coated Steel Reinforcing Bars

· ASTM C1017/C1017M(2013) Standard Specification for Chemical Admixtures for Use in Producing Flowing Concrete

· ASTM C1064/C1064M(2011) Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

· ASTM C1077(2015) Standard Practice for Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory Evaluation

· ASTM C1107/C1107M(2014a) Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink)

· ASTM C1260(2014) Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method)

· ASTM C136/C136M(2014) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

· ASTM C143/C143M(2012) Standard Test Method for Slump of Hydraulic-Cement Concrete

· ASTM C150/C150M(2012) Standard Specification for Portland Cement

· ASTM C1567(2013) Standard Test Method for Potential Alkali-Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)

· ASTM C1602/C1602M(2012) Standard Specification for Mixing Water Used in Production of Hydraulic Cement Concrete

· ASTM C172/C172M(2014a) Standard Practice for Sampling Freshly Mixed Concrete

· ASTM C173/C173M(2014) Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

· ASTM C192/C192M(2014) Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory

· ASTM C231/C231M(2014) Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

· ASTM C260/C260M(2010a) Standard Specification for Air-Entraining Admixtures for Concrete

· ASTM C309(2011) Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

· ASTM C31/C31M(2012) Standard Practice for Making and Curing Concrete Test Specimens in the Field

· ASTM C311/C311M(2013) Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland-Cement Concrete

· ASTM C39/C39M(2015a) Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens

· ASTM C42/C42M(2013) Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

· ASTM C618(2012a) Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

· ASTM C78/C78M(2015) Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading)

· ASTM C937(2010) Grout Fluidifier for Preplaced-Aggregate Concrete

· ASTM C94/C94M(2015) Standard Specification for Ready-Mixed Concrete

· ASTM D5759(2012) Characterization of Coal Fly Ash and Clean Coal Combustion Fly Ash for Potential Uses

· ASTM D75/D75M(2014) Standard Practice for Sampling Aggregates

· ASTM E1643(2011) Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders used in Contact with Earth or Granular Fill Under Concrete Slabs

· ASTM E1745(2011) Standard Specification for Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs

· ASTM E96/E96M(2014) Standard Test Methods for Water Vapor Transmission of Materials

· ASTM C33/C33M(2013) Standard Specification for Concrete Aggregates

· ASTM C150/C150M – Standard Specification for Portland Cement

· ASTM C309 – Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

· ASTM C494/C494M(2013) Standard Specification for Chemical Admixtures for Concrete

· ASTM C881/C881M– Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete

· ASTM D1557 – Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lb/ft3 (2,700 kN-m/m3))

· ASTM C1602/C1602M – Standard Specification for Mixing Water Used in the Production of Hydraulic Cement Concrete

· ASTM D1751 – Standard Specification for Preformed Expansion Joint Filler for Concrete Paving and Structural Construction

· ASTM D1752 – Standard Specification for Preformed Sponge Rubber Cork and Recycled PVC

· ASTM E11 – Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves

· ASTM D75/D75M – Standard Practice for Sampling Aggregates

· ASTM C127 – Test Method for Density, Relative Density (Specific Gravity) and Absorption of Coarse Aggregate

· ASTM C128 – Test Method for Density, Relative Density (Specific Gravity) and Absorption of Fine Aggregate

· ASTM C136 – Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

· ASTM D421 – Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants

· ASTM D422 – Test Method for Particle-Size Analysis of Soils

· ASTM D4318 – Test Method for Liquid Limit, Plastic Limit and Plasticity Index of Soils

· Expansion Joint Fillers for Concrete Paving and Structural Construction

· CRD-C300 – Standard Specification for Membrane-Forming Compounds for Curing Concrete

11. CONCRETE REINFORCING STEEL INSTITUTE (CRSI)

· CRSI 10MSP(2009; 28th Ed) Manual of Standard Practice

12. NATIONAL READY MIXED CONCRETE ASSOCIATION (NRMCA)

· NRMCA CPMB 100(2000; R 2006) Concrete Plant Standards

· NRMCA QC 3(2011) Quality Control Manual: Section 3, Plant Certifications Checklist: Certification of Ready Mixed Concrete Production Facilities

· NRMCA TMMB 100(2001; R 2007) Truck Mixer, Agitator and Front Discharge Concrete Carrier Standards

13. U.S. ARMY CORPS OF ENGINEERS (USACE)

· COE CRD-C 104(1980) Method of Calculation of the Fineness Modulus of Aggregate

PREPAPATORY WORK

14. Prior to starting of site clearance and excavation, a complete survey of the construction area will be performed by the Contractor and COR. Permission will be obtained for any disconnection of any services from relevant service authorities and approved by the project COR. Permission and dig permit will be obtained with assistance from the project COR.

15. Contractor shall test fresh mixed Portland Cement Concrete for suitability prior to accepting and incorporating it into the work. At a minimum, Contractor will perform the below-listed tests (14.1 – 14.4) on the first delivery, last delivery, and one intermediate delivery daily during concrete placement. Contractor will also test any delivery for which visual inspection raises a competent person’s suspicion that minimum standards are not satisfied. The COR will reject any delivery that does not pass minimum standards for any applicable test. If a delivery must be rejected, Contractor will test all subsequent deliveries on that date. Contractor shall keep testing and manufacturing records adequate to determine with certainty which barriers or structures contain the concrete described by any given test results.

15.1. Slump Test: 4 inch maximum, as tested by certified competent person at delivery site.

15.2. Air Entrainment Test: 5.0% plus or minus 1.5%, as tested by certified competent person at delivery site.

15.3. Temperature recordings of air and concrete at time of delivery.

15.4. The contractor shall take concrete cylinder tests at least once daily at the beginning of each day’s concrete casting.

SITE CLEARANCE

16. Before commencing any excavation or fill, the area will be cleared of all trees, stumps, roots, bushes, vegetation, debris, materials or other obstructions. Natural ground, topsoil, soft, unsatisfactory material will be removed. All materials arising from site clearance which are surplus or unsuitable for use in works shall be hauled to an approved disposal site as directed by the COR or designated representative.

16.1. For calculation of Excavation quantity purposes, this work assumes the removal of the top 0.3 meter (1 foot) of material. This work will be measured by the square meter (m2). Any unsatisfactory material removed in addition to this, must be inspected and agreed upon by the contractor and COR, prior to removal.

EXCAVATION

16.2. This work will be measured by the cubic meter (m3) based on neat line calculation as determined by the contract drawings.

16.3. The Contractor shall provide all equipment, labor and tools necessary to excavate the required areas. The Contractor shall remove, replace and compact the base to a depth as indicated on the TO drawings. The base will be visually inspected by the COR to ensure that the condition of the material is adequate. All inadequate base, sub base or sub grade materials should be removed until a good, dry and dense material is located. The poor quality material shall be replaced with a good quality well graded base material. Regardless if the base course is removed or not, the base course should always be re-compacted prior to performing the next work item. When excavating in or around marked utility systems, the contractor shall excavate the area through hand excavated means to ensure the integrity of the utility system.

PAVEMENT REMOVAL

16.4. This work will be measured by the cubic meter (m3) of pavement based on the nominal thickness of the pavement to be removed and disposed of by the Contractor.

SUBGRADE PREPARATION

17. Sub-grade Preparation: Site preparation work may include, but is not limited to, the following: scarification, clearing, grubbing, grading, and compaction of existing sub grade material. Any organic or other deleterious material or stones larger than 50.0 mm in diameter shall be removed from the foundation area. Extent of site preparation work shall be sufficient to result in compaction of sub grade to a minimum of 100% of maximum laboratory density (Modified Proctor performed in accordance with ASTM 1557) and to provide a substantially level bearing surface for each individual barrier placed. The surrounding area shall be graded to ensure positive drainage away from the line of emplaced barriers and adjacent structures. The sub-grade will be shaped to line, grade and cross section and compacted in accordance with the specifications. Grading shall be performed with equipment suitable to place the satisfactory soil to line and grade. Compaction shall be by roller compacted when applicable. The compacted lift of material shall be between 3 and 6 inches (75 and 150 mm.) The required degree of compaction is 95% of the max density (modified proctor) for satisfactory material compaction. Continuous tests will be performed accordance to the specification. The sub-grade will be shaped to line, grade and cross section and compacted in accordance with the specifications. Grading shall be performed with equipment suitable to place the satisfactory soil to line and grade. Compaction shall be by roller compactor. The compacted lift of material shall be between 3 and 6 inches (75 and 150 mm.) The required degree of compaction is 95% of the max density (modified proctor) for satisfactory material compaction. Continuous tests will be performed accordance to the specification and to the satisfaction of the project COR.

SUBGRADE AND EMBANKMENT PROTECTION

18. During construction, embankments and excavations shall be kept shaped and drained. Ditches and drains along sub grade shall be maintained to drain effectively at all times. The finished sub grade shall not be disturbed by traffic or other operation and shall be protected and maintained by the Contractor in a satisfactory condition until, sub base, base, or pavement is placed. The storage or stockpiling of materials on the finished sub grade will not be permitted. No sub base, base course, or pavement shall be laid until the sub grade has been checked and approved by the COR, and in no case shall sub base, base, surfacing, or pavement be placed on a muddy, spongy, or frozen sub grade.

SUB-BASE

19. Sub-base shall consist of stone that has been quarried from rock formations. The stone shall be crushed and screened to produce dense-graded crushed aggregate material. Gradation requirements for graded crushed aggregate are as follows: 100% passing 75 mm (3 inch) Sieve, 50% passing 2.0 mm (number 10) Sieve, 15% passing .075 mm (number 200) Sieve. Contractor is responsible for providing samples before delivery and the USG reserves the right to test materials in order to ensure complete compliance.

BASE COURSE

TECHNICAL REQUIREMENTS

20. Base Course shall consist of stone that has been quarried from rock formations. The stone shall be crushed and screened to produce dense-graded crushed aggregate material. Gradation requirements for graded crushed aggregate are as follows: 100% passing 25 mm (1 inch) Sieve, 40-70% passing 12.5 mm (1/2 inch) Sieve, 20-50% passing 4.75 mm (number 4) Sieve, 15-40% passing 2.0 mm (number 10) Sieve, 5-25% passing 0.425 mm (number 40) Sieve and 0-8% passing 0.075 mm (number 200) Sieve. Contractor is responsible for providing samples before delivery and the USG reserves the right to test materials in order to ensure complete compliance.

20.1 Aggregates shall be handled and stored in a manner to avoid breakage, segregation, or contamination by foreign materials. Material storage at the batch plant site will be covered in a manner to prevent moisture and dust from contaminating the material. Material coverage will be approved by the COR.

20.2. Base course measurement will be for compacted in place base course to neat line dimensions as (1) described on the plan or in the task order, or (2) by the area marked by the COR multiplied by the plan thickness.

20.3. Materials delivered to the site shall be inspected for damage, unloaded and stored with a minimum of handling. Materials shall be handled in such a manner as to insure no damage to the joint sealant materials. Storage facilities shall be provided by the contractor near the job site for maintaining materials at temperatures recommended by the manufacturer. Material storage areas are subject to inspection at the request of the COR.

20.4. Base course shall meet the requirements for Graded-Crushed Aggregate Base Course (GCA.) Aggregates shall be durable and sound, free from lumps and balls of clay, organic matter, objectionable coatings and other foreign material. The Sieve analysis test shall be performed in accordance with ASTM C136. The Contractor shall conduct a compaction test, QC LAB optimum moisture content and a Sieve analysis report of the base course/sub base course aggregates prior to delivery of base/sub base course aggregates, in accordance with ASTM D75.

20.5. GCA fine aggregate shall consist of angular particles produced by crushing stone or gravel that meets the requirements for wear and soundness specified for GCA coarse aggregate. Fine aggregate shall be produced by crushing only particles larger than 4.75 mm Sieve in size. The fine aggregate shall contain at least 90 percent by weight of particles having two or more freshly fractured faces in the portion passing the 4.75 mm Sieve and retained on the 2 mm Sieve, and in the portion passing the 2 mm Sieve and retained on the 0.425 mm Sieve.

20.6. The specified gradation requirements shall apply to the completed base course. Table 1 – Gradation of Aggregates (PG 27)

20.7. The values are based on aggregates of uniform specific gravity. If materials from different sources are used for the coarse and fine aggregates, they shall be tested in accordance with ASTM C127 and ASTM C128 to determine their specific gravities. If the specific gravities vary by more than 10 percent, the percentages passing the various Sieves shall be corrected as directed by the COR.

INSTALLATION

21. The base course shall be mixed with suitable equipment until a uniformly graded mixture is obtained with sufficient water added to provide optimum moisture for compaction. Base course shall be placed in lifts that are a minimum 6 inches (150 mm) and shall not exceed 8 inches (200 mm.) When more than one layer is required, each layer shall be shaped, tested, and compacted before the succeeding layer is placed. Water content shall be maintained at optimum. The density of the base course will be determined by testing.

21.1. The surface of the sub base course and base course shall be smooth, leveled, flat, and free from waves, irregularities and ruts of soft yielding spots. The sub base course and base course elevations shall be surveyed by the Contractor before and after the installation of new sub base and base course. A report indicating the surveyed elevations shall be annotated and provided to the COR for review by the Government. The finished surfaces shall not vary by more than 3/8 inch (10 mm) when checked with a 12 ft. straightedge.

21.2. After the base course is complete, the Contractor shall maintain the base course including drainage, rolling, shaping and watering as necessary to maintain the course in proper condition. Maintain sufficient moisture by light sprinkling with water at the surface to prevent dusty conditions. Traffic shall only be allowed on the base course when it cannot be diverted. Any damage caused by traffic shall be repaired by the contractor, at no cost to the Government.

21.3. Before placing concrete, the Contractor shall dampen the soil as necessary to prevent the soil from absorbing water from the concrete or provide appropriate and approved moisture barrier. The Contractor shall also dampen the forms and reinforcing steel. Prior to placing the concrete, the Contractor shall ensure there is no standing water. The Contractor shall not place concrete until all standing water has been removed.

CONCRETE

22. Mix Design: For Concrete TO’s the Contractor shall submit concrete mix design and the concrete mixtures shall be designed to produce concrete having a compressive strength of as required per other sections. The concrete mixture shall be designed to secure air content by volume of 5 percent, plus or minus 1-1/2 percent, based on measurements made by contractor, or by the USG, on concrete immediately after site delivery.

22.1. Mix Proportions: The concrete proposed for use shall not have a cementitious material (cement plus fly ash as applicable) content of less than 280 kg per cubic meter (472 pound/cubic yard.) The ratio of water to cementitious material, including free surface moisture on the aggregates but not including moisture absorbed by the aggregates shall not be more than 0.45 by weight. The proportions of materials entering into the concrete mixtures shall be in accordance with the approved job-mix formula. The proportions shall be changed whenever necessary to maintain the workability, strength, and standard of quality required, and to meet the varying conditions encountered during the construction. However, no changes will be made without prior approval.

22.2. Workability: The slump of the concrete shall be maintained at the lowest practicable value.

22.3. Delivery of Batched Concrete: Batch mixed concrete shall delivered to the site within 60 minutes and be discharged within 90 minutes or before the mixer drum has revolved 300 revolutions, whichever comes first after the introduction of the mixing water to the cement and aggregates. When the concrete temperature exceeds 30 degrees C, the delivery time shall be reduced to 45 minutes and discharge time to 60 minutes. Concrete shall be conveyed from mixer to repair area as rapidly as practical by methods that will prevent segregation or loss of ingredients. Placing will not be permitted when the sun, heat, wind, or limitations of facilities furnished by the Contractor prevent proper consolidation, finishing and curing.

22.4. Concrete Temperature: The temperature of the concrete as delivered shall not exceed 32 degrees C. When the ambient temperature during placing is 5 degrees C or less, or is expected to be at any time within 6 hours after placing, the temperature of the concrete as delivered shall be between 12 and 25 degrees C.

CEMENT

23. Cement may be furnished in bulk or in the cement manufacturer’s bags and shall be stored in a manner to prevent absorption of moisture. Stack all cement on pallets, or equal, with 6” (150mm) air space under the stack anywhere capillary moisture (indoors or out) may reach the stored cement. Cement protected from weather by canvas or plastic sheets shall have 24” (610mm) free air space around the sides and top of the stack.

23.1. Aggregates shall be handled and stored in a manner to avoid particle segregation, or contamination by foreign materials.

23.2. Cement: The Contractor shall ensure data which identifies the brand and type of the cement to be used and the engineering characteristics of the proposed cement with specific mix design. For typical pavement, the Contractor shall use Type I, Type IA, Type III, or Type IIIA Portland Cement. When rapid opening of the construction area is required, the SOW may direct the Contractor to use Type III or IIIA (high early strength) Portland cement. All cement shall be in accordance with ASTM C150.

COARSE AGGREGATE

24. Size and Grading: Coarse aggregate shall conform to ASTM C33, Size Number 5 (1⅟₂”-) or Size Number 57 (1⅟₂”-).

24.1. Composition: Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, or a combination thereof.

24.2. Quality: Aggregate as delivered to the mixers shall consist of clean, hard, un-weathered, and uncoated particles. Dust and other coatings shall be removed from all coarse aggregates by adequate washing. Particles shall not be thin and flat or sliver-like in shape.

FINE AGGREGATE

25. Composition: Fine aggregate shall consist of natural sand and manufactured sand. Aggregates shall consist of clean, hard, durable particles meeting the requirements of ASTM C33. Particle shape shall not be thin and flat or sliver-like.

25.1. Grading: Fine aggregate shall conform to…