W911S716B0025_SOW_Final.pdf

PART IV SPECIFICATIONS

INDEX

SECTION NO. DESCRIPTION

DIVISION 1 - GENERAL REQUIREMENTS

01010 Summary of Work

01300 Submittals

DIVISION 2 – SITEWORK

02720 Subbase Aggregate Course

02722 Graded Crushed Aggregate Base Course for Flexible Pavement

02731 Aggregate Surface Course

02935 Turf

DIVISION 3

03011 Lime Modified Subgrade

03100 Structural Concrete Formwork

03200 Concrete Reinforcement

03300 Cast-In-Place Concrete

03400 Hot Mix Asphalt (HMA) for Roads

03480 Pavement Marking Material

DIVISION 4-10 – NOT USED

DIVISION 11

11800 Traffic Signals

Intersection Improvements at Pulaski and Missouri

W0RK ORDER # M.0045445

DRAWING # 7899.10

SECTION 01010

SUMMARY OF WORK

1 DESCRIPTION OF WORK:

1.1 Work to be Done: The work consists of furnishing all plant, labor, equipment, supplies, and materials, and performing all work in accordance with these specifications and drawings as indicated at Fort Leonard Wood, Missouri.

1.2 Location: The site of the proposed work is in the Cantonment Area of the Fort Leonard Wood Military

Reservation, Fort Leonard Wood, Missouri.

2 PRINCIPAL FEATURES: The work to be performed will include, but not be limited to, the following principal features:

2.1 Removal and replacement of existing islands according to specifications and drawings.

2.2 Restriping of road and intersection according to specifications and drawings.

2.3 New signal addition to the intersection.

2.3 Contractor will perform work only between 1800-0600 hours.

3 SEQUENCE OF WORK: The area concerned in this project is Government owned and will be in use during the course of this project.

4 SCHEDULING:

4.1 The Contractor shall schedule all activity at the job site through the DPW Contract Inspection Branch a minimum of 24 hours in advance of work.

4.2 Contractor shall schedule his working hours to coincide with the working hours of the military reservation.

Normal working hours of the reservation are 7:30 a.m. to 4:00 p.m., Monday thru Friday, legal public holidays accepted.

The Contractor shall not perform work on the reservations beyond the aforementioned working hours without the written approval of the Contracting Officer.

4.3 If the Contractor, for his convenience, desires to perform work during other than normal working hours or on other than normal workdays, he shall notify the Contracting Officer and the Directorate of Public Works Inspection Branch at least 72 hours in advance. The Contractor shall not perform work beyond the normal working hours or normal workdays without written approval of the Contracting Officer and the DPW Inspection Branch approval. The Contractor shall reimburse the Government for any additional expense occasioned the Government thereby, such as, but not limited to, overtime pay for Government inspectors, utilities service, etc.

4.4 Time extensions due to adverse weather or material lead time, must be received in writing prior to scheduled completion date.

5 UTILITY INTERRUPTIONS: Coordinate with the Contracting Officer, DPW Contract Inspection Branch, and the user for any utility work that interrupts service to the facility, any area outside the facility, or any real property facility. Establish a schedule of interruptions listing starting and ending times of disconnection 48 hours prior to interruption.

6 FIELD MEASUREMENTS: The Contractor shall verify all measurements at the project site and shall be responsible for all dimensions, fittings, and the proper installation of all materials and equipment specified.

7 PERMITS: The Contractor shall be responsible for obtaining permits for each worksite.

7.1 Digging: A digging permit is required prior to ANY earthwork operations. The DPW Contract Inspection

Branch will assist the Contractor in obtaining this free permit.

7. 2 Land Disturbance: A land disturbance permit is required for any projects that disturb one (1) acre or more.

Land disturbance is defined as any activity that disturbs the roots of vegetation such as clearing, grubbing and grading.

The Contractor shall apply for the permit from the Missouri Department of Natural Resources (MODNR), after the

FLW Environmental Office has approved the permit application. MODNR by law may take up to 180 days to review and issue a permit. Copy of the permit shall be forwarded to the DPW Environmental Office. The Contractor shall not begin land disturbance operations until they have received and complied with the MODNR permit. MODNR charges a fee for the permits.

7.3 Hot Work Permit: The Contractor shall obtain a written “Hot Work Permit” (DA Form 5383-R) prior to commencing all hot work outside an approved shop area. Permits will be issued by the FLW Fire & Emergency

Services at Fire Station #1, Bldg. 580, Phone: (573) 596-0883. The Contractor shall be liable for any fire loss to

Government property attributable to negligence on the part of the Contractor, including failure to comply with fire prevention measures prescribed by terms of this contract. The Inspection Branch will assist the Contractor in obtaining this free permit

7.4 Confined Space Permit: The Contractor shall obtain a written “Confined Space Permit” prior to commencing all confined space activity above and/or below ground. Title 29 CFR 1910.146 OSHA (Confined Space

Entry) and FLW Regulation 385-7 sets forth the definition of confined spaces and establishes responsibility and procedures for protection of personnel that shall be entering, work in, and existing confines space. If a permit is required the Contractor shall contact the FLW Fire Department, Fire Station #1, Assistant Chief of Operations, Bldg. 580, Phone: (573) 596-0883 prior to, and after the permit required entry is conducted. The Contractor shall keep the permit copy within the work area until all workers have been accounted for after completion of the workday. The Inspection Branch will assist the Contractor in obtaining this free permit.

8 SAFETY REQUIRMENTS:

8.1 General Safety: During progress of work, the Contractor shall protect all personnel, whether Government or civilian, from any and all safety hazards caused by the construction operations. The contractor shall follow all Federal, State and local laws in accordance with 29 CFR 1910 (General Industries Standards), and 29 CFR 1926 (Construction

Standards).

8.2 Fire Prevention: The current version of FLW Regulation 420-2 “Post Fire Regulations” is by this reference made a part of this solicitation and resultant contract. The Contractor’s operation shall conform to all applicable portions of this document. All personnel entering on duty as Contractor’s employees shall be instructed in the fire prevention program of the Post and shall be advised of the requirement of the Post Fire Regulations as they pertain to this particular contract.

8.3 Traffic Control: Contractor shall provide all temporary signs and markers as necessary to maintain safety in the worksite. All signs shall conform to the latest edition of the Manual of Uniform Control Devices

(MUTCD) and shall be coordinated with, and approved by, DPW Inspection Branch. Contractor shall ensure road user movement is inhibited as little as practical.

9. SPECIAL REQUIREMENTS:

9.1 Use of Fire Hydrants – The temporary use of fire hydrants as sources of water is not authorized without prior approval by the Fire Department, 596-0886. Fire hydrant connections shall include an approved backflow preventer. Use of backflow preventers must comply with Missouri Department of Natural Resources, Division 60, Public Drinking Water Program, Chapter 11 – Backflow Prevention, Title 10CSR60-11. Government furnished backflow preventers shall be utilized and are available at Bldg. 1601, Water Treatment Plant on a first come basis.

The Contractor shall be required to sign a hand receipt prior to obtaining a backflow preventer. The Contractor shall be accountable to return the checked out backflow preventer equipment undamaged and as soon as possible. The contractor shall furnish and use an approved fire plug wrench to open and close the hydrant. Pipe wrenches shall not be used. When the hydrant is not being used it shall be shut off. When the need for the hydrant is finished, the hydrant shall be shut off, the temporary connection and backflow preventer shall be removed, the fire hydrant caps shall be replaced and the Fire Department shall be notified that the hydrant will no longer be used.

10. SECURITY:

10.1 In unoccupied facilities, the Contractor shall be responsible for the security of the facility; i.e., all exterior doors shall be locked, windows closed and locked, etc.

10.2 The Contractor shall not be on site without prior notification to the DPW Contract Inspection Branch.

10.3 Contractor personnel shall have valid civilian ID’s.

11 APPLICABLE PUBLICATIONS/REFERENCES: The publications referenced herein after shall be the most recent at the time of solicitation, unless otherwise specified at the beginning of each Specification Section under paragraph 1.

APPLICABLE PUBLICATIONS and or REFERENCES.

12 WORKSITE HOUSEKEEPING:

12.1 The Contractor shall remove all trash and disposal material from the worksite before the end of each day, to the extent it is consistent with standard construction practices on Government work sites. The Contractor shall take all possible precautions to maintain the work site, at all times, in a condition that will prevent damage or injury to person or property, Government or otherwise. The above precautions shall include protection from weather conditions. The

Contractor shall be responsible for all damages caused by the negligent acts or omissions of his employees, sub-contractors, or agents during Contract performance.

12.2 Materials to be used within 1 week of delivery and scrap material to be used as work progresses shall not be required to be in screened area. However, all such items shall be placed in an orderly manner (i.e. dirt, rock, etc., in piles and stackable items such as pipe, brick, lumber, etc., stacked off the ground on pallets in an orderly manner).

12.3 Grass and weeds at work/storage site shall be kept at a height of 4”or less. Work site/storage site shall be policed for trash and disposal material a minimum of once per day.

12.4 All trailer and material storage sites shall have an identification board/sign, with company and job name on it, i.e. ABC Construction – ABC building complex. Signs shall meet the following criteria: min 3’ X 3’ max of 4’ X 8’ in size, 3” high legible print, and be approved by DPW Inspection Branch.

13 RESPONSIBLITY FOR DAMAGE

13.1 Damage to Personal Property: The Contractor shall be solely responsible for all damage to Government and occupant personal property caused by the Contractors’ personnel, subcontractors, his agents, or by the performance of his work.

13.2 Damage by Negligence: Damage resulting in gas leaks, electrical outages, loss of heat during cold weather, water leaks, unsecured facilities, weather damage, or oil/hazardous waste spills shall be responded to by the Contractor within 2 hours and repaired within one workday. If the Contractor fails to comply with these requirements, the Government reserves the right to repair the damage and charge the cost to the Contractor. Contractor shall protect all areas through which he will be transporting demolition debris or construction materials. Any damaged turf, sidewalks, roads, vegetation, site amenities, etc., shall be replaced or repaired by the Contractor prior to final Contract closeout.

14 DISPOSAL OF MATERIALS: All materials removed and not reused or designated as salvage material in this project shall become the property of the Contractor, unless otherwise specified, and shall be the Contractor's responsibility for lawful disposal.

14.1 The Contractor may use the Fort Leonard Wood Compost area for the disposal of wood chips, leaves, and grass clippings generated by this project.

14.2 All other wastes generated during Contractor operations shall be disposed of off post by the Contractor at his/her expense.

14.2.1 The disposal of demolition waste is regulated by the Missouri Department of Natural Resources under Chapter 260, Revised Statutes of Missouri and 10 Code of State Regulations Chapter 80-4. Such waste, in types and quantities established by the Department, shall be taken to a demolition landfill or a sanitary landfill off of the Installation for disposal. The Contractor shall provide any information requested by the landfill operator to complete forms required by the Missouri Department of Natural Resources or other Government-required landfill records.

14.2.2 Wastes classified as hazardous wastes under the Resource Conservation and Recovery Act shall be disposed of off the installation, unless otherwise specified in this contract. No hazardous waste shall be disposed of without prior review of the disposal documents, and the approval of the Contracting Officer and the

Directorate of Public Works Environmental Coordinator, or his designated representative. The Contractor shall provide an original copy of the disposal document from the approved EPA or State permitted disposal facility for each shipment of hazardous waste generated in this project to the Contracting Officers Representative.

15 ACCESS AND GENERAL PROTECTION/SECURITY POLICY AND PROCEDURES:

15.1 All Contractor and sub-contractor personnel performing tasks on this SOW shall comply with all applicable installation, facility and area commander installation/facility access and local security policies and procedures which will be provided to the Contractor by a Government representative upon written request to the

Contracting Officer. Contractor shall provide all information required for background checks to meet installation access requirements as performed by the installation Provost Marshal Office, Director of Emergency Services or

Security Office. Requesting Contractor shall submit request for installation pass to the KO at https://vcc1.icmvcc.com/im3500/. There is no charge to the Contractor for this pass. Contractor personnel shall comply with all personal identity verification requirements as directed by DoD, HQDA and/or local policy. In addition to the changes otherwise authorized by the changes clause of the base contract to this task order, should the

Force Protection Condition (FPCON) at any facility or installation change, the Government may require changes in

Contractor security matters or processes.

15.1.1 In the event that the automated system at https://jkodirect.jten.mil is not available (e.g., server problems), Level I AT Awareness Training can be provided by a qualified instructor. However, if the training is not completed online, the Level I AT Awareness Instructor qualification must be coordinated with the Installation

Antiterrorism Officer (or Installation Security equivalent) and the resultant name(s) of approved instructors shall be provided to the KO.

15.2 Antiterrorism (AT) Level I Training: All contractor and sub-contractor employees requiring access to

Army installations, facilities and controlled access areas shall complete AT Level I awareness training available at https://jkodirect.jten.mil.Users need to enroll in "Course #JS-US007-14" to receive credit for the training within 10 calendar days of contract award; or for new employees within 10 working days of beginning performance on this contract. Contractor shall submit certificates of completion for all personnel to the KO within five calendar days of completion of the training. There is no charge to the Contractor for this training. The burden to complete this training is approximately 1-hour per employee.

15.3 iWatch Training: Within 10 calendar days of contract award and within 10 calendar days of new

Contractor employees commencing work on this contract, all Contractor and sub-contractor employees shall review the FLW Directorate of Emergency Services (DES) web link for iWatch training located at http://www.wood.army.mil/LEC/iWatch/iWatch.htm. This locally developed training will inform employees of the types of behavior to watch for and how to report suspicious activity. Suspicious activity shall be reported to the KO.

There is no charge to the Contractor for this review. The burden to complete this training is approximately 20-minutes per employee.

https://jkodirect.jten.mil/ https://jkodirect.jten.mil/

15.4 OPSEC Standard Operating Procedure/Plan (SOP): The KO will ensure the contractor (after selected) is aware of the MSCoE OPSEC Plan and is in compliance with the MSCoE OPSEC Plan during contract performance.

15.5 OPSEC Training: New contractor employees must complete Level I OPSEC training within 30 calendar days of their reporting for duty in accordance with AR 530-1. All contractors shall complete annual

OPSEC Awareness training if the contract duration is longer than 30-days. MSCoE OPSEC Officer will provide training. Coordination of training shall be through Rick Bowser, (573)563-2402. Proof of training, including a detailed listing of attendees, shall be provided to the KO. A nominal fee shall be charged to the Contractor for this training equal to 1-hour of Government time. The burden to complete this training is approximately 1-hour per training evolution. There are no restrictions to number of attendees in a given training evolution.

15.5.1 All costs associated with employee training and review must be included in the CLIN prices bid/offered for the underlying requirement. No other payments are authorized.

15.5.2 Contractor shall reimburse the Government for classroom OPSEC training. The established fee is $30 per face-to-face training session conducted. Contractor personnel may all attend the same training session; however, in the event of new hires, additional session(s) shall be required. The Contractor may include this cost in his submitted offer. No other payment for this expense shall be authorized. Contractor shall submit payment to the US Treasury, Attention: Budget Officer, MSCoE G-8, 1000 MSCoE Loop, Ste 335, Fort

Leonard Wood, MO 65473.

SECTION 01300

SUBMITTALS

1 GENERAL: All items of equipment and/or materials that are defined or described in the contract require submission in accordance with this section. Brochures, samples, certificates of compliance, test reports, as applicable, shall be submitted by the Contractor to the Contracting Officer, and approval given by the Contracting

Officer before any equipment or material is installed under this contract.

1.1 All of the data required shall be submitted at one time. Approval of materials and equipment will be withheld until all of the required information has been submitted and is in the hands of the Contracting Officer. All submissions must be in sufficient detail to adequately determine that the item will meet the requirements of this

Specification.

1.2 Scheduling: A minimum of 7 calendar days will be scheduled for review and approval of material submittals and possible resubmittal of any items subject to approval. For shop drawings submittals, a minimum of 7 calendar days will be allowed for review and approval and possible resubmittal. If submittals are disapproved due to

Contractor negligence, the performance period will be reduced by the number of additional days (after receipt of rejection notice) required for approval. The scheduling shall be coordinated with the approved progress schedule.

2 MATERIAL APPROVAL SUBMITTALS:

2.1 At the minimum the following list of materials will require approval. The Contracting Officer may require submission of additional materials as deemed necessary. The Contractor shall not proceed with any work using materials, which are subject to approval, until materials are approved.

2.1.1 Material Requiring Approval:

02720 Subbase Aggregate Course

02722 Graded Crushed Aggregate Base Course for Flexible Pavement

02731 Aggregate Surface Course

02935 Turf

03011 Lime Modified Subgrade

03100 Structural Concrete Formwork

03200 Concrete Reinforcement

03300 Cast in Place Concrete

03400 Hot Mix Asphalt (HMA) for Roads

03480 Pavement Marking Material

11800 Traffic Signals

NOTE: For specific quantities of materials to be submitted see the individual SECTIONS.

SECTION 02720

SUBBASE AGGREGATE COURSE

PART 1 GENERAL

1.1 REFERENCES

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

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS (AASHTO)

AASHTO T 180 (2010) Standard Method of Test for Moisture-Density Relations of Soils Using a

4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop

AASHTO T 224 (2001; R 2004) Correction for Coarse Particles in the Soil Compaction Test

ASTM INTERNATIONAL (ASTM)

ASTM C 117 (2004) Standard Test Method for Materials Finer than 75-um (No. 200) Sieve in

Mineral Aggregates by Washing

ASTM C 131 (2006) Standard Test Method for Resistance to Degradation of Small-Size

Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

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

ASTM D 1556 (2007) Density and Unit Weight of Soil in Place by the Sand-Cone Method

ASTM D 1557 (2009) Standard Test Methods for Laboratory Compaction Characteristics of

Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)

ASTM D 2167 (2008) Density and Unit Weight of Soil in Place by the Rubber Balloon Method

ASTM D 422 (1963; R 2007) Particle-Size Analysis of Soils

ASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

ASTM D 6938 (2008a) Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)

ASTM D 75/D 75M (2009) Standard Practice for Sampling Aggregates

ASTM E 11 (2009) Wire Cloth and Sieves for Testing Purposes

1.2 DEFINITION

Degree of compaction required is expressed as a percentage of the maximum laboratory dry density obtained by the test procedure presented in ASTM D 1557 abbreviated as a percent of laboratory maximum dry density. One exception is as follows: Since ASTM D 1557 applies only to soils that have 30 percent or less by weight of their particles retained on the 3/4 inch sieve, the degree of compaction for material having more than 30 percent by weight of their particles retained on the 3/4 inch sieve will be expressed as a percentage of the laboratory maximum dry density in accordance with AASHTO T 180 Method D and corrected with AASHTO T 224.

1.3 SUBMITTALS

Submit the following in accordance with Section 01300

SUBMITTALS:

SD-03 Product Data Equipment

Waybills and Delivery Tickets SD-06 Test Reports

Sampling and Testing Field Density Tests

1.4 QUALITY ASSURANCE

Sampling and testing are the responsibility of the Contractor, to be performed by an approved testing laboratory.

Perform tests at the specified frequency. No work requiring testing will be permitted until the testing laboratory has been inspected and approved. Test the materials to establish compliance with the specified requirements.

1.4.1 Sampling

Take samples for laboratory testing in conformance with ASTM D 75/D 75M. When deemed necessary, the sampling will be observed by the Contracting Officer.

1.4.2 Tests

1.4.2.1 Sieve Analysis

Make sieve analysis in conformance with ASTM C 117 and ASTM C 136. Sieves shall conform to ASTM E 11.

1.4.2.2 Liquid Limit and Plasticity Index

Determine liquid limit and plasticity index in accordance with ASTM D 4318.

1.4.2.3 Moisture-Density Determinations

Determine the laboratory maximum dry density and optimum moisture in accordance with AASHTO T 180, Method

D and corrected with AASHTO T 224 as described in 1.2 DEFINITION.

1.5.2.4 Field Density Tests

Measure field density in accordance with ASTM D 1556, ASTM D 2167, or ASTM D 6938. For the method presented in ASTM D 1556, use the base plate. For the method presented in ASTM D 6938, check and adjust the calibration curves, if necessary, using only the sand cone method as described in paragraph Calibration, of the

ASTM publication. Tests performed in accordance with ASTM D 6938 result in a wet unit weight of soil and ASTM

D 6938 will be used to determine the moisture content of the soil. The calibration curves furnished with the moisture gauges shall also be checked along with density calibration checks as described in ASTM D 6938. The calibration checks of both the density and moisture gauges shall be made by the prepared containers of material method, as described in paragraph Calibration, in ASTM D 6938, on each different type of material to be tested at the beginning of a job and at intervals as directed.

a. Submit certified copies of test results for approval not less than 30 days before material is required for the work.

b. Submit calibration curves and related test results prior to using the device or equipment being calibrated.

c. Submit copies of field test results within 24 hours after the tests are performed.

1.4.2.5 Wear Test

Perform wear tests in conformance with ASTM C 131.

1.4.3 Testing Frequency

1.4.3.1 Initial Tests

Perform one of each of the following tests on the proposed material prior to commencing construction to demonstrate that the proposed material meets all specified requirements prior to installation.

a. Sieve Analysis

b. Liquid limit and plasticity index

c. Moisture-density relationship

d. Wear

1.4.3.2 In-Place Tests

Perform one of each of the following tests on samples taken from the placed and compacted subbase course.

Samples shall be taken and tested at the rates indicated.

a. Perform density tests on every lift of material placed and at a frequency of one set of tests for every 500 square yards, or portion thereof, of completed area.

b. Perform sieve analysis including 0.02 mm size material on every lift of material placed and at a frequency of one sieve analysis for every 1000 square yards, or portion thereof, of material placed.

c. Perform liquid limit and plasticity index tests at the same frequency as the sieve analysis.

d. Measure the thickness of each course at intervals providing at least one measurement for each 500 square yards or part thereof. The thickness measurement shall be made by test holes, at least 3 inches in diameter through the course.

1.4.4 Approval of Material

Select the source of materials 30 days prior to the time the material will be required in the work. Tentative approval will be based on initial test results. Final approval of the materials will be based on tests for gradation, liquid limit, and plasticity index performed on samples taken from the completed and compacted course.

1.5 ENVIRONMENTAL REQUIREMENTS

Perform construction when the atmospheric temperature is above 35 degrees F. When the temperature falls below 35 degrees F, protect all completed areas by approved methods against detrimental effects of freezing. Correct completed areas damaged by freezing, rainfall, or other weather conditions to meet specified requirements.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Subbase Course

Provide aggregates consisting of crushed stone or slag, gravel, shell, sand, or other sound, durable, approved materials processed and blended or naturally combined. Provide aggregates which are durable and sound, free from lumps and balls of clay, organic matter, objectionable coatings, and other foreign material. Material retained on the

No. 4 sieve shall have a percentage of wear not to exceed 50 percent after 500 revolutions when tested as specified in ASTM C 131. Aggregate shall be reasonably uniform in density and quality. Slag shall be an air-cooled, blast-furnace product having a dry weight of not less than 65 pcf. The maximum aggregate size shall be the lesser of 2 inches or 1/4 of the layer thickness (e.g. 1 inch for a 4-inch layer). Aggregates shall be within the limits specified as follows:

Maximum Allowable Percentage by Weight Passing Square-Mesh Sieve

Sieve Designation

No. 1………….100

No. 10…………. 50

No. 200 ………….8

Particles having diameters less than 0.0008 inches (0.02 mm) shall not be in excess of 3 percent by weight of the total sample tested as determined in accordance with ASTM D 422. The portion of any blended component and of the completed course passing the No. 40 sieve shall be either non-plastic or shall have a liquid limit not greater than

25 and a plasticity index not greater than 5.

The subbase course should also meet the following filter criteria:

d15 of filter material/ d85 of subgrade material should be less than or equal to 5. For clay subgrades without sand or silt, a d15 filter size of up to 0.4 mm may be used in place of this criteria.

d15 of filter material = particle size diameter at which 15 percent of the filter material is smaller d85 of the subgrade = particle size diameter at which 85 percent of the subgrade soil is smaller

PART 3 EXECUTION

3.1 OPERATION OF AGGREGATE SOURCES

Clearing, stripping and excavating are the responsibility of the Contractor. Operate the aggregate sources to produce the quantity and quality of materials meeting the specified requirements in the specified time limit. Upon completion of work, aggregate sources on Government property shall be conditioned to drain readily, and shall be left in a satisfactory condition. Aggregate sources on private lands shall be conditioned in agreement with local laws and authorities.

3.2 STOCKPILING MATERIAL

Prior to stockpiling of material, clear and level storage sites. Stockpile all materials, including approved material available from excavation and grading, in the manner and at the locations designated. Aggregates shall be stockpiled on the cleared and leveled areas designated by the Contracting Officer to prevent segregation. Materials obtained from different sources shall be stockpiled separately.

3.3 PREPARATION OF UNDERLYING MATERIAL

Prior to constructing the subbase course, clean the underlying course or subgrade of all foreign substances. The surface of the underlying course or subgrade shall meet specified compaction and surface tolerances. Correct ruts, or soft yielding spots, in the underlying courses, subgrade areas having inadequate compaction, and deviations of the surface from the specified requirements, by loosening and removing soft or unsatisfactory material and by adding approved material, reshaping to line and grade, and recompacting to specified density requirements. The finished underlying course shall not be disturbed by traffic or other operations and shall be maintained in a satisfactory condition until the overlying course is placed.

3.4 GRADE CONTROL

The finished and completed course shall conform to the lines, grades, and cross sections shown. The lines, grades, and cross sections shown shall be maintained by means of line and grade stakes placed by the Contractor at the work site.

3.5 MIXING AND PLACING MATERIALS

Mix and place the materials to obtain uniformity of the material at the water content specified. Make such adjustments in mixing or placing procedures or in equipment as may be directed to obtain the true grades, to minimize segregation and degradation, to reduce or accelerate loss or increase of water, and to insure a satisfactory subbase course.

3.6 LAYER THICKNESS

The compacted thickness of the completed course shall be as indicated. When a compacted layer of 6 inches is specified, the material may be placed in a single layer; when a compacted thickness of more than 6 inches is required, no layer shall be thicker than 6 inches nor be thinner than 3 inches when compacted.

3.7 COMPACTION

Compact each layer of the material, as specified, with approved compaction equipment. Maintain water content during the compaction procedure to within plus or minus 2 percent of optimum water content, as determined from laboratory tests. In all places not accessible to the rollers, compact the mixture with hand-operated power tampers.

Compaction of the subbase shall continue until each layer is compacted through the full depth to at least 100 percent of laboratory maximum density. Make such adjustments in compacting or finishing procedures as may be directed to obtain true grades, to minimize segregation and degradation, to reduce or increase water content, and to ensure a satisfactory subbase course. Any materials that are found to be unsatisfactory shall be removed and replaced with satisfactory material or reworked, as directed, to meet the requirements of this specification.

3.8 EDGES

Place approved material along the edges of the subbase course in such quantity as will compact to the thickness of the course being constructed. When the course is being constructed in two or more layers, at least a 1 foot width of the shoulder shall be rolled and compacted simultaneously with the rolling and compacting of each layer of the subbase course, as directed.

3.9 SMOOTHNESS TEST

The surface of the top layer shall show no deviations in excess of 3/8 inch when tested with a 12 foot straightedge.

Take measurements in successive positions parallel to the centerline of the area to be paved. Measurements shall also be taken perpendicular to the centerline at 50 foot intervals. Correct deviations exceeding this amount by removing material and replacing with new material, or by reworking existing material and compacting it to meet these specifications.

3.10 THICKNESS CONTROL

The completed thickness of the course(s) shall be in accordance with the thickness and grade indicated on the drawings. The completed course shall not be more than 1/2 inch deficient in thickness nor more than 1/2 inch above or below the established grade. Where any of these tolerances are exceeded, correct such areas by scarifying, adding new material of proper gradation or removing material, and compacting, as directed. Where the measured thickness is 1/2 inch or more thicker than shown, the course will be considered as conforming with the specified thickness requirements plus 1/2 inch. The average job thickness shall be the average of the job measurements as specified above but within 1/4 inch of the thickness shown.

3.11 MAINTENANCE

Maintain the completed course in a satisfactory condition until accepted.

-- End of Section --

SECTION 02722

GRADED CRUSHED AGGREGATE BASE COURSE FOR FLEXIBLE PAVEMENT

1.1 REFERENCES: The publications listed below form a part of this specification to the extent referenced.

The publications are referred to in the text by the basic designation only.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 117 (2004) Materials Finer than 75-Micrometer (No. 200) Sieve in

Mineral Aggregates by Washing

ASTM C 131 (2006) Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 136 (2006; Rev. A) Sieve Analysis of Fine and Coarse Aggregates

ASTM D 75 (2009) Sampling Aggregates

ASTM D 1556 (2009) Density and Unit Weight of Soil in Place by the Sand-Cone

Method

ASTM D 1557 (2009) Laboratory Compaction Characteristics of Soil Using

Modified Effort (56,000 ft-lbf/ft (2,700 kN-m/m))

ASTM D 1883 (2007) CBR (California Bearing Ratio) of Laboratory-Compacted

Soils

ASTM D 2922 (2005) Density of Soil and Soil-Aggregate in Place by Nuclear

Methods (Shallow Depth)

ASTM D 3017 (2005) Water Content of Soil and Rock in Place by Nuclear

Methods (Shallow Depth)

ASTM D 4318 (2010) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

1.2 SUBMITTALS: Submit the following in accordance with Section 01300, "Submittals."

Test Reports

Gradation

Bearing ratio

Liquid limit

Plasticity index

Percentage of wear

Density

Gradation

Density

1.3 DELIVERY AND STORAGE: Inspect materials delivered to site for damage and store as to prevent segregation and contamination.

1.4 WEATHER LIMITATIONS: Do not construct base course when atmospheric temperature is below 35 degrees F or when rainfall or other weather conditions detrimentally affect the quality of the finished course.

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1.5 CONSTRUCTION EQUIPMENT: Equipment shall be dependable and adequate for the purpose intended.

Maintain equipment in satisfactory and safe operating condition. Subject to approval, special equipment dictated by local conditions may be used.

2.1 MATERIALS:

2.1.1 Aggregates: Consist of durable and sound crushed gravel or crushed stone, free of lumps or balls of clay or other objectionable matter. Crushed stone and gravel shall be free from flat, elongated, soft, or disintegrated pieces. Crushed gravel retained on a No. 4 sieve shall have at least 90 percent by weight with at least two fractured faces and 100 percent by weight with at least one fractured face. Base course materials samples shall have a bearing ratio of at least 100 as determined by laboratory tests on a 4-day soaked specimen in accordance with ASTM D

1883; compact specimen in accordance with ASTM D 1557, Method D. Determine grain size in accordance with

ASTM C 136 and amount of material finer than 200 mesh sieve in accordance with ASTM C 117. Aggregate, other than slag, shall have a percentage of wear not exceeding 40 when tested in accordance with ASTM C 131, Grading

A. Soil binder material, that portion of material passing the No. 40 sieve, shall be of such composition that the composite material conforms to the requirements specified herein. The base course shall be of such nature that it can be compacted readily with watering and rolling to a firm, stable base and shall conform to the following:

.1

Percentage by Weight PassingSquare Mesh Laboratory Sieves

Sieves

2 inch 100

1 1/2 inch 70-100

1 inch 45-80

1/2 inch 30-60

No. 4 20-50

No. 10 15-40

No. 40 5-25

No. 200 0-10

That portion of the material passing the No. 40 sieve shall have a liquid limit of not more than 25 and a plasticity index of not more than 5 as determined by ASTM D 4318. Prepare samples in accordance with ASTM D 2217, Procedure A.

3.1 BASE COURSE: Construct the graded aggregate base course on a previously constructed subbase course, as indicated. Provide line and grade stakes for control. Place grade stakes in lanes parallel to the centerline of areas to be paved and space for string lining or other control methods. The base course shall consist of aggregate processed, deposited, spread, and compacted on a prepared surface. The Contractor shall be responsible for protection of completed areas against detrimental effects. Recondition, reshape, and recompact areas damaged by freezing, rainfall, or other weather conditions.

3.2 PLACING: Do not dump mixed materials in piles, but place on prepared subgrade in layers of uniform thickness with a spreader. When a compacted course 6 inches in thickness is required, place material in a single layer. When a compacted course in excess of 6 inches is required, place material in layers of equal thickness. Do not exceed 6 inches or have less than 3 inches in thickness for any compacted layer. Place layers so that when compacted, they will be true to grades or levels required with the least possible surface disturbance. Where the base course is constructed in more than one layer, clean previously constructed layers of loose and foreign matter.

Maintain material water content during the placing period to obtain the compaction specified. Make adjustments in placing procedures or equipment to obtain true grades, to minimize segregation and degradation, to reduce or increase water content, and to insure a satisfactory base course.

3.3 COMPACTING AND FINISHING: Immediately following the placing, spread the finished mixture uniformly in a layer and bring to optimum moisture content. The loose thickness and the surface of the layer shall be such that the specified density and the required thickness shall be obtained after compaction. Compact the layer with steel-faced, vibrating or pneumatic-tired rollers, or other suitable compacting equipment or combinations thereof. Continue compacting until the layer is compacted through the full depth to a field density of at least 100 percent to be measured as a percent of the maximum density at optimum moisture content tested in accordance with

ASTM D 1556 or ASTM D 2922. In areas not accessible to rollers or compactors, compact the mixture with mechanical hand tampers. If the mixture is excessively moistened by rain, aerate by blade graders, or other suitable equipment. Aerate until the moisture content of the material is that needed to obtain the required density. Finish the surface of the layer by a combination of rolling and blading. Final surface shall be smooth and free from waves, irregularities, and ruts or soft yielding spots.

3.4 FINISHING AT EDGES OF BASE COURSE: Place earth or other approved materials along the edges of the base course in such quantity that it will compact to the thickness of the course being constructed. When the course is being constructed in two or more layers, place material to the thickness of each layer. In each operation, allow at least a one foot width of the shoulder to be rolled and compacted simultaneously with the rolling and compacting of each layer.

3.5 FIELD QUALITY CONTROL:

3.5.1 Sampling

3.5.1.1 Aggregates at the Source: Prior to production and delivery of aggregates, take at least one initial sample in accordance with ASTM D 75. Collect each sample by taking three incremental samples at random from the source material to make a composite sample of not less than 50 pounds.

Repeat above sampling when source of material is changed or when unacceptable deficiencies or variations from specified grading of materials are found in testing.

3.5.1.2 During Construction: Take one random sample from each 1000 tons of completed course material, but not less than one random sample per day's run. Take samples in accordance with ASTM D 75.

3.5.2 Testing

3.5.2.1 Aggregates: Test each sample of base course material without delay. Make gradation tests from each sample in accordance with ASTM C 136. Make sieve analysis on material passing the No. 200 sieve in accordance with ASTM C 117.

3.5.2.2 Smoothness Tests: Test with a 10 foot straightedge, applied parallel with and at right angles to the center line of the paved area. Correct deviations in the surface in excess of 1/2 inch by loosening, adding or removing material, reshaping, watering, and compacting. The smoothness requirements specified herein apply only to the top layer when base course is constructed in more than one layer.

3.5.2.3 Field Density Tests: ASTM D 1556, ASTM D 2922 or ASTM D 3017. Take one test for each 500 square yards of each layer of base course.

3.5.2.4 Laboratory Density Tests: In accordance with ASTM D 1557, Method D.

3.5.2.5 Thickness Tests: Measure thickness of base course at intervals such that there will be a depth measurement for at least each 500 square yards of complete base course. Make depth measurements by test holes, at least 3 inches in diameter, through the base course. Where base course deficiency is more than 1/2 inch, correct by scarifying, adding mixture of proper gradation, reblading, and recompacting. Where the measured thickness is more than 1/2 inch thicker than indicated, consider it as the indicated thickness plus 1/2 inch for determining the average. The average thickness is the average of the depth measurements and shall not underrun the thickness indicated.

3.6 MAINTENANCE: After construction is completed, maintain the base course throughout, except where portion of the succeeding course is under construction thereon. Maintenance includes drainage, rolling, shaping, and watering, as necessary, to maintain the course in proper condition. Correct deficiencies in thickness, composition, construction, smoothness, and density, which develop during the maintenance, to conform to the requirements specified herein. Maintain sufficient moisture by light sprinkling with water at the surface to prevent a dusty condition.

SECTION 02731

AGGREGATE SURFACE COURSE

1.1 APPLICABLE PUBLICATIONS: These standards shall apply, except where additional or more stringent requirements are required by these specifications.

PROVISIONS OF AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM):

ASTM C 117 (2004) Materials Finer Than 75 micrometer (No.

200) Sieve in Mineral Aggregates by Washing

ASTM C 131 (2006) Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 136 (2006) Sieve Analysis of Fine and Coarse Aggregates

ASTM D 75 (2009) Sampling Aggregates

ASTM D 1556 (2009) Density and Unit Weight of Soil in Place by the Sand-Cone Method

ASTM D 1557 (2009) Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/cu. ft. (2,700 kN-m/cu.m.))

ASTM D 2922 (2005) Density of Soil and Soil-Aggregate in Place by Nuclear Methods

(Shallow Depth)

ASTM D 3017 (2005) Water Content of Soil and Rock in Place by Nuclear Methods (Shallow

Depth)

ASTM D 422 (2007) Particle-Size Analysis of Soils

ASTM D 4318 (2010) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

1.2 SUBMITTALS: Copies of field test results within 24 hours after the tests are performed. Test results from samples, not less than 30 days before material is required for the work. Results of laboratory tests for quality control purposes, for approval, prior to using the material.

1.3 DEGREE OF COMPACTION: Degree of compaction is a percentage of the maximum density obtained by the test procedure presented in ASTM D 1557 abbreviated herein as present laboratory maximum density.

1.4 EQUIPMENT: All plant, equipment, and tools used in the performance of the work covered by this section will be subject to approval by the Government before the work is started and shall be maintained in satisfactory working condition at all times. The equipment shall be adequate and shall have the capability of producing the required compaction, and meeting the grade controls, thickness controls, and smoothness requirements set forth herein. Subgrade compaction shall be accomplished by a sheepsfoot roller. Roller shall have feet projecting not less than 6 inches from the surface of the drum and shall have a minimum load on each foot of

250 pounds per square inch of tamping area.

1.5 SAMPLING AND TESTING: Field density tests and laboratory tests shall be performed at a frequency of one set of tests for every 1,000 square yards of completed area. Sampling and testing shall be the responsibility of the Contractor. Sampling and testing shall be performed by an approved commercial testing laboratory. Sampling for material gradation, liquid limit, and plastic limit tests shall be taken in conformance with ASTM D 75.

Aggregate gradation shall be made in conformance with ASTM C 117, ASTM C 136, and ASTM D 422. Sieves shall conform to ASTM E 11. Liquid limit and plasticity index shall be determined in accordance with ASTM D

4318.

1.6 WEATHER LIMITATIONS: Aggregate surface courses shall not be constructed when the ambient temperatures is below 35 degrees F and on subgrades that are frozen or contain frost. It shall be the responsibility of the Contractor to protect, by approved method or methods, all areas of surfacing that have not been accepted.

Surfaces damaged by freeze, rainfall, or other weather conditions shall be brought to a satisfactory condition by the

Contractor.

2.1 AGGREGATES: Aggregates shall consist of clean, sound, durable particles of natural gravel, crushed gravel, crushed stone, sand, slag, soil, or other approved materials processed and blended or naturally combined.

Aggregates shall be free from lumps and balls of clay, organic matter, objectionable coatings, and other foreign materials.

2.1.1 Coarse Aggregates: The material retained on the No. 4 sieve shall be known as coarse aggregate.

Coarse aggregates shall be reasonably uniform in density and quality. The coarse aggregate shall have a percentage of wear not to exceed 50 percent after 500 revolutions as determined by ASTM C 131. The amount of flat and/or elongated particles shall not exceed 20 percent. A flat particle is one having a ratio of width to thickness greater than three; an elongated particle is one having a ratio of length to width greater than three. When the coarse aggregate is supplied from more than one source, aggregate from each source shall meet the requirements set forth herein.

2.1.2 Fine Aggregates: The material passing the No. 4 sieve shall be known as fine aggregate. Fine aggregate shall consist of screenings, sand, soil, or other finely divided mineral matter that is processed or naturally combined with the coarse aggregate.

2.1.3 Gradation Requirements: Gradation requirements specified in TABLE I shall apply to the completed aggregate surface. It shall be the responsibility of the Contractor to obtain materials that will meet the gradation requirements after mixing, placing, compacting, and other operations. TABLE I shows permissible gradings for granular material used in aggregate surface roads and airfields. Sieves shall conform to ASTM E 11.

TABLE I. GRADATION FOR AGGREGATE SURFACE COURSES

Sieve Designation No. 1 No. 2

1 in. 100

3/4 in. 100

3/8 in. 65 maximum 75 maximum

No. 10 5-25 10-30

3.1 STOCKPILING MATERIALS: Prior to stockpiling the material, the storage sites shall be cleared and leveled by the Contractor. Aggregates shall be stockpiled in such a manner that will prevent segregation.

3.2 PREPARATION OF SUBGRADE: Subgrade shall be shaped to line, grade, and cross section, and compacted as specified. At the time of surface course construction, the subgrade shall be cleaned of all foreign substances and shall contain no frozen material. Ruts, soft yielding spots or otherwise unsuitable material in the subgrade or areas having inadequate compaction and deviations of the surface from the requirements set forth herein shall be corrected by loosening and removing soft or unsatisfactory material and by adding approved material, reshaping to line and grade and recompacting as specified. During construction, work shall be performed in a manner and sequence that will ensure proper drainage of the work area.

3.2.1 Compaction shall be accomplished by a minimum of three complete coverages with a sheepsfoot roller over the entire area to be compacted. The sheepsfoot roller shall have feet projecting not less than 6 inches from the surface of the drum and shall have a minimum load on each foot of 250 pounds per square inch of tamping area.