section_02749_hot bituminous plant mix

SECTION 02749

HOT BITUMINOUS PLANT MIX (COMMERCIAL SOURCE)

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

A. This work shall consist of constructing one or more courses of hot bituminous plant mix on a prepared base or roadbed. Surface to be constructed upon shall be approved, in writing, by the Contracting Officer prior to placing plant mix.

B. Where a layer is to be placed over an existing pavement or a previously placed layer, the new layer shall be firmly bonded to the preceding layer.

C. The Contractor shall conduct tests and inspection required in Subsections 3.15, 3.16, and 3.17 as referenced in this subsection.

D. Submit Job Mix Formula at least 15 days prior to the start of mixing operations.

E. Testing/Inspection frequency shall be as indicated below. Repeat tests shall be conducted in any areas where test results indicate noncompliance with specification requirements. All tests shall be conducted under the direction of a registered engineer or certified testing laboratory.

PART 2 - PRODUCTS

2.1 BITUMINOUS MATERIAL

A. Asphalt cement shall meet the requirements of AASHTO M 20 for penetration-graded asphalt cement and AASHTO M 226 for viscosity- graded asphalt cement. The exact percent of asphalt cement and the grade to be used will be furnished by the Contracting Officer after test results required in Subsection 2.4 have been reviewed and evaluated. The grade may be changed one step by the Contracting Officer during construction with no change in unit price.

2.2 AGGREGATE FOR HOT BITUMINOUS PAVEMENT

A. Aggregate shall meet the grading requirements shown below, unless approved otherwise by the Contracting Officer.

(AASHTO T 11 and T 27)

B. Aggregates for hot bituminous pavement shall be crushed stone, slag, or gravel meeting the quality requirements shown in Table 02602-1.

C. When crushed gravel is used, at least 50 percent by weight of the particles retained on the Number 4 sieve shall have at least one mechanically fractured face.

TABLE 02602-1

CRUSHED AGGREGATE QUALITY REQUIREMENTS

FOR HOT BITUMINOUS PAVEMENT

Test Method Requirement

* An approved chemical additive may be used to meet this requirement.

2.3 ADDITIVES

A. Filler shall meet the requirements of AASHTO M 17. Hydrated lime shall meet the requirements of ASTM C 207, Type N. Additives, such as filler, hydrated lime, and anti-strip agents may be used as necessary to meet specifications.

2.4 JOB MIX-FORMULA

A. The job mix-formula shall meet the requirements shown below or the Contractor may submit test results and job mix formulas accepted by and currently being used by state road agencies. The mix should utilize ¾” crushed aggregate conforming to the gradation shown above and AR4000 grade asphalt. If performance based asphalt (PBA) is available it should be used instead of the AR grade. The polymer modifiers included in PBA asphalt will provide better performance than standard AR grade asphalt in the high elevation cold winter climate of Chester. PBA-6B is the recommended asphalt.

If an equivalent Super-Pave asphalt grade (PG) is available, it is also acceptable to use. A standard Cal trans mix design produced by local hot mix plants but amended for the PBA-6B or Super-Pave asphalt can be used. After review of the submitted material, the Contracting Officer will determine a job-mix formula and notify the Contractor in writing or request additional information or testing.

B. Prior to producing bituminous mixtures, the Contractor shall submit, in writing, a proposed job mix-formula for each mixture to the Contracting Officer for use in setting the job mix-formula to be used with the proposed materials. The proposed job mix shall be submitted at least 15 days prior to the start of mixing operations.

C. For bituminous mixtures, the proposed job mix-formula shall be based on a mix-design-run on aggregates, crushed or otherwise, produced for the project and by using bituminous material that will be furnished for the project. The Contracting Officer shall be notified of the time the samples will be taken and shall be supplied duplicate samples of each material.

D. Job mix-formula:

1. Each job mix formula shall propose definite single values (hereafter referred to as Target Values-TV) for:

a. The percentage of aggregate passing each specified sieve, based on the dry weight of aggregate. These percentages shall be within the range shown in Subsection 2.2.4.

b. The percentage of bituminous material to be added based on the total weight of mixture.

c. The temperature of the mixture leaving the mixer.

d. The temperature of the mixture placed on the road. This is defined as the time immediately preceding initial compaction of the mixture.

e. The kind and percentage of additives to be used.

f. The kind and percentage of mineral filler to be used.

g. The percentage of water, based on the total dry weight of mixture.

h. Emulsions only--the percentage of total fluids at compaction, based on the total dry weight of the mixture.

i. For dense graded hot mix, the maximum specific gravity of bituminous paving mixtures as determined by AASHTO T 209. For open graded hot mixes, the laboratory density developed during mix design shall be used as the target value. It shall be the maximum density for the target value bituminous content.

j. In addition, except for emulsion mixes, the job mix-formula, as submitted by the Contractor, shall conform to the following:

70%+ 70%+ 70%+

*For aggregates having maximum sizes over 1-inch (25.4mm). AASHTO T 165 will be modified to use 6-inch (152mm) by 6-inch (152) cylindrical specimens. The 6-inch (152mm) cylinders will be compacted by the procedures outlined in AASHTO T 167 modified to employ 10 repetitions of a molding load of 1,400 pounds per square inch (9.653 MPA) with no appreciable holding time after application of the full load.

k. The mixture shall have a minimum dry retained strength of 200 psi.

l. Should a change in source of material be proposed, or should a job mix-formula prove unsatisfactory, a new job mix-formula shall be established by the Contractor.

m. All of the requirements above shall apply to the new job mix-formula supplied by the Contractor.

n. The Contractor shall supply penetration/viscosity/temperature relationships for the bituminous material to be used in the work along with a certification from the supplier as to their accuracy. If the supplier finds it desirable or necessary to change crudes or blends of crudes, new relationships must be supplied along with a sample to use in running a new mix-design 15 days prior to delivery of material from the changed source of materials. The penetration and viscosity values shall be determined at the temperatures and by the procedures specified in AASHTO M 226.

o. The Contracting Officer must approve the proposed job mix formula prior to use.

E. Hot bituminous mixtures:

1. The mix-design shall be run in accordance with (a) or (b) as follows:

a. Marshall Method: The stability and flow tests shall be run in accordance with AASHTO T 245 with the following exceptions:

1) All specimens shall be compacted by applying 75 blows of the compaction hammer to both ends of the specimen. The number of sets of specimens required shall be sufficient to fully develop curves of bituminous content versus mix properties.

2) A density and void analysis shall be done in accordance with procedures described in the latest edition of The Asphalt Institute Manual Series No. 2 (MS - 2).

3) Determination of optimum asphalt content shall be based on recommendations given in MS - 2 that yield optimum mix properties. The minimum acceptable stable meter value shall be 1500.

4) When aggregate is required to be produced and/or stockpiled in more than one size, the blend of sizes shall be based on results of mix design properties that yield the most ideal results. The blended gradations, however, must stay within the gradation limits specified.

5) The Contracting Officer shall be furnished curves developed from the mix design for percent of asphalt by dry weight of mix versus unit weight, percent air voids, stability, flow, and percent voids in mineral aggregate.

6) The Contracting Officer shall be furnished a laboratory report giving all the items required to be reported in AASHTO T 245.

b. Hveem Method:

1) Specimens shall be prepared in accordance with AASHTO T 247. The stability and cohesion tests shall be run in accordance with AASHTO T 246. The number of sets of specimens required shall be sufficient to fully develop curves of bituminous content versus mix properties.

2) The same as paragraphs (2), (3), and (4) in “a.” above, except the last sentence in (3) shall be deleted and the following substituted:

“The minimum acceptable stableometer value shall be 37.”

3) The Contracting Officer shall be furnished curves developed from the mix design for percent of asphalt by dry weight of mix versus percent air voids, stability, and cohesion-meter value.

4) The Contracting Officer shall be furnished a laboratory report giving all the items required to be reported in AASHTO T 246. In addition, the report shall include values for mixing and compacting temperatures determined in accordance with procedures given in AASHTO T 245.

PART 3 - EXECUTION

3.1 BITUMINOUS MIXING PLANT FOR HOT BITUMINOUS PAVEMENTS

A. Plants used for the preparation of hot bituminous mixtures shall meet the requirements in AASHTO M 156, unless producing approved materials for local State highway departments, with the following changes:

1. Requirements for All Plants:

a. All projects involving 5,000 tons or more shall be automated, as described in AASHTO M 156, Sections 6.7 and 7.5.

b. AASHTO M 156, par. 7.6.4, does not apply to weighing devices. The bituminous mixture shall be weighed on scales furnished in accordance with the requirement shown below:

c. When the measurement is by weight, the Contractor shall provide weigh scales, and shall transport the materials so they can be weighed. All weighing shall be done by the Contractor.

2. Platform Scales: Platform scales shall be of sufficient length and capacity to permit simultaneous weighing of all axle loads of each hauling unit.

a. The scales shall be accurate to within 1 percent of the correct weight throughout the range of use. Before using the scales and as frequently thereafter as the Contracting Officer determines necessary to ensure accuracy, the Contractor shall have the scales checked, adjusted, and certified by a representative of the State agency responsible for weights and measures or by a qualified manufacturer's representative. The Contractor shall maintain the scales to the required accuracy.

b. The Contractor shall provide the Government with copies of weight tickets from a certified scale.

c. The Contractor may have the material weighed on other certified scales without additional compensation and shall furnish certified weight tickets for all material delivered to the project. The Contractor shall guarantee permission for a Government representative to periodically check the weighing procedure and records.

3. Belt Conveyor Scales: Belt conveyor weighing will be accepted in lieu of platform scales, provided this method or device meets the requirements specified below and is compatible with the provisions of measurement and payment in the applicable specifications.

a. The belt conveyor scale shall meet the design, marking, installation, and tolerance requirements of the National Bureau of Standards Handbook No. 44, and shall be certified by a copy of a National Bureau of Standards Prototype Examination Report of Test.

4. The weighing mechanism shall contain a weight totalizer and a self-printing device that legibly imprints the load-out weight on appropriate serial numbered and time-dated tickets. The time dating may be done either by an automatic printing device or manually. Each ticket shall be delivered to the Government representative at job site or point of use. The totalizer calibration adjustment and ticket imprinter shall be furnished with a security lock and key. Under observation of the Contracting Officer or of a designated Government representative, the Contractor shall run a daily zero-load test in accordance with National Bureau of Standards Handbook No. 44.

5. Scales shall be sensitive to one-half the minimum graduation interval, which shall not be greater than 10 pounds.

6. AASHTO M 156; delete paragraph 3.8 and substitute the following:

a. The plant shall be equipped with a dust collector constructed to waste or return uniformly to the hot elevator all or any part of the material collected without the escape of objectionable dust into the atmosphere.

b. A wet scrubber or other protective device for further treatment of the effluent dust charge gases emanating from the mixing plant dust collector shall be used as needed to comply with established air pollution standards.

c. Liquids from a wet scrubber shall not be discharged into a live stream, lake, or pond. The effluent shall be circulated through sludge pits or settling tanks. The resultant sedimentation, together with all other waste material developed by the crushing and mixing operation, shall be covered or otherwise disposed. Dust proof covers shall be installed over the screens.

7. Requirements for Dryer-Drum Mixing Plants:

a. Dryer-drum mixers shall be specifically designed and constructed for the process and shall be capable of producing a uniform mixture. A positive means of controlling mixing time shall be provided showing the rate of aggregate flow through the mixer per revolution and per minute at the plant operating speed and tilt.

b. The cold feed shall be capable of being calibrated to ensure full control of the mix gradation. The plant shall include means for accurately proportioning each size of aggregate and shall include aggregate bins divided into at least two compartments. Separate dry storage shall be provided for mineral filler, Portland cement, or hydrated lime (if used), and provisions shall be made for accurate proportioning. Each compartment shall have an outlet feed that can be shut off completely and shall be equipped with an automatic plant shutoff that operates when any bin becomes empty. The bins or aggregate feeding system shall be constructed so samples can be readily obtained.

c. Cold feed aggregates for the mixture shall be divided into at least two general sizes and stockpiled or stored separately; one stockpile containing at least 80 percent of the material retained on the Number 4 sieve, and one stockpile containing at least 80 percent of the material passing the Number 4 sieve.

8. Positive weight measurement of the combined cold feed shall be maintained to allow regulation of the feed gate and permit automatic correction for variations in load.

9. The bitumen feed control shall be coupled with the total aggregate weight measurement device to automatically vary the bitumen feed rate and to maintain the required proportion. Means shall be provided for checking and calibrating the quantity or rate of flow of bitumen into the mixing unit.

10. Thermometers shall be fixed in the bitumen feed line at the charging valve of the mixer unit and at the discharge chute of the mixer unit. The Contracting Officer may require replacement of any thermometer by an approved temperature-recording apparatus to allow better regulation of the material temperature.

11. A method shall be provided to automatically adjust the bituminous content in the mix for moisture variations in the cold feed.

12. AASHTO M 156, paragraphs 4.1 and 4.2, and all other reference to hot screens and bins do not apply to continuous mixing plants provided the requirements for feed control of bituminous mixture materials specified above in paragraph (b) for Dryer-Drum mixing plants are met. The following alternates to what is specified in paragraph (b) are acceptable:

a. Paragraph (b)(3). Positive weight measurements may be on the hot feed between the dryer and the mixer unit.

b. Paragraph (b)(5). Temperature measurement of the aggregate may be made at the discharge from the dryer in lieu of temperature measurements of the mix.

c. Paragraph (b)(5). Automatic adjustments in the mix for moisture variation in the cold feed are not required if the alternate in paragraph (b)(3) of weight measurements of the hot feed are used.

3.2 HAULING EQUIPMENT

A. Trucks used for hauling bituminous mixtures shall have tight, clean, smooth metal beds that have been thinly coated with a material to prevent the mixture from adhering to the beds. Truck beds shall be drained prior to loading.

3.3 BITUMINOUS PAVERS

A. Bituminous pavers shall be self-contained, power-propelled units, Bituminous pavers provided with an adjustable activated-screed or strike-off assembly, heated if necessary, and capable of spreading and finishing courses of bituminous plant mix material in lane widths and thicknesses SHOWN ON THE DRAWINGS. When SHOWN ON THE DRAWINGS, pavers shall be equipped with a control system capable of automatically maintaining the proper screed elevation. The control system shall be automatically actuated from either a reference line or surface through a system of sensors that will maintain the pave screed at a predetermined transverse slope and at the proper elevation to obtain the required surface. The transverse slope control system shall be capable of being made inoperative so that the screed can be controlled by mechanisms that will independently control the elevation of each end of the screed from reference lines or surfaces.

B. The controls shall be capable of working in conjunction with any of the following attachments:

1. Ski-type device of not less than 30 feet in length.

2. Taut string line (wire) set to grade.

3. Short ski or shoe.

C. The Contractor shall furnish the long ski, the short ski, or shoe and furnish and install all required stakes and wire for a taut string line.

3.4 COMPACTION EQUIPMENT

A. Compaction equipment shall meet the requirements specified in Section 02300 and as approved by the Contracting Officer.

3.5 WEATHER LIMITATIONS

A. Hot Mixes:

The bituminous mixture shall not be placed when weather conditions prevent the proper handling or finishing of the mixture, when the base course is frozen, or when the average temperatures of the underlying surface upon which the bituminous mixture is to be placed are less than those specified in the following table:

Surface Temperature Limitations Compacted Thickness of Layer to be Placed Surface Course

Subsurface Courses

* Only when air temperature is rising.

B. Placing during rain or other adverse weather conditions or when foundation contains standing water or flowing water, will not be permitted.

3.6 CONDITIONING OF EXISTING SURFACE

A. Immediately before placing the bituminous mixture, the existing surface shall be cleaned of loose or deleterious material.

B. Contact surfaces of curbing, gutters, manholes, and other structures shall be painted with a thin, uniform coating of bituminous material prior to placing bituminous mixture.

3.7 PREPARATION OF BITUMINOUS MATERIAL FOR HOT BITUMINOUS PAVEMENTS

A. The bituminous material shall be evenly heated to the specified temperature. A continuous supply of the bituminous material shall be fed to the mixer at a uniform temperature. The temperatures of asphalt cement delivered to the mixer shall be in accordance with Subsection 2.1.2.

3.8 PREPARATION OF AGGREGATES FOR HOT BITUMINOUS PAVEMENTS

A. Aggregate for pugmill mixing shall be heated, dried, and delivered to the mixing unit at a temperature within +30 F of the bitumen, but shall not exceed 325 F. Moisture content of the aggregate shall not exceed 1 percent at the time it is introduced into the mixing unit. Flames used for drying and heating shall be properly adjusted to avoid damage to the aggregate and soot on the aggregate.

B. Moisture content of the mixture from dryer-drum mixing plants shall not exceed 3 percent at the output in accordance with AASHTO T 110.

3.9 MIXING

A. The aggregates, bituminous material, additives, mineral filler, and water shall be measured or gauged and introduced into the mixer in the amount specified by the job mix formula.

B. After the required amounts of aggregate, bituminous material, and other required materials have been introduced into the mixer, the materials shall be mixed until a complete and uniform coating of the particles and a thorough distribution of the bituminous material throughout the aggregate is obtained.

3.10 CONTROL OF BITUMINOUS MIXTURE

A. The Contractor has the responsibility of providing the necessary tests to maintain the mixture within the TV's specified by the job mix-formula. The Contracting Officer may also do expedient quality control testing determinations to spot check the acceptability of the product during progress of the job. These test results will not be used for acceptance testing, but the results will be made available to the Contractor upon request. Upon completion of a unit of work, hereafter referred to as a lot, the Contracting Officer will perform acceptance tests.

B. For the purpose of acceptance sampling and testing in accordance with Subsection 3.15, a lot is defined as the number of tons of material or work produced, and/or placed, and that will be represented by randomly selected samples tested for acceptance.

C. The size of a lot will be approximately 2,000 tons or one day's production. The Contracting Officer will establish the lot sizes to fit field conditions, testing, and production capabilities. A minimum of two tests per lot will be taken. Acceptance or rejection of completed work will be on a “per lot” basis.

3.11 TRANSPORTING, SPREADING, & FINISHING

A. The mixture shall be transported from the mixing plant to the point of use in vehicles meeting the requirements of Subsection 3.2.

B. The mixture shall be spread and struck off to the grade and elevation established. Bituminous pavers shall be used to distribute the mixture. Maximum compacted lift thickness shall be 4 inches unless otherwise SHOWN ON THE DRAWINGS.

C. The longitudinal joint in one layer shall offset that in the layer immediately below by approximately 6 inches. The joint in the top layer shall be at the centerline of a two-lane traveled way. Transverse joints in succeeding layers and in adjacent lanes shall be offset at least 10 feet.

D. On areas where irregularities or unavoidable obstacles make the use of mechanical spreading and finishing equipment impracticable, the mixture may be placed and finished by hand tools.

3.12 COMPACTION

A. Compaction shall be performed with vibratory or non-vibratory steel-wheel rollers and pneumatic-tire rollers. Compaction equipment shall meet the requirements of Subsection 3.4.1.

B. Rolling shall begin at the sides and proceed longitudinally parallel to the road centerline, each trip overlapping 6 inches or two times the pavement depth, whichever is greater, gradually progressing to the center. When paving in echelons or abutting a previously placed lane, the longitudinal joint should be rolled first, then followed by the above rolling procedure. On super-elevated curves, the rolling shall begin at the low side and progress to the high side.

C. Initial breakdown rolling shall be accomplished while the mix temperature exceeds 250 F. Rolling shall be completed while mix temperature exceeds 175 F.

D. Along forms, curbs, headers, walls, and other places not accessible to the rollers, the mixture shall be thoroughly compacted with hot hand tampers, smoothing irons, or mechanical tampers.

3.13 JOINTS, TRIMMING EDGES, & CLEANUP

A. Placing of the bituminous mixture shall be continuous. Rollers shall not pass over the unprotected end of a freshly laid mixture. Transverse joints shall be formed by cutting back into the previous run to expose the full depth of the course. Heat shall be applied to contact surfaces of transverse joints just before any additional mixture is placed against the previously rolled material.

B. Material trimmed from the edges and any other discarded bituminous mixture shall be removed from the roadway and disposed of by the Contractor in an approved area.

3.14 FINISHED WORK SAMPLES

A. The Contractor shall cut samples from the pavement. Sample size and locations will be per Section 01442 and/or DESIGNATED by the Contracting Officer. Samples shall be neatly cut with a saw or core drill. Voids left by sampling shall be backfilled and compacted to the density of the surrounding material.

3.15 ACCEPTANCE SAMPLING & TESTING FOR GRADATION & BITUMINOUS CONTENT OF BITUMINOUS MIXTURE

A. Acceptance samples of the mixture will be taken after it has been discharged into hauling units or placed on the road in accordance with AASHTO T 168. Samples will be selected on a random basis.

B. Samples will be tested for bitumen content by means of AASHTO T 164 or other methods approved by the Contracting Officer. Gradation of the entire quantity of extracted aggregate shall be determined in accordance with AASHTO T 30.

C. The lot will be accepted if:

1. All individual test results for gradation fall within the grading band specified in Subsection 2.2 for hot mixes.

2. The average of all test results and measured temperatures fall within the tolerances shown in the following table:

Bitumen Content

Sieve Size – Percent by Weight

TV(0.5

Temperature

3.16 ACCEPTANCE SAMPLING & TESTING FOR COMPACTION OF BITUMINOUS MIXTURE

A. After the bituminous mixture has been placed and compacted, the lot will be accepted with respect to compaction if:

1. All individual test results equal or exceed 92 percent compaction for cold mix and open graded hot mix, and 89 percent for dense graded hot mix, and

2. The average of all test results equals or exceeds 95 percent compaction for cold mix and open graded hot mix, and 92 percent for dense graded hot mix.

B. Samples and tests will be taken as frequently and at such locations as the Contracting Officer elects. Testing will be in accordance with AASHTO T 230 or ASTM D 2950 or other approved methods. The specific gravity of standard specimens shall be determined in accordance with AASHTO T 166 Method A.

C. If directed by the Contracting Officer, a control strip may be used to establish the target density. Procedures for constructing the control strip shall be required as shown below. Acceptance requirements (a) and (b) above shall apply. Those areas failing to meet density requirements shall be replaced.

1. A new test strip shall be required for any of the following:

a. Any change in the characteristics of the material.

b. Any change in the pavement thickness.

c. If the weather turns cooler (reduction by 20 F).

2. To determine target density, a control strip shall be constructed at the beginning of work on each type of material to be compacted. Each control strip, constructed to acceptable density and surface tolerances, shall remain in place and become a section of the completed roadway.

a. Unacceptable control strips shall be corrected or removed and replaced at the Contractor's expense. A control strip shall have an area of approximately 400 square yards and shall be of the same depth specified for the construction of the course that it represents.

3. The materials used in the construction of the control strip shall meet the specification requirements. They shall be furnished from the same source and shall be of the same type and moisture content used in the remainder of the course represented by the control strip.

4. The base upon which a control strip is to be constructed will be approved by the Contracting Officer before placing control strip material.

5. The equipment used in the construction of the control strip will be approved by the Contracting Officer and shall be of the same type and weight as that to be used on the remainder of the course represented by the control strip.

6. Compaction of control strips shall commence immediately after the course has been placed to the specified thickness and shall be continuous and uniform over the entire surface. Compaction of the control strip shall be continued until no discernable increase in density can be obtained by additional comp active effort.

7. Upon completion of the compaction, the mean density of the control strip will be determined by averaging the results of 10 nuclear density tests taken at randomly selected sites within the control strip. The mean density of the control strip shall be the target density for the remainder of the course that it represents.

8. If the mean density of the control strip is less than 95 percent of the maximum density as determined in the laboratory compacted specimens, the Contracting Officer may request the construction of another control strip.

9. The specified course shall be compacted to at least 95 percent of the target density. Density will be tested by a portable nuclear moisture-density test device in accordance with AASHTO T 238 and T 239.

3.17 ACCEPTANCE SAMPLING & TESTING FOR SURFACE & THICKNESS TOLERANCE OF BITUMINOUS MIXTURE A. Surface:

1. Acceptance testing will be performed on the top surface. The surface shall be tested by the Contracting Officer with a 10-foot straightedge. The variation of the surface from the testing edge of the straightedge shall not deviate at any point more than 3/8 inch.

B. Thickness:

1. The total compacted thickness of the mixture shall not vary more than ¼ inch for wearing course or 1/2 inch for base course from the specified thickness. The compacted thickness shall not be consistently below nor consistently above the specified thickness.

C. The Contracting Officer reserves the right to test areas that appear defective and require immediate correction.

3.18 ACCEPTANCE SAMPLING & TESTING OF BITUMINOUS MATERIALS

A. Acceptance of bituminous material will be based upon certificates and samples provided in accordance requirements shown below. Transport truck tanks shall be completely drained.

1. Certification with Shipments: When each load of bituminous material is delivered, the Contractor shall furnish the Contracting Officer with one copy of the Bill of Lading and a fully executed Certificate of Compliance conforming to the format below. A separate Certificate of Compliance will not be required if the standard Bill of Lading contains the essential information required by the certificate.

Consignee Designation Contract Number Date Identification (truck no., car no., etc.)

Type and Grade With Additive (percent and brand) Loading Temp. Net Weight Net Gallons Specific Gravity This shipment of bituminous material identified above and covered by this Bill of Lading complies with Section 02749.

Producer

Signed

2. Sampling: Sampling of bituminous material may be required to validate certifications furnished by the Contractor. When sampling is required by the Government, the actual samples shall be obtained by the Contractor in the presence of the Contracting Officer. All delivery and plant equipment shall be constructed to permit sampling in conformance with AASHTO T 40 test procedure.

END OF SECTION

DINKEY MILL & BLUE CANYON HELIPADS

SIERRA NATIONAL FOREST

DIVISION 2 02749-17