11/19/97

400-R-343
ASPHALT PAVEMENTS

    The Standard Specifications are revised as follows:

SECTION 401, LINE 86, INSERT AS FOLLOWS:

            (b) Gradation Table for Design ESAL Less Than 10,000,000.

 

Nominal Maximum Particle Size - Control Point (Percent Passing)

 

*37.5 mm

*25.0 mm

*19.0 mm

*12.5 mm

*9.5 mm

SIEVE SIZE

 

 

 

 

 

50.0 mm

100.0

 

 

 

 

37.5 mm

90.0 - 100.0

100.0

 

 

 

25.0 mm

< 90.0

90.0 - 100.0

100.0

 

 

19.0 mm

 

< 90.0

90.0 - 100.0

100.0

 

12.5 mm

 

 

< 90.0

90.0 - 100.0

100.0

9.5 mm

 

 

 

< 90.0

90.0 - 100.0

Note 1

A

B

A

B

A

B

A

B

A

B

4.75 mm

< 34.7

> 34.7

< 39.5

> 39.5

 

     

< 90.0

< 90.0

2.36 mm

15.0 -
23.3

27.3 -
41.0

19.0 -
26.8

30.8 -
45.0

23.0 -
34.6

34.6 -
49.0

28.0 -
39.1

39.1 -
58.0

32.0 -
47.2

47.2 -
67.0

1.18 mm

< 15.5

> 21.5

< 18.1

> 24.1

< 22.3

> 28.3

< 25.6

> 31.6

< 31.6

> 37.6

600 µm

< 11.7

> 15.7

< 13.6

> 17.6

< 16.7

> 20.7

< 19.1

> 23.1

< 23.5

> 27.5

300 µm

< 10.0

> 10.0

< 11.4

> 11.4

< 13.7

> 13.7

< 15.5

> 15.5

< 18.7

> 18.7

75 µm

0.0 - 6.0

1.0 - 7.0

2.0 - 8.0

2.0 - 10.0

2.0 - 10.0

* Nominal Maximum Particle size - One sieve size larger than the first sieve to retain more than 10 percent.

            NOTE 1: Either sub-column A or B shall be used consistently for 4.75 mm to 300 µm sieves.

SECTION 401, BEGIN LINE 231, INSERT AS FOLLOWS:
      The maximum percent of moisture in the mixture shall not exceed 0.10 from plate samples.

        The Engineer's acceptance test results will not be made available until a lot is completed and after the certified HMA plant's adjustment period.

ACCEPTANCE TOLERANCE FOR MIXTURES (±)

MIXTURE

NUMBER
OF
TESTS

SIEVE SIZE

*37.5
mm

*25.0
mm

*19.0
mm

*12.5
mm

*9.5
mm

*4.75
mm

2.36
mm

600
µm

75
µm

BASE

1

-----

-----

-----

-----

-----

-----

10.0

6.0

2.0

2

-----

-----

-----

-----

-----

-----

7.0

4.2

1.4

3

-----

-----

-----

-----

-----

-----

5.8

3.5

1.2

4

-----

-----

-----

-----

-----

-----

5.0

3.0

1.0

INTERMEDIATE

1

-----

-----

-----

-----

-----

-----

10.0

6.0

2.0

2

-----

-----

-----

-----

-----

-----

7.0

4.2

1.4

3

-----

-----

-----

-----

-----

-----

5.8

3.5

1.2

4

-----

-----

-----

-----

-----

-----

5.0

3.0

1.0

SURFACE

1

-----

-----

-----

-----

-----

-----

8.0

4.0

1.0

2

-----

-----

-----

-----

-----

-----

5.7

2.8

0.7

3

-----

-----

-----

-----

-----

-----

4.6

2.3

0.6

4

-----

-----

-----

-----

-----

-----

4.0

2.0

0.5

* The acceptance tolerance for this sieve shall be the applicable composition limits specified in 401.05.

SECTION 401, BEGIN LINE 287, INSERT AS FOLLOWS:
      Lot adjustment points will be assessed in accordance with 401.19(a) when the average or range for binder content, coarse aggregate angularity, or gradation are not met.

SECTION 401, BEGIN LINE 375, INSERT AS FOLLOWS:
      401.16 Density. The type of density acceptance method for all QC/QA mixtures shall be determined by the number of mainline ESAL. Shoulder densities shall be controlled by mainline mixes. Density of the compacted mixture shall be accepted by using cores when the ESAL are equal to or greater than 10,000,000 in accordance with 401.16(a). Nuclear testing devices shall be used when the ESAL are equal to or greater than 3,000,000 and less than 10,000,000 in accordance with 401.16(b). Standard rolling pattern practices shall be used when the ESAL are less than 3,000,000 in accordance with 401.16(c).

        The Engineer's acceptance test results will not be made available until a lot is completed.

        Sublot and lot density values will be reported to the nearest 0.1 percent. Rounding will be in accordance with ASTM E 29.

SECTION 401, BEGIN LINE 387, INSERT AS FOLLOWS:
         (a) Mainline ESAL Equal To or Greater Than 10,000,000. Acceptance for density for all QC/QA mixtures shall be based on cores cut from the compacted pavement and analysis of samples obtained in accordance with 401.09. Acceptance will be based on lots and sublots in accordance with 401.07. The Engineer will randomly select two locations in accordance with ITM 802, within each sublot for testing. The transverse core location will be located so that the edge of the core will be no closer than 75 mm (3 in.) from a confined edge or 150 mm (6 in.) from a non-confined edge of the course being placed.

SECTION 401, BEGIN LINE 407, INSERT AS FOLLOWS:
      The Engineer will take immediate possession of the cores. If the Engineer's cores are subsequently damaged, additional coring within a specific sublot or sublots will be the responsibility of the Department. Subsequent core locations will be determined by subtracting 0.3 m (1.0 ft) from the random location using the same transverse offset. Appeal core(s) if required, will be taken within 0.3 m (1.0 ft) of the analyzed core(s) using the same transverse offset.

SECTION 401, BEGIN LINE 427, INSERT AS FOLLOWS:
         (b) Mainline ESAL Equal To or Greater Than 3,000,000 and Less Than 10,000,000. Acceptance for density for QC/QA mixtures shall be based on nuclear testing on the compacted pavement.

        Acceptance will be based on lots in accordance with 401.07. The lots will be divided into sublots of 1600 m² (2000 sq yd) each for the pavement and shoulders. Each lot shall have a minimum of one sublot. The target density shall be determined from a test strip constructed in accordance with ITM 577. The target density shall be not less than 96.0 percent of the unit weight of the mixture at the optimum binder content at Ndes determined from the mix design. A separate test strip will be required on each course placed on the pavement and each course placed on the shoulder. The Engineer may determine the uniformity of compaction by taking cores. An additional test strip may be requested by the Contractor or Engineer.

SECTION 401, BEGIN LINE 453, INSERT AS FOLLOWS:
         (c) Mainline ESAL Less Than 3,000,000. Density requirements for the compacted mixture shall be controlled in accordance with 402.10 and 402.13.

SECTION 401, AFTER LINE 607, INSERT AS FOLLOWS:
      For mixtures produced during a certified HMA plant's adjustment period, adjustment points will not be assessed if the mixture produced is in accordance with the following.

  1. The gradation complies with 401.05 with the allowable tolerance limits shown in 401.09.

  2. The range for the binder content and gradation do not exceed the limits shown in 401.09.

  3. The coarse aggregate angularity and binder content is within the limits shown in 904.02(c) and 401.05.

        If the mixture is not in accordance with these requirements, adjustment points will be assessed in accordance with 401.09 for variations exceeding the requirements shown above.

SECTION 401, BEGIN LINE 613, INSERT AS FOLLOWS:
            1. Mainline ESAL Equal To or Greater Than 10,000,000.

Pay Adjustments - Percent (%) For Thickness of Base & Intermediate > 37.5 mm (1.5 in.) and all Surfaces Mixes

For Thickness of Intermediate Mixes < 37.5 mm (1.5 in.)

 

Percentages are based on % MSG

submitted to Chief, Materials and Tests Division for disposition

> 97.0

> 97.0

1.0 points for each 0.1 % above 96.0

96.0 - 96.9

96.0 - 96.9

100

92.0 - 95.9

91.0 - 95.9

0.2 points for each 0.1 % below 92.0/91.0

91.0 - 91.9

90.0 - 90.9

2.0 + 0.4 points for each 0.1 % below 91.0/90.0

90.0 - 90.9

89.0 - 89.9

6.0 + 1.0 points for each 0.1 % below 90.0/89.0

88.0 - 89.9
See Note 1

87.0 - 88.9
See Note 1

submitted to the Chief, Materials and Tests Division for disposition

< 87.9
See Note 1

< 86.9
See Note 1

SECTION 401, BEGIN LINE 638, INSERT AS FOLLOWS:
            2. Mainline ESAL Equal To or Greater Than 3,000,000 and Less Than 10,000,000. If the average density of a sublot is less than 95.0 percent of the target density, adjustment points will be assessed to the lot containing the sublot. The assessment will be 0.1 points for each 0.1 % below 95.0 %.

SECTION 401, BEGIN LINE 705, INSERT AS FOLLOWS:
            1. Mainline ESAL Equal To or Greater Than 10,000,000. If an appeal is granted, additional cores shall be taken within five calendar days unless otherwise directed. Additional core locations will be within 0.3 m (1.0 ft) longitudinally of the cores tested using the same transverse offset. Each sublot density will be calculated using the average bulk specific gravity of the cores obtained for that sublot and the average MSG of the lot.

        The results of the appeal cores will replace the initial test results for a sublot(s) or lot and be used as the basis for acceptance in accordance with 401.16(a).

SECTION 401, BEGIN LINE 714, INSERT AS FOLLOWS:
            2. Mainline ESAL Equal To or Greater Than 3,000,000 and Less Than 10,000,000. Sublots below 95% density may be appealed. Upon approval of the appeal for additional testing, the Contractor shall take one core 150 mm (6 in.) in diameter from each of the randomly selected sites with a transverse location determined in accordance with ITM 802 within five calendar days unless otherwise directed. The test results of these cores will be averaged for the density of the sublot. Adjustment points will be assessed in accordance with 401.19(b)2 to the lot containing the sublot. The Engineer may, however, order removal and replacement of the sublot.

        Lots below 98% density may be appealed. Upon approval of the appeal for additional testing, the Contractor shall take one core 150 mm (6 in.) in diameter from each of the randomly selected sites with a transverse location determined in accordance with ITM 802 within five calendar days unless otherwise directed. The test results of these cores will be averaged for the density of the lot. Adjustment points will be assessed in accordance with 401.19(b)2.

SECTION 402, BEGIN LINE 25, INSERT AS FOLLOWS:
      402.03 Job Mix Formula. The job mix formula, JMF, shall be prepared in accordance with 402.04 and submitted in a format acceptable to the Engineer. Approval of the JMF will be based on the ESAL and mixture designation. A mixture number will be assigned by the Engineer. No mixture will be accepted until the JMF has been approved.

SECTION 402, BEGIN LINE 34, INSERT AS FOLLOWS:
      402.04 Mix Criteria. The JMF shall be based on the limits shown in the following tables for the percent passing the 2.36 mm (No. 8) sieve and the percent of binder.

        The percent of aggregates passing sieves specified in the mixture composition tables below is a percentage of the total mass (weight) of aggregates. The percent of binder specified in the mixture composition tables below is a percentage of the total mass (weight) of mixture.

        When 100% slag is used for the coarse aggregate, the binder content shall be increased 0.4 percent when using blast furnace slag, and decreased by 0.7 percent when using steel slag. When blending coarse aggregate slag, proportional changes in the binder content shall be made.

SECTION 402, BEGIN LINE 139, INSERT AS FOLLOWS:
      402.06 Acceptance of Mixtures. Sampling of the HMA mixture will be in accordance with ITM 580 and performed where deemed necessary. Acceptance of the mixtures for binder content and gradations will be determined based on extractions in accordance with ITM 571 and coarse aggregate angularity in accordance with 904.02(c). Testing will be performed by the Engineer in accordance with the Frequency Manual.

SECTION 402, BEGIN LINE 158, INSERT AS FOLLOWS:
      The mixture shall be prepared by a HMA mixing plant in accordance with 408.02. All aggregates shall be sufficiently dried such that foaming, flushing, or slumping does not occur in the mix. The maximum percent of moisture in the mixture shall not exceed 0.10 from plate samples.

        The temperature of the finished mixture at the plant shall be within the following limits:

BINDER * TEMPERATURE RANGES, °C (°F)
Minimum Maximum
PG Grade 125° (260°) 150° (300°)
AE Grade 110° (230°) 150° (300°)
* A draindown test in accordance with ITM 585 shall be completed for Base C50.0 mm, Base C25.0 mm, and Intermediate C19.0 mm mixtures.

SECTION 402, BEGIN LINE 314, INSERT AS FOLLOWS:
      Compaction equipment shall be operated with the drive roll or wheels nearest the paver and at speeds not to exceed 4.5 km/h (3 mph). However, vibratory rollers will be limited to 4 km/h (2.5 mph). Rolling shall be continued until applications are completed and all roller marks are eliminated.

SECTION 402, BEGIN LINE 374, INSERT AS FOLLOWS:
      The Engineer will take immediate possession of the cores. If the Engineer's cores are subsequently damaged, additional coring within a specific section will be the responsibility of the Department. Subsequent core locations will be determined by subtracting 0.3 m (1.0 ft) from the random location using the same transverse offset.

SECTION 403, LINE 1, INSERT AS FOLLOWS:

SECTION 403 -- COLD MIX ASPHALT, CMA, PAVEMENT

SECTION 408, BEGIN LINE 46, INSERT AS FOLLOWS:
            6. Dust Collector. The dust collector system shall comply with all applicable laws, ordinances, and regulations regarding emissions. If dust is to be returned into the HMA, the system shall return the materials at a constant rate during production.

SECTION 904, BEGIN LINE 122, DELETE AND INSERT AS FOLLOWS:
         (a) General Requirements. Coarse aggregates shall consist of crushed limestone or dolomite; crushed or uncrushed gravel; crushed steel furnace (SF) slag or air cooled blast furnace (BF) slag; or sandstone. When dolomite coarse aggregates are used in accordance with 401.02 401.03 or 402.02, the material furnished shall be carbonate rock containing
at least 10.3 percent elemental magnesium when tested as set out in ITM No. 205.
Coarse aggregates shall not contain more than 15 10 percent flat or and elongated pieces and
shall not contain particles with an adherent coating. A flat or and elongated piece is defined
as one having a length in excess of 4 times its width a particle having a ratio of length to thickness greater than five. Determination of the width will be
made by hand manipulating the pieces through a standard sieve. The smallest sieve opening through which the piece will pass will be considered the width of the particle. The percentage of these particles will be determined by dividing the weight of flat or elongated particles retained on the 4.75 mm (No. 4) sieve by the total weight of material retained on the 4.75 mm (No. 4) sieve.

SECTION 904, BEGIN LINE 302, DELETE AND INSERT AS FOLLOWS:
         (c) Blank Coarse Aggregate Angularity. The coarse aggregate shall not contain flat and elongated particles exceeding the maximum value for the appropriate ESAL category shown on the title sheet as follows:

FLAT AND ELONGATED PARTICLES

TRAFFIC,
ESAL

PERCENT,
MAXIMUM
< 300,000 -----
< 1,000,000 -----
< 3,000,000 10
< 10,000,000 10
< 30,000,000 10
<100,000,000 10

>100,000,000

10

Flat and Elongated Particles........................ASTM D 4791