1. Asphalt Specification Changes July 2005 Contractor Asphalt Training Rich Hewitt, PE District Bituminous Engineer District Five Materials & Research

2. Asphalt Specification Changes July 2005 What are we going to talk about? What are we going to talk about? Background & General Information Background & General Information Specifics on 334 Changes…a bunch! Specifics on 334 Changes…a bunch! Specifics on 337 Changes…a few! Specifics on 337 Changes…a few! Specifics on 234 Changes…one slide! Specifics on 234 Changes…one slide! Questions & Discussion Questions & Discussion

3. Asphalt Specification Changes July 2005 CQC Asphalt Specification Task Team CQC Asphalt Specification Task Team Industry, FHWA, FDOT Industry, FHWA, FDOT Fall 2004 Fall 2004 Statistical evaluation of data Statistical evaluation of data Review significant changes to… Review significant changes to… 334 Superpave Asphalt Concrete 334 Superpave Asphalt Concrete 337 Asphalt Concrete Friction Courses 337 Asphalt Concrete Friction Courses 234 Superpave Asphalt Base 234 Superpave Asphalt Base

4. Asphalt Specification Changes Section 334 General reorganization: General reorganization: 334-1 Description 334-1 Description 334-2 Materials 334-2 Materials 334-3 General Composition of Mixture 334-3 General Composition of Mixture 334-4 Contractor Process Control 334-4 Contractor Process Control 334-5 Acceptance of the Mixture 334-5 Acceptance of the Mixture 334-6 Comparison Testing 334-6 Comparison Testing 334-7 Method of Measurement 334-7 Method of Measurement 334-8 Basis of Payment 334-8 Basis of Payment

5. Asphalt Specification Changes Section 334 334-5 Acceptance of the Mixture 334-5 Acceptance of the Mixture 334-5.1 General 334-5.1 General 334-5.2 Lot Sizes 334-5.2 Lot Sizes 334-5.3 Initial Production Requirements 334-5.3 Initial Production Requirements 334-5.4 Quality Control Sampling and Testing 334-5.4 Quality Control Sampling and Testing 334-5.5 Verification Testing 334-5.5 Verification Testing 334-5.6 Resolution System 334-5.6 Resolution System 334-5.7 Independent Sample Verification Testing 334-5.7 Independent Sample Verification Testing 334-5.8 Surface Tolerance 334-5.8 Surface Tolerance 334-5.9 Minimum Acceptable Quality Levels 334-5.9 Minimum Acceptable Quality Levels

6. Asphalt Specification Changes Section 334 334-1.4 Thickness 334-1.4 Thickness Specify thickness instead of spread rate Specify thickness instead of spread rate Old: 200 lbs/yd 2 Old: 200 lbs/yd 2 New: 2 inches New: 2 inches Control based on spread rate Control based on spread rate Convert thickness to spread rate: Convert thickness to spread rate: Spread rate (lbs/yd 2 ) = t x G mm x 43.3 Spread rate (lbs/yd 2 ) = t x G mm x 43.3 Plan quantities based on G mm of 2.540 Plan quantities based on G mm of 2.540 Approximately 110 lbs/yd 2 – granite mix Approximately 110 lbs/yd 2 – granite mix

7. Asphalt Specification Changes Section 334 334-1.4.Thickness 334-1.4.Thickness Fine Mixes (Nearest ½ inch) Fine Mixes (Nearest ½ inch) Type SP-9.51 – 1½ inches Type SP-9.51 – 1½ inches Type SP-12.51½ - 2½ inches Type SP-12.51½ - 2½ inches Type SP-19.02 - 3 inches Type SP-19.02 - 3 inches Permits two layers of SP-9.5 (fine) Permits two layers of SP-9.5 (fine) Stacking Stacking Can’t use SP-9.5 (fine) on Traffic Level D & E Can’t use SP-9.5 (fine) on Traffic Level D & E

8. Asphalt Specification Changes Section 334 334-1.4.Thickness 334-1.4.Thickness Coarse Mixes (Nearest ½ inch) Coarse Mixes (Nearest ½ inch) Type SP-9.51½ - 2 inches Type SP-9.51½ - 2 inches Type SP-12.52 - 3 inches Type SP-12.52 - 3 inches Type SP-19.03 - 3 ½ inches Type SP-19.03 - 3 ½ inches

9. Asphalt Specification Changes Section 334 334-2.2 Superpave Asphalt Binder: 334-2.2 Superpave Asphalt Binder: PG 67-22 – Standard Binder Grade PG 67-22 – Standard Binder Grade Traffic Level D – PG 76-22 top structural layer Traffic Level D – PG 76-22 top structural layer PG 76-22 is polymer modified PG 76-22 is polymer modified Traffic Level E – PG 76-22 top two structural layers Traffic Level E – PG 76-22 top two structural layers 334-3.2 Mix Design: 334-3.2 Mix Design: 3 mix designs/NMAS/traffic level/binder grade/contract year 3 mix designs/NMAS/traffic level/binder grade/contract year Coarse and fine allowed for all Traffic Levels Coarse and fine allowed for all Traffic Levels

10. Asphalt Specification Changes Section 334 334-4 Process Control 334-4 Process Control Address in QC Plan how PC failures will be handled Address in QC Plan how PC failures will be handled Basically need to address problem, then resample Basically need to address problem, then resample Second failure stop production, contact Engineer Second failure stop production, contact Engineer 334-5.1.2 Acceptance Testing Exceptions: 334-5.1.2 Acceptance Testing Exceptions: Less than 500 tons of any mix type, visual inspection Less than 500 tons of any mix type, visual inspection Engineer may require PC tests or IV tests Engineer may require PC tests or IV tests

11. Asphalt Specification Changes Section 334 334-5.2 Lot Sizes 334-5.2 Lot Sizes If a Lot is terminated on QC failure, Lot sizes go to 2000 tons If a Lot is terminated on QC failure, Lot sizes go to 2000 tons Partial Lots will not be redefined Partial Lots will not be redefined 334-5.4.4 Individual Test Tolerances for Quality Control Testing: 334-5.4.4 Individual Test Tolerances for Quality Control Testing: Revised Master Production Range Revised Master Production Range

12. Asphalt Specification Changes Section 334 Table 334-4 Master Production Range Characteristic Tolerance (1) Asphalt Binder Content ( percent) Target ± 0.55 Passing No. 8 [2.36 mm] Sieve ( percent) Target ± 5.50 Passing No. 200 [75 µm] Sieve ( percent) Target ± 1.50 Air Voids ( percent) Coarse Graded 2.00 – 6.00 wider Air Voids ( percent) Fine Graded 2.30 – 6.00 wider Density, percent G mm (2) Coarse Graded (minimum) Coarse Graded (minimum)93.00 Fine Graded (minimum) 90.00 new (1) Tolerances for sample size of n = 1 from the verified mix design (2) Based on an average of 5 randomly located cores

13. Asphalt Specification Changes Section 334 334-5.4.4 Individual Test Tolerances for Quality Control Testing: 334-5.4.4 Individual Test Tolerances for Quality Control Testing: Added single density value < 91.00% Added single density value < 91.00% Coarse mixes Coarse mixes Single low density value – correct problem Single low density value – correct problem Two in same sublot - stop Two in same sublot - stop Any Lot terminated on QC failure is limited to a maximum pay factor of 1.00 per characteristic Any Lot terminated on QC failure is limited to a maximum pay factor of 1.00 per characteristic 334-5.5 Verification Testing: 334-5.5 Verification Testing: Single non-comparison → Resolution Single non-comparison → Resolution

14. Asphalt Specification Changes Section 334 334-5.6.3 Resolution Determination: 334-5.6.3 Resolution Determination: No additional time granted No additional time granted 334-5.9.5 Defective Material: 334-5.9.5 Defective Material: “Cleaned up” “Cleaned up” Better describes actual process Better describes actual process Allows delineation testing Allows delineation testing

16. Asphalt Specification Changes Section 334 334-8.2 Pay Factors: 334-8.2 Pay Factors: Modified Small Quantity Pay Table Modified Small Quantity Pay Table Modified PWL Spec Limits Modified PWL Spec Limits

17. Table 334-7 Specification Limits Quality CharacteristicSpecification Limits Passing No. 8 [2.36 mm] sieve ( percent)Target ± 3.1 Passing No. 200 [75  m] sieve ( percent) Target ± 1.0 Asphalt Content ( percent)Target ± 0.40 Air Voids – Coarse Mixes ( percent)4.00 ± 1.40 Air Voids – Fine Mixes ( percent) tighter 4.00 ± 1.20 tighter Density – Coarse Mixes ( percent of G mm ):94.50 ± 1.30 Density – Fine Mixes ( percent of G mm ):93.00 + 2.00, wider - 1.20 (1) wider Note (1): If the Engineer (or Contract Documents) limits compaction to the static mode only, the specification limits are as follows: 92.00 + 3.00, - 1.20. No additional compensation, cost or time, shall be made.

18. Asphalt Specification Changes Section 337 Asphalt Concrete Friction Courses 337-2.2 Asphalt Binder: 337-2.2 Asphalt Binder: Use PG 76-22 when called for in Contract, otherwise ARB Use PG 76-22 when called for in Contract, otherwise ARB 337-6.2.1 Individual Test Tolerances for FC-5 Production: 337-6.2.1 Individual Test Tolerances for FC-5 Production: Single binder content out = stop Single binder content out = stop Two out on gradation = stop Two out on gradation = stop Address IAW “Defective Material” Address IAW “Defective Material” Note: 334-9.4 no longer exists, 334-5.9.5 was intended.

19. Asphalt Specification Changes Section 337 337-8 Thickness of Friction Courses 337-8 Thickness of Friction Courses FC-9.5 & FC-12.5: use 334-1.4 FC-9.5 & FC-12.5: use 334-1.4 Spread rate (lbs/yd 2 ) = t x G mm x 43.3 Spread rate (lbs/yd 2 ) = t x G mm x 43.3 FC-5: FC-5: Spread rate (lbs/yd 2 ) = t x G sb x 40.5 Spread rate (lbs/yd 2 ) = t x G sb x 40.5 G sb = combined aggregate bulk specific gravity of the verified mix design G sb = combined aggregate bulk specific gravity of the verified mix design Plan quantities based on G sb of 2.635 Plan quantities based on G sb of 2.635 Spread rate of 80 lbs/yd 2 Spread rate of 80 lbs/yd 2 337-9.3 Hydrated Lime Pretreatment: 337-9.3 Hydrated Lime Pretreatment: Allow lime pretreated aggregate Allow lime pretreated aggregate 45-day window for use after pretreatment 45-day window for use after pretreatment Spec addresses QC and certification requirements for blending operations Spec addresses QC and certification requirements for blending operations

20. Asphalt Specification Changes Section 234 Superpave Asphalt Base 234-8 Thickness Requirements. 234-8 Thickness Requirements. Convert thickness to spread rate: Convert thickness to spread rate: Spread rate (lbs/yd 2 ) = t x G mm x 43.3 Spread rate (lbs/yd 2 ) = t x G mm x 43.3

21. Questions?