Ground Tire Rubber and Trans-Polyoctenamer as Asphalt Binder Additives

Transcription

1 Ground Tire Rubber and Trans-Polyoctenamer as Asphalt Binder Additives Robert Amme University of Denver Presentation to the Western Research Institute 2004 Symposium on Additives in Roadway Asphalts Cheyenne, Wyoming June 23-25, 2004

2 Outline I. Further Studies of Asphalt Rubber/Rubber Aggregate for paving of paths and trails (non-motorized use); Vestenamer effects. II. Asphalt-Rubber Binder viscosity: Field Measurement Standardization. III. Progress with Asphalt-Rubber Chip Seal instalments in Colorado performance after one year and 2004 sites. IV. Tire-Roadway Noise Generation and the Quiet Pavements Pilot Programs (QP3).

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5 Penn State NECEPT Report (Jan. 24, 2003) Evaluation of Vestenamer Reactive Modifier in Crumb Rubber Asphalt for Degussa Corp. Conclusions: 1. Vestenamer definitely reacts with the ground tire rubber, and has a significant effect on the appearance and workability of the modified binder. 2. Two increases in binder PG grade were observed for some blends; both GTR and GTR + Vestenamer provide higher rutting resistance compared to the control binder (PG58-28, Koch Pavement solutions). 3. Five percent GTR provides one grade bump in the performance grade (PG) of the binder.

6 Macrostructure of ARRA

7 Size distribution of the crumb rubber particles Passing Percent (%) Sieve Size (mm) Rubber Modifier Rubber Aggregates

8 Dry Process for manufacturing ARRA

9 Dimensions of Tested Samples (compaction pressure: 140 kpa)

10 Blending effect on tension testing. (5% vestenamer modified ARRA 50-50, Testing temperature: 210C, compaction pressure: 140 kpa, Strain rate: /min) Stress (kpa) Strain

11 Smoother surface of vestenamer modified ARRA

12 Vestenamer Effect on Mechanical behavior of ARRA (Testing temperature: 21 C; Compaction pressure: 140 kpa) Stress (kpa) Stress (-kpa) Strain (*-1) Strain 0% Vestenamer/#4 5% Vestenamer/#4 Vestenamer ratio effect on the tension behavior of ARRA, Strain rate: /min Vestenamer ratio effect on the compression behavior of ARRA, Strain rate: /min

13 Low temperature behavior of ARRA (Compaction pressure: 140 kpa) Stress (kpa) Strain (*-1) Low temperature effect on tension behavior of 5%wt vestenamer modified ARRA, Strain rate: /min Low temperature effect on compression behavior of 5% wt vestenamer modified ARRA, Strain rate: /min

14 T=190 C (374 F)

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16 Summer 2004 AR Projects Demonstrate an ARRA Trail for C-DOT and for state parks; Demonstrate 6 or 7 new Asphalt-Rubber Chip-Seal projects at sites with varying climates (one project may involve Vestenamer ) totaling ca. 700,000 yd 2 ; Initiate sound level measurements for chip seals; Initiate skid resistance measurements on wet and dry AR chip-seal surfaces.

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23 What is Noise, How is it Controlled, and How Does it Affect Our Lives

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25 Doubling Traffic adds 3dBA

26 Effect of Distance On Noise Levels for Site 3D Comparison of the Leq Data Relative to 50 ft away, 5 ft high AZ 202 Preproject PCCP 90 50x12 100x5 R 2 = Sound Level at Vary ing D is t, d B A x5 R 2 = R 2 = Sound Pressure Level at 50x5 ft, dba

27 How Is It Controlled At the Source Vehicle & Tire Emissions Through Distance 3 dba Reduction for Each Doubling of Distance 25ft=70dBA, 50ft=67dBA, 100 ft=64 Through Obstructions Berms, Walls, And Combination of both

28 The Technical Journey? Development of Improved OGFC for Use in Snow Country (1970s-80s) Improved OGFC Used to Resist Reflective Cracking (1980s-90s) Improved OGFC Used as PCCP Overlay (1980s-2000s) Benefit For Smoothness (1990s) Benefit for Noise (1990s-2000s)

29 ADOT Uses ARFC to Provide Quiet Pavements The ARFC is Minus 9.5mm & 9-9.5% Binder 12.5 mm Thick When Used on Flexible Pavement 25 mm Thick When Used on PCCP ADOT Uses Pavement Type (ARFC) as a Noise Mitigation Strategy (4 dba)

30 Controlled At the Source

31 Arizona Quiet Pavement Research Effort FHWA/ADOT Quiet Pavement Pilot Program (QP3) or Composite Program Ten Year, Multi Million Dollar Effort Flexible Pavement Program Rigid Pavement Program Study of Environmental Effects

32 Development of the Arizona Quiet Pavement Pilot Program ADOT Receives a 4 dba Credit for ARFC Ten Year, Multi Million Dollar Research Program Underway Composite Flexible Rigid Program Intended to Evaluate the Efficacy of Quiet Pavement Solutions

33 Quiet Pavement Pilot Program

34 11:40 11:50 Environmental Factors 5 Minute L 50 Values - AZ 101 Preproject PCCP Aug 7th Aug 8th 50 ft x 5 ft 50 ft x 12 ft 100 ft x 5 ft Sound Pressure Level, dba 11:30 11:00 11:10 11:20 11:30 11:40 11:50 12:00 12:10 12:20 12:30 12:40 12:50 10:00 10:10 10:20 10:30 10:40 10:50 11:00 11:10 11:20 Time of Day

35 Ways of Measuring Sound Wayside (Far Field) Close Proximity (Near Field) Noise Intensity (Near Field)

36 ADOT ISO CPX Trailer 1995 Spg 2000 Spg 2001 Spg 2002 Spg

37 Noise Intensity

38 Network Level Evaluation of ARFC Surfaces AR_ACFC Noise Levels Versus Pavement Age CPX Noise Levels dba y = x R 2 = Pavement Age

39 Evaluation of PCCP Tining Methods Longitudinal Uniform Transverse Random Transverse

40 SR 101 Before and After Results db(a) C:( (A) Hz; db(a) / 2.00E-05 Pa; 3.577E+00 Pa) Averaged Sp k 2 k 3 k 4 k Hz L db(a) C:( (A) Hz; db(a) / 2.00E-05 Pa; 3.776E+00 Pa) Averaged Spectrum Ch1 MicF k 2 k 3 k 4 k Hz Lin(A) db(a) C:( (A) Hz; db(a) / 2.00E-05 Pa; 844.4E-03 Pa) Averaged Spectrum Ch1 MicF k 2 k 3 k 4 k Hz Lin(A)

41 Tining Experiment Roadside Measurement Results at 50 ft R 2 = Lmax (dba) R 2 = R 2 = vehicle speed (mph) RS1 random transverse, autos RS2 uniform longitudinal, autos RS3 uniform transverse RS1 random transverse, medium truck RS2 uniform longitudinal, medium truck RS3 uniform transverse RS1 random transverse, heavy trucks RS2 uniform longitudinal, heavy trucks RS3 uniform transverse Linear (RS1 random transverse, autos) Linear (RS2 uniform longitudinal, autos) Linear (RS3 uniform tra

42 Before and After Results of Site 3A 86 Sound Levels at 50 ft - AZ 101 Pre & Post Project Uncorrected for Traffic Volume/Speed/Mix ft x 5 ft 50 ft x 12 ft 70 14:50 14:55 15:00 15:05 11:00 11:05 11:10 11:15 11:20 11:25 11:30 11:35 11:40 11:45 11:50 11:55 12:00 12:05 12:10 12:15 12:20 12:25 12:30 12:35 12:40 12:45 12:50 12:55 14:10 14:15 14:25 14:30 14:35 14:40 14:45 Sound Pressure Level, dba Time of Day

43 More Before and After Comparison for Site 3A Location Sound Pressure Level, db Arizona 101 Wayside Data at 50 ft - Pre & Post Project OGFC Uncorrected for Traffic Volume/Speed/Mix PCC Avg (82.2 dba) OGRFC Avg (74.3 dba) /3 Octave Band Center Frequency, Hz

44 In Summary Surface Type Does Matter-Noise Should be Controlled at the Source Noise Should be Managed Just Like Friction, Roughness, Rutting, and Cracking People Do Care How They Live-It s a Quality of Life Issue!!!

45 Acknowledgments Arizona DOT; Larry Scofield Rubber Pavements Association; Doug Carlson, executive director ( Colorado Scrap Tire Fund (Colo. Commission on Higher Education)