Activities as TurnerFairbank Highway Research Center Jack Youtcheff
![Activities as Turner-Fairbank Highway Research Center Jack Youtcheff Materials & Construction Team Federal Highway Activities as Turner-Fairbank Highway Research Center Jack Youtcheff Materials & Construction Team Federal Highway](https://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-1.jpg)
Activities as Turner-Fairbank Highway Research Center Jack Youtcheff Materials & Construction Team Federal Highway Administration www. TFHRC. gov
![What’s Go’in On • Modified Binder Research Program – ALF ‘ 93, 90 -07, What’s Go’in On • Modified Binder Research Program – ALF ‘ 93, 90 -07,](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-2.jpg)
What’s Go’in On • Modified Binder Research Program – ALF ‘ 93, 90 -07, ALF ‘ 01, PG 67 -80 Study • Phosphoric Modification of Asphalt Binders – AASHTO SOM, Binder ETG • Evaluation of Moisture Damage – 3 D Flow Models, Fundamental Chemistry • Warm Mix Asphalt – WHO, IARC, EPA, NAPA, NCAT, FHWA
![Experiment Objectives • Primary – Refine Superpave for Modified Binders • Secondary, Evaluate… – Experiment Objectives • Primary – Refine Superpave for Modified Binders • Secondary, Evaluate… –](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-3.jpg)
Experiment Objectives • Primary – Refine Superpave for Modified Binders • Secondary, Evaluate… – M-E Pavement Design Guide – Crumb Rubber-Modified Asphalts • Arizona and Terminal Blend Processes – Simple Performance Test
![Final Test Matrix… AZ PG PG CRM Air TX 70 -22 PG SBS Air Final Test Matrix… AZ PG PG CRM Air TX 70 -22 PG SBS Air](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-4.jpg)
Final Test Matrix… AZ PG PG CRM Air TX 70 -22 PG SBS Air SBS T-P 70 -22 ---Blown TBCR + 70 -2264 -40 Blown Control 70 -22 Fibers 1 2 3 4 5 6 7 8 9 10 11 12
![ALF Testing Rutting Thigh = 64°C Fatigue Tint = 19°C 1 2 3 4 ALF Testing Rutting Thigh = 64°C Fatigue Tint = 19°C 1 2 3 4](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-5.jpg)
ALF Testing Rutting Thigh = 64°C Fatigue Tint = 19°C 1 2 3 4 Replicate Fatigue Tint = 28°C
![ALF Testing Status (Jan. 05) 1 2 3 4 Lane 5 6 7 8 ALF Testing Status (Jan. 05) 1 2 3 4 Lane 5 6 7 8](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-6.jpg)
ALF Testing Status (Jan. 05) 1 2 3 4 Lane 5 6 7 8 9 10 11 12 Rutting Test Completed Rutting Test ALF 2 ALF 1 Fatigue Test Shakedown Test Completed Fatigue Test - Initial Strain Measurements: Complete - Rutting Tests: All 12 Lanes Complete - Fatigue Tests: Lanes 1, 2, 4, and 5 Complete - Current Fatigue Tests: Lanes 3 and 6
![Rutting Testing Results Rutting Testing Results](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-7.jpg)
Rutting Testing Results
![HMA Layer Rutting among 100 -mm HMA Pavements HMA Layer Rutting among 100 -mm HMA Pavements](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-8.jpg)
HMA Layer Rutting among 100 -mm HMA Pavements
![HMA Layer Rutting among 150 -mm HMA Pavements HMA Layer Rutting among 150 -mm HMA Pavements](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-9.jpg)
HMA Layer Rutting among 150 -mm HMA Pavements
![Lime PG 79 Lime PG 79](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-10.jpg)
Lime PG 79
![Comparison to Lab Mixture Tests • French Pavement Rutting Tester • Hamburg Wheel Testing Comparison to Lab Mixture Tests • French Pavement Rutting Tester • Hamburg Wheel Testing](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-11.jpg)
Comparison to Lab Mixture Tests • French Pavement Rutting Tester • Hamburg Wheel Testing Device • Superpave Shear Tester – Repeated Shear at Constant Height (RSCH) – Frequency Sweep (FS) • Simple Performance Tests (under way)
![Preliminary Conclusions • Limited Correlation between ALF and mixture lab tests, so far… Best: Preliminary Conclusions • Limited Correlation between ALF and mixture lab tests, so far… Best:](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-12.jpg)
Preliminary Conclusions • Limited Correlation between ALF and mixture lab tests, so far… Best: – 100 mm: French PRT vs. ALF – 150 mm: RSCH vs. ALF • PG 67 -80 Study…
![In situ ALF Binders ETG Concern In situ ALF Binders ETG Concern](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-13.jpg)
In situ ALF Binders ETG Concern
![67 -80 Binders 58 64 70 76 82 88 67 -80 Binders 58 64 70 76 82 88](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-14.jpg)
67 -80 Binders 58 64 70 76 82 88
![Fatigue Testing Results Fatigue Testing Results](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-15.jpg)
Fatigue Testing Results
![Lane 2 (Control) Lane 4 (SBS LG) Lane 5 (CR-TB) After 100, 000 Loads Lane 2 (Control) Lane 4 (SBS LG) Lane 5 (CR-TB) After 100, 000 Loads](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-16.jpg)
Lane 2 (Control) Lane 4 (SBS LG) Lane 5 (CR-TB) After 100, 000 Loads After 300, 000 Loads After 100, 000 Loads
![](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-17.jpg)
![](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-18.jpg)
![Future Plan • Complete ALF Fatigue Loading • Conduct Lab Beam Fatigue Tests & Future Plan • Complete ALF Fatigue Loading • Conduct Lab Beam Fatigue Tests &](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-19.jpg)
Future Plan • Complete ALF Fatigue Loading • Conduct Lab Beam Fatigue Tests & SPT • Compare ALF Results to Lab Tests • TWG Meeting in May/June 2005 • Future of APT – with TWG meeting • Continued reporting to the ETG’s
![PPA PPA](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-20.jpg)
PPA
![FHWA Research Problem Statement • Acid modification has been shown to be a low FHWA Research Problem Statement • Acid modification has been shown to be a low](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-21.jpg)
FHWA Research Problem Statement • Acid modification has been shown to be a low cost way to increase the high temperature stiffness of asphalt binders (per Superpave Binder Specification) but… • Studies have shown both beneficial and harmful effects of acid modification. • • • How should it be used? How should it not be used? What are the pitfalls to avoid?
![Proposed Work Plan • Develop forensic method for determining type • and level of Proposed Work Plan • Develop forensic method for determining type • and level of](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-22.jpg)
Proposed Work Plan • Develop forensic method for determining type • and level of phosphate additive Asses durability of acid modification – Effect of environment: light, water, etc. • Address corrosion and handling issues • Optimization of acid modification – Chemical / mechanistic considerations – Different Asphalts – Physical Properties
![WARM MIX ASPHALT TECHNOLOGY 44 th Annual Idaho Asphalt Conference October 21, 2004 Moscow, WARM MIX ASPHALT TECHNOLOGY 44 th Annual Idaho Asphalt Conference October 21, 2004 Moscow,](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-23.jpg)
WARM MIX ASPHALT TECHNOLOGY 44 th Annual Idaho Asphalt Conference October 21, 2004 Moscow, Idaho
![Research Needs • A cooperative agreement between FHWA and NCAT is being developed to Research Needs • A cooperative agreement between FHWA and NCAT is being developed to](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-24.jpg)
Research Needs • A cooperative agreement between FHWA and NCAT is being developed to investigate the performance of three WMA products – WAM-Foam®, Aspha-Min®, Sasobit® (Sasoflex®) – Funding assistance provided by FHWA and through matching funds provided by the product companies • Testing & Evaluation will be conducted at NCAT – – – Compaction at various temperatures Strengthening of the mixes with time Simple performance test, dynamic modulus and moisture sensitivity, etc.
![Research Needs • Compatibility with US? – Mix designs – Equipment – Climate conditions Research Needs • Compatibility with US? – Mix designs – Equipment – Climate conditions](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-25.jpg)
Research Needs • Compatibility with US? – Mix designs – Equipment – Climate conditions – Work practices • Success in Europe = Success in US?
![Research Needs • Investigation into – Long term performance – Cost benefits – Plant Research Needs • Investigation into – Long term performance – Cost benefits – Plant](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-26.jpg)
Research Needs • Investigation into – Long term performance – Cost benefits – Plant operations • Definite reduction in fuel, fumes, emissions? – Control of mixing process – Workability at the paving site – Quick turnover to traffic
![Moisture Moisture](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-27.jpg)
Moisture
![Epoxy Asphalt Epoxy Asphalt](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-28.jpg)
Epoxy Asphalt
![That’s all…for now • Thank you That’s all…for now • Thank you](http://slidetodoc.com/presentation_image_h2/f77ee18e6dddb70b46d6857a57c284b1/image-29.jpg)
That’s all…for now • Thank you
- Slides: 29