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Schedule at a Glance

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Monday, November 5

10:00 a.m. - 10:20 a.m.

Speakers:

Marc Mastronardi, Director of Construction, Georgia Department of Transportation

Pete K. Rahn, Maryland Secretary of Transportation

10:20 a.m. - 10:45 a.m.

Stone mastic (matrix) asphalt was first placed in fifty years ago in 1968 near Kiel, Germany, while the United States implemented this premium technology over 25 years ago. Despite the presence of a low bid environment, some agencies have turned to SMA as a trusted product to give them performance. As one of the individuals responsible for bringing SMA to the United States, Mike Acott will explain why the industry looked to this product in the 1990s and why it is still a product truly engineered for performance today.

 

Speaker:

Mike Acott, President, National Asphalt Pavement Association

10:45 a.m. - 12:00 p.m.

Panelists:

Pete K. Rahn, Maryland Secretary of Transportation

Danny Gierhart, Senior Regional Engineer, Asphalt Institute

Knut Johannsen, Head of MPA at EUROVIA Services GmbH, Germany

Matthew Corrigan, Asphalt Pavement Engineer, Federal Highway Administration

Helen Bailey, Managing Director, The Driven Company

12:00 p.m. - 1:00 p.m.

1:00 p.m. - 1:30 p.m.

Cold and long winters and the use of studded tires caused a lot of damages in the road network in Germany in the 1960s. The industry was looking for a solution how to repair these damages. A hot liquid mastic was used to fill the “mechanical ruttings” and to make the more resistant to the traffic a single size aggregates fraction was manually spread into the mastic. The repair mix showed an excellent resistance on one hand side to the damages caused by the studded tires but also to the deformations during the hot summer months caused by heavy duty traffic. Two major contractors picked-up the idea of that repair mix and industrialized it giving birth to SMA. The first section was paved on July 30th, 1968 in Wilhelmshaven. A journey through 50 years of success with Stone Mastic Asphalt. 

 

This presentation will cover the further development of SMA and SMA based mixtures during the last 50 years and will show new possibilities e.g. noise reduction and structural layers. Futhermore, it will provide additional information regarding the spread of SMA around the globe will be seen with examples from Korea, Taiwan, China, Philippines, Australia, New Zealand, Mexico, Brazil, Argentina, Israel, Turkey and of course all over Europe.

 

Speaker:

Horst Erdlen, Manager Business Unit bei J. Rettenmaier & Söhne, Germany

1:30 p.m. - 2:00 p.m.

When it comes to asphalt pavement performance, nothing works like SMA. What is it about the design of SMA mixes that helps them achieve levels of performance beyond those of traditional mixtures? Attend this session to gain a better understanding of the theory behind SMA mix designs and how these designs provide an unparalleled level of performance in the field.

Speaker: 

Dr. Ray Brown,  Director Emeritus, National Center for Asphalt Technology (NCAT) 

2:00 p.m. - 2:30 p.m.

The Pennsylvania Department of Transportation is one DOT in the US that knows SMA can be a part of its Long Life Asphalt Pavement Program. Since originally developing its SMA standards, it implemented Warm Mix SMA in 2017 and conducted performance testing to baseline and validate it’s premium performance. Today, PennDOT uses WMA SMA in all 11 PennDOT Engineering Districts.

 

Speaker: 

Neal Fannin, Pavement Materials Engineer, PennDOT

2:30 p.m. - 3:00 p.m.

3:00 p.m. - 3:30 p.m.

Since its introduction into the United States, stone matrix asphalt has gained great popularity among state highway agencies as a premium asphalt mix to enhance field performance and extend life expectancy of asphalt pavements and overlays. Considering that SMA is generally more expensive than the conventional Superpave dense-graded mixture, mainly due to higher asphalt contents, requirements for more durable aggregates, and inclusion of fibers as stabilizers, it remains unclear whether the higher cost of SMA can be justified by the increase in life expectancy of the mix. This presentation highlights a study undertaken to quantify the performance and life-cycle cost benefits of SMA versus those of polymer-modified Superpave dense-graded mixtures used on similar trafficked highways.

 

Speaker: 

Fan Yin, Assistant Research Professor, NCAT

3:30 p.m. - 4:00 p.m.

While the mix design for an SMA mixture is critical, it is also important that plant operations be considered to ensure that the mixture produces replicates the design as closely as possible. This session will highlight best practices for producing SMA at common asphalt plants to ensure the mixture that arrives at the job is the mixture which was designed to perform.

Speaker:

Terry Roof, Assistant General Manager of Asphalt Plants, Superior Paving

4:00 p.m. - 4:30 p.m.

Efficient compaction of SMA in the field is similar in many ways to compacting other asphalt mix types; however, there are inherent challenges that can occur due to the nature of the materials in the mixture. Learn the best practices for ensuring that SMAs achieve the desired density in the field to help ensure performance. A brief comparison of field compaction approaches in North America and Europe and how they impact SMA construction will be also be presented.

 

Speaker:

Todd Mansell, Product Application Specialist, Caterpillar Paving

4:30 p.m. - 5:00 p.m.

Speaker:

Kamil E. Kaloush, PhD, PE, Professor, Arizona State University

5:45 p.m. - 7:00 p.m.

A welcome reception will be available for all of those in attendance. This is an opportunity to network and enjoy time with other conference participants.

 

Tuesday, November 6

7:00 a.m. - 8:00 a.m.

8:00 a.m. - 10:00 a.m.

  • SMA - A Temperamental Diva from Germany
  • SMA - Virginia's 25 Year Journey
  • SMA in Argentina - Lessons Learned
  • Historical Review and Construction of Durable SMA Pavement in Chicago, Illinois

 

(Schedule subject to change)

8:00 a.m. - 10:00 a.m.

  • Sustainable Successes in SMA Mixtures
  • Evaluation of Alternative Materials in SMA
  • Utilization of Reclaimed Asphalt Pavement in Design of SMA Mixtures
  • Effect of Rejuvenators on RAP Based SMA

 

(Schedule subject to change)

10:00 a.m. - 10:30 a.m.

10:30 a.m. - 12:00 p.m.

  • SMA Mixes with Local Aggregates
  • Test Method of Analysis from Different Types of Fillers
  • Accelerated Testing of Alternative Aggregate SMA Mixtures on the NCAT Test Track
  • SMA with Ground Tire Rubber - A Contractor's Perspective
  • SMA Innovations at the Tollway

 

(Schedule subject to change)

10:30 a.m. - 12:00 p.m.

  • Forensic Investigation of Premature Rutting
  • Road Trials of Low Noise, High Performance Asphalt Surfacings
  • Development of a High-Performance SMA Suited to the Surface Course of National Highways in Japan's Cold, Snowy Regions
  • Ontario's Journey to Overcome SMA Low Early Skid Resistance
  • The Effect of Flat and Elongated Properties on SMA Performance

 

(Schedule subject to change)

12:00 p.m. - 1:00 p.m.

1:00 p.m. - 3:00 p.m.

  • Stone Matrix Asphalt Case Study, Thornton, Illinois
  • A Study on the Effect of Rejuvenator in RAP Based SMA
  • Case Study in Washington State: Evaluation of Long-Term Performance of SMA
  • Benefits of SMA: A Maryland Case Study

 

(Schedule subject to change)

1:00 p.m. - 3:00 p.m.

  • WMA Mix SMA - Eary Age Opening
  • Design of Stone Matrix Asphalt Using Warm Mix Technology
  • Evaluation of Fracture Resistance of Warm SMA Mixes Utilizing RAP and Plastic Waste

 

(Schedule subject to change)

3:00 p.m. - 3:30 p.m.

3:30 p.m. - 5:00 p.m.

  • Development and Peformance of "Fiberless" SMA
  • Laboratory Performance Evaluation of SMA in Virginia
  • Laboratory Performance of Fiberless SMA 0/115 WMA in Brazil
  • A Performance Driven Laboratory Evaluation of SMA

 

(Schedule subject to change)

3:30 p.m. - 5:00 p.m.

  • The Application and Performance Monitoring of High Recycled Content Mixtures on Strategic Roads
  • SMA Improved Performance Measured with Pavement Management Data
  • Challenges and Opportunities in Characterization of SMA in MEPDG
  • Socio-Economic Impacts of Low Rolling Resistance SMA

 

(Schedule subject to change)

5:45 p.m. - 6:45 p.m.

A networking reception will be available for all of those in attendance. This is an opportunity to network and enjoy time with other conference participants.

  

Wednesday, November 7

7:00 a.m. - 8:00 a.m.

8:00 a.m. - 8:30 a.m.

The main oval pavement structure at the Indianapolis Motor Speedway was originally constructed in 1909.   Although it is commonly referred to as The Brickyard, the original pavement was an aggregate base on compacted subgrade with a sealcoat as the original racing surface.  That surface failed during a series of race events on August 19, 1909 and was replaced in the fall of that same year with a layer of paving bricks, most of which still exist at the bottom of the current pavement structure.  The utilization of hot-mix asphalt began on portions of the turns in 1936, but it wasn’t until 1976 before the entire track was paved at one time.  The most recent rehabilitation occurred in 2004, and this presentation will inform the audience as to why SMA was chosen, what the designs looked like along with field results, how the project went and how it’s been performing today.  The existing racing surface will be 14 years old this fall and has lasted longer than any full resurfacing placed to date, which is directly attributable to the use of SMA.”

 

Speaker:

William J. Pine, P.E., QC Director of Asphalt Technology, Heritage Construction & Materials, Heritage Research Group @ The Center

8:30 a.m. - 9:00 a.m.

SMA produced from larger sized aggregates can provide a surface texture that exceeds the 1 mm typically required by airport regulators around the world.  As a result, many Australian airports are interested in SMA as an ungrooved runway surface.  However, other countries, such as China and Germany, have already made significant use of SMA as an ungrooved runway surface.  This paper describes the benefits and global use of SMA as an ungrooved runway surface and describes the current effort to introduce this technology to Australian airports.

 

Speaker:

Greg White, Director of the Airport Pavement Research Program, University of the Sunshine Coast

9:00 a.m. - 9:30 a.m.

While stone matrix asphalt is a mixture of choice for durability, it is also becoming the sustainable choice in Denmark. The Danish Road Directorate (DRD) has recently developed an SMA mixture designed to reduce the rolling resistance of the pavement. This, in turn, will reduce the emissions coming from vehicles and save money on fuel for the country. This presentation will provide the latest information regarding the DRD and their low rolling resistance mixture.


Speaker:

Matteo Pettinari, PhD., Specialist in Asphalt Materials and Flexible Pavements, Danish Road Directorate 

9:30 a.m. - 10:00 a.m.

While many agencies worldwide use SMA for standard thickness overlays and wearing courses, few have ventured into thinner applications for this mixtures. Transport Scotland has been successfully placing SMA less than 30 mm (1.18 inches thick). This session will highlight why Transport Scotland is looking at thinner SMA applications and how they plan to effectively use this tool for network management.

 

Speaker:

Martin McLaughlin, Engineering and Programme Manager, Transport Scotland

10:00 a.m. - 10:30 a.m.

While Route 66 may be the most road in the US, few roads are more famous world-wide than the Autobahn in Germany. This high performance road is known for allowing its drivers to push the limits of speed in some areas requiring a pavement which will perform in this high octane environment. In the past, when the Autobahn was repaved, then entire roadway was shut down and multiple pavers were used in echelon to provide a high quality surface; however, on the latest SMA repave, the entire leveling and surface courses were paved full width (one paver) to eliminate joints . This presentation will discuss why SMA was chosen in this application and how this “wide-open” paving was completed.

 

Speaker:

Larry Michael, Larry L Michael, LLC

10:30 a.m. - 10:50 a.m.

10:50 a.m. - 11:50 a.m.

Panelists:

Dennis Bonds, PE, Director of Quality Control, APAC-MS, Inc.

Carsten Karcher, Director for the European Asphalt Pavement Association

Matteo Pettinari, PhD., Specialist in Asphalt Materials and Flexible Pavements, Danish Road Directorate

Horst Erdlen, Manager Business Unit bei J. Rettenmaier & Söhne, Germany

11:50 a.m. - 12:00 p.m.

Speaker:

Richard Willis, Ph.D., Director of Pavement Engineering & Innovation, NAPA

12:00 p.m.