MARC Researchers Present Findings at the 100th Transportation Research Board Annual Meeting

January 27, 2021

Participants at the 100th TRB Annual Meeting on January 25-27, 2021 were updated on MARC's latest research findings and developments through a number of presentations on topics of research on-going or completed at MARC including the "Use of Blended Binder Tests to Estimate Performance of Mixtures with High RAP/RAS Content" (Poster), "Effect of Recycling Agents on Rutting Resistance and Moisture Susceptibility of Mixtures with High RAP/RAS Content" (Poster), "Extended Aging Performance of High RAP Mixtures and The Role of Softening Oils" (Poster) and "The Role of Binders in Mixture Cracking Resistance Measured by IDEAL-CT Test" (Poster). Please concat MARC if interested in a copy of the presentations and papers of these research items.

MARC Director Dr. Hussain Bahia Presents Findings at the 99th TRB Annual Meeting in Washington D.C.

July 27, 2020

MARC director Dr. Hussain Bahia delivered two presentations on “Long-Term Performance of Asphalt Concrete Mixed with RAP and RAS” and "Challenges with Characterizing Binders after Extraction and Recovery" at the 99th Transportation Research Board (TRB) Annual Meeting on January 12-16, 2020 in Washington D.C. In the first presentation, the short- and long-term aging performance of high RAP and RAS asphalt mixtures utilizing various recycling additives (“rejuvenators”) in the context of balanced mixture design were discussed. In the second presentation, Dr. Bahia compared the binder properties of the extracted and recovered binders and laboratory blends that contain various binder additives. Please concat MARC if interested in a copy of any of these presentations.

MARC Researchers Present Findings at the 99th TRB Annual Meeting

July 27, 2020

Participants at the 99th Annual Transportation Research Board Meeting on January 12-16, 2020 in Washington D.C. were updated on MARC's latest research findings and developments through a number of presentations on topics of research on-going or completed at MARC including the Estimating Asphalt Binder Fatigue at Multiple Temperatures Using a Simplified Pseudo-Strain Energy Analysis Approach in the LAS Test, Comparison between SCB-IFIT, un-notched SCB-IFIT and IDEAL-CT for Measuring Cracking Resistance of Asphalt Mixtures, Predicting Dynamic Modulus and Rutting Performance of Asphalt Mixture from Binder Properties and Mixture Design Variables, Rheology and Oxidative Aging of Oils Used in Asphalt Recycling, Factors Affecting the Interlayer Shear Strength of Lab and Field Samples and Identifying Fuel Resistance of Modified Asphalt Mixtures for Airfield Flexible Pavements. Please concat MARC if interested in a copy of any of these presentations.

MARC Director Dr. Hussain Bahia Presents Findings at the 64th CTAA Annual Conference in Montreal, Canada

December 16, 2019

MARC director Dr. Hussain Bahia delivered two presentations on the topics of “The Role of Binders in Cracking Resistance of Mixtures Measured with the IFIT Procedure” and "Testing Tack Coats for Curing, Tracking and Bond Strength" at the 64th Annual Conference of Canadian Technical Asphalt Association (CTAA) which was held in Montreal, Canada on November 24-27, 2019. In the first topic, the role of binders in cracking resistance of mixtures measured with the Illinois Flexiblity Index Test (IFIT) procedure are disucssed by analyzing the binder's fatigue behavior meausred by the Dynamic Shear Rheometer (DSR) and relating it to the various stages of the FI test. Dr. Bahia showed that the binder's fatigue life estimated from the Linear Amplitude Sweep (LAS) test correlates reasonably well with the mixture's FI. The second topic is to introduce factors that may affact the curing time, tracking performance, and bond shear strength of aspahlt emulsion tack coats. Dr. Bahia presented that the racking performance is mainly dependent on the rheological properties of the residue and only marginally on the curing time. Please concat MARC if interested in a copy of any of these presentations.

March 20, 2019

MARC Director Dr. Hussain Bahia Presents Findings at the 94th AAPT Annual Meeting in Texas

MARC director Dr. Hussain Bahia delivered a presentation on "Separating Load from Moisture Effects in Wet Hamburg Wheel-Track Test" at the 94th Annual Meeting of Association of Asphalt Paving Technologists (AAPT) which was held in Fort Worth, Texas on March 3-6, 2019. The advances in understanding the confounding effects of the loading and moisture in the wet Hamburg Wheel-Track (HWT) test were presented. A new analysis methodology to model the wet HWT results was proposed to evaluate mixture's rutting resistance and moisture susceptibility. Dr. Bahia showed how the methodology provides a better assessment of the damage due to loading as opposed to moisture damage. The details of this presentation can be found here.

Feburary 01, 2019

MARC Researchers Present Findings at the 98th TRB Annual Meeting

Participants at the 98th Annual Transportation Research Board Meeting on January 13-17, 2019 in Washington D.C. were updated on MARC's latest research findings and developments through a number of presentations on topics of research on-going or completed at MARC including the Interlayer Bonding and Tracking Performance of Tack Coat Materials, Effects of Recycled Asphalt Materials on PG+ Properties and Blending Charts, Factors controlling Behavior of HMA in the SCB Test, Aging Performance of Recycling Agents and their effects on Pavement Performance of RAP Mixtures, and Rutting Resistance Testing by Rotary Asphalt Wheel Tester. Please concat MARC if interested in a copy of any of these presentations.

October 15, 2015

MARC Researchers Present Findings at 8th International RILEM SIB Symposium in Ancona, Italy.

Mr. Pouya Teymourpour and MARC director Dr. Hussain Bahia presented the latest findings in asphalt mastics characterization at 8th International RILEM SIB Symposium in Ancona, Italy on October 7, 2015. The development of failure master curve for the asphalt mastic characterization of low temperature property was introduced in details. It was also concluded that the mastics have significantly different fracture behavior than binders. Therefore it is better to test mastics to predict mixture cracking. This presentation can be accessed here. The former MARC researcher Dr. Nima Roohi Sefidmazgi who's currently affiliated with Green Asphalt Co., and Dr. Bahia also presented the findings in "Mechanisms of Failure in Uniaxial Repeated Creep Test and the Relationship to Aggregate Packing" and the presentation can be found here.

October 10, 2015

MARC Researcher Presents Latest Findings at Rubberized Asphalt Rubber 2015 Conference in Las Vegas, NV.

MARC researcher Mr. Tirupan Mandal presented the latest findings in effect of crumb rubber on rheological properties of asphalt binder and aggregate packing of asphalt mixtures at Rubberized Asphalt Rubber 2015 Conference in Las Vegas, NV on October 4-7, 2015. In his presentation, he hypothesized that crumb rubber size, rubber concentration, and reaction time plays an important role in the rheological properties of rubber modified binders and aggregate packing of rubberized asphalt mixtures. He evaluated the effect of crumb rubber particles on the rheological properties of asphalt binders and the aggregate packing of the rubber modified asphalt mixtures through experimentation and image analysis. The detailed presentation can be accessed here.

August 31, 2015

MARC Researcher Receives IAHE Scholarship.

The MARC researcher Mr. Cheng Ling received the 2015 Grant Shaw Memorial Scholarship from Illinois Association of Highway Engineers in the past summer. Mr. Cheng Ling joined MARC in January 2012 and was initially involved in the asphalt emulsion and cold mix asphalt research as part of Asphalt Research Consortium (ARC). In that research he evaluated the coating and bonding properties of cold mix asphalt (CMA) and their relationship to the moisture susceptibility of CMA. He also developed a mix design protocol and volumetric analysis procedures for CMA. He obtained his second Master's degree on this research and proceeded to his PhD research focused on "Importance of Binder Modification Type and Aggregate Structure on Rutting Resistance of Asphalt Mixtures Using Image-based Multi-scale Modeling". He's currently also involved several research projects on asphalt binder characterization and asphalt mixture performances.

July 31, 2015

MARC Researchers Present Findings at PARC Conference in Laramie, WY.

The former MARC researcher Sebastian Puchalski who's currently affiliated with Kraton Polymers, and MARC director Dr. Hussain Bahia presented the latest findings in investigation of warm mix asphalt additives using the science of tribology to explain improvements in mixture compaction at the 2015 Petersen Asphalt Research Conference (PARC) held by Western Research Institute (WRI) in Laramie, WY. They found that the warm mix additives can affect asphalt concrete compaction, so it is important to look at asphalt as a lubricant at compaction temperatures. In addition, the tribology should be considered in capturing the lubricating effect of warm mix additives. This presentation can be accessed here.

July 15, 2015

MARC Director Dr. Hussain Bahia Presents Latest Findings at GAF Seminar in Wayne, NJ.

MARC director Dr. Hussain Bahia delivered a presentation on "Thermal Cracking of Asphalt Binders and Mastics - Causes and Possible Mitigations" at GAF Seminar in Wayne, NJ on June 25, 2015. The advances in understanding the thermal cracking of binders, effect of fillers and methods of estimating resistance to cracking were presented. The attempt to link these findings to roofing applications was discussed in details. Dr. Bahia also showed how the new testing methods could help producers to estimate quality and reduce the risk of premature failures. The details of this presentation can be found here.