Research Pays Off Seminar Series
Every 3rd Tuesday of the month 10:00 - 11:00 a.m. (CST)
Road Research will provide a monthly seminar* to highlight research topics that will make an impact on the work done here in the state of Minnesota and around the country.
2018 Upcoming Webinars
March 20--Recycled concrete aggregates in new concrete pavements, Farhad Reza,
Department of Mechanical & Civil Engineering, Minnesota State University Mankato
Summary-- Conservation and reuse of resources are important aspects of sustainability. It is common practice in the US to crush old concrete pavements at the end of their service lives into recycled concrete aggregate (RCA) and then reuse them in the base course of new pavements. It is not, however, common to use the RCA in the new concrete pavement itself. This seminar examines the sustainability, and in particular, the economics of using RCA in the construction of new concrete pavements. Life cycle cost analyses were performed for various hypothetical pavement construction scenarios including RCA both in the base and in the concrete layer and compared with conventional options. If RCA is simply substituted for natural aggregate in a concrete mixture, the concrete is likely not to perform as well as a concrete made without RCA. This can be compensated for by decreasing the water-cement ratio and/or increasing the cement content. Despite this fact, the results of the life cycle cost analyses show that it can be very economical to use RCA in new concrete pavement construction. Since the natural aggregate used for concrete may be more expensive than the natural aggregate used for base courses, it may make good economic sense to substitute RCA for natural aggregate in concrete. Life cycle analysis also shows that concrete with RCA may have better environmental impact.
April 17--Chip Seal Program in Oregon, Ashley Buss, Iowa State University.
May 15--Development of Energy-, Cost-, and Environment-Based Life-Cycle Tool for In-Place Recycling Methods, Hasan Ozer, PhD and Imad Al-Qadi,
Civil and Environmental Engineering Department
University of Illinois at Urbana-Champaign, Illinois Center for Transportation
Summary: The webinar will introduce the life-cycle assessment (LCA) tool developed for Federal Highway Administration (FHWA) to evaluate energy consumption and environmental impacts of in-place recycling techniques. The tool was developed consistent with the FHWA’s pavement LCA framework for the use of local and state highway agencies to make comparative assessment of in-place recycling techniques with their conventional alternatives. A comprehensive inventory database was developed through inventory modeling and data collection from contractors and agencies. The tool provides a user-friendly platform for state and local agencies to make life-cycle based decisions for selecting in-place recycling alternatives. Case studies will be presented to illustrate the potential use cases of the tool.
*To the best of our knowledge, this course/activity meets the continuing education requirements for PDHs as outlined in Minnesota Statute 326.107. More information concerning continuing education for professionals is available on the Minnesota Board of AELSLAGID website.
2017 Archived Webinars
February 20--MnDOT’s use of the Paver Mounted Thermal Profile (PMTP) Method and Veta Software to Find Workmanship Issues in HMA Paving
Jan. 16--Pavement Preservation Panel Discussion
Dec. 19--Reclaimed Asphalt Pavement (RAP) in Pavement Preservation Applications with Don Matthews, TSD Manager Chief Engineer for Pavement Recycling Systems, Inc. in Jurupa Valley, CA.
Nov. 21-- Biomaterials and Biopolymers with Chris Williams, Gerald & Audrey Olson Professor of Civil Engineering and Director of the Asphalt Materials & Pavements Program, Iowa State University.
Oct. 17--Validated Intelligent Compaction (VIC) Testing at MnROAD and Engineering Data Analysis with David J. White, Ph.D., P.E. President and Chief Engineer, Ingios Geotechnics, Inc
Sept. 19--The Effects of Bio-Sealants or Rejuvenators on Asphalt Binder and Mixture Properties with Debaroti Ghosh, Research Engineer for MnDOT
July 18--Balanced Mix Design David Newcomb from the Materials and Pavement Division of Texas A&M Transportation Institute
Slide from Dave's Presentation with links to video of all the tests he mentioned.
Cracking Test Videos (Powerpoint)
May 16--Factors Affecting Asphalt Mix Durability (Video)
- Factors Affecting Asphalt Mixture Durability (WHRP 14-06), Barry Paye (Powerpoint)
- Critical Factors Affecting Asphalt Concrete Durability, Ramon Bonoquist (Powerpoint)
April 18 - National Road Research Alliance Long Range Research Plans (PDF)
Feb. 21 - Barriers to Implementation of In-Place Recycling