TRB conducted a webinar on August 2, 2012, from 2:00 p.m.-4:00 p.m. ET that explored the use ground tire rubber in asphalt products. Contact Reggie Gillum at
RGillum@nas.edu for information on receiving a recording of this webinar.
The utilization of scrap tire rubber in asphalt products started in the mid-1960s for use in asphalt surface treatments as a pavement preservation practice, such as chip seal applications. In the 1970s, ground tire rubber (GTR) in asphalt rubber chip seals was used as a stress absorbing membrane interlayer. Today it is used in asphalt-rubber open graded friction course, hot-applied chips seals, asphalt-rubber dense graded, and warm mix asphalt with rubberized asphalt.
GTR-modified asphalt has evolved due to the enhancement in performance, including resistance to rutting; and thermal, reflective, and fatigue cracking. Reported benefits include reduction in pavement maintenance, smooth ride, good skid resistance, and noise reduction. The increasing cost of polymers has made GTR technology an option for asphalt modification, which has drawn the attention of highway agencies.
This webinar will be an overview of GTR use in asphalt including field and terminal blend of rubberized asphalt.
Panelist Presenters:
- Hugh Chapman, Seneca Petroleum Company: Terminal Blends
- Mark Belshe, Rubber Pavement Association: Field Blends
- Why we modify asphalt and ways to modify asphalt
- Various methods using rubber to modify asphalt
- Asphalt Rubber history and overview
- Field blending methods and issues
- Performance of Asphalt Rubber mixes and spray applications
- Asphalt Rubber Open Graded Friction Courses – performance and advantages
- Economic and environmental advantages of using crumb rubber derived from scrap tires
- DingXin Cheng, California State University, Chico: Rubber modified asphalt with warm mix applications
- Overview
- Warm mix technologies and benefits to rubber modified asphalt
- Rubberized hot mix asphalt with warm mix additives
- Research results
- Rubberized warm mix projects in California
- Rubberized warm mix projects in other places
- Warm mix with asphalt rubber spray applications
- Caltrans current and future plan on RHMA and Terminal Blends with warm mix
Moderated by: John D'Angelo, D’Angelo Consulting
Webinar learning objectives:
At the end of this webinar, attendees will be able to:
- Learn the various uses of ground tire rubber in asphalt and their respective applications, and
- Decide in what paving application they can best use a rubberized asphalt product.
Registration information:
There is no fee for employees of
TRB sponsors who register using their work email address. In addition to employees of TRB sponsor organizations, the following are eligible to receive complimentary webinar registration:
- TRB and National Academies employees
- Chairs of TRB standing committees, sections, or groups
- Members of the media
- Congressional staff members
Other sites must pay $89 per site.
View our pricing page for details.
After registering you will receive a confirmation email containing information about joining the webinar.
Professional Development Hour information:
A certificate for 2 Professional Development Hour (PDH) will be provided to Professional Engineers (PEs) who register and attend the webinar as an individual. For groups, only the person that registers and attends the session will receive a PDH certificate.
Individuals registered as Florida PEs are required to email Reggie Gillum,
RGillum@nas.edu, with their license number.
Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.
This webinar was developed in May 2012. TRB has met the standards and requirements of the Registered Continuing Education Program (RCEP). Credit earned on completion of this program will be reported to RCEP by TRB. Certificates of Completion will be issued to individuals who register for and attend the entire webinar session. Complaints about registered providers may be sent to RCEP, PO Box 1686, Clemson, SC, 29633. Website:
www.RCEP.net.
Registration questions? Contact Reggie Gillum at
RGillum@nas.edu.
This Summary Last Modified On: 8/8/2012