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Development of Non-Petroleum Based Binders for Use in Flexible Pavements (TR-594)

Cornstover used to make bio-oils

Researcher(s)

Principal investigators:

Student researcher:

Project status

Completed

Start date: 08/01/08
End date: 07/31/09

Publications

Report: Development of Non-Petroleum Based Binders for Use in Flexible Pavements (TR-594) (4.56 mb pdf) October 2011

Tech transfer summary: Development of Non-Petroleum Based Binders for Use in Flexible Pavements (TR-594) (176.72 kb pdf) Oct 2011

Sponsor(s)/partner(s)

Sponsor(s):

About the research

Abstract:

Most bituminous adhesives or binders that are used for pavement materials are derived primarily from fossil fuels. With petroleum oil reserves becoming depleted and the drive to establish a bio-based economy, there is a push to produce binders from alternative sources, particularly from biorenewable resources. However, until now, no research has studied the applicability of utilizing bio-oils as a bitumen replacement (100% replacement) in the pavement industry.

The main objective of this research was to test various properties of bio-oils in order to determine the applicability of using bio-oils as binders in the pavement industry.

The overall conclusions about the applicability of using bio-oils as bio-binders in the pavement industry can be summarized as follows:

1. Bio-oils cannot be used as bio-binders/pavement materials without any heat pre-treatment/upgrading procedure.

2. Current testing standards and specifications, especially Superpave procedures, should be modified to comply with the properties of bio-binders.

3. The temperature range of the viscous behavior for bio-oils may be lower than that of bitumen binders by about 30°–40°

4. The rheological properties of the unmodified bio-binders vary in comparison to bitumen binders, but the rheological properties of these modified bio-binders change significantly upon adding polymer modifiers.

5. The high-temperature performance grade for the developed bio-binders may not vary significantly from that of the bitumen binders, but the low-temperature performance grade may vary significantly.