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Presentation
Investigation of Performance Tests using Bio-derived/Chemical Additives
Proceedings of the First International Conference on “Bio-Based Building Materials”
  • Joseph H. Podolsky, Iowa State University
  • Ashley Buss, Iowa State University
  • R. Christopher Williams, Iowa State University
  • Eric W. Cochran, Iowa State University
Document Type
Conference Proceeding
Conference
1st International Conference on Bio-based Building Materials (ICBBM 2015)
Publication Version
Published Version
Publication Date
7-1-2015
Conference Date
June 22-24, 2015
Geolocation
(45.77722199999999, 3.0870250000000397)
Abstract

An industry wide emphasis on sustainable asphalt practices has given rise to increasing use of warm mix asphalt technologies. WMA reduces both binder viscosity and mixing and compaction temperatures by 20-55°C during the asphalt mix production and laydown process. This research investigates several bio-derived WMA additives that act as chemical modifiers with surfactant properties. Two established additives derived from the forest products industry are studied as well as a WMA additive in development that is derived from corn. The WMA material responses are measured for binder testing and mixture testing. All binder testing with the additives was conducted using a Performance Grade (PG) 64-22 binder and the same binder was polymer modified with an SBS polymer to attain a PG 70-22 binder. Dynamic modulus testing on a State DOT approved 10 million ESAL mix design was performed to compare stiffness at a wide range of temperatures and frequencies. The newly developed, corn-derived IDB additive was successful in allowing asphalt to be compacted at a reduced temperature. All additives were added at the same dosage level. The IDB binder and mix test results were comparable to other commercially available WMA additives; however, no particular additive consistently produced the highest or lowest test results.

Comments

This proceeding is published as Podolsky, J. H., A. Buss, R. C. Williams, and E. W. Cochran. "Investigation of performance tests using bio-derived/chemical additives." In Proceedings of the First International Conference on “Bio-Based Building Materials”, ICBBM-2-15, Proceedings PRO 99, eds. S. Amziane and M. Sonebi. Clermont-Ferrand, France. 2015. Posted with permission.

Copyright Owner
RILEM Publications SARL
Language
en
File Format
application/pdf
Citation Information
Joseph H. Podolsky, Ashley Buss, R. Christopher Williams and Eric W. Cochran. "Investigation of Performance Tests using Bio-derived/Chemical Additives" Clermont-Ferrand, FranceProceedings of the First International Conference on “Bio-Based Building Materials” (2015) p. 1 - 8
Available at: http://works.bepress.com/rc_williams/49/